Java钩子使用实例

/**
* 初始化加载快照数据，此处注意加载最新的快照数据和优先加载快照
* @throws MetaClientException 
*/
public void init() throws MetaClientException{
//先加载快照数据
initSnapshotData();
//从消息获取更新数据
MetaClientConfig metaClientConfig=new MetaClientConfig();
ZKConfig zkConfig = new ZKConfig(); 
zkConfig.zkConnect=zkConnect;
metaClientConfig.setZkConfig(zkConfig);
final BroadcastMessageSessionFactory  sessionFactory = new MetaBroadcastMessageSessionFactory(metaClientConfig);
        consumer = sessionFactory.createBroadcastConsumer(new ConsumerConfig(group));
        /* 本地测试时使用 
        final MessageSessionFactory sessionFactory = new MetaMessageSessionFactory(metaClientConfig);
  ConsumerConfig consumerConfig=new ConsumerConfig(group);
        consumer = sessionFactory.createConsumer(consumerConfig); */
        
        //启动消费
        consumer();
        //设置关闭钩子
        Runtime.getRuntime().addShutdownHook(new Thread() {  
            public void run() {  
            try {
consumer.shutdown();//关闭消息消费
saveSnapshot();
businessLog.info("consumer shutdown Hook new snapshot");
} catch (MetaClientException e) {
businessLog.error("consumer shutdown error",e);
}
            }  
        });
        
        businessLog.info("mahoutDataModelManager init ok");
}