@InterfaceAudience.Private @InterfaceStability.Evolving public abstract class SequentialProcedure<TEnvironment> extends Procedure<TEnvironment>
-> Step 1 -> Step 2 -> Step 3The main difference from a base Procedure is that the execute() of a SequentialProcedure will be called only once; there will be no second execute() call once the children are finished. which means once the child of a SequentialProcedure are completed the SequentialProcedure is completed too.
Procedure.LockStateNO_PROC_ID, NO_TIMEOUT| Constructor and Description |
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SequentialProcedure() |
| Modifier and Type | Method and Description |
|---|---|
protected void |
deserializeStateData(ProcedureStateSerializer serializer)
Called on store load to allow the user to decode the previously serialized
state.
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protected Procedure[] |
doExecute(TEnvironment env)
Internal method called by the ProcedureExecutor that starts the user-level code execute().
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protected void |
doRollback(TEnvironment env)
Internal method called by the ProcedureExecutor that starts the user-level code rollback().
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protected void |
serializeStateData(ProcedureStateSerializer serializer)
The user-level code of the procedure may have some state to
persist (e.g.
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abort, acquireLock, addStackIndex, afterReplay, beforeReplay, bypass, compareTo, completionCleanup, elapsedTime, execute, 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, isYieldAfterExecutionStep, releaseLock, removeStackIndex, rollback, setAbortFailure, setChildrenLatch, setFailure, setFailure, setLastUpdate, setNonceKey, setOwner, setOwner, setParentProcId, setProcId, setResult, setRootProcId, setStackIndexes, setState, setSubmittedTime, setTimeout, setTimeoutFailure, shouldWaitClientAck, skipPersistence, toString, toStringClass, toStringClassDetails, toStringDetails, toStringSimpleSB, toStringState, updateMetricsOnFinish, updateMetricsOnSubmit, updateTimestamp, waitInitialized, wasExecutedprotected Procedure[] doExecute(TEnvironment env) throws ProcedureYieldException, ProcedureSuspendedException, InterruptedException
ProceduredoExecute in class Procedure<TEnvironment>ProcedureSuspendedException - This is used when procedure wants to halt processing and
skip out without changing states or releasing any locks held.ProcedureYieldExceptionInterruptedExceptionprotected void doRollback(TEnvironment env) throws IOException, InterruptedException
ProceduredoRollback in class Procedure<TEnvironment>IOExceptionInterruptedExceptionprotected void serializeStateData(ProcedureStateSerializer serializer) throws IOException
ProcedureserializeStateData in class Procedure<TEnvironment>serializer - stores the serializable stateIOExceptionprotected void deserializeStateData(ProcedureStateSerializer serializer) throws IOException
ProceduredeserializeStateData in class Procedure<TEnvironment>serializer - contains the serialized stateIOExceptionCopyright © 2007–2019 Cloudera. All rights reserved.