接管SpringBoot对Activiti的数据源自动配置
SpringBoot的自动配置真的让人又爱又恨，但还是爱更多一点。
SpringBoot想要帮我们自动配置好一切，但是有时候配置的却并不是我们需要的，甚至有时候会默默的坑我们。
我的项目是一个多数据源的项目(多数据源戳这里），其中有一个主数据源configDataSource，用来存放配置的库，我又新建了一个activitiDataSource,想要存放activiti的工作表。但是springboot却把configDataSource配置为了Activiti的库。
不想把activiti的自动配置关掉，毕竟用起来还是很方便的。那么只能更改springboot对activiti的默认配置了，经过实践可以使用如下方式：注释解释的很清楚了，就不啰嗦了。
/**
* @author [email protected]
* @date 2017/8/30 上午12:54
* @desc Activiti的数据和事物配置.
*/
@Configuration//声名为配置类，继承Activiti抽象配置类
public class ActivitiConfig extends AbstractProcessEngineAutoConfiguration {
@Resource
DataSource activitiDataSource;//注入配置好的数据源
@Resource
PlatformTransactionManager activitiTransactionManager;//注入配置好的事物管理器
//注入数据源和事务管理器
@Bean
public SpringProcessEngineConfiguration springProcessEngineConfiguration(
SpringAsyncExecutor springAsyncExecutor) throws IOException {
return this.baseSpringProcessEngineConfiguration(activitiDataSource, activitiTransactionManager, springAsyncExecutor);
}
}
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到这里就搞定了，springboot就会使用我们声名的数据源来配置Activiti了。
下面附上我的数据源和事物管理器的配置。
配置文件:
#-----------------------------------数据源配置-----------------------------
#activiti数据源
spring.datasource.activiti.url=jdbc:mysql://localhost:3306/activiti?characterEncoding=utf8&serverTimezone=Asia/Shanghai&useSSL=false
spring.datasource.activiti.username=root
spring.datasource.activiti.password=123456
spring.datasource.activiti.driver-class-name=com.mysql.jdbc.Driver
spring.datasource.activiti.maxActive=20
spring.datasource.activiti.initialSize=5
spring.datasource.activiti.minIdle=5
spring.datasource.activiti.maxWait=60000
spring.datasource.activiti.maxPoolPreparedStatementPerConnectionSize=20
spring.datasource.activiti.timeBetweenEvictionRunsMillis=60000
spring.datasource.activiti.minEvictableIdleTimeMillis=300000
spring.datasource.activiti.poolPreparedStatements=true
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配置类
1.属性读取 ActivitiDataSourceProperties.java
package com.kingboy.activiti.config;
import lombok.Data;
import org.springframework.boot.context.properties.ConfigurationProperties;
import org.springframework.stereotype.Component;
/**
* @author kingboy
* @date 2017/6/19 下午5:15
* @desc configuration的数据池属性
*/
@ConfigurationProperties(prefix = "spring.datasource.activiti")
@Data
@Component
public class ActivitiDataSourceProperties {
private String url;
private String username;
private String password;
private String driverClassName;
private Integer maxActive;
private Integer initialSize;
private Integer minIdle;
private Integer maxWait;
private Integer maxPoolPreparedStatementPerConnectionSize;
private Integer timeBetweenEvictionRunsMillis;
private Integer minEvictableIdleTimeMillis;
private Boolean poolPreparedStatements;
}
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- 数据源和事物配置ActivitiJPAConfig.java
/**
* @author kingboy
* @date 2017/6/18 下午11:13
* @desc 数据源配置
*/
@Configuration
@EnableTransactionManagement//开启事物管理
@EnableJpaRepositories(//自定义数据管理的配置
//指定EntityManager的创建工厂Bean
entityManagerFactoryRef = "activitiEntityManagerFactory",
//指定事物管理的Bean
transactionManagerRef = "activitiTransactionManager",
//指定管理的实体位置
basePackages = {"com.kingboy.activiti.domain"})
public class ActivitiJPAConfig {
/*
* 配置数据源
*/
@Bean
public DataSource activitiDataSource() {
DruidDataSource dataSource = new DruidDataSource();
//设置数据源的属性
setDruidProperties(dataSource);
return dataSource;
}
//注入数据源配置信息
@Autowired
ActivitiDataSourceProperties config;
//设置数据源的属性的方法
private void setDruidProperties(DruidDataSource dataSource) {
dataSource.setUrl(config.getUrl());
dataSource.setUsername(config.getUsername());
dataSource.setPassword(config.getPassword());
dataSource.setDriverClassName(config.getDriverClassName());
dataSource.setMaxActive(config.getMaxActive());
dataSource.setInitialSize(config.getInitialSize());
dataSource.setMinIdle(config.getMinIdle());
dataSource.setMaxWait(config.getMaxWait());
dataSource.setMaxPoolPreparedStatementPerConnectionSize(config.getMaxPoolPreparedStatementPerConnectionSize());
dataSource.setTimeBetweenEvictionRunsMillis(config.getTimeBetweenEvictionRunsMillis());
dataSource.setMinEvictableIdleTimeMillis(config.getMinEvictableIdleTimeMillis());
dataSource.setPoolPreparedStatements(config.getPoolPreparedStatements());
}
/*
* 配置实体管理工厂Bean
*/
@Bean
public LocalContainerEntityManagerFactoryBean activitiEntityManagerFactory(EntityManagerFactoryBuilder builder) {
return builder
.dataSource(activitiDataSource())
.packages("com.kingboy.activiti.domain")//设置实体类所在位置
.persistenceUnit("activiti")
.properties(getProperties(activitiDataSource()))//设置hibernate通用配置
.build();
}
//注入spring自带的jpa属性类
@Autowired
private JpaProperties jpaProperties;
/*
*拿到hibernate的通用配置
*/
private Map<String, String> getProperties(DataSource dataSource) {
return jpaProperties.getHibernateProperties(dataSource);
}
/*
*配置事物管理的Bean
*/
@Bean
public PlatformTransactionManager activitiTransactionManager(EntityManagerFactoryBuilder builder) {
return new JpaTransactionManager(activitiEntityManagerFactory(builder).getObject());
}
}
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