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zookeeper springboot怎样进行配置管理

小樊
81
2024-12-26 10:42:49
栏目: 大数据

在Spring Boot中使用Apache ZooKeeper进行配置管理,可以通过以下几个步骤来实现:

  1. 添加依赖

在你的pom.xml文件中添加以下依赖:

<dependency>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-starter-data-zookeeper</artifactId>
</dependency>
  1. 配置ZooKeeper连接信息

application.propertiesapplication.yml文件中配置ZooKeeper的连接信息。例如:

# application.properties
spring.zookeeper.connect=127.0.0.1:2181
spring.zookeeper.session-timeout=3000
spring.zookeeper.connection-timeout=3000

或者

# application.yml
spring:
  zookeeper:
    connect: 127.0.0.1:2181
    session-timeout: 3000
    connection-timeout: 3000
  1. 创建配置类

创建一个配置类,用于读取ZooKeeper中的配置信息。例如:

import org.apache.zookeeper.KeeperException;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.stereotype.Component;

@Component
public class ZooKeeperConfig {

    @Value("${myapp.config.key}")
    private String configValue;

    public String getConfigValue() {
        return configValue;
    }

    public void setConfigValue(String configValue) {
        this.configValue = configValue;
    }

    public void watchConfigValue(String path) throws KeeperException, InterruptedException {
        // 这里可以使用Curator框架来监听配置值的变化
    }
}
  1. 使用配置信息

在你的服务类中,注入ZooKeeperConfig并获取配置信息。例如:

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

@Service
public class MyService {

    @Autowired
    private ZooKeeperConfig zooKeeperConfig;

    public void doSomething() {
        String configValue = zooKeeperConfig.getConfigValue();
        // 使用配置信息进行业务处理
    }
}
  1. 监听配置变化

如果你需要实时监听配置值的变化,可以使用Curator框架来实现。首先,需要在pom.xml中添加Curator依赖:

<dependency>
    <groupId>org.apache.curator</groupId>
    <artifactId>curator-framework</artifactId>
    <version>4.3.0</version>
</dependency>

然后,在ZooKeeperConfig类中添加Curator的相关代码:

import org.apache.curator.framework.CuratorFramework;
import org.apache.curator.framework.CuratorFrameworkFactory;
import org.apache.curator.framework.recipes.cache.NodeCache;
import org.apache.curator.framework.recipes.cache.NodeCacheListener;
import org.apache.zookeeper.KeeperException;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.stereotype.Component;

import java.util.concurrent.Executor;

@Component
public class ZooKeeperConfig {

    @Value("${myapp.config.key}")
    private String configValue;

    private CuratorFramework client;
    private NodeCache nodeCache;

    public ZooKeeperConfig() {
        client = CuratorFrameworkFactory.builder()
                .connectString("127.0.0.1:2181")
                .sessionTimeoutMs(3000)
                .build();
        client.start();

        nodeCache = new NodeCache(client, "/myapp/config");
        nodeCache.start();

        nodeCache.getListenable().addListener(new NodeCacheListener() {
            @Override
            public void nodeChanged() throws Exception {
                configValue = new String(nodeCache.getCurrentData().getData());
                System.out.println("Config value changed: " + configValue);
            }
        }, new Executor() {
            @Override
            public void execute(Runnable command) {
                command.run();
            }
        });
    }

    public String getConfigValue() {
        return configValue;
    }

    public void setConfigValue(String configValue) {
        this.configValue = configValue;
    }
}

现在,当ZooKeeper中的配置值发生变化时,你的应用程序将自动更新配置值。

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