一、前言
前面分析了LeaderZooKeeperServer，接著分析FollowerZooKeeperServer。
二、FollowerZooKeeperServer源碼分析
2.1 類的繼承關(guān)系
public class FollowerZooKeeperServer extends LearnerZooKeeperServer {}說明：其繼承LearnerZooKeeperServer抽象類，角色為Follower。其請求處理鏈為FollowerRequestProcessor -> CommitProcessor -> FinalRequestProcessor。
2.2 類的屬性
public class FollowerZooKeeperServer extends LearnerZooKeeperServer { private static final Logger LOG =
LoggerFactory.getLogger(FollowerZooKeeperServer.class); // 提交請求處理器 CommitProcessor commitProcessor;
// 同步請求處理器 SyncRequestProcessor syncProcessor; /*
* Pending sync requests */
// 待同步請求
ConcurrentLinkedQueue<Request> pendingSyncs;
// 待處理的事務(wù)請求
LinkedBlockingQueue<Request> pendingTxns = new LinkedBlockingQueue<Request>();
}
網(wǎng)友評論
