zookeeper 監聽事件 PathChildrenCacheListener

zookeeper 監聽事件 PathChildrenCacheListener

PathChildrenCacheListener一次父節點註冊，監聽每次子節點操做，不監聽自身和查詢。

1.測試類：

package com.qy.learn.zk.curator; import org.apache.curator.framework.CuratorFramework; import org.apache.curator.framework.recipes.cache.PathChildrenCache; import org.apache.curator.framework.recipes.cache.PathChildrenCacheEvent; import org.apache.curator.framework.recipes.cache.PathChildrenCacheListener; import org.apache.curator.framework.recipes.cache.PathChildrenCache.StartMode; import org.slf4j.Logger; import org.slf4j.LoggerFactory; /** * @author 七脈 * 描述：利用父節點，監聽子節點的事件，每次都會觸發 */
public class PathChildrenCacheTest { private static final Logger log = LoggerFactory.getLogger(PathChildrenCacheTest.class); public static void main(String[] args) throws Exception { //獲取curator客戶端
        CuratorFramework client = MyCuratorClient.client(); //開啓客戶端
 client.start(); //cacheData if true, node contents are cached in addition to the stat
        PathChildrenCache pathChildrenCache = new PathChildrenCache(client, "/father",true); //StartMode.BUILD_INITIAL_CACHE同步初始化緩存數據
 pathChildrenCache.start(StartMode.BUILD_INITIAL_CACHE); //添加節點監聽事件,PathChildrenCacheListener每次都會觸發
        pathChildrenCache.getListenable().addListener(new PathChildrenCacheListener() { @Override public void childEvent(CuratorFramework client, PathChildrenCacheEvent event) throws Exception { log.info("接收到PathChildrenCacheListener監聽事件，節點：{}，事件類型：{}", event.getData().getPath(), event.getType()); } }); //測試事件
        MyCuratorClient.create(client, "/father/me", "me"); MyCuratorClient.update(client, "/father/me", "me2"); MyCuratorClient.query(client, "/father/me");//查詢不會觸發
        MyCuratorClient.delete(client, "/father/me"); //睡眠等待監聽事件觸發
        Thread.sleep(15000); pathChildrenCache.close(); client.close(); } }

 

2.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>2.1.1.RELEASE</version>
    </parent>
    
    <groupId>com.qy.learn</groupId>
    <artifactId>qy-learn-zk-curator</artifactId>
    <version>0.0.1-SNAPSHOT</version>
    <packaging>pom</packaging>
    
    <properties>
        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
        <project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
        <maven.compiler.source>1.8</maven.compiler.source>
        <maven.compiler.target>1.8</maven.compiler.target>
        <maven.compiler.compilerVersion>1.8</maven.compiler.compilerVersion>
        <maven.test.skip>true</maven.test.skip>
        <java.version>1.8</java.version>
        <spring.boot.version>2.0.1.RELEASE</spring.boot.version>
        <qy.code.version>0.0.1-SNAPSHOT</qy.code.version>
    </properties>
    
    <dependencies>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter</artifactId>
            <!-- 不使用springboot默認log -->
            <exclusions>
                <exclusion>
                    <groupId>org.springframework.boot</groupId>
                    <artifactId>spring-boot-starter-logging</artifactId>
                </exclusion>
            </exclusions>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-log4j2</artifactId>
        </dependency>
        
        <!-- https://mvnrepository.com/artifact/org.apache.zookeeper/zookeeper -->
        <dependency>
            <groupId>org.apache.zookeeper</groupId>
            <artifactId>zookeeper</artifactId>
            <version>3.4.12</version>
            <!-- 排除衝突jar -->
            <exclusions>
                <exclusion>
                    <groupId>org.slf4j</groupId>
                    <artifactId>slf4j-log4j12</artifactId>
                </exclusion>
            </exclusions>
        </dependency>
        
        <!-- https://mvnrepository.com/artifact/org.apache.curator/curator-framework -->
        <dependency>
            <groupId>org.apache.curator</groupId>
            <artifactId>curator-framework</artifactId>
            <version>4.1.0</version>
        </dependency>
        
        <!-- https://mvnrepository.com/artifact/org.apache.curator/curator-recipes -->
        <dependency>
            <groupId>org.apache.curator</groupId>
            <artifactId>curator-recipes</artifactId>
            <version>4.1.0</version>
        </dependency>
        
        
    </dependencies>
    
    <repositories>
        <repository>
            <id>nexus-aliyun</id>
            <name>Nexus aliyun</name>
            <url>http://maven.aliyun.com/nexus/content/groups/public</url>
            <releases>
                <enabled>true</enabled>
            </releases>
            <snapshots>
                <enabled>false</enabled>
            </snapshots>
        </repository>
    </repositories>
    <pluginRepositories>
        <pluginRepository>
            <id>nexus-aliyun</id>
            <name>Nexus aliyun</name>
            <url>http://maven.aliyun.com/nexus/content/groups/public</url>
            <releases>
                <enabled>true</enabled>
            </releases>
            <snapshots>
                <enabled>false</enabled>
            </snapshots>
        </pluginRepository>
    </pluginRepositories>
    
    
    <build>
        <plugins>
            <!-- 要將源碼放上去，須要加入這個插件 -->
            <plugin>
                <groupId>org.apache.maven.plugins</groupId>
                <artifactId>maven-source-plugin</artifactId>
                <configuration>
                    <attach>true</attach>
                </configuration>
                <executions>
                    <execution>
                        <phase>compile</phase>
                        <goals>
                            <goal>jar</goal>
                        </goals>
                    </execution>
                </executions>
            </plugin>

            <plugin>
                <groupId>org.apache.maven.plugins</groupId>
                <artifactId>maven-compiler-plugin</artifactId>
                <configuration>
                    <source>1.8</source>
                    <target>1.8</target>
                </configuration>
            </plugin>
        </plugins>
    </build>
</project>

源碼：https://pan.baidu.com/s/1WxW0NU6p7oAiK9O3Vtq-Hg