zookeeper使用

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>4.0.0</modelVersion>

    <groupId>net.datafans</groupId>

    <artifactId>exercise.dubbo</artifactId>

    <version>1.0.0</version>

    <packaging>jar</packaging>

    <name>exercise.dubbo</name>

    <url>http://maven.apache.org</url>

    <properties>

        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>

        <spring.version>3.1.1.RELEASE</spring.version>

    </properties>

    <repositories>

        <repository>

            <id>com.springsource.repository.bundles.release</id>

            <name>EBR Spring Release Repository</name>

            <url>http://repository.springsource.com/maven/bundles/release</url>

        </repository>

        <repository>

            <id>com.springsource.repository.bundles.external</id>

            <name>EBR External Release Repository</name>

            <url>http://repository.springsource.com/maven/bundles/external</url>

        </repository>

    </repositories>

    <dependencies>

        <dependency>

            <groupId>junit</groupId>

            <artifactId>junit</artifactId>

            <version>4.7</version>

            <scope>test</scope>

        </dependency>

        <dependency>

            <groupId>log4j</groupId>

            <artifactId>log4j</artifactId>

            <version>1.2.17</version>

        </dependency>

        <!-- dobbo begin -->

        <dependency>

            <groupId>com.alibaba</groupId>

            <artifactId>dubbo</artifactId>

            <version>2.5.3</version>

            <exclusions>

                <exclusion>

                    <artifactId>spring</artifactId>

                    <groupId>org.springframework</groupId>

                </exclusion>

            </exclusions>

        </dependency>

        <dependency>

            <groupId>org.apache.zookeeper</groupId>

            <artifactId>zookeeper</artifactId>

            <version>3.4.5</version>

        </dependency>

        <dependency>

            <groupId>com.github.sgroschupf</groupId>

            <artifactId>zkclient</artifactId>

            <version>0.1</version>

        </dependency>

        <!-- dobbo end -->

        <!-- spring begin -->

        <dependency>

            <groupId>org.springframework</groupId>

            <artifactId>spring-aop</artifactId>

            <version>${spring.version}</version>

        </dependency>

        <dependency>

            <groupId>org.springframework</groupId>

            <artifactId>spring-asm</artifactId>

            <version>${spring.version}</version>

        </dependency>

        <dependency>

            <groupId>org.springframework</groupId>

            <artifactId>spring-beans</artifactId>

            <version>${spring.version}</version>

        </dependency>

        <dependency>

            <groupId>org.springframework</groupId>

            <artifactId>spring-context</artifactId>

            <version>${spring.version}</version>

        </dependency>

        <dependency>

            <groupId>org.springframework</groupId>

            <artifactId>spring-core</artifactId>

            <version>${spring.version}</version>

        </dependency>

        <dependency>

            <groupId>org.springframework</groupId>

            <artifactId>spring-expression</artifactId>

            <version>${spring.version}</version>

        </dependency>

        <dependency>

            <groupId>org.springframework</groupId>

            <artifactId>spring-jdbc</artifactId>

            <version>${spring.version}</version>

        </dependency>

        <dependency>

            <groupId>org.springframework</groupId>

            <artifactId>spring-orm</artifactId>

            <version>${spring.version}</version>

        </dependency>

        <dependency>

            <groupId>org.springframework</groupId>

            <artifactId>spring-tx</artifactId>

            <version>${spring.version}</version>

        </dependency>

        <dependency>

            <groupId>org.springframework</groupId>

            <artifactId>spring-web</artifactId>

            <version>${spring.version}</version>

        </dependency>

        <dependency>

            <groupId>net.sourceforge.cglib</groupId>

            <artifactId>com.springsource.net.sf.cglib</artifactId>

            <version>2.1.3</version>

        </dependency>

        <!-- spring end -->

    </dependencies>

    <build>

        <plugins>

            <plugin>

                <groupId>org.apache.maven.plugins</groupId>

                <artifactId>maven-source-plugin</artifactId>

                <executions>

                    <execution>

                        <id>attach-sources</id>

                        <goals>

                            <goal>jar</goal>

                        </goals>

                    </execution>

                </executions>

            </plugin>

            <plugin>

                <groupId>org.apache.maven.plugins</groupId>

                <artifactId>maven-javadoc-plugin</artifactId>

                <executions>

                    <execution>

                        <id>attach-javadocs</id>

                        <goals>

                            <goal>jar</goal>

                        </goals>

                    </execution>

                </executions>

            </plugin>

        </plugins>

    </build>

</project>

View Code

在自己主机上面安装zookeeper，然后就可以写代码了，我们计划是将接口底层跟上层相互分离；

consumer.xml：

<?xml version="1.0" encoding="UTF-8"?>

<beans xmlns="http://www.springframework.org/schema/beans"

    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"

    xmlns:dubbo="http://code.alibabatech.com/schema/dubbo"

    xsi:schemaLocation="http://www.springframework.org/schema/beans

        http://www.springframework.org/schema/beans/spring-beans.xsd

        http://code.alibabatech.com/schema/dubbo

        http://code.alibabatech.com/schema/dubbo/dubbo.xsd

        ">

 

    <!-- 消费方应用名，用于计算依赖关系，不是匹配条件，不要与提供方一样 -->

    <dubbo:application name="consumer-of-helloworld-app"  />

 

    

    <dubbo:registry

        address="ip:port"

        protocol="zookeeper" />

 

    <!-- 生成远程服务代理，可以和本地bean一样使用demoService -->

    <dubbo:reference id="demoService" interface="net.datafans.exercise.dubbo.DemoService" />

 

</beans>

 

provider.xml

<?xml version="1.0" encoding="UTF-8"?>

<beans xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"

    xmlns:dubbo="http://code.alibabatech.com/schema/dubbo"

    xmlns="http://www.springframework.org/schema/beans"

    xsi:schemaLocation="http://www.springframework.org/schema/beans

        http://www.springframework.org/schema/beans/spring-beans.xsd

        http://code.alibabatech.com/schema/dubbo

        http://code.alibabatech.com/schema/dubbo/dubbo.xsd

        " >



    <!-- 提供方应用信息，用于计算依赖关系 -->



    <dubbo:application name="zookeeper-registry" />

    <!-- 当前应用信息配置 -->





    <!-- 暴露服务协议配置 -->



<!--     <dubbo:registry

        address="ip:port"

        protocol="zookeeper" /> -->

        

       <dubbo:registry

        address="120.132.37.251:2181"

        protocol="zookeeper" /> 



    <dubbo:protocol port="9090" />

    <!-- 声明需要暴露的服务接口 -->





    <!-- 和本地bean一样实现服务 -->



    <bean

        id="demoService"

        class="net.datafans.exercise.dubbo.DemoServiceImpl" />



    <dubbo:service

        interface="net.datafans.exercise.dubbo.DemoService"

        ref="demoService" >

    </dubbo:service>



</beans>

log4j.xml

<?xml version="1.0" encoding="UTF-8"?>

<!DOCTYPE log4j:configuration PUBLIC "-//APACHE//DTD LOG4J 1.2//EN" "log4j.dtd">

<log4j:configuration xmlns:log4j="http://jakarta.apache.org/log4j/">



    <!-- Appenders -->

    <appender name="CONSOLE.ERR" class="org.apache.log4j.ConsoleAppender">

        <param name="target" value="System.err" />

        <layout class="org.apache.log4j.PatternLayout">

            <param name="ConversionPattern"

                value="%d  %l %n%p: %m%n" />

        </layout>

        <filter class="org.apache.log4j.varia.LevelRangeFilter">

            <param name="LevelMin" value="warn" />

            <param name="LevelMax" value="fatal" />

            <param name="AcceptOnMatch" value="false" />

        </filter>

    </appender>



    <appender name="CONSOLE.OUT" class="org.apache.log4j.ConsoleAppender">

        <param name="target" value="System.out" />

        <layout class="org.apache.log4j.PatternLayout">

            <param name="ConversionPattern"

                value="%d  %l %n%p: %m%n" />

        </layout>

        <filter class="org.apache.log4j.varia.LevelRangeFilter">

            <param name="LevelMin" value="debug" />

            <param name="LevelMax" value="info" />

            <param name="AcceptOnMatch" value="false" />

        </filter>

    </appender>

    

    <logger name="com.errout">

        <level value="info" />

    </logger>





    <!-- Root Logger -->

    <root>

        <priority value="warn" />

        <appender-ref ref="CONSOLE.ERR" />

        <appender-ref ref="CONSOLE.OUT" />

    </root>



</log4j:configuration>

DemoService

package net.datafans.exercise.dubbo;



public interface DemoService {     

    String sayHello(String name);

}

View Code

DemoServiceImpl

package net.datafans.exercise.dubbo;



public class DemoServiceImpl implements DemoService { 

    public String sayHello(String name) {

        System.out.println(name);

        return "Hello " + name;

    }

}

View Code

Provider

package net.datafans.exercise.dubbo;



import org.springframework.context.support.ClassPathXmlApplicationContext;



public class Provider { 

    public static void main(String[] args) throws Exception {

        ClassPathXmlApplicationContext context = new ClassPathXmlApplicationContext(new String[] {"provider.xml"});

        context.start();



        System.in.read(); //

    }

 

}

View Code

Consumer

package net.datafans.exercise.dubbo;



import org.springframework.context.support.ClassPathXmlApplicationContext;



public class Consumer {



    public static void main(String[] args) throws Exception {

        ClassPathXmlApplicationContext context = new ClassPathXmlApplicationContext(new String[] { "consumer.xml" });

        context.start();

        for (int i = 0; i < 20000; i++) {

            long start = System.currentTimeMillis();

            DemoService demoService = (DemoService) context.getBean("demoService"); //

            System.out.println(demoService.sayHello("world"));

            long end = System.currentTimeMillis();

            System.out.println(end - start);

            System.in.read();

        }

        // long end = System.currentTimeMillis();

        // System.out.println("TPS: " + 20000 / ((end - start) / 1000.0));

        // System.out.println(end-start);

    }

}

View Code

 

 备用（zookeeper安装）：

wget http://mirror.bit.edu.cn/apache/zookeeper/zookeeper-3.3.6/zookeeper-3.3.6.tar.gz

sudo sh bin/zkServer.sh start

到conf下

cp zoo_sample.cfg zoo.cfg

备注：

zoo.cfg:

# The number of milliseconds of each tick
tickTime=2000
# The number of ticks that the initial
# synchronization phase can take
initLimit=10
# The number of ticks that can pass between
# sending a request and getting an acknowledgement
syncLimit=5
# the directory where the snapshot is stored.
dataDir=/tmp/zookeeper
# the port at which the clients will connect
clientPort=2181