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:
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>
在application.properties
或application.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
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("${myapp.config.key}")
private String configValue;
public String getConfigValue() {
return configValue;
}
public void setConfigValue(String configValue) {
this.configValue = configValue;
}
public void watchConfigValue(String path) throws KeeperException, InterruptedException {
// 这里可以使用Curator框架来监听配置值的变化
}
}
在你的服务类中,注入ZooKeeperConfig
并获取配置信息。例如:
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
@Service
public class MyService {
@Autowired
private ZooKeeperConfig zooKeeperConfig;
public void doSomething() {
String configValue = zooKeeperConfig.getConfigValue();
// 使用配置信息进行业务处理
}
}
如果你需要实时监听配置值的变化,可以使用Curator框架来实现。首先,需要在pom.xml
中添加Curator依赖:
<dependency>
<groupId>org.apache.curator</groupId>
<artifactId>curator-framework</artifactId>
<version>4.3.0</version>
</dependency>
然后,在ZooKeeperConfig
类中添加Curator的相关代码:
import org.apache.curator.framework.CuratorFramework;
import org.apache.curator.framework.CuratorFrameworkFactory;
import org.apache.curator.framework.recipes.cache.NodeCache;
import org.apache.curator.framework.recipes.cache.NodeCacheListener;
import org.apache.zookeeper.KeeperException;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.stereotype.Component;
import java.util.concurrent.Executor;
@Component
public class ZooKeeperConfig {
@Value("${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。