org.apache.hadoop.hbase.master.assignment

Class GCMultipleMergedRegionsProcedure

java.lang.Object

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

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

org.apache.hadoop.hbase.master.procedure.AbstractStateMachineTableProcedure<MasterProcedureProtos.GCMergedRegionsState>

org.apache.hadoop.hbase.master.assignment.GCMultipleMergedRegionsProcedure

All Implemented Interfaces:

Comparable<Procedure<MasterProcedureEnv>>, TableProcedureInterface

@InterfaceAudience.Private
public class GCMultipleMergedRegionsProcedure
extends AbstractStateMachineTableProcedure<MasterProcedureProtos.GCMergedRegionsState>

GC regions that have been Merged. Caller determines if it is GC time. This Procedure does not check. This is a Table Procedure. We take a read lock on the Table. We do NOT keep a lock for the life of this procedure. The sub-procedures take locks on the Regions they are purging. Replaces a Procedure that did two regions only at a time instead doing multiple merges in the one go; only difference from the old MasterProcedureProtos.GCMergedRegionsState is the serialization; this class has a different serialization profile writing out more than just two regions.

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.TableProcedureInterface

TableProcedureInterface.TableOperationType

Field Summary

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

Constructor and Description
GCMultipleMergedRegionsProcedure()
GCMultipleMergedRegionsProcedure(MasterProcedureEnv env, RegionInfo mergedChild, List<RegionInfo> parents)

Method Summary

Modifier and Type	Method and Description
protected void	deserializeStateData(ProcedureStateSerializer serializer)
protected StateMachineProcedure.Flow	executeFromState(MasterProcedureEnv env, MasterProcedureProtos.GCMergedRegionsState state)
protected MasterProcedureProtos.GCMergedRegionsState	getInitialState()
protected MasterProcedureProtos.GCMergedRegionsState	getState(int stateId)
protected int	getStateId(MasterProcedureProtos.GCMergedRegionsState state)
TableName	getTableName()
TableProcedureInterface.TableOperationType	getTableOperationType() Given an operation type we can take decisions about what to do with pending operations.
protected void	rollbackState(MasterProcedureEnv env, MasterProcedureProtos.GCMergedRegionsState state)
protected void	serializeStateData(ProcedureStateSerializer serializer)
void	toStringClassDetails(StringBuilder sb)

Methods inherited from class org.apache.hadoop.hbase.master.procedure.AbstractStateMachineTableProcedure

acquireLock, checkOnline, checkTableModifiable, getUser, getWALRegionDir, preflightChecks, releaseLock, releaseSyncLatch, setUser, waitInitialized

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

abort, addChildProcedure, execute, failIfAborted, getCurrentState, getCurrentStateId, getCycles, isEofState, isRollbackSupported, isYieldAfterExecutionStep, isYieldBeforeExecuteFromState, rollback, setNextState, toStringState

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

addStackIndex, afterReplay, 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, holdLock, incChildrenLatch, isBypass, isFailed, isFinished, isInitializing, isLockedWhenLoading, isRunnable, isSuccess, isWaiting, removeStackIndex, setAbortFailure, setChildrenLatch, setFailure, setFailure, setLastUpdate, setNonceKey, setOwner, setOwner, setParentProcId, setProcId, setResult, setRootProcId, setStackIndexes, setState, setSubmittedTime, setTimeout, setTimeoutFailure, shouldWaitClientAck, skipPersistence, toString, toStringClass, toStringDetails, toStringSimpleSB, updateMetricsOnFinish, updateMetricsOnSubmit, updateTimestamp, wasExecuted

Methods inherited from class java.lang.Object

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

Constructor Detail

GCMultipleMergedRegionsProcedure

public GCMultipleMergedRegionsProcedure(MasterProcedureEnv env,
                                        RegionInfo mergedChild,
                                        List<RegionInfo> parents)

GCMultipleMergedRegionsProcedure

public GCMultipleMergedRegionsProcedure()

Method Detail

getTableOperationType

public TableProcedureInterface.TableOperationType getTableOperationType()

Description copied from interface: TableProcedureInterface

Given an operation type we can take decisions about what to do with pending operations. e.g. if we get a delete and we have some table operation pending (e.g. add column) we can abort those operations.

Specified by:

getTableOperationType in interface TableProcedureInterface

Specified by:

getTableOperationType in class AbstractStateMachineTableProcedure<MasterProcedureProtos.GCMergedRegionsState>

Returns:

the operation type that the procedure is executing.

executeFromState

protected StateMachineProcedure.Flow executeFromState(MasterProcedureEnv env,
                                                      MasterProcedureProtos.GCMergedRegionsState state)
                                               throws ProcedureSuspendedException,
                                                      ProcedureYieldException,
                                                      InterruptedException

Specified by:

executeFromState in class StateMachineProcedure<MasterProcedureEnv,MasterProcedureProtos.GCMergedRegionsState>

Throws:

ProcedureSuspendedException

ProcedureYieldException

InterruptedException

rollbackState

protected void rollbackState(MasterProcedureEnv env,
                             MasterProcedureProtos.GCMergedRegionsState state)
                      throws IOException,
                             InterruptedException

Specified by:

rollbackState in class StateMachineProcedure<MasterProcedureEnv,MasterProcedureProtos.GCMergedRegionsState>

Throws:

IOException

InterruptedException

getState

protected MasterProcedureProtos.GCMergedRegionsState getState(int stateId)

Specified by:

getState in class StateMachineProcedure<MasterProcedureEnv,MasterProcedureProtos.GCMergedRegionsState>

getStateId

protected int getStateId(MasterProcedureProtos.GCMergedRegionsState state)

Specified by:

getStateId in class StateMachineProcedure<MasterProcedureEnv,MasterProcedureProtos.GCMergedRegionsState>

getInitialState

protected MasterProcedureProtos.GCMergedRegionsState getInitialState()

Specified by:

getInitialState in class StateMachineProcedure<MasterProcedureEnv,MasterProcedureProtos.GCMergedRegionsState>

serializeStateData

protected void serializeStateData(ProcedureStateSerializer serializer)
                           throws IOException

Overrides:

serializeStateData in class StateMachineProcedure<MasterProcedureEnv,MasterProcedureProtos.GCMergedRegionsState>

Throws:

IOException

deserializeStateData

protected void deserializeStateData(ProcedureStateSerializer serializer)
                             throws IOException

Overrides:

deserializeStateData in class StateMachineProcedure<MasterProcedureEnv,MasterProcedureProtos.GCMergedRegionsState>

Throws:

IOException

toStringClassDetails

public void toStringClassDetails(StringBuilder sb)

Overrides:

toStringClassDetails in class AbstractStateMachineTableProcedure<MasterProcedureProtos.GCMergedRegionsState>

getTableName

public TableName getTableName()

Specified by:

getTableName in interface TableProcedureInterface

Specified by:

getTableName in class AbstractStateMachineTableProcedure<MasterProcedureProtos.GCMergedRegionsState>

Returns:

the name of the table the procedure is operating on