Java操作zookeeper集群

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zookeeper

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>com.kovansys.test</groupId>
  <version>1.1.0</version>

  <artifactId>zookeeper_test</artifactId>

  <packaging>jar</packaging>

  <properties>

    <maven.compiler.source>11</maven.compiler.source>
    <maven.compiler.target>11</maven.compiler.target>

    <spring.version>5.1.6.RELEASE</spring.version>
    <logback.version>1.2.3</logback.version>
    <slf4j.version>1.7.26</slf4j.version>
    <junit.version>5.4.1</junit.version>
    <java.encoding>UTF-8</java.encoding>
    <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
    <zookeeper.version>3.4.14</zookeeper.version>

  </properties>
  <build>
    <directory>target</directory>
    <plugins>
      <plugin>
        <groupId>org.apache.maven.plugins</groupId>
        <artifactId>maven-compiler-plugin</artifactId>
        <version>3.8.0</version>
      </plugin>
    </plugins>
  </build>

  <dependencies>
    <dependency>
        <groupId>org.apache.zookeeper</groupId>
        <artifactId>zookeeper</artifactId>
        <version>${zookeeper.version}</version>
        
        <exclusions>
           <exclusion>
           <groupId>org.slf4j</groupId>
           <artifactId>slf4j-log4j12</artifactId>
           </exclusion>
           <exclusion>
           <groupId>log4j</groupId>
           <artifactId>log4j</artifactId>
           </exclusion>
        </exclusions>

    </dependency>

    <dependency>
      <groupId>org.springframework</groupId>
      <artifactId>spring-core</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-tx</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-test</artifactId>
      <version>${spring.version}</version>
    </dependency>


    <dependency>
      <groupId>org.junit.jupiter</groupId>
      <artifactId>junit-jupiter-api</artifactId>
      <version>${junit.version}</version>
      <scope>test</scope>
    </dependency>

    <dependency>
      <groupId>org.junit.jupiter</groupId>
      <artifactId>junit-jupiter-engine</artifactId>
      <version>${junit.version}</version>
      <scope>test</scope>
    </dependency>

    <dependency>
      <groupId>org.slf4j</groupId>
      <artifactId>slf4j-api</artifactId>
      <version>${slf4j.version}</version>
    </dependency>

    <dependency>
      <groupId>ch.qos.logback</groupId>
      <artifactId>logback-core</artifactId>
      <version>${logback.version}</version>
    </dependency>

    <dependency>
      <groupId>ch.qos.logback</groupId>
      <artifactId>logback-classic</artifactId>
      <version>${logback.version}</version>
    </dependency>

    <dependency>
      <groupId>org.slf4j</groupId>
      <artifactId>jcl-over-slf4j</artifactId>
      <version>${slf4j.version}</version>
    </dependency>

    <dependency>
      <groupId>org.slf4j</groupId>
      <artifactId>log4j-over-slf4j</artifactId>
      <version>${slf4j.version}</version>
    </dependency>

  </dependencies>

</project>

测试类

package zookeeper_test;

import org.apache.zookeeper.CreateMode;
import org.apache.zookeeper.WatchedEvent;
import org.apache.zookeeper.Watcher;
import org.apache.zookeeper.ZooDefs.Ids;
import org.apache.zookeeper.ZooKeeper;
import org.junit.jupiter.api.Test;

public class ZookeeperTest {

  @Test
  public void testZookeeper() {
    int SESSION_TIMEOUT = 30 * 1000;

    Watcher wh = new Watcher() {
      public void process(WatchedEvent event) {
        System.out.println("WatchedEvent >>> " + event.toString());
      }
    };

    ZooKeeper zk = null;
    try {
      zk = new ZooKeeper("192.168.0.180:2181,192.168.0.180:2182,192.168.0.180:2183", SESSION_TIMEOUT, wh);

      // create node
      zk.create("/test", "My Data".getBytes(), Ids.OPEN_ACL_UNSAFE, CreateMode.PERSISTENT);
      // get node data
      System.out.println("data of /test is:" + String.valueOf(new String(zk.getData("/test", false, null))));

      // add watcher
      zk.exists("/test", wh);
      // update node
      zk.setData("/test", "Data updated".getBytes(), -1);
      // get node data
      System.out.println("data of /test is:" + String.valueOf(new String(zk.getData("/test", false, null))));

      // add watcher
      zk.exists("/test", wh);
      // delete
      zk.delete("/test", -1);
      // if node exist
      System.out.println(" node /test exists： [" + (zk.exists("/test", false) != null) + "]");

    } catch (Exception e) {
      e.printStackTrace();
    } finally {
      if (zk != null) {
        try {
          zk.close();
        } catch (Exception e) {
          e.printStackTrace();
        }
      }
    }

  }
}

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