org.apache.flink.runtime.leaderelection

类 StandaloneLeaderElectionService

java.lang.Object

org.apache.flink.runtime.leaderelection.StandaloneLeaderElectionService

所有已实现的接口:

LeaderElectionService

public class StandaloneLeaderElectionService
extends Object
implements LeaderElectionService

Standalone implementation of the LeaderElectionService interface. The standalone implementation assumes that there is only a single LeaderContender and thus directly grants him the leadership upon start up. Furthermore, there is no communication needed between multiple standalone leader election services.

构造器概要

构造器

构造器和说明
StandaloneLeaderElectionService()

方法概要

限定符和类型	方法和说明
void	confirmLeadership(UUID leaderSessionID, String leaderAddress) Confirms that the LeaderContender has accepted the leadership identified by the given leader session id.
boolean	hasLeadership(UUID leaderSessionId) Returns true if the LeaderContender with which the service has been started owns currently the leadership under the given leader session id.
void	start(LeaderContender newContender) Starts the leader election service.
void	stop() Stops the leader election service.

从类继承的方法 java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

构造器详细资料

StandaloneLeaderElectionService

public StandaloneLeaderElectionService()

方法详细资料

start

public void start(LeaderContender newContender)
           throws Exception

从接口复制的说明: LeaderElectionService

Starts the leader election service. This method can only be called once.

指定者:

start 在接口中 LeaderElectionService

参数:

newContender - LeaderContender which applies for the leadership

抛出:

Exception

stop

public void stop()

从接口复制的说明: LeaderElectionService

Stops the leader election service.

指定者:

stop 在接口中 LeaderElectionService

confirmLeadership

public void confirmLeadership(UUID leaderSessionID,
                              String leaderAddress)

从接口复制的说明: LeaderElectionService

Confirms that the LeaderContender has accepted the leadership identified by the given leader session id. It also publishes the leader address under which the leader is reachable.

The rational behind this method is to establish an order between setting the new leader session ID in the LeaderContender and publishing the new leader session ID as well as the leader address to the leader retrieval services.

指定者:

confirmLeadership 在接口中 LeaderElectionService

参数:

leaderSessionID - The new leader session ID

leaderAddress - The address of the new leader

hasLeadership

public boolean hasLeadership(@Nonnull
                             UUID leaderSessionId)

从接口复制的说明: LeaderElectionService

Returns true if the LeaderContender with which the service has been started owns currently the leadership under the given leader session id.

指定者:

hasLeadership 在接口中 LeaderElectionService

参数:

leaderSessionId - identifying the current leader

返回:

true if the associated LeaderContender is the leader, otherwise false