Package org.apache.hadoop.hbase.master.replication

Class AbstractPeerProcedure<TState>

java.lang.Object

org.apache.hadoop.hbase.procedure2.Procedure<TEnvironment>

org.apache.hadoop.hbase.procedure2.StateMachineProcedure<MasterProcedureEnv,TState>

org.apache.hadoop.hbase.master.replication.AbstractPeerNoLockProcedure<TState>

org.apache.hadoop.hbase.master.replication.AbstractPeerProcedure<TState>

All Implemented Interfaces:

Comparable<Procedure<MasterProcedureEnv>>, PeerProcedureInterface

Direct Known Subclasses:

ModifyPeerProcedure, TransitPeerSyncReplicationStateProcedure

@Private
public abstract class AbstractPeerProcedure<TState>
extends AbstractPeerNoLockProcedure<TState>
implements PeerProcedureInterface

The base class for all replication peer related procedure.

Nested Class Summary

Nested classes/interfaces inherited from class org.apache.hadoop.hbase.procedure2.StateMachineProcedure

StateMachineProcedure.Flow

Nested classes/interfaces inherited from class org.apache.hadoop.hbase.procedure2.Procedure

Procedure.LockState

Nested classes/interfaces inherited from interface org.apache.hadoop.hbase.master.procedure.PeerProcedureInterface

PeerProcedureInterface.PeerOperationType

Field Summary

Fields

Modifier and Type	Field	Description
protected ProcedurePrepareLatch	latch
private static final org.slf4j.Logger	LOG
protected static final int	SLEEP_INTERVAL_MS
protected static final int	UPDATE_LAST_SEQ_ID_BATCH_SIZE

Fields inherited from class org.apache.hadoop.hbase.master.replication.AbstractPeerNoLockProcedure

peerId

Fields inherited from class org.apache.hadoop.hbase.procedure2.StateMachineProcedure

stateCount

Fields inherited from class org.apache.hadoop.hbase.procedure2.Procedure

NO_PROC_ID, NO_TIMEOUT

Constructor Summary

Constructors

Modifier	Constructor	Description
protected	AbstractPeerProcedure()
protected	AbstractPeerProcedure(String peerId)

Method Summary

Modifier and Type	Method	Description
protected Procedure.LockState	acquireLock(MasterProcedureEnv env)	The user should override this method if they need a lock on an Entity.
private void	addToMap(Map<String,Long> lastSeqIds, String encodedRegionName, long barrier, ReplicationQueueStorage queueStorage)
protected final void	checkPeerModificationEnabled(MasterProcedureEnv env)
protected void	enablePeer(MasterProcedureEnv env)
ProcedurePrepareLatch	getLatch()
protected boolean	holdLock(MasterProcedureEnv env)	Used to keep the procedure lock even when the procedure is yielding or suspended.
private boolean	needSetLastPushedSequenceId(TableStateManager tsm, TableName tn)
protected final void	refreshPeer(MasterProcedureEnv env, PeerProcedureInterface.PeerOperationType type)
protected void	releaseLock(MasterProcedureEnv env)	The user should override this method, and release lock if necessary.
protected final void	setLastPushedSequenceId(MasterProcedureEnv env, ReplicationPeerConfig peerConfig)
protected final void	setLastPushedSequenceIdForTable(MasterProcedureEnv env, TableName tableName, Map<String,Long> lastSeqIds)

Methods inherited from class org.apache.hadoop.hbase.master.replication.AbstractPeerNoLockProcedure

deserializeStateData, getPeerId, resetRetry, rollbackState, serializeStateData, setTimeoutFailure, suspend, waitInitialized

Methods inherited from class org.apache.hadoop.hbase.procedure2.StateMachineProcedure

abort, addChildProcedure, execute, executeFromState, failIfAborted, getCurrentState, getCurrentStateId, getCycles, getInitialState, getState, getStateId, isEofState, isRollbackSupported, isRollbackSupported, isYieldAfterExecutionStep, isYieldBeforeExecuteFromState, rollback, setNextState, toStringState

Methods inherited from class org.apache.hadoop.hbase.procedure2.Procedure

addStackIndex, afterExec, afterReplay, beforeExec, beforeReplay, bypass, compareTo, completionCleanup, doExecute, doRollback, elapsedTime, getChildrenLatch, getException, getLastUpdate, getNonceKey, getOwner, getParentProcId, getProcedureMetrics, getProcId, getProcIdHashCode, getProcName, getResult, getRootProcedureId, getRootProcId, getStackIndexes, getState, getSubmittedTime, getTimeout, getTimeoutTimestamp, hasChildren, hasException, hasLock, hasOwner, hasParent, hasTimeout, haveSameParent, incChildrenLatch, isBypass, isFailed, isFinished, isInitializing, isLockedWhenLoading, isRunnable, isSuccess, isWaiting, removeStackIndex, setAbortFailure, setChildrenLatch, setExecuted, setFailure, setFailure, setLastUpdate, setNonceKey, setOwner, setOwner, setParentProcId, setProcId, setResult, setRootProcId, setStackIndexes, setState, setSubmittedTime, setTimeout, shouldWaitClientAck, skipPersistence, suspend, toString, toStringClass, toStringClassDetails, toStringDetails, toStringSimpleSB, updateMetricsOnFinish, updateMetricsOnSubmit, updateTimestamp, wasExecuted

Methods inherited from class java.lang.Object

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

Methods inherited from interface org.apache.hadoop.hbase.master.procedure.PeerProcedureInterface

getPeerId, getPeerOperationType

Field Details

LOG

private static final org.slf4j.Logger LOG

UPDATE_LAST_SEQ_ID_BATCH_SIZE

protected static final int UPDATE_LAST_SEQ_ID_BATCH_SIZE

See Also:

• Constant Field Values

SLEEP_INTERVAL_MS

protected static final int SLEEP_INTERVAL_MS

See Also:

• Constant Field Values

latch

protected ProcedurePrepareLatch latch

Constructor Details

AbstractPeerProcedure

protected AbstractPeerProcedure()

AbstractPeerProcedure

protected AbstractPeerProcedure(String peerId)

Method Details

getLatch

public ProcedurePrepareLatch getLatch()

acquireLock

protected Procedure.LockState acquireLock(MasterProcedureEnv env)

Description copied from class: Procedure

The user should override this method if they need a lock on an Entity. A lock can be anything, and it is up to the implementor. The Procedure Framework will call this method just before it invokes Procedure.execute(Object). It calls Procedure.releaseLock(Object) after the call to execute.

If you need to hold the lock for the life of the Procedure -- i.e. you do not want any other Procedure interfering while this Procedure is running, see Procedure.holdLock(Object).

Example: in our Master we can execute request in parallel for different tables. We can create t1 and create t2 and these creates can be executed at the same time. Anything else on t1/t2 is queued waiting that specific table create to happen.

There are 3 LockState:

• LOCK_ACQUIRED should be returned when the proc has the lock and the proc is ready to execute.
• LOCK_YIELD_WAIT should be returned when the proc has not the lock and the framework should take care of readding the procedure back to the runnable set for retry
• LOCK_EVENT_WAIT should be returned when the proc has not the lock and someone will take care of readding the procedure back to the runnable set when the lock is available.

Overrides:

acquireLock in class Procedure<MasterProcedureEnv>

Returns:

the lock state as described above.

releaseLock

protected void releaseLock(MasterProcedureEnv env)

Description copied from class: Procedure

The user should override this method, and release lock if necessary.

Overrides:

releaseLock in class Procedure<MasterProcedureEnv>

holdLock

protected boolean holdLock(MasterProcedureEnv env)

Description copied from class: Procedure

Used to keep the procedure lock even when the procedure is yielding or suspended.

Overrides:

holdLock in class Procedure<MasterProcedureEnv>

Returns:

true if the procedure should hold on the lock until completionCleanup()

refreshPeer

protected final void refreshPeer(MasterProcedureEnv env,
 PeerProcedureInterface.PeerOperationType type)

enablePeer

protected void enablePeer(MasterProcedureEnv env)
                   throws ReplicationException

Throws:

ReplicationException

addToMap

private void addToMap(Map<String,Long> lastSeqIds,
 String encodedRegionName,
 long barrier,
 ReplicationQueueStorage queueStorage)
               throws ReplicationException

Throws:

ReplicationException

setLastPushedSequenceId

protected final void setLastPushedSequenceId(MasterProcedureEnv env,
 ReplicationPeerConfig peerConfig)
                                      throws IOException,
ReplicationException

Throws:

IOException

ReplicationException

needSetLastPushedSequenceId

private boolean needSetLastPushedSequenceId(TableStateManager tsm,
 TableName tn)
                                     throws IOException

Throws:

IOException

setLastPushedSequenceIdForTable

protected final void setLastPushedSequenceIdForTable(MasterProcedureEnv env,
 TableName tableName,
 Map<String,Long> lastSeqIds)
                                              throws IOException,
ReplicationException

Throws:

IOException

ReplicationException

checkPeerModificationEnabled

protected final void checkPeerModificationEnabled(MasterProcedureEnv env)
                                           throws IOException

Throws:

IOException