ZK springboot整合zookeeper
2021-03-30 本文已影响0人
小P聊技术
1 资源
资源信息 | 版本号 | 备注 |
---|---|---|
zookeeper | 3.4.10 | IP: 192.168.51.4 |
springboot | 2.1.5.RELEASE | |
prettyZoo | 2.0 | zookeeper可视化工具 |
springboot-zookeeper-demo 源码 下载
2 zookeeper安装
需要安装zookeeper,如果未安装,可参考博文:
3 springboot整合
3.1 pom文件
<?xml version="1.0" encoding="UTF-8"?>
<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>
<parent>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-parent</artifactId>
<version>2.1.5.RELEASE</version>
<!-- <version>2.3.2.RELEASE</version>-->
<relativePath />
</parent>
<groupId>com.auksat.demo</groupId>
<artifactId>springboot-zookeeper-demo</artifactId>
<version>1.0-SNAPSHOT</version>
<properties>
<maven.compiler.source>8</maven.compiler.source>
<maven.compiler.target>8</maven.compiler.target>
<zookeeper.version>3.4.10</zookeeper.version>
<curator.version>2.11.1</curator.version>
</properties>
<dependencies>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-web</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-test</artifactId>
<scope>test</scope>
</dependency>
<dependency>
<groupId>org.apache.zookeeper</groupId>
<artifactId>zookeeper</artifactId>
<version>${zookeeper.version}</version>
<exclusions>
<exclusion>
<groupId>org.slf4j</groupId>
<artifactId>slf4j-log4j12</artifactId>
</exclusion>
<exclusion>
<groupId>org.slf4j</groupId>
<artifactId>slf4j-api</artifactId>
</exclusion>
</exclusions>
</dependency>
<!-- <dependency>-->
<!-- <groupId>org.apache.curator</groupId>-->
<!-- <artifactId>curator-framework</artifactId>-->
<!-- <version>${curator.version}</version>-->
<!-- </dependency>-->
<!-- <dependency>-->
<!-- <groupId>org.apache.curator</groupId>-->
<!-- <artifactId>curator-recipes</artifactId>-->
<!-- <version>${curator.version}</version>-->
<!-- </dependency>-->
<!-- <dependency>-->
<!-- <groupId>org.apache.curator</groupId>-->
<!-- <artifactId>curator-client</artifactId>-->
<!-- <version>${curator.version}</version>-->
<!-- </dependency>-->
</dependencies>
</project>
3.2 配置信息
3.2.1 application.yml
zookeeper:
address: 192.168.51.4:2181
timeout: 4000
3.2.2 配置类
package com.auskat.demo.zookeeper.config;
import org.apache.zookeeper.WatchedEvent;
import org.apache.zookeeper.Watcher;
import org.apache.zookeeper.ZooKeeper;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import java.io.IOException;
import java.util.concurrent.CountDownLatch;
/**
* 类文件: ZookeeperConfig
* <p>
* <p>
* 类描述:
* <p>
* 作 者: AusKa_T
* <p>
* 日 期: 2021/3/24 0024
* <p>
* 时 间: 9:23
* <p>
*/
@Configuration
public class ZookeeperConfig {
private static final Logger logger = LoggerFactory.getLogger(ZookeeperConfig.class);
@Value("${zookeeper.address}")
private String connectString;
@Value("${zookeeper.timeout}")
private int sessionTimeout;
public String getConnectString() {
return connectString;
}
public void setConnectString(String connectString) {
this.connectString = connectString;
}
public int getSessionTimeout() {
return sessionTimeout;
}
public void setSessionTimeout(int sessionTimeout) {
this.sessionTimeout = sessionTimeout;
}
@Bean(name = "zkClient")
public ZooKeeper zkClient() {
ZooKeeper zooKeeper = null;
try {
final CountDownLatch countDownLatch = new CountDownLatch(1);
zooKeeper = new ZooKeeper(connectString, sessionTimeout, new Watcher() {
@Override
public void process(WatchedEvent event) {
// 如果收到了服务端的响应事件,说明连接成功
if (Event.KeeperState.SyncConnected == event.getState()) {
countDownLatch.countDown();
}
}
});
countDownLatch.await();
logger.info(" 初始化ZooKeeper连接状态: {}",zooKeeper.getState());
} catch (Exception e) {
logger.error(" 初始化Zookeeper连接状态异常: {}",e.getMessage());
}
return zooKeeper;
}
}
3.3 自定义监听
package com.auskat.demo.zookeeper.watch;
import com.auskat.demo.zookeeper.config.ZookeeperConfig;
import org.apache.zookeeper.WatchedEvent;
import org.apache.zookeeper.Watcher;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
/**
* 类文件: WatcherApi
* <p>
* <p>
* 类描述:
* <p>
* 作 者: AusKa_T
* <p>
* 日 期: 2021/3/24 0024
* <p>
* 时 间: 9:40
* <p>
*/
public class CustomWatcher implements Watcher {
private static final Logger logger = LoggerFactory.getLogger(CustomWatcher.class);
@Override
public void process(WatchedEvent event) {
logger.info("监听事件的状态: {}",event.getState());
logger.info("监听事件的路径: {}",event.getPath());
logger.info("监听事件的类型: {}",event.getType());
}
}
3.4 自定义工具类
package com.auskat.demo.zookeeper.utils;
import com.auskat.demo.zookeeper.config.ZookeeperConfig;
import com.auskat.demo.zookeeper.watch.CustomWatcher;
import org.apache.zookeeper.*;
import org.apache.zookeeper.data.ACL;
import org.apache.zookeeper.data.Stat;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Component;
import javax.annotation.PostConstruct;
import java.io.IOException;
import java.util.List;
/**
* 类文件: ZkUtil
* <p>
* <p>
* 类描述:
* <p>
* 作 者: AusKa_T
* <p>
* 日 期: 2021/3/24 0024
* <p>
* 时 间: 9:35
* <p>
*/
@Component
public class ZkUtil {
private static final Logger logger = LoggerFactory.getLogger(ZkUtil.class);
@Autowired
private ZooKeeper zkClient;
@Autowired
private ZookeeperConfig ZooKeeper;
/**
* 创建持久化节点
* -- 客户端断开连接后,节点数据持久化在磁盘上,不会被删除。
*
* @param path 路径
* @param data 数据
*/
public boolean createPerNode(String path, String data) {
try {
// 参数1:要创建的节点的路径; 参数2:节点数据 ; 参数3:节点权限 ;参数4:节点的类型
zkClient.create(path, data.getBytes(), ZooDefs.Ids.OPEN_ACL_UNSAFE, CreateMode.PERSISTENT);
return true;
} catch (Exception e) {
logger.error("创建持久化节点异常,路径: {}, 数据: {}, 异常: {}", path, data, e);
return false;
}
}
/**
* 创建临时节点
* -- 客户端断开连接后,节点将被删除。
*
* @param path 路径
* @param data 数据
*/
public boolean createTmpNode(String path, String data) {
try {
// 参数1:要创建的节点的路径; 参数2:节点数据 ; 参数3:节点权限 ;参数4:节点的类型
zkClient.create(path, data.getBytes(), ZooDefs.Ids.OPEN_ACL_UNSAFE, CreateMode.EPHEMERAL);
return true;
} catch (Exception e) {
logger.error("创建临时节点异常,路径: {}, 数据: {}, 异常: {}", path, data, e);
return false;
}
}
/**
* 创建自定义节点
*
* @param path 路径
* @param data 数据
* @param acl 节点权限
* @param createMode 节点类型
*/
public boolean createNode(String path, String data, List<ACL> acl, CreateMode createMode) {
try {
// 参数1:要创建的节点的路径; 参数2:节点数据 ; 参数3:节点权限 ;参数4:节点的类型
zkClient.create(path, data.getBytes(), acl, createMode);
return true;
} catch (Exception e) {
logger.error("创建节点异常,路径: {}, 数据: {}, 异常: {}", path, data, e);
return false;
}
}
/**
* 修改节点
*
* @param path 路径
* @param data 数据
*/
public boolean updateNode(String path, String data) {
try {
// zk的数据版本是从0开始计数的。如果客户端传入的是-1,则表示zk服务器需要基于最新的数据进行更新。如果对zk的数据节点的更新操作没有原子性要求则可以使用-1.
// version参数指定要更新的数据的版本, 如果version和真实的版本不同, 更新操作将失败. 指定version为-1则忽略版本检查
zkClient.setData(path, data.getBytes(), -1);
return true;
} catch (Exception e) {
logger.error("修改节点异常,路径: {}, 数据: {}, 异常: {}", path, data, e);
return false;
}
}
/**
* 删除节点
*
* @param path 路径
*/
public boolean deleteNode(String path) {
try {
// version参数指定要更新的数据的版本, 如果version和真实的版本不同, 更新操作将失败. 指定version为-1则忽略版本检查
zkClient.delete(path, -1);
return true;
} catch (Exception e) {
logger.error("删除节点异常,路径: {}, 异常: {}", path, e);
return false;
}
}
/**
* 判断指定节点是否存在
*
* @param path 路径
* @param needWatch 指定是否复用zookeeper中默认的Watcher
* @return 结果
*/
public Stat exists(String path, boolean needWatch) {
try {
return zkClient.exists(path, needWatch);
} catch (Exception e) {
logger.error("判断指定节点是否存在异常,路径: {}, 异常: {}", path, e);
return null;
}
}
/**
* 检测结点是否存在 并设置监听事件
* 三种监听类型: 创建,删除,更新
*
* @param path 路径
* @param watcher 传入指定的监听类
*/
public Stat exists(String path, Watcher watcher) {
try {
return zkClient.exists(path, watcher);
} catch (Exception e) {
logger.error("判断指定节点是否存在异常,路径: {}, 异常: {}", path, e);
return null;
}
}
/**
* 获取当前节点的子节点(不包含孙子节点)
*
* @param path 父节点path
*/
public List<String> getChildren(String path) throws KeeperException, InterruptedException {
List<String> list = zkClient.getChildren(path, false);
return list;
}
/**
* 获取指定节点的值
*
* @param path 路径
*/
public String getData(String path, Watcher watcher) {
try {
Stat stat = new Stat();
byte[] bytes = zkClient.getData(path, watcher, stat);
return new String(bytes);
} catch (Exception e) {
e.printStackTrace();
return null;
}
}
// /**
// * 注册监听
// * @param watcher 监听类
// */
// public void registerWatch(Watcher watcher) throws IOException {
// ZooKeeper zooKeeper = new ZooKeeper(ZooKeeper.getConnectString(), ZooKeeper.getSessionTimeout(), watcher);
// }
}
4 功能测试
4.1 Idea调试
package com.auskat.demo.zookeeper;
import com.auskat.demo.zookeeper.utils.ZkUtil;
import com.auskat.demo.zookeeper.watch.CustomWatcher;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.boot.test.context.SpringBootTest;
import org.springframework.test.context.junit4.SpringRunner;
/**
* 类文件: ApplicationTest
* <p>
* <p>
* 类描述:
* <p>
* 作 者: AusKa_T
* <p>
* 日 期: 2021/3/24 0024
* <p>
* 时 间: 9:59
* <p>
*/
@RunWith(SpringRunner.class)
@SpringBootTest
public class ApplicationTest {
@Autowired
private ZkUtil zkUtil;
/**
* 新增节点
*/
@Test
public void testCreateNode() {
zkUtil.createPerNode("/demo", "auskat");
}
/**
* 修改节点
*/
@Test
public void testUpdateNode() {
zkUtil.updateNode("/demo", "auskat-2");
}
/**
* 获取节点是否存在
* 自定义监听
*/
@Test
public void exists() {
zkUtil.exists("/demo", new CustomWatcher());
}
/**
* 获取节点数据
* 自定义监听
*/
@Test
public void getData() throws InterruptedException {
String data = zkUtil.getData("/demo", new CustomWatcher());
System.out.println(data);
zkUtil.updateNode("/demo", "auskat-3");
Thread.sleep(Long.MAX_VALUE);
}
/**
* 删除节点
*/
@Test
public void testDeleteNode() {
zkUtil.deleteNode("/demo");
}
}
4.2 可视化工具查看
使用 prettyZoo
zookeeper可视化工具查看节点信息
4.2.1 建立连接
在这里插入图片描述 在这里插入图片描述4.2.2 查看数据
在这里插入图片描述5 相关信息
- 博文不易,辛苦各位猿友点个关注和赞,感谢