Package org.apache.iotdb.confignode.procedure.impl.node

Class RemoveDataNodesProcedure

java.lang.Object

org.apache.iotdb.confignode.procedure.Procedure<Env>

org.apache.iotdb.confignode.procedure.impl.StateMachineProcedure<ConfigNodeProcedureEnv,TState>

org.apache.iotdb.confignode.procedure.impl.node.AbstractNodeProcedure<RemoveDataNodeState>

org.apache.iotdb.confignode.procedure.impl.node.RemoveDataNodesProcedure

All Implemented Interfaces:

Comparable<Procedure<ConfigNodeProcedureEnv>>

public class RemoveDataNodesProcedure
extends AbstractNodeProcedure<RemoveDataNodeState>

remove data node procedure

Nested Class Summary

Nested classes/interfaces inherited from class org.apache.iotdb.confignode.procedure.impl.StateMachineProcedure

StateMachineProcedure.Flow

Field Summary

Fields inherited from class org.apache.iotdb.confignode.procedure.impl.StateMachineProcedure

isGeneratedByPipe

Fields inherited from class org.apache.iotdb.confignode.procedure.Procedure

NO_PROC_ID, NO_TIMEOUT

Constructor Summary

Constructors

Constructor	Description
RemoveDataNodesProcedure()
RemoveDataNodesProcedure(List<TDataNodeLocation> removedDataNodes, Map<Integer,NodeStatus> nodeStatusMap)

Method Summary

Modifier and Type	Method	Description
protected ProcedureLockState	acquireLock(ConfigNodeProcedureEnv configNodeProcedureEnv)	Acquire a lock, user should override it if necessary.
void	deserialize(ByteBuffer byteBuffer)
boolean	equals(Object that)
protected StateMachineProcedure.Flow	executeFromState(ConfigNodeProcedureEnv env, RemoveDataNodeState state)	Called to perform a single step of the specified 'state' of the procedure.
protected RemoveDataNodeState	getInitialState()	Return the initial state object that will be used for the first call to executeFromState().
List<TDataNodeLocation>	getRemovedDataNodes()
protected RemoveDataNodeState	getState(int stateId)	Convert an ordinal (or state id) to an Enum (or more descriptive) state object.
protected int	getStateId(RemoveDataNodeState removeDataNodeState)	Convert the Enum (or more descriptive) state object to an ordinal (or state id).
int	hashCode()
protected boolean	holdLock(ConfigNodeProcedureEnv env)	Used to keep procedure lock even when the procedure is yielded or suspended.
protected boolean	isRollbackSupported(RemoveDataNodeState state)	Used by the default implementation of abort() to know if the current state can be aborted and rollback can be triggered.
protected void	releaseLock(ConfigNodeProcedureEnv configNodeProcedureEnv)	Release a lock, user should override it if necessary.
protected void	rollbackState(ConfigNodeProcedureEnv env, RemoveDataNodeState state)	Called to perform the rollback of the specified state.
void	serialize(DataOutputStream stream)

Methods inherited from class org.apache.iotdb.confignode.procedure.impl.StateMachineProcedure

addChildProcedure, execute, getCurrentState, getCycles, isEofState, isStateDeserialized, rollback, setNextState, toStringState

Methods inherited from class org.apache.iotdb.confignode.procedure.Procedure

addStackIndex, compareTo, deserializeTypeInfoForCompatibility, doAcquireLock, doExecute, doReleaseLock, doRollback, elapsedTime, getChildrenLatch, getException, getLastUpdate, getParentProcId, getProcId, getProcType, getResult, getRootProcId, getStackIndexes, getState, getSubmittedTime, getTimeout, getTimeoutTimestamp, hasChildren, hasException, hasLock, hasParent, hasTimeout, haveSameParent, incChildrenLatch, isFailed, isFinished, isInitializing, isLockedWhenLoading, isRunnable, isSuccess, isWaiting, isYieldAfterExecution, removeStackIndex, restoreLock, setChildrenLatch, setFailure, setFailure, setLastUpdate, setParentProcId, setProcId, setProcRunnable, setResult, setRootProcedureId, setRootProcId, setStackIndexes, setState, setSubmittedTime, setTimeout, setTimeoutFailure, toString, toStringClassDetails, toStringDetails, toStringSimpleSB, updateMetricsOnFinish, updateMetricsOnSubmit, updateTimestamp, wasExecuted

Methods inherited from class java.lang.Object

clone, finalize, getClass, notify, notifyAll, wait, wait, wait

Constructor Details

RemoveDataNodesProcedure

public RemoveDataNodesProcedure()

RemoveDataNodesProcedure

public RemoveDataNodesProcedure(List<TDataNodeLocation> removedDataNodes,
 Map<Integer,NodeStatus> nodeStatusMap)

Method Details

acquireLock

protected ProcedureLockState acquireLock(ConfigNodeProcedureEnv configNodeProcedureEnv)

Description copied from class: Procedure

Acquire a lock, user should override it if necessary.

Overrides:

acquireLock in class AbstractNodeProcedure<RemoveDataNodeState>

Parameters:

configNodeProcedureEnv - environment

Returns:

state of lock

releaseLock

protected void releaseLock(ConfigNodeProcedureEnv configNodeProcedureEnv)

Description copied from class: Procedure

Release a lock, user should override it if necessary.

Overrides:

releaseLock in class AbstractNodeProcedure<RemoveDataNodeState>

Parameters:

configNodeProcedureEnv - env

executeFromState

protected StateMachineProcedure.Flow executeFromState(ConfigNodeProcedureEnv env,
 RemoveDataNodeState state)

Description copied from class: StateMachineProcedure

Called to perform a single step of the specified 'state' of the procedure.

Specified by:

executeFromState in class StateMachineProcedure<ConfigNodeProcedureEnv,RemoveDataNodeState>

state - state to execute

Returns:

Flow.NO_MORE_STATE if the procedure is completed, Flow.HAS_MORE_STATE if there is another step.

rollbackState

protected void rollbackState(ConfigNodeProcedureEnv env,
 RemoveDataNodeState state)
                      throws IOException,
InterruptedException,
ProcedureException

Description copied from class: StateMachineProcedure

Called to perform the rollback of the specified state.

Specified by:

rollbackState in class StateMachineProcedure<ConfigNodeProcedureEnv,RemoveDataNodeState>

state - state to rollback

Throws:

IOException - temporary failure, the rollback will retry later

InterruptedException

ProcedureException

isRollbackSupported

protected boolean isRollbackSupported(RemoveDataNodeState state)

Description copied from class: StateMachineProcedure

Used by the default implementation of abort() to know if the current state can be aborted and rollback can be triggered.

Overrides:

isRollbackSupported in class StateMachineProcedure<ConfigNodeProcedureEnv,RemoveDataNodeState>

holdLock

protected boolean holdLock(ConfigNodeProcedureEnv env)

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

Overrides:

holdLock in class Procedure<ConfigNodeProcedureEnv>

Parameters:

env - env

Returns:

true if hold the lock

getState

protected RemoveDataNodeState getState(int stateId)

Description copied from class: StateMachineProcedure

Convert an ordinal (or state id) to an Enum (or more descriptive) state object.

Specified by:

getState in class StateMachineProcedure<ConfigNodeProcedureEnv,RemoveDataNodeState>

Parameters:

stateId - the ordinal() of the state enum (or state id)

Returns:

the state enum object

getStateId

protected int getStateId(RemoveDataNodeState removeDataNodeState)

Description copied from class: StateMachineProcedure

Convert the Enum (or more descriptive) state object to an ordinal (or state id).

Specified by:

getStateId in class StateMachineProcedure<ConfigNodeProcedureEnv,RemoveDataNodeState>

Parameters:

removeDataNodeState - the state enum object

Returns:

stateId the ordinal() of the state enum (or state id)

getInitialState

protected RemoveDataNodeState getInitialState()

Description copied from class: StateMachineProcedure

Return the initial state object that will be used for the first call to executeFromState().

Specified by:

getInitialState in class StateMachineProcedure<ConfigNodeProcedureEnv,RemoveDataNodeState>

Returns:

the initial state enum object

serialize

public void serialize(DataOutputStream stream)
               throws IOException

Overrides:

serialize in class StateMachineProcedure<ConfigNodeProcedureEnv,RemoveDataNodeState>

Throws:

IOException

deserialize

public void deserialize(ByteBuffer byteBuffer)

Overrides:

deserialize in class StateMachineProcedure<ConfigNodeProcedureEnv,RemoveDataNodeState>

equals

public boolean equals(Object that)

Overrides:

equals in class Object

hashCode

public int hashCode()

Overrides:

hashCode in class Object

getRemovedDataNodes

public List<TDataNodeLocation> getRemovedDataNodes()