SpringCloud是基于SpringBoot之上的用来快速构建微服务系统的工具集,拥有功能完善的轻量级微服务组件,例如服务治理(Eureka),声明式REST调用(Feign),客户端负载均衡(Ribbon),服务容错(Hystrix),服务网关(Zuul)以及服务配置(Spring Cloud Config),服务跟踪(Sleuth)等等。
官网链接:http://projects.spring.io/spring-cloud/
目前主流的版本为SpringBoot1.4.5.RELEAE和SpringCloudCamden.SR7,
Maven pom配置如下:
<parent>
<groupId>org.springframework.bootgroupId>
<artifactId>spring-boot-starter-parentartifactId>
<version>1.4.5.RELEASEversion>
parent>
<dependencyManagement>
<dependencies>
<dependency>
<groupId>org.springframework.cloudgroupId>
<artifactId>spring-cloud-dependenciesartifactId>
<version>Camden.SR7version>
<type>pomtype>
<scope>importscope>
dependency>
dependencies>
dependencyManagement>
<dependencies>
<dependency>
<groupId>groupId>
<artifactId>spring-cloud-starter-configartifactId>
dependency>
<dependency>
<groupId>groupId>
<artifactId>spring-cloud-starter-eurekaartifactId>
dependency>
dependencies>
MacOS10.12+JDK8u131+IntelliJ IDEA2017.1.4
Tomcat8.5+Maven3.3.9+Git2.12+Firefox54
Spring4.3.9.RELEASE+SpringBoot1.4.5.RELEASE+SpringCloud Camden.SR7
工程首先自定义了Maven父工程,其中定义如下的公共组件:
<project xmlns="http://maven.apache.org/POM/4.0.0"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0modelVersion>
<groupId>com.ekeyfund.springcloudgroupId>
<artifactId>springcloud-parentartifactId>
<version>2.0.0-SNAPSHOTversion>
<packaging>pompackaging>
<parent>
<groupId>org.springframework.bootgroupId>
<artifactId>spring-boot-starter-parentartifactId>
<version>1.4.5.RELEASEversion>
<relativePath/>
parent>
<properties>
<project.build.sourceEncoding>UTF-8project.build.sourceEncoding>
<project.reporting.outputEncoding>UTF-8project.reporting.outputEncoding>
<java.version>1.8java.version>
<spring-cloud.version>Camden.SR7spring-cloud.version>
<springcloud-parent.version>2.0.0-SNAPSHOTspringcloud-parent.version>
<druid.version>1.0.31druid.version>
<jackson.version>2.8.8jackson.version>
<commons-lang3.version>3.5commons-lang3.version>
<ehcache.version>3.1.4ehcache.version>
<hibernate.version>5.0.12.Finalhibernate.version>
<servlet-api.version>3.1.0servlet-api.version>
<commons-collection4.version>4.1commons-collection4.version>
<springframework.oxm.version>4.3.9.RELEASEspringframework.oxm.version>
properties>
<modules>
<module>springcloud-eureka-servermodule>
<module>springcloud-eureka-server-hamodule>
<module>springcloud-provider-user-servicemodule>
<module>springcloud-consumer-h5-ribbon-hystrixmodule>
<module>springcloud-consumer-h5-feignmodule>
<module>springcloud-api-gatewaymodule>
<module>springcloud-consumer-h5module>
<module>springcloud-config-servermodule>
modules>
<dependencies>
<dependency>
<groupId>org.springframework.cloudgroupId>
<artifactId>spring-cloud-starter-eureka-serverartifactId>
dependency>
<dependency>
<groupId>org.springframework.bootgroupId>
<artifactId>spring-boot-starter-actuatorartifactId>
dependency>
<dependency>
<groupId>org.springframework.bootgroupId>
<artifactId>spring-boot-starter-testartifactId>
<scope>testscope>
dependency>
<dependency>
<groupId>mysqlgroupId>
<artifactId>mysql-connector-javaartifactId>
<scope>runtimescope>
dependency>
<dependency>
<groupId>com.alibabagroupId>
<artifactId>druidartifactId>
<version>${druid.version}version>
dependency>
<dependency>
<groupId>javax.servletgroupId>
<artifactId>javax.servlet-apiartifactId>
<version>${servlet-api.version}version>
dependency>
<dependency>
<groupId>com.fasterxml.jackson.coregroupId>
<artifactId>jackson-annotationsartifactId>
<version>${jackson.version}version>
dependency>
<dependency>
<groupId>org.apache.commonsgroupId>
<artifactId>commons-lang3artifactId>
<version>${commons-lang3.version}version>
dependency>
<dependency>
<groupId>org.apache.commonsgroupId>
<artifactId>commons-collections4artifactId>
<version>${commons-collection4.version}version>
dependency>
<dependency>
<groupId>org.hibernategroupId>
<artifactId>hibernate-ehcacheartifactId>
<version>${hibernate.version}version>
dependency>
<dependency>
<groupId>org.ehcachegroupId>
<artifactId>ehcacheartifactId>
<version>${ehcache.version}version>
dependency>
<dependency>
<groupId>org.springframeworkgroupId>
<artifactId>spring-oxmartifactId>
<version>${springframework.oxm.version}version>
dependency>
dependencies>
<dependencyManagement>
<dependencies>
<dependency>
<groupId>org.springframework.cloudgroupId>
<artifactId>spring-cloud-dependenciesartifactId>
<version>${spring-cloud.version}version>
<type>pomtype>
<scope>importscope>
dependency>
dependencies>
dependencyManagement>
project>
模块则借助IntelliJ IDEA结合Spring Initializer自动生成工程结构,主要模块和说明如下:
模块名称 | 模块说明 | 访问地址 |
---|---|---|
springcloud-eureka-server | 分布式服务注册中心(单点) | http://127.0.0.1:9999 |
springcloud-eureka-server-ha | 分布式服务注册中心(高可用版本) | http://127.0.0.1:9998 http://127.0.0.1:9997 |
springcloud-provider-user-service | 用户服务提供者 | http://127.0.0.1:9996/list http://127.0.0.1:9995/list |
springcloud-consumer-h5 | 用户服务调用者,采用原始的RestTemplate调用 | http://127.0.0.1:9991/user/get/4 |
springcloud-consumer-h5-ribbon-hystrix | 用户服务调用者,采用ribbon做客户端负载均衡 | http://127.0.0.1:9994/springcloud-provider-user-service |
springcloud-consumer-h5-feign | feign声明式服务调用者 | http://127.0.0.1:9993/list |
springcloud-gateway | 网关服务 | http://127.0.0.1:9992/api-a/list |
springcloud-config-server | 配置中心 | 待定 |
所属maven模块:springcloud-provider-user-service
基于SpringBoot的Web和JPA模块实现Restful API的常用方法
主要包含User,Role,Department三个实体
Role.java
package com.ekeyfund.springcloud.entity;
import javax.persistence.*;
import java.io.Serializable;
/**
* Role Entity
*
* @author Liuguanglei [email protected]
* @create 2017-06-下午2:36
*/
@Entity
@Table(name = "springboot_role")
public class Role implements Serializable{
@Id
@GeneratedValue(strategy = GenerationType.IDENTITY)
@Column(name = "role_id")
private Long id;
@Column(name = "role_name")
private String name;
public Long getId() {
return id;
}
public void setId(Long id) {
this.id = id;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
@Override
public String toString() {
return new org.apache.commons.lang3.builder.ToStringBuilder(this)
.append("id", id)
.append("name", name)
.toString();
}
}
Department.java
package com.ekeyfund.springcloud.entity;
import org.apache.commons.lang3.builder.ToStringBuilder;
import org.hibernate.annotations.CacheConcurrencyStrategy;
import javax.persistence.*;
import java.io.Serializable;
/**
* Department Entity
*
* @author Liuguanglei [email protected]
* @create 2017-06-下午2:31
*/
@Entity
@Table(name = "springboot_department")
@org.hibernate.annotations.Cache(usage = CacheConcurrencyStrategy.NONSTRICT_READ_WRITE)
public class Department implements Serializable {
@Id
@GeneratedValue(strategy = GenerationType.IDENTITY)
@Column(name = "department_id")
private Long id;
@Column(name = "department_name")
private String name;
public Long getId() {
return id;
}
public void setId(Long id) {
this.id = id;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
@Override
public String toString() {
return new ToStringBuilder(this)
.append("id", id)
.append("name", name)
.toString();
}
}
User.java
package com.ekeyfund.springcloud.entity;
import com.fasterxml.jackson.annotation.JsonBackReference;
import org.apache.commons.lang3.builder.ToStringBuilder;
import org.springframework.format.annotation.DateTimeFormat;
import javax.persistence.*;
import java.io.Serializable;
import java.util.Date;
import java.util.List;
/**
* User Entity
*
* @author Liuguanglei [email protected]
* @create 2017-06-下午2:32
*/
@Entity
@Table(name = "springboot_user")
public class User implements Serializable{
@Id
@Column(name = "user_id")
@GeneratedValue(strategy = GenerationType.IDENTITY)
private Long id;
@Column(name = "user_name")
private String name;
@Column(name = "user_password")
private String password;
@Column(name = "user_create_date")
@DateTimeFormat(pattern = "yyyy-MM-dd HH:mm:ss")
private Date createDate;
@ManyToOne
@JoinColumn(name = "department_id")
@JsonBackReference
private Department department;
@ManyToMany(cascade = {},fetch = FetchType.EAGER)
@JoinTable(name = "springboot_user_role",joinColumns = {@JoinColumn(name="user_id")},
inverseJoinColumns = {@JoinColumn(name = "role_id")}
)
private List roleList;
public Long getId() {
return id;
}
public void setId(Long id) {
this.id = id;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public String getPassword() {
return password;
}
public void setPassword(String password) {
this.password = password;
}
public Date getCreateDate() {
return createDate;
}
public void setCreateDate(Date createDate) {
this.createDate = createDate;
}
public Department getDepartment() {
return department;
}
public void setDepartment(Department department) {
this.department = department;
}
public List getRoleList() {
return roleList;
}
public void setRoleList(List roleList) {
this.roleList = roleList;
}
@Override
public String toString() {
return new ToStringBuilder(this)
.append("id", id)
.append("name", name)
.append("password", password)
.append("createDate", createDate)
.append("department", department)
.append("roleList", roleList)
.toString();
}
}
主要包含UserRepository和DepartmentRepository
DepartmentRepository.java
package com.ekeyfund.springcloud.repository;
import com.ekeyfund.springcloud.entity.Department;
import org.springframework.data.jpa.repository.JpaRepository;
import org.springframework.stereotype.Repository;
/**
* Created by tony on 2017/6/19.
*/
@Repository
public interface DepartmentRepository extends JpaRepository {
}
UserRepoistory.java
package com.ekeyfund.springcloud.repository;
import com.ekeyfund.springcloud.entity.User;
import org.springframework.data.jpa.repository.JpaRepository;
import org.springframework.stereotype.Repository;
import java.util.Collection;
import java.util.Date;
import java.util.List;
/**
* User Repository
*
* @author Liuguanglei liuguanglei@ekeyfund.com
* @create 2017-06-下午2:54
*/
@Repository
public interface UserRepository extends JpaRepository{
/**
* and
* @param id
* @param name
* @return
*/
User findByIdAndName(Long id, String name);
User findByNameAndPassword(String name, String password);
/**
* or
* @param id
* @param name
* @return
*/
User findByIdOrName(Long id, String name);
/**
* between
* @param start
* @param end
* @return
*/
List findByCreateDateBetween(Date start, Date end);
/**
* lessThan
* @param start
* @return
*/
List getByCreateDateLessThan(Date start);
/**
* Greater Than
* @param start
* @return
*/
List findByCreateDateGreaterThan(Date start);
/**
* is null
* @return
*/
List findByNameIsNull();
/**
* in
* @param nameList
* @return
*/
List findByNameIn(Collection nameList);
}
主要包含UserService,DepartmentService及其实现
UserService.java
package com.ekeyfund.springcloud.service;
import com.ekeyfund.springcloud.entity.User;
import java.util.List;
/**
* Created by tony on 2017/6/19.
*/
public interface UserService {
/**
* 登录
* @param name
* @param password
* @return
*/
public User login(String name, String password);
/**
* 注册
* @param user
* @return
*/
public User register(User user);
/**
* 注销
* @param user
* @return
*/
void writeOff(User user);
/**
* 当前用户是否已经存在
* @param user
* @return
*/
boolean isExists(User user);
List getAllUser();
User getUserById(Long id);
}
UserServiceImpl.java
package com.ekeyfund.springcloud.service.impl;
import com.ekeyfund.springcloud.entity.User;
import com.ekeyfund.springcloud.repository.UserRepository;
import com.ekeyfund.springcloud.service.UserService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import javax.transaction.Transactional;
import java.util.List;
/**
* User Service Impl
*
* @author Liuguanglei [email protected]
* @create 2017-06-下午3:34
*/
@Service
@Transactional
public class UserServiceImpl implements UserService {
@Autowired
private UserRepository userRepository;
@Override
public User login(String name, String password) {
return userRepository.findByNameAndPassword(name,password);
}
@Override
public User register(User user) {
return userRepository.save(user);
}
@Override
public void writeOff(User user) {
userRepository.delete(user);
}
@Override
public boolean isExists(User user) {
return userRepository.findOne(user.getId())!=null?true:false;
}
@Override
public List getAllUser() {
return userRepository.findAll();
}
@Override
public User getUserById(Long id) {
return userRepository.findOne(id);
}
}
DepartmentService.java
package com.ekeyfund.springcloud.service;
import com.ekeyfund.springcloud.entity.Department;
/**
* Created by tony on 2017/6/19.
*/
public interface DepartmentService {
Department saveDepartment(Department department);
Department getDepartmentById(Long id);
}
DepartmentServiceImpl.java
package com.ekeyfund.springcloud.service.impl;
import com.ekeyfund.springcloud.entity.Department;
import com.ekeyfund.springcloud.repository.DepartmentRepository;
import com.ekeyfund.springcloud.service.DepartmentService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import javax.transaction.Transactional;
/**
* Department Impl
*
* @author Liuguanglei [email protected]
* @create 2017-06-下午3:12
*/
@Transactional
@Service
public class DepartmentImpl implements DepartmentService {
@Autowired
private DepartmentRepository departmentRepository;
@Override
public Department saveDepartment(Department department) {
return departmentRepository.save(department);
}
@Override
public Department getDepartmentById(Long id) {
return departmentRepository.findOne(id);
}
}
主要包含提供User完整的Restful API 的UserController
UserController.java
package com.ekeyfund.springcloud.controller;
import com.ekeyfund.springcloud.entity.User;
import com.ekeyfund.springcloud.service.UserService;
import org.slf4j.LoggerFactory;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.cloud.client.ServiceInstance;
import org.springframework.cloud.client.discovery.DiscoveryClient;
import org.springframework.web.bind.annotation.*;
import java.util.Date;
import java.util.List;
/**
* UserController
* Restful API
* @author Liuguanglei [email protected]
* @create 2017-06-下午11:24
*/
@RestController
public class UserController {
private static final org.slf4j.Logger LOGGER = LoggerFactory.getLogger(UserController.class);
@Autowired
private DiscoveryClient discoveryClient;
@Autowired
private UserService userService;
@GetMapping(value = "/list")
public List list(){
ServiceInstance instance=discoveryClient.getLocalServiceInstance();
LOGGER.info("call user/list service host is "+instance.getHost()+"service_id is "+instance.getServiceId());
return userService.getAllUser();
}
@GetMapping(value = "/login")
public User login( @RequestParam String name,@RequestParam String password){
User user=userService.login(name,password);
return user;
}
@PostMapping("/register")
public String register(@ModelAttribute User user){
User result =userService.register(user);
return result!=null?"success":"fail";
}
@GetMapping("/get/{id}")
public User get(@PathVariable Long id){
return userService.getUserById(id);
}
@PutMapping("/update/{id}")
public String update(@PathVariable Long id,@ModelAttribute User user){
User updatedUser =userService.getUserById(id);
updatedUser.setName(user.getName());
updatedUser.setPassword(user.getPassword());
updatedUser.setCreateDate(new Date());
User result= userService.register(updatedUser);
return result!=null?"success":"fail";
}
@DeleteMapping("/delete/{id}")
public String delete(@PathVariable Long id){
User user =new User();
user.setId(id);
userService.writeOff(user);
return "success";
}
}
主要包含数据源Druid和JPA的配置
DruidConfiguation.java
package com.ekeyfund.springcloud.configuration;
import com.alibaba.druid.support.http.StatViewServlet;
import com.alibaba.druid.support.http.WebStatFilter;
import org.springframework.boot.web.servlet.FilterRegistrationBean;
import org.springframework.boot.web.servlet.ServletRegistrationBean;
import org.springframework.context.annotation.Bean;
/**
* Druid Configuration
*
* @author Liuguanglei [email protected]
* @create 2017-06-下午5:48
*/
public class DruidConfiguration {
@Bean
public ServletRegistrationBean statViewServle(){
ServletRegistrationBean servletRegistrationBean = new ServletRegistrationBean(new StatViewServlet(),"/druid/*");
//白名单:
servletRegistrationBean.addInitParameter("allow","192.168.1.218,127.0.0.1");
//IP黑名单 (存在共同时,deny优先于allow) : 如果满足deny的即提示:Sorry, you are not permitted to view this page.
servletRegistrationBean.addInitParameter("deny","192.168.1.100");
//登录查看信息的账号密码.
servletRegistrationBean.addInitParameter("loginUsername","druid");
servletRegistrationBean.addInitParameter("loginPassword","12345678");
//是否能够重置数据.
servletRegistrationBean.addInitParameter("resetEnable","false");
return servletRegistrationBean;
}
@Bean
public FilterRegistrationBean statFilter(){
FilterRegistrationBean filterRegistrationBean = new FilterRegistrationBean(new WebStatFilter());
//添加过滤规则.
filterRegistrationBean.addUrlPatterns("/*");
//添加不需要忽略的格式信息.
filterRegistrationBean.addInitParameter("exclusions","*.js,*.gif,*.jpg,*.png,*.css,*.ico,/druid/*");
return filterRegistrationBean;
}
}
JPAPersistenceConfiguration
package com.ekeyfund.springcloud.configuration;
import com.alibaba.druid.pool.DruidDataSource;
import org.slf4j.LoggerFactory;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.boot.autoconfigure.domain.EntityScan;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.core.Ordered;
import org.springframework.core.annotation.Order;
import org.springframework.dao.annotation.PersistenceExceptionTranslationPostProcessor;
import org.springframework.data.jpa.repository.config.EnableJpaRepositories;
import org.springframework.orm.jpa.JpaTransactionManager;
import org.springframework.orm.jpa.LocalContainerEntityManagerFactoryBean;
import org.springframework.orm.jpa.vendor.HibernateJpaDialect;
import org.springframework.orm.jpa.vendor.HibernateJpaVendorAdapter;
import org.springframework.transaction.PlatformTransactionManager;
import org.springframework.transaction.annotation.EnableTransactionManagement;
import javax.persistence.EntityManagerFactory;
import javax.sql.DataSource;
import java.sql.SQLException;
import java.util.Properties;
/**
* JPA Persistence Configuration
*
* @author Liuguanglei [email protected]
* @create 2017-06-上午11:26
*/
@Order(Ordered.HIGHEST_PRECEDENCE)
@Configuration
@EnableTransactionManagement(proxyTargetClass = true) //启用JPA的事务管理
@EnableJpaRepositories(basePackages = "com.ekeyfund.springcloud.repository" )//启用JPA资源库并指定资源库接口位置
@EntityScan(basePackages = "com.ekeyfund.springcloud.entity")//指定实体的位置
public class JPAPersistenceConfiguration {
private static final org.slf4j.Logger LOGGER = LoggerFactory.getLogger(JPAPersistenceConfiguration.class);
/*******************数据库和连接池配置信息,读取application.properties文件的属性值****************************/
@Value("${spring.datasource.driver-class-name}")
private String driverClass;
@Value("${spring.datasource.username}")
private String userName;
@Value("${spring.datasource.password}")
private String password;
@Value("${spring.datasource.url}")
private String url;
@Value("${spring.datasource.initialSize}")
private int initialSize;
@Value("${spring.datasource.minIdle}")
private int minIdle;
@Value("${spring.datasource.maxActive}")
private int maxActive;
@Value("${spring.datasource.maxWait}")
private long maxWait;
@Value("${spring.datasource.timeBetweenEvictionRunsMillis}")
private long timeBetweenEvictionRunsMillis;
@Value("${spring.datasource.minEvictableIdleTimeMillis}")
private long minEvictableIdleTimeMillis;
@Value("${spring.datasource.filters}")
private String filters;
@Value("${spring.datasource.connectionProperties}")
private String connectionProperties;
@Bean(name = "druidDataSource",initMethod = "init",destroyMethod = "close")
public DataSource dataSource(){
DruidDataSource druidDataSource =new DruidDataSource();
druidDataSource.setDriverClassName(driverClass);
druidDataSource.setUsername(userName);
druidDataSource.setPassword(password);
druidDataSource.setUrl(url);
druidDataSource.setInitialSize(initialSize);
druidDataSource.setMinIdle(minIdle);
druidDataSource.setMaxActive(maxActive);
druidDataSource.setMaxWait(maxWait);
druidDataSource.setTimeBetweenEvictionRunsMillis(timeBetweenEvictionRunsMillis);
druidDataSource.setMinEvictableIdleTimeMillis(minEvictableIdleTimeMillis);
druidDataSource.setConnectionProperties(connectionProperties);
try {
druidDataSource.setFilters(filters);
} catch (SQLException e) {
LOGGER.error("build datasoure exception ",e.getMessage());
}
return druidDataSource;
}
@Bean(name = "entityManagerFactory")
public LocalContainerEntityManagerFactoryBean entityManagerFactory(DataSource druidDataSource){
LocalContainerEntityManagerFactoryBean localContainerEntityManagerFactoryBean =new LocalContainerEntityManagerFactoryBean();
localContainerEntityManagerFactoryBean.setDataSource(druidDataSource);
localContainerEntityManagerFactoryBean.setPackagesToScan("com.ekeyfund.springcloud.entity");
localContainerEntityManagerFactoryBean.setJpaProperties(buildHibernateProperties());
localContainerEntityManagerFactoryBean.setJpaDialect(new HibernateJpaDialect());
localContainerEntityManagerFactoryBean.setJpaVendorAdapter(new HibernateJpaVendorAdapter(){
{
setDatabase(org.springframework.orm.jpa.vendor.Database.MYSQL);
setDatabasePlatform("org.hibernate.dialect.MySQL5Dialect");
}
});
return localContainerEntityManagerFactoryBean;
}
@Bean
public PlatformTransactionManager transactionManager(DataSource druidDataSource, EntityManagerFactory entityManagerFactory){
JpaTransactionManager jpaTransactionManager=new JpaTransactionManager();
jpaTransactionManager.setDataSource(druidDataSource);
jpaTransactionManager.setEntityManagerFactory(entityManagerFactory);
return jpaTransactionManager;
}
@Bean
PersistenceExceptionTranslationPostProcessor persistenceExceptionTranslationPostProcessor(){
return new PersistenceExceptionTranslationPostProcessor();
}
protected Properties buildHibernateProperties(){
Properties hibernateProperties =new Properties();
hibernateProperties.setProperty("hibernate.dialect", "org.hibernate.dialect.MySQL5Dialect");
hibernateProperties.setProperty("hibernate.hbm2ddl.auto","update");
hibernateProperties.setProperty("hibernate.show_sql", "false");
hibernateProperties.setProperty("hibernate.use_sql_comments", "false");
hibernateProperties.setProperty("hibernate.format_sql", "true");
hibernateProperties.setProperty("hibernate.generate_statistics", "false");
hibernateProperties.setProperty("javax.persistence.validation.mode", "none");
//Audit History flags
hibernateProperties.setProperty("org.hibernate.envers.store_data_at_delete", "true");
hibernateProperties.setProperty("org.hibernate.envers.global_with_modified_flag", "true");
hibernateProperties.setProperty("hibernate.cache.use_second_level_cache", "true");
hibernateProperties.setProperty("hibernate.cache.region.factory_class", "org.hibernate.cache.ehcache.EhCacheRegionFactory");
hibernateProperties.setProperty("hibernate.cache.use_query_cache", "true");
return hibernateProperties;
}
}
主要包含springboot的application.properties,logback的logback-spring.xml以及缓存框架的ehcache.xml
application.propeties
##DataSource Config
##\u6570\u636e\u5e93\u8fde\u63a5\u6c60\u4fe1\u606f\u914d\u7f6e
spring.datasource.type=com.alibaba.druid.pool.DruidDataSource
spring.datasource.driver-class-name=com.mysql.jdbc.Driver
spring.datasource.url=jdbc:mysql://127.0.0.1:3306/springboot?characterEncoding=utf-8
spring.datasource.username=root
spring.datasource.password=guanglei
# \u4e0b\u9762\u4e3a\u8fde\u63a5\u6c60\u7684\u8865\u5145\u8bbe\u7f6e\uff0c\u5e94\u7528\u5230\u4e0a\u9762\u6240\u6709\u6570\u636e\u6e90\u4e2d
# \u521d\u59cb\u5316\u5927\u5c0f\uff0c\u6700\u5c0f\uff0c\u6700\u5927
spring.datasource.initialSize=5
spring.datasource.minIdle=5
spring.datasource.maxActive=20
# \u914d\u7f6e\u83b7\u53d6\u8fde\u63a5\u7b49\u5f85\u8d85\u65f6\u7684\u65f6\u95f4
spring.datasource.maxWait=60000
# \u914d\u7f6e\u95f4\u9694\u591a\u4e45\u624d\u8fdb\u884c\u4e00\u6b21\u68c0\u6d4b\uff0c\u68c0\u6d4b\u9700\u8981\u5173\u95ed\u7684\u7a7a\u95f2\u8fde\u63a5\uff0c\u5355\u4f4d\u662f\u6beb\u79d2
spring.datasource.timeBetweenEvictionRunsMillis=60000
# \u914d\u7f6e\u4e00\u4e2a\u8fde\u63a5\u5728\u6c60\u4e2d\u6700\u5c0f\u751f\u5b58\u7684\u65f6\u95f4\uff0c\u5355\u4f4d\u662f\u6beb\u79d2
spring.datasource.minEvictableIdleTimeMillis=300000
spring.datasource.validationQuery=SELECT 1 FROM DUAL
spring.datasource.testWhileIdle=true
spring.datasource.testOnBorrow=false
spring.datasource.testOnReturn=false
# \u6253\u5f00PSCache\uff0c\u5e76\u4e14\u6307\u5b9a\u6bcf\u4e2a\u8fde\u63a5\u4e0aPSCache\u7684\u5927\u5c0f
spring.datasource.poolPreparedStatements=true
spring.datasource.maxPoolPreparedStatementPerConnectionSize=20
# \u914d\u7f6e\u76d1\u63a7\u7edf\u8ba1\u62e6\u622a\u7684filters\uff0c\u53bb\u6389\u540e\u76d1\u63a7\u754c\u9762sql\u65e0\u6cd5\u7edf\u8ba1\uff0c'wall'\u7528\u4e8e\u9632\u706b\u5899
spring.datasource.filters=stat,wall,log4j
# \u901a\u8fc7connectProperties\u5c5e\u6027\u6765\u6253\u5f00mergeSql\u529f\u80fd\uff1b\u6162SQL\u8bb0\u5f55
spring.datasource.connectionProperties=druid.stat.mergeSql=true;druid.stat.slowSqlMillis=5000
# \u5408\u5e76\u591a\u4e2aDruidDataSource\u7684\u76d1\u63a7\u6570\u636e
#spring.datasource.useGlobalDataSourceStat=true
# druid \u8bbf\u95ee\u5730\u5740 http://host:port/druid/index.html
##Log Config
logging.config=classpath:logback-spring.xml
## SpringData JPA Config
spring.jpa.database=mysql
spring.jpa.show-sql=true
spring.jpa.hibernate.ddl-auto=update
spring.jpa.generate-ddl=true
server.port=9996
ehcache.xml
-- Sets the path to the directory where cache .data files are created.
If the path is a Java System Property it is replaced by
its value in the running VM.
The following properties are translated:
user.home - User's home directory
user.dir - User's current working directory
java.io.tmpdir - Default temp file path -->
--
指定一个目录:当 EHCache 把数据写到硬盘上时, 将把数据写到这个目录下.
-->
"tempDirectory"/>
--Default Cache configuration. These will applied to caches programmatically created through
the CacheManager.
The following attributes are required for defaultCache:
maxInMemory - Sets the maximum number of objects that will be created in memory
eternal - Sets whether elements are eternal. If eternal, timeouts are ignored and the element
is never expired.
timeToIdleSeconds - Sets the time to idle for an element before it expires. Is only used
if the element is not eternal. Idle time is now - last accessed time
timeToLiveSeconds - Sets the time to live for an element before it expires. Is only used
if the element is not eternal. TTL is now - creation time
overflowToDisk - Sets whether elements can overflow to disk when the in-memory cache
has reached the maxInMemory limit.
-->
--
设置缓存的默认数据过期策略
-->
"10000"
eternal="false"
timeToIdleSeconds="120"
timeToLiveSeconds="120"
overflowToDisk="true"
/>
--
设定具体的命名缓存的数据过期策略。每个命名缓存代表一个缓存区域
缓存区域(region):一个具有名称的缓存块,可以给每一个缓存块设置不同的缓存策略。
如果没有设置任何的缓存区域,则所有被缓存的对象,都将使用默认的缓存策略。即:
Hibernate 在不同的缓存区域保存不同的类/集合。
对于类而言,区域的名称是类名。如:com.ekeyfund.springboot.jpa.entity.User
对于集合而言,区域的名称是类名加属性名。如com.ekeyfund.springboot.jpa.entity.User.roleList
-->
--
name: 设置缓存的名字,它的取值为类的全限定名或类的集合的名字
maxElementsInMemory: 设置基于内存的缓存中可存放的对象最大数目
eternal: 设置对象是否为永久的, true表示永不过期,
此时将忽略timeToIdleSeconds 和 timeToLiveSeconds属性; 默认值是false
timeToIdleSeconds:设置对象空闲最长时间,以秒为单位, 超过这个时间,对象过期。
当对象过期时,EHCache会把它从缓存中清除。如果此值为0,表示对象可以无限期地处于空闲状态。
timeToLiveSeconds:设置对象生存最长时间,超过这个时间,对象过期。
如果此值为0,表示对象可以无限期地存在于缓存中. 该属性值必须大于或等于 timeToIdleSeconds 属性值
overflowToDisk:设置基于内存的缓存中的对象数目达到上限后,是否把溢出的对象写到基于硬盘的缓存中
-->
name="com.ekeyfund.springcloud.entity.Department"
maxElementsInMemory="1"
eternal="false"
timeToIdleSeconds="300"
timeToLiveSeconds="600"
overflowToDisk="true"
/>
name="com.ekeyfund.springcloud.entity.User"
maxElementsInMemory="1000"
eternal="true"
timeToIdleSeconds="0"
timeToLiveSeconds="0"
overflowToDisk="false"
/>
name="com.ekeyfund.springcloud.entity.Role"
maxElementsInMemory="1000"
eternal="true"
timeToIdleSeconds="0"
timeToLiveSeconds="0"
overflowToDisk="false"
/>
logback.xml
<configuration>
<property name="APP_ID" value="SpringCloud-Provider-User-Service"/>
<property name="LOG_PATH" value="logs">property>
<appender name="STDOUT" class="ch.qos.logback.core.ConsoleAppender">
<encoder>
<pattern>%d{yyyy-MM-dd HH:mm:ss} %-4relative [%thread] %-5level %logger{35} - %msg %npattern>
encoder>
appender>
<appender name="FILE_LOG"
class="ch.qos.logback.core.rolling.RollingFileAppender">
<filter class="ch.qos.logback.classic.filter.LevelFilter">
<level>DEBUGlevel>
filter>
<file>${LOG_PATH}/${APP_ID}/access.logfile>
<rollingPolicy class="ch.qos.logback.core.rolling.TimeBasedRollingPolicy">
<fileNamePattern>${LOG_PATH}/${APP_ID}/access.log.%d{yyyy-MM-dd}.zip
fileNamePattern>
<maxHistory>10maxHistory>
rollingPolicy>
<encoder>
<pattern>%d{yyyy-MM-dd HH:mm:ss} %-4relative [%thread] %-5level %logger{35} - %msg%npattern>
encoder>
appender>
<appender name="FILE_DEBUG"
class="ch.qos.logback.core.rolling.RollingFileAppender">
<filter class="ch.qos.logback.classic.filter.LevelFilter">
<level>DEBUGlevel>
<onMatch>ACCEPTonMatch>
<onMismatch>DENYonMismatch>
filter>
<file>${LOG_PATH}/${APP_ID}/access_debug.logfile>
<rollingPolicy class="ch.qos.logback.core.rolling.TimeBasedRollingPolicy">
<fileNamePattern>${LOG_PATH}/${APP_ID}/access_debug.log.%d{yyyy-MM-dd}.zip
fileNamePattern>
<maxHistory>10maxHistory>
rollingPolicy>
<encoder>
<pattern>%d{yyyy-MM-dd HH:mm:ss} %-4relative [%thread] %-5level %logger{35} - %msg%npattern>
encoder>
appender>
<appender name="FILE_INFO"
class="ch.qos.logback.core.rolling.RollingFileAppender">
<filter class="ch.qos.logback.classic.filter.LevelFilter">
<level>INFOlevel>
<onMatch>ACCEPTonMatch>
<onMismatch>DENYonMismatch>
filter>
<file>${LOG_PATH}/${APP_ID}/access_info.logfile>
<rollingPolicy class="ch.qos.logback.core.rolling.TimeBasedRollingPolicy">
<fileNamePattern>${LOG_PATH}/${APP_ID}/access_info.log.%d{yyyy-MM-dd}.zip
fileNamePattern>
<maxHistory>10maxHistory>
rollingPolicy>
<encoder>
<pattern>%d{yyyy-MM-dd HH:mm:ss} %-4relative [%thread] %-5level %logger{35} - %msg%npattern>
encoder>
appender>
<appender name="FILE_WARN"
class="ch.qos.logback.core.rolling.RollingFileAppender">
<filter class="ch.qos.logback.classic.filter.LevelFilter">
<level>WARNlevel>
<onMatch>ACCEPTonMatch>
<onMismatch>DENYonMismatch>
filter>
<file>${LOG_PATH}/${APP_ID}/access_warn.logfile>
<rollingPolicy class="ch.qos.logback.core.rolling.TimeBasedRollingPolicy">
<fileNamePattern>${LOG_PATH}/${APP_ID}/access_warn.log.%d{yyyy-MM-dd}.zip
fileNamePattern>
<maxHistory>10maxHistory>
rollingPolicy>
<encoder>
<pattern>%d{yyyy-MM-dd HH:mm:ss} %-4relative [%thread] %-5level %logger{35} - %msg%npattern>
encoder>
appender>
<appender name="FILE_ERROR"
class="ch.qos.logback.core.rolling.RollingFileAppender">
<filter class="ch.qos.logback.classic.filter.LevelFilter">
<level>ERRORlevel>
<onMatch>ACCEPTonMatch>
<onMismatch>DENYonMismatch>
filter>
<file>${LOG_PATH}/${APP_ID}/access_error.logfile>
<rollingPolicy class="ch.qos.logback.core.rolling.TimeBasedRollingPolicy">
<fileNamePattern>${LOG_PATH}/${APP_ID}/access_error.log.%d{yyyy-MM-dd}.zip
fileNamePattern>
<maxHistory>10maxHistory>
rollingPolicy>
<encoder>
<pattern>%d{yyyy-MM-dd HH:mm:ss} %-4relative [%thread] %-5level %logger{35} - %msg%npattern>
encoder>
appender>
<appender name="ASYNC_LOG" class="ch.qos.logback.classic.AsyncAppender">
<discardingThreshold>0discardingThreshold>
<queueSize>512queueSize>
<appender-ref ref="FILE_LOG"/>
appender>
<appender name="ASYNC_LOG" class="ch.qos.logback.classic.AsyncAppender">
<discardingThreshold>0discardingThreshold>
<queueSize>512queueSize>
<appender-ref ref="FILE_LOG"/>
appender>
<appender name="ASYNC_LOG_DEBUG" class="ch.qos.logback.classic.AsyncAppender">
<discardingThreshold>0discardingThreshold>
<queueSize>512queueSize>
<appender-ref ref="FILE_DEBUG"/>
appender>
<appender name="ASYNC_LOG_INFO" class="ch.qos.logback.classic.AsyncAppender">
<discardingThreshold>0discardingThreshold>
<queueSize>512queueSize>
<appender-ref ref="FILE_INFO"/>
appender>
<appender name="ASYNC_LOG_WARN" class="ch.qos.logback.classic.AsyncAppender">
<discardingThreshold>0discardingThreshold>
<queueSize>512queueSize>
<appender-ref ref="FILE_WARN"/>
appender>
<appender name="ASYNC_LOG_ERROR" class="ch.qos.logback.classic.AsyncAppender">
<discardingThreshold>0discardingThreshold>
<queueSize>512queueSize>
<appender-ref ref="FILE_ERROR"/>
appender>
<root level="INFO">
<appender-ref ref="STDOUT"/>
<appender-ref ref="ASYNC_LOG"/>
<appender-ref ref="ASYNC_LOG_DEBUG"/>
<appender-ref ref="ASYNC_LOG_INFO"/>
<appender-ref ref="ASYNC_LOG_WARN"/>
<appender-ref ref="ASYNC_LOG_ERROR"/>
root>
<logger name="org.springframework" level="INFO"/>
configuration>
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0modelVersion>
<artifactId>springcloud-provider-user-serviceartifactId>
<packaging>jarpackaging>
<name>springcloud-user-servicename>
<description>SpringCloud User Service Applicationdescription>
<parent>
<groupId>com.ekeyfund.springcloudgroupId>
<artifactId>springcloud-parentartifactId>
<version>2.0.0-SNAPSHOTversion>
<relativePath>../pom.xmlrelativePath>
parent>
<properties>
<start-class>com.ekeyfund.springcloud.SpringcloudUserServiceMasterApplicationstart-class>
properties>
<dependencies>
<dependency>
<groupId>org.springframework.bootgroupId>
<artifactId>spring-boot-starter-data-jpaartifactId>
dependency>
<dependency>
<groupId>org.springframework.bootgroupId>
<artifactId>spring-boot-starter-webartifactId>
dependency>
dependencies>
<build>
<plugins>
<plugin>
<groupId>org.springframework.bootgroupId>
<artifactId>spring-boot-maven-pluginartifactId>
<configuration>
<mainClass>${start-class}mainClass>
<layout>ZIPlayout>
configuration>
<executions>
<execution>
<goals>
<goal>repackagegoal>
goals>
execution>
executions>
plugin>
plugins>
build>
project>
package com.ekeyfund.springcloud;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.cloud.client.discovery.EnableDiscoveryClient;
//@EnableDiscoveryClient//激活Eureka中的DiscoveryClient实现(自动化配置,创建DiscoveryClient接口针对Eureka客户端的EurekaDiscoveryClient实例)
@SpringBootApplication
public class SpringcloudUserServiceMasterApplication {
public static void main(String[] args) {
SpringApplication.run(SpringcloudUserServiceMasterApplication.class, args);
}
}
package com.ekeyfund.springcloud;
import com.ekeyfund.springcloud.entity.Department;
import com.ekeyfund.springcloud.entity.User;
import com.ekeyfund.springcloud.service.DepartmentService;
import com.ekeyfund.springcloud.service.UserService;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.slf4j.LoggerFactory;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.boot.test.context.SpringBootTest;
import org.springframework.context.annotation.ComponentScan;
import org.springframework.test.context.junit4.SpringRunner;
import java.util.Date;
@RunWith(SpringRunner.class)
@SpringBootTest
@ComponentScan("com.ekeyfund.springcloud")
public class SpringcloudUserServiceApplicationTests {
private static final org.slf4j.Logger LOGGER = LoggerFactory.getLogger(SpringcloudUserServiceApplicationTests.class);
@Test
public void contextLoads() {
}
@Autowired
private DepartmentService departmentService;
@Autowired
private UserService userService;
@Test
public void testDepartmentService(){
Department department=new Department();
department.setName("dev");
Department result =departmentService.saveDepartment(department);
LOGGER.info("add result "+result);
Long id =1L;
result =departmentService.getDepartmentById(id);
LOGGER.info("get department "+result);
}
@Test
public void testUserRegister()throws Exception{
User user =new User();
user.setName("tony");
user.setPassword("666666");
user.setCreateDate(new Date());
Department department=departmentService.getDepartmentById(1L);
user.setDepartment(department);
User result =userService.register(user);
LOGGER.info("register result "+result);
}
@Test
public void testWriteOff()throws Exception{
User user =new User();
user.setName("tony");
user.setPassword("666666");
userService.writeOff(user);
}
@Test
public void testUserLogin()throws Exception{
User user =new User();
user.setName("tony");
user.setPassword("666666");
User result =userService.login(user.getName(),user.getPassword());
LOGGER.info("login "+result);
}
@Test
public void testUserIsExist()throws Exception{
User user =new User();
user.setId(4L);
boolean result =userService.isExists(user);
LOGGER.info("isExist "+result);
}
}
所属maven模块:springcloud-consumer-h5
主要包含User,Department,Role
Role.java
package com.ekeyfund.springcloud.entity;
/**
* Role Entity
*
* @author Liuguanglei [email protected]
* @create 2017-06-下午2:36
*/
public class Role {
private Long id;
private String name;
public Long getId() {
return id;
}
public void setId(Long id) {
this.id = id;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
@Override
public String toString() {
return new org.apache.commons.lang3.builder.ToStringBuilder(this)
.append("id", id)
.append("name", name)
.toString();
}
}
Department.java
package com.ekeyfund.springcloud.entity;
import org.apache.commons.lang3.builder.ToStringBuilder;
/**
* Department Entity
*
* @author Liuguanglei [email protected]
* @create 2017-06-下午2:31
*/
public class Department {
private Long id;
private String name;
public Long getId() {
return id;
}
public void setId(Long id) {
this.id = id;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
@Override
public String toString() {
return new ToStringBuilder(this)
.append("id", id)
.append("name", name)
.toString();
}
}
User.java
package com.ekeyfund.springcloud.entity;
import com.fasterxml.jackson.annotation.JsonBackReference;
import org.apache.commons.lang3.builder.ToStringBuilder;
import org.springframework.format.annotation.DateTimeFormat;
import java.util.Date;
import java.util.List;
/**
* User Entity
*
* @author Liuguanglei [email protected]
* @create 2017-06-下午2:32
*/
public class User {
private Long id;
private String name;
private String password;
@DateTimeFormat(pattern = "yyyy-MM-dd HH:mm:ss")
private Date createDate;
@JsonBackReference
private Department department;
private List roleList;
public Long getId() {
return id;
}
public void setId(Long id) {
this.id = id;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public String getPassword() {
return password;
}
public void setPassword(String password) {
this.password = password;
}
public Date getCreateDate() {
return createDate;
}
public void setCreateDate(Date createDate) {
this.createDate = createDate;
}
public Department getDepartment() {
return department;
}
public void setDepartment(Department department) {
this.department = department;
}
public List getRoleList() {
return roleList;
}
public void setRoleList(List roleList) {
this.roleList = roleList;
}
@Override
public String toString() {
return new ToStringBuilder(this)
.append("id", id)
.append("name", name)
.append("password", password)
.append("createDate", createDate)
.append("department", department)
.append("roleList", roleList)
.toString();
}
}
主要包含Spring MVC相关配置
MVCConfiguration.java
package com.ekeyfund.springcloud.configuration;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.http.MediaType;
import org.springframework.http.converter.HttpMessageConverter;
import org.springframework.http.converter.json.MappingJackson2HttpMessageConverter;
import org.springframework.web.client.RestTemplate;
import org.springframework.web.servlet.config.annotation.EnableWebMvc;
import org.springframework.web.servlet.config.annotation.WebMvcConfigurerAdapter;
import org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter;
import java.util.ArrayList;
import java.util.List;
@Configuration
@EnableWebMvc
public class MVCConfiguration extends WebMvcConfigurerAdapter{
/**
*
* @return
*/
@Bean
public RequestMappingHandlerAdapter requestMappingHandlerAdapter(){
RequestMappingHandlerAdapter requestMappingHandlerAdapter=new RequestMappingHandlerAdapter();
List> messageConverters =new ArrayList<>();
messageConverters.add(mappingJackson2HttpMessageConverter());
requestMappingHandlerAdapter.setMessageConverters(messageConverters);
return requestMappingHandlerAdapter;
}
//@Bean
public MappingJackson2HttpMessageConverter mappingJackson2HttpMessageConverter(){
MappingJackson2HttpMessageConverter mappingJackson2HttpMessageConverter =new MappingJackson2HttpMessageConverter();
List supportedMediaTypes =new ArrayList<>();
supportedMediaTypes.add(MediaType.APPLICATION_JSON_UTF8);
mappingJackson2HttpMessageConverter.setSupportedMediaTypes(supportedMediaTypes);
return mappingJackson2HttpMessageConverter;
}
@Bean
public RestTemplate restTemplate(){
RestTemplate restTemplate =new RestTemplate();
return restTemplate;
}
}
主要包含UserController
UserController.java
package com.ekeyfund.springcloud.controller;
import com.ekeyfund.springcloud.entity.User;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.RestController;
import org.springframework.web.client.RestTemplate;
/**
* UserController
*
* @author tony [email protected]
* @create 2017-06-27-下午11:42
* @see
* @since JDK1.8u133
*/
@RestController
public class UserController {
@Autowired
private RestTemplate restTemplate;
@GetMapping("user/get/{id}")
public User get(@PathVariable Long id){
return this.restTemplate.getForObject("http://127.0.0.1:9996/get/{1}",User.class,id);
}
}
主要包含springboot的application.properties
application.properties
server.port=9991
server.tomcat.uri-encoding=UTF-8
package com.ekeyfund.springcloud;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
@SpringBootApplication
public class SpringcloudConsumerH5Application {
public static void main(String[] args) {
SpringApplication.run(SpringcloudConsumerH5Application.class, args);
}
}
9991端口的服务消费者会调用9996端口的服务提供者接口。
通常在实际的开发中会遇到类似的情景:例如PC/H5/Android/IOS会去调用User模块的登录服务。
弊端:因为程序调用的IP和端口采用了硬编码,而IP和端口可能变更,因此难以维护。
而当服务提供者宕机后服务会不可用,后面会在系统中引入服务注册、发现组件,该组件主要是维护了一个服务注册表,服务提供者和消费者将服务注册到该注册表中,而服务注册和发现组件会通过发送心跳来判断服务是否可用。
所属maven模块:springcloud-eureka-server
1 pom.xml
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0modelVersion>
<groupId>com.ekeyfund.springcloudgroupId>
<artifactId>springcloud-eureka-serverartifactId>
<packaging>jarpackaging>
<name>springcloud-eureka-servername>
<description>SpringCloud Eureka Server description>
<parent>
<groupId>com.ekeyfund.springcloudgroupId>
<artifactId>springcloud-parentartifactId>
<version>2.0.0-SNAPSHOTversion>
<relativePath>../pom.xmlrelativePath>
parent>
<properties>
<start-class>com.ekeyfund.springcloud.SpringcloudEurekaServerApplicationstart-class>
properties>
project>
2 编写启动类,在启动类上添加@EnableEurekaServer注解,声明这是一个Eureka Server
package com.ekeyfund.springcloud;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.cloud.netflix.eureka.server.EnableEurekaServer;
/**
* 单点eureka server
*/
@EnableEurekaServer //启用Eureka Server
@SpringBootApplication
public class SpringcloudEurekaServerApplication {
public static void main(String[] args) {
SpringApplication.run(SpringcloudEurekaServerApplication.class, args);
}
}
3 在应用配置文件application.properties添加如下内容:
spring.application.name=springcloud-cureka-server
server.port=9999
eureka.instance.hostname=127.0.0.1
#定义注册中心的地址
eureka.client.serviceUrl.defaultZone=http://${eureka.instance.hostname}:${server.port}/eureka/
#不向注册中心注册自己
eureka.client.register-with-eureka=false
#注册中心的职责就是去维护服务实例,不需要去检索服务
eureka.client.fetch-registry=false
eureka.instance.prefer-ip-address=true
4 测试访问Eureka Server
运行SpringcloudEurekaServerApplication,在浏览器输入 http://127.0.0.1:9999即可以访问Eureka Server
所属maven模块 springcloud-provider-user-service
1 pom.xml
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0modelVersion>
<artifactId>springcloud-provider-user-serviceartifactId>
<packaging>jarpackaging>
<name>springcloud-user-servicename>
<description>SpringCloud User Service Applicationdescription>
<parent>
<groupId>com.ekeyfund.springcloudgroupId>
<artifactId>springcloud-parentartifactId>
<version>2.0.0-SNAPSHOTversion>
<relativePath>../pom.xmlrelativePath>
parent>
<properties>
<start-class>com.ekeyfund.springcloud.SpringcloudUserServiceMasterApplicationstart-class>
properties>
<dependencies>
<dependency>
<groupId>org.springframework.bootgroupId>
<artifactId>spring-boot-starter-data-jpaartifactId>
dependency>
<dependency>
<groupId>org.springframework.bootgroupId>
<artifactId>spring-boot-starter-webartifactId>
dependency>
<dependency>
<groupId>org.springframework.cloudgroupId>
<artifactId>spring-cloud-starter-eurekaartifactId>
dependency>
dependencies>
<build>
<plugins>
<plugin>
<groupId>org.springframework.bootgroupId>
<artifactId>spring-boot-maven-pluginartifactId>
<configuration>
<mainClass>${start-class}mainClass>
<layout>ZIPlayout>
configuration>
<executions>
<execution>
<goals>
<goal>repackagegoal>
goals>
execution>
executions>
plugin>
plugins>
build>
project>
2 在application.properties文件中添加以下配置:
#####Eureka Client Config#######
#设置服务名称
spring.application.name=springcloud-provider-user-service
#eureka 单实例配置
#eureka.client.service-url.defaultZone=http://127.0.0.1:9999/eureka
eureka.instance.prefer-ip-address=true
其中spring.application.name是指定注册到Eureka Server上的应用名称
eureka.instance.prefer-ip-address表示将自己的IP注册到Eureka Server
3 编写启动类,在启动类上添加@EnableDiscoveryClient注解,声明这是一个Eureka Client
package com.ekeyfund.springcloud;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.cloud.client.discovery.EnableDiscoveryClient;
@EnableDiscoveryClient//激活Eureka中的DiscoveryClient实现(自动化配置,创建DiscoveryClient接口针对Eureka客户端的EurekaDiscoveryClient实例)
@SpringBootApplication
public class SpringcloudUserServiceApplication {
public static void main(String[] args) {
SpringApplication.run(SpringcloudUserServiceMasterApplication.class, args);
}
}
4 测试服务注册
首先运行SpringcloudEurekaServerApplication,启动Eureka Server,然后启动SpringcloudUserServiceApplication,启动Eureka Client。
访问Eureka Server,效果如下图:
在生产环境中,如果Eureka Server所在的机器发生宕机,那么服务发现组件将会变得不可用,因此需要实现高可用。Eureka Server可以通过运行多个实例并相互注册的方式实现高可用部署,实例之间会彼此增量同步信息,从而保持所有节点的数据一致。
所属maven模块springcloud-eureka-server-ha
该模块使用了springboot的多环境配置特性来激活两个Eureka Server,因此准备了application.properties,application-master.properties和application-slave.properties三个配置文件
application.properties
spring.profiles.active=master
##使用ip地址的形式定义注册中心的地址
eureka.instance.prefer-ip-address=true
#禁用自我保护模式
#eureka.server.enable-self-preservation=false
###eureka server 启用安全验证
#security.user.name=tony
#security.user.password=666666
#security.basic.enabled=true
##服务续约任务的调用间隔时间默认为30s
#eureka.instance.lease-renewal-interval-in-seconds=3
###定义服务失效的时间默认是90s
#eureka.instance.lease-expiration-duration-in-seconds=540
application-master.properties
spring.application.name=springcloud-eureka-server-ha
server.port=9998
eureka.instance.hostname=127.0.0.1
eureka.client.serviceUrl.defaultZone=http://${eureka.instance.hostname}:9997/eureka/
application-slave.properties
spring.application.name=springcloud-eureka-server-ha
server.port=9997
eureka.instance.hostname=127.0.0.1
eureka.client.serviceUrl.defaultZone=http://${eureka.instance.hostname}:9998/eureka/
同时准备两个启动类用来启动两个Eureka Server
SpringcloudEurekaMasterServerApplication.java
package com.ekeyfund.springcloud;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.cloud.netflix.eureka.server.EnableEurekaServer;
@EnableEurekaServer
@SpringBootApplication
public class SpringcloudEurekaMasterServerApplication {
public static void main(String[] args) {
SpringApplication.run(SpringcloudEurekaMasterServerApplication.class, args);
}
}
SpringcloudEurekaSlaveServiceApplication.java
package com.ekeyfund.springcloud;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.cloud.netflix.eureka.server.EnableEurekaServer;
@EnableEurekaServer
@SpringBootApplication
public class SpringcloudEurekaSlaveServiceApplication {
public static void main(String[] args) {
SpringApplication.run(SpringcloudEurekaSlaveServiceApplication.class, args);
}
}
分别运行SpringcloudEurekaMasterServerApplication和SpringcloudEurekaSlaveServiceApplication后会发现两个注册中心已经完成相互注册
所属maven模块 springcloud-provider-user-service
服务提供者的服务注册只需要改变application.properties的注册地址即可
#####Eureka Client Config#######
#设置服务名称
spring.application.name=springcloud-provider-user-service
#指定服务注册中心的地址 ###高可用改造后可以加上多个注册中心的地址
eureka.client.service-url.defaultZone=http://127.0.0.1:9998/eureka/,http://127.0.0.1:9997/eureka/
eureka.instance.prefer-ip-address=true
#####Eureka Client Config#######
#指定服务提供者的端口
server.port=9996
刷新Eureka Server,查看高可用的Eureka Server
user服务同时注册在两个Eureka Server
默认情况下Eureka Server允许匿名访问,这里创建一个需要登录后才能访问Eureka Server
在pom.xml中添加安全依赖
<dependency>
<groupId>org.springframework.bootgroupId>
<artifactId>spring-boot-starter-securityartifactId>
dependency>
然后在application.properties中添加http basic验证配置
##eureka server 启用安全验证
security.user.name=tony
security.user.password=666666
security.basic.enabled=true
运行SpringcloudEurekaMasterServerApplication或者SpringcloudEurekaSlaveServerApplication后,访问Eureka Server需要提供用户名和密码才能访问
将服务注册到需要认证的Eureka Server,只需要将eureka.client.serviceUrl.defaultZone配置为http://user:[email protected]:9998/eureka/,http://user:[email protected]:9997/eureka/即可
例如 高可用Eureka Server的注册地址变更为
master
spring.application.name=springcloud-eureka-server-ha
server.port=9998
eureka.instance.hostname=127.0.0.1
eureka.client.serviceUrl.defaultZone=http://tony:666666@${eureka.instance.hostname}:9997/eureka/
slave
spring.application.name=springcloud-eureka-server-ha
server.port=9997
eureka.instance.hostname=127.0.0.1
eureka.client.serviceUrl.defaultZone=http://tony:666666@${eureka.instance.hostname}:9998/eureka/
所属maven模块:springcloud-consumer-h5-ribbon-hystrix
Ribbon是Netflix发布的负载均衡器,有助于控制HTTP和TCP客户端的行为,为Ribbon配置服务提供者地址列表后,Ribbon可以基于负载均衡算法(例如轮询、随机)自动的帮助消费者去请求。
在SpringCloud中,当Ribbon与Eureka配合使用时,Ribbon可自动从Eureka Server获取服务提供者地址列表,并基于负载均衡算法,请求其中一个服务提供者实例。
pom.xml
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0modelVersion>
<groupId>com.ekeyfund.springcloudgroupId>
<artifactId>springcloud-consumer-h5-ribbon-hystrixartifactId>
<packaging>jarpackaging>
<name>springcloud-consumer-h5-ribbon-hystrixname>
<description>Spring Cloud H5 Appliactiondescription>
<parent>
<groupId>com.ekeyfund.springcloudgroupId>
<artifactId>springcloud-parentartifactId>
<version>2.0.0-SNAPSHOTversion>
<relativePath>../pom.xmlrelativePath>
parent>
<properties>
<start-class>com.ekeyfund.springcloud.SpringcloudH5RibbonHystrixApplicationstart-class>
properties>
<dependencies>
<dependency>
<groupId>org.springframework.cloudgroupId>
<artifactId>spring-cloud-starter-ribbonartifactId>
dependency>
<dependency>
<groupId>org.springframework.cloudgroupId>
<artifactId>spring-cloud-starter-hystrixartifactId>
dependency>
<dependency>
<groupId>org.springframework.bootgroupId>
<artifactId>spring-boot-starter-webartifactId>
dependency>
<dependency>
<groupId>org.springframework.cloudgroupId>
<artifactId>spring-cloud-starter-eurekaartifactId>
dependency>
<dependency>
<groupId>com.fasterxml.jackson.coregroupId>
<artifactId>jackson-databindartifactId>
<version>2.8.8version>
dependency>
dependencies>
<dependencyManagement>
<dependencies>
<dependency>
<groupId>org.springframework.cloudgroupId>
<artifactId>spring-cloud-dependenciesartifactId>
<version>${spring-cloud.version}version>
<type>pomtype>
<scope>importscope>
dependency>
dependencies>
dependencyManagement>
<build>
<plugins>
<plugin>
<groupId>org.springframework.bootgroupId>
<artifactId>spring-boot-maven-pluginartifactId>
<configuration>
<mainClass>${start-class}mainClass>
<layout>ZIPlayout>
configuration>
<executions>
<execution>
<goals>
<goal>repackagegoal>
goals>
execution>
executions>
plugin>
plugins>
build>
project>
MVCConfiguration.java
package com.ekeyfund.springcloud.configuration;
import org.springframework.cloud.client.loadbalancer.LoadBalanced;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.http.converter.HttpMessageConverter;
import org.springframework.http.converter.json.MappingJackson2HttpMessageConverter;
import org.springframework.web.client.RestTemplate;
import org.springframework.web.servlet.config.annotation.EnableWebMvc;
import org.springframework.web.servlet.config.annotation.WebMvcConfigurerAdapter;
import org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter;
import java.util.ArrayList;
import java.util.List;
/**
* MVCConfiguration
*
* @author Liuguanglei [email protected]
* @create 2017-06-下午1:01
*/
@Configuration
@EnableWebMvc
public class MVCConfiguration extends WebMvcConfigurerAdapter{
@Bean
public MappingJackson2HttpMessageConverter mappingJackson2HttpMessageConverter(){
return new MappingJackson2HttpMessageConverter();
}
@Bean
public RequestMappingHandlerAdapter requestMappingHandlerAdapter(MappingJackson2HttpMessageConverter mappingJackson2HttpMessageConverter){
RequestMappingHandlerAdapter requestMappingHandlerAdapter=new RequestMappingHandlerAdapter();
List> messageConverters=new ArrayList<>();
messageConverters.add(mappingJackson2HttpMessageConverter);
requestMappingHandlerAdapter.setMessageConverters(messageConverters);
return requestMappingHandlerAdapter;
}
@Bean
@LoadBalanced//开启客户端负载均衡
public RestTemplate restTemplate(){
return new RestTemplate();
}
}
相比之前的配置主要是在RestTemplate中添加了@LoadBalanced注解即可整合Ribbon实现客户端的负载均衡。
UserController.java
package com.ekeyfund.springcloud.controller;
import com.netflix.hystrix.contrib.javanica.annotation.HystrixCommand;
import com.netflix.hystrix.contrib.javanica.annotation.HystrixProperty;
import com.ekeyfund.springcloud.entity.User;
import org.slf4j.LoggerFactory;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.cloud.client.ServiceInstance;
import org.springframework.cloud.client.loadbalancer.LoadBalancerClient;
import org.springframework.http.ResponseEntity;
import org.springframework.web.bind.annotation.*;
import org.springframework.web.client.RestTemplate;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.List;
/**
* User Controller
*
* @author Liuguanglei [email protected]
* @create 2017-06-上午12:55
*/
@RestController
public class UserController {
private static final org.slf4j.Logger LOGGER = LoggerFactory.getLogger(UserController.class);
@Autowired
private RestTemplate restTemplate;
@Autowired
private LoadBalancerClient loadBalancerClient;
@GetMapping("/login")
public User login(@RequestParam String name, @RequestParam String password){
LOGGER.info("call user service login method");
ResponseEntity responseEntity =this.restTemplate.getForEntity("http://SPRINGCLOUD-PROVIDER-USER-SERVICE/login?name={1},password={2}",User.class,name,password);
return responseEntity.getBody();
}
@GetMapping("/list")
public List list(){
User[] users=this.restTemplate.getForObject("http://SPRINGCLOUD-PROVIDER-USER-SERVICE/list",User[].class);
List userList = Arrays.asList(users);
return userList;
}
@GetMapping("user/get/{id}")
public User get(@PathVariable Long id){
return this.restTemplate.getForObject("http://SPRINGCLOUD-PROVIDER-USER-SERVICE/get/id={1}",User.class,id);
}
/**
* ribbon负载均衡测试方法
*/
@GetMapping("/log-user-service-instance")
public void logUserServiceInstance(){
ServiceInstance serviceInstance=this.loadBalancerClient.choose("springcloud-provider-user-service");
LOGGER.info("serviceInstance info ---> serviceId is "+serviceInstance.getServiceId()+" host is "+serviceInstance.getHost()+"port is "+serviceInstance.getPort() );
}
}
从UserController中的login,get和list方法可以看出,我们将请求地址变更为http://SPRINGCLOUD-PROVIDER-USER-SERVICE,而SPRINGCLOUD-PROVIDER-USER-SERVICE是用户微服务的虚拟主机名,当Ribbon和Eureka配合使用时,会自动将虚拟主机名映射城微服务的网络地址。
在新增的logUserServiceInstance方法中可以通过LoadBalancerClient的API更加直观的获取当前选择的用户微服务节点。
访问地址:http://127.0.0.1:9994/log-user-service-instance
观察控制台输出:
2017-06-29 11:26:39.112 INFO 13474 — [nio-9994-exec-7] c.e.s.controller.UserController : serviceInstance info —> serviceId is springcloud-provider-user-service host is 192.168.1.136port is 9996
2017-06-29 11:26:41.000 INFO 13474 — [nio-9994-exec-8] c.e.s.controller.UserController : serviceInstance info —> serviceId is springcloud-provider-user-service host is 192.168.1.136port is 9995
2017-06-29 11:26:42.126 INFO 13474 — [nio-9994-exec-1] c.e.s.controller.UserController : serviceInstance info —> serviceId is springcloud-provider-user-service host is 192.168.1.136port is 9996
2017-06-29 11:26:48.926 INFO 13474 — [nio-9994-exec-4] c.e.s.controller.UserController : serviceInstance info —> serviceId is springcloud-provider-user-service host is 192.168.1.136port is 9995
可以看到此时请求会均匀分布到两个不同用户微服务节点上,说明已经实现了负载均衡。
application.properties
spring.application.name=springcloud-consumer-h5-ribbon-hystrix
server.port=9994
eureka.client.service-url.defaultZone=http://tony:666666@127.0.0.1:9998/eureka/,http://tony:666666@127.0.0.1:9997/eureka/
#eureka.instance.prefer-ip-address=true
##修改服务负载均衡规则为随机
springcloud-provier-user-service.ribbon.NFLoadBalanceRuleClassName=com.netflix.loadbalancer.RandomRule
Feign是Netflix公司开发的声明式、模板化的HTTP客户端,其主要用途是更加便捷、优雅的调用HTTP API,Spring Cloud在原有基础上使Feign支持SpringMVC注解,并且整合了Ribbon和Eureka。
所属maven模块 springcloud-consumer-h5-feign
之前的maven模块springcloud-consumer-h5-ribbon-hystrix是使用RestTemplate(负载均衡是使用ribbon实现)调用RESTful API。 如下的登录方法:
@GetMapping("/login")
public User login(@RequestParam String name, @RequestParam String password){
LOGGER.info("call user service login method");
ResponseEntity responseEntity =this.restTemplate.getForEntity("http://SPRINGCLOUD-PROVIDER-USER-SERVICE/login?name={1},password={2}",User.class,name,password);
return responseEntity.getBody();
}
由代码可知通过拼接字符串的方式构造URL,而在其他业务场景中可能还会有更多的参数,如果还以这种方式构造URL,那么就会变得更低效,难以维护。
引入Netflix公司开发的Feign实现声明式的RESTful API 调用
pom.xml
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0modelVersion>
<groupId>com.ekeyfund.springcloudgroupId>
<artifactId>springcloud-consumer-h5-feignartifactId>
<packaging>jarpackaging>
<name>springcloud-consumer-h5-feignname>
<description>SpringCloud Feign H5 Applicationdescription>
<parent>
<groupId>com.ekeyfund.springcloudgroupId>
<artifactId>springcloud-parentartifactId>
<version>2.0.0-SNAPSHOTversion>
<relativePath>../pom.xmlrelativePath>
parent>
<properties>
<start-class>com.ekeyfund.springcloud.SpringcloudFeignH5Applicationstart-class>
properties>
<dependencies>
<dependency>
<groupId>org.springframework.cloudgroupId>
<artifactId>spring-cloud-starter-feignartifactId>
dependency>
dependencies>
<build>
<plugins>
<plugin>
<groupId>org.springframework.bootgroupId>
<artifactId>spring-boot-maven-pluginartifactId>
<configuration>
<mainClass>${start-class}mainClass>
<layout>ZIPlayout>
configuration>
<executions>
<execution>
<goals>
<goal>repackagegoal>
goals>
execution>
executions>
plugin>
plugins>
build>
project>
创建一个Feign接口,并添加@FeignClient注解
package com.ekeyfund.springcloud.feign;
import com.ekeyfund.springcloud.entity.User;
import org.springframework.cloud.netflix.feign.FeignClient;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;
import org.springframework.web.bind.annotation.RequestParam;
import java.util.List;
/**
* User Feign Client
*
* @author tony [email protected]
* @create 2017-06-29-下午2:44
* @see
* @since JDK1.8u133
*/
@FeignClient(value = "springcloud-provider-user-service") //
public interface UserFeignClient {
@RequestMapping(value = "/list",method = RequestMethod.GET)
List list();
@RequestMapping(value = "/login",method = RequestMethod.GET)
User login(@RequestParam("name") String name, @RequestParam("password") String password);
}
@FeignClient注解中的springcloud-provider-user-service是一个任意的客户端名称,用于创建Ribbon负载均衡器。
修改Controller,让其调用Feign接口
package com.ekeyfund.springcloud.controller;
import com.ekeyfund.springcloud.entity.User;
import com.ekeyfund.springcloud.feign.UserFeignClient;
import org.slf4j.LoggerFactory;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.cloud.client.ServiceInstance;
import org.springframework.cloud.client.loadbalancer.LoadBalancerClient;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RequestParam;
import org.springframework.web.bind.annotation.RestController;
import java.util.List;
/**
* User Feign Controller
*
* @author Liuguanglei [email protected]
* @create 2017-06-下午1:50
*/
@RestController
public class UserFeignController {
private static final org.slf4j.Logger LOGGER = LoggerFactory.getLogger(UserFeignController.class);
@Autowired
UserFeignClient userFeignClient;
@Autowired
private LoadBalancerClient loadBalancerClient;
@GetMapping(value = "/list")
public List list(){
return userFeignClient.list();
}
@GetMapping("/login")
public User login(@RequestParam String name,@RequestParam String password){
return userFeignClient.login(name,password);
}
/**
* ribbon负载均衡测试方法
* springcloud 将feign和ribbon以及eureka进行了集成
*/
@GetMapping("/log-user-service-instance")
public void loguserserviceinstance(){
ServiceInstance serviceInstance=this.loadBalancerClient.choose("springcloud-provider-user-service");
LOGGER.info("serviceInstance info ---> serviceId is "+serviceInstance.getServiceId()+" host is "+serviceInstance.getHost()+"port is "+serviceInstance.getPort() );
}
}
启动类
package com.ekeyfund.springcloud;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.cloud.client.discovery.EnableDiscoveryClient;
import org.springframework.cloud.netflix.feign.EnableFeignClients;
@EnableDiscoveryClient
@EnableFeignClients //开启SpringCloud Feign的支持功能
@SpringBootApplication
public class SpringcloudFeignH5Application {
public static void main(String[] args) {
SpringApplication.run(SpringcloudFeignH5Application.class, args);
}
}
访问地址:http://127.0.0.1:9993/login?name=tony&password=666666
访问http://127.0.0.1:9993/log-user-service-instance
查看控制台日志输出
2017-06-29 14:56:56.341 INFO 16173 — [nio-9993-exec-4] c.e.s.controller.UserFeignController : serviceInstance info —> serviceId is springcloud-provider-user-service host is 192.168.1.136port is 9995
2017-06-29 14:56:58.055 INFO 16173 — [nio-9993-exec-5] c.e.s.controller.UserFeignController : serviceInstance info —> serviceId is springcloud-provider-user-service host is 192.168.1.136port is 9996
2017-06-29 14:56:59.310 INFO 16173 — [nio-9993-exec-6] c.e.s.controller.UserFeignController : serviceInstance info —> serviceId is springcloud-provider-user-service host is 192.168.1.136port is 9995
2017-06-29 14:57:05.287 INFO 16173 — [nio-9993-exec-7] c.e.s.controller.UserFeignController : serviceInstance info —> serviceId is springcloud-provider-user-service host is 192.168.1.136port is 9996
2017-06-29 14:57:06.340 INFO 16173 — [nio-9993-exec-8] c.e.s.controller.UserFeignController : serviceInstance info —> serviceId is springcloud-provider-user-service host is 192.168.1.136port is 9995
以上结果说明不仅实现了声明式的Restful API调用,还实现了客户端的负载均衡
pom.xml
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0modelVersion>
<groupId>com.ekeyfund.springcloudgroupId>
<artifactId>springcloud-consumer-h5-ribbon-hystrixartifactId>
<packaging>jarpackaging>
<name>springcloud-consumer-h5-ribbon-hystrixname>
<description>Spring Cloud H5 Appliactiondescription>
<parent>
<groupId>com.ekeyfund.springcloudgroupId>
<artifactId>springcloud-parentartifactId>
<version>2.0.0-SNAPSHOTversion>
<relativePath>../pom.xmlrelativePath>
parent>
<properties>
<start-class>com.ekeyfund.springcloud.SpringcloudH5RibbonHystrixApplicationstart-class>
properties>
<dependencies>
<dependency>
<groupId>org.springframework.cloudgroupId>
<artifactId>spring-cloud-starter-ribbonartifactId>
dependency>
<dependency>
<groupId>org.springframework.cloudgroupId>
<artifactId>spring-cloud-starter-hystrixartifactId>
dependency>
<dependency>
<groupId>org.springframework.bootgroupId>
<artifactId>spring-boot-starter-webartifactId>
dependency>
<dependency>
<groupId>org.springframework.cloudgroupId>
<artifactId>spring-cloud-starter-eurekaartifactId>
dependency>
<dependency>
<groupId>com.fasterxml.jackson.coregroupId>
<artifactId>jackson-databindartifactId>
<version>2.8.8version>
dependency>
dependencies>
<dependencyManagement>
<dependencies>
<dependency>
<groupId>org.springframework.cloudgroupId>
<artifactId>spring-cloud-dependenciesartifactId>
<version>${spring-cloud.version}version>
<type>pomtype>
<scope>importscope>
dependency>
dependencies>
dependencyManagement>
<build>
<plugins>
<plugin>
<groupId>org.springframework.bootgroupId>
<artifactId>spring-boot-maven-pluginartifactId>
<configuration>
<mainClass>${start-class}mainClass>
<layout>ZIPlayout>
configuration>
<executions>
<execution>
<goals>
<goal>repackagegoal>
goals>
execution>
executions>
plugin>
plugins>
build>
project>
启动类:
添加@EnableCircuitBreaker为项目启动断路器支持
package com.ekeyfund.springcloud;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.cloud.client.circuitbreaker.EnableCircuitBreaker;
import org.springframework.cloud.client.discovery.EnableDiscoveryClient;
@EnableCircuitBreaker //启动断路器支持
@EnableDiscoveryClient
@SpringBootApplication
public class SpringcloudH5RibbonHystrixApplication {
public static void main(String[] args) {
SpringApplication.run(SpringcloudH5RibbonHystrixApplication.class, args);
}
}
修改UserController,让其中的list方法具备容错能力
package com.ekeyfund.springcloud.controller;
import com.netflix.hystrix.contrib.javanica.annotation.HystrixCommand;
import com.netflix.hystrix.contrib.javanica.annotation.HystrixProperty;
import com.ekeyfund.springcloud.entity.User;
import org.slf4j.LoggerFactory;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.cloud.client.ServiceInstance;
import org.springframework.cloud.client.loadbalancer.LoadBalancerClient;
import org.springframework.http.ResponseEntity;
import org.springframework.web.bind.annotation.*;
import org.springframework.web.client.RestTemplate;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.List;
/**
* User Controller
*
* @author Liuguanglei [email protected]
* @create 2017-06-上午12:55
*/
@RestController
public class UserController {
private static final org.slf4j.Logger LOGGER = LoggerFactory.getLogger(UserController.class);
@Autowired
private RestTemplate restTemplate;
@Autowired
private LoadBalancerClient loadBalancerClient;
@GetMapping("/login")
public User login(@RequestParam String name, @RequestParam String password){
LOGGER.info("call user service login method");
ResponseEntity responseEntity =this.restTemplate.getForEntity("http://SPRINGCLOUD-PROVIDER-USER-SERVICE/login?name={1},password={2}",User.class,name,password);
return responseEntity.getBody();
}
@HystrixCommand(fallbackMethod = "listFallback",commandProperties = {
@HystrixProperty(name="execution.isolation.thread.timeoutInMilliseconds",value = "50000"),
@HystrixProperty(name = "metrics.rollingStats.timeInMilliseconds",value = "10000")
},
threadPoolProperties = {
@HystrixProperty(name = "coreSize",value = "1"),
@HystrixProperty(name="maxQueueSize",value = "20")
}
)
@GetMapping("/list")
public List list(){
User[] users=this.restTemplate.getForObject("http://SPRINGCLOUD-PROVIDER-USER-SERVICE/list",User[].class);
List userList = Arrays.asList(users);
return userList;
}
/**
* 当list方法所在的服务不可用时,会调用此方法
* @return
*/
public List listFallback(){
User user =new User();
user.setName("admin");
List userList=new ArrayList<>();
userList.add(user);
return userList;
}
@GetMapping("user/get/{id}")
public User get(@PathVariable Long id){
return this.restTemplate.getForObject("http://SPRINGCLOUD-PROVIDER-USER-SERVICE/get/id={1}",User.class,id);
}
/**
* ribbon负载均衡测试方法
*/
@GetMapping("/log-user-service-instance")
public void loguserserviceinstance(){
ServiceInstance serviceInstance=this.loadBalancerClient.choose("springcloud-provider-user-service");
LOGGER.info("serviceInstance info ---> serviceId is "+serviceInstance.getServiceId()+" host is "+serviceInstance.getHost()+"port is "+serviceInstance.getPort() );
}
}
由代码可知,为list方法添加一个回退方法listFallback,该方法与list方法具有相同的参数和返回值类型。
在list方法上,使用注解@HystrixCommand的fallBackMethod属性,指定回退方法是listFallback。
访问地址:http://127.0.0.1:9994/list
当服务状态可用时的返回结果
关掉两个springcloud-provider-user-service进程后
再次访问http://127.0.0.1:9994/list
返回默认用户信息