Package org.camunda.bpm.engine.impl.jobexecutor

Class JobExecutor

  • Direct Known Subclasses:
    RuntimeContainerJobExecutor, ThreadPoolJobExecutor
    public abstract class JobExecutor
extends Object

    Interface to the component responsible for performing background work (Jobs).

    The JobExecutor is capable of dispatching to multiple process engines, ie. multiple process engines can share a single Thread Pool for performing Background Work.

    In clustered situations, you can have multiple Job Executors running against the same queue + pending job list.

    Author:
    Daniel Meyer

    • Field Detail

      • jobAcquisitionThread

        protected Thread jobAcquisitionThread

      • isAutoActivate

        protected boolean isAutoActivate

      • isActive

        protected boolean isActive

      • maxJobsPerAcquisition

        protected int maxJobsPerAcquisition

      • waitTimeInMillis

        protected int waitTimeInMillis

      • waitIncreaseFactor

        protected float waitIncreaseFactor

      • maxWait

        protected long maxWait

      • backoffTimeInMillis

        protected int backoffTimeInMillis

      • maxBackoff

        protected long maxBackoff

      • backoffDecreaseThreshold

        protected int backoffDecreaseThreshold
        The number of job acquisition cycles without locking failures until the backoff level is reduced.

      • lockOwner

        protected String lockOwner

      • lockTimeInMillis

        protected int lockTimeInMillis

    • Constructor Detail

      • JobExecutor

        public JobExecutor()

    • Method Detail

      • start

        public void start()

      • shutdown

        public void shutdown()

      • ensureInitialization

        protected void ensureInitialization()

      • ensureCleanup

        protected void ensureCleanup()

      • jobWasAdded

        public void jobWasAdded()

      • registerProcessEngine

        public void registerProcessEngine​(ProcessEngineImpl processEngine)

      • unregisterProcessEngine

        public void unregisterProcessEngine​(ProcessEngineImpl processEngine)

      • startExecutingJobs

        protected abstract void startExecutingJobs()

      • stopExecutingJobs

        protected abstract void stopExecutingJobs()

      • logAcquisitionAttempt

        public void logAcquisitionAttempt​(ProcessEngineImpl engine)

      • logAcquiredJobs

        public void logAcquiredJobs​(ProcessEngineImpl engine,
                            int numJobs)

      • logAcquisitionFailureJobs

        public void logAcquisitionFailureJobs​(ProcessEngineImpl engine,
                                      int numJobs)

      • logRejectedExecution

        public void logRejectedExecution​(ProcessEngineImpl engine,
                                 int numJobs)

      • engineIterator

        public Iterator<ProcessEngineImpl> engineIterator()
        Must return an iterator of registered process engines that is independent of concurrent modifications to the underlying data structure of engines.

      • hasRegisteredEngine

        public boolean hasRegisteredEngine​(ProcessEngineImpl engine)

      • getWaitTimeInMillis

        public int getWaitTimeInMillis()

      • setWaitTimeInMillis

        public void setWaitTimeInMillis​(int waitTimeInMillis)

      • getBackoffTimeInMillis

        public int getBackoffTimeInMillis()

      • setBackoffTimeInMillis

        public void setBackoffTimeInMillis​(int backoffTimeInMillis)

      • getLockTimeInMillis

        public int getLockTimeInMillis()

      • setLockTimeInMillis

        public void setLockTimeInMillis​(int lockTimeInMillis)

      • getLockOwner

        public String getLockOwner()

      • setLockOwner

        public void setLockOwner​(String lockOwner)

      • isAutoActivate

        public boolean isAutoActivate()

      • setAutoActivate

        public void setAutoActivate​(boolean isAutoActivate)

      • getMaxJobsPerAcquisition

        public int getMaxJobsPerAcquisition()

      • setMaxJobsPerAcquisition

        public void setMaxJobsPerAcquisition​(int maxJobsPerAcquisition)

      • getWaitIncreaseFactor

        public float getWaitIncreaseFactor()

      • setWaitIncreaseFactor

        public void setWaitIncreaseFactor​(float waitIncreaseFactor)

      • getMaxWait

        public long getMaxWait()

      • setMaxWait

        public void setMaxWait​(long maxWait)

      • getMaxBackoff

        public long getMaxBackoff()

      • setMaxBackoff

        public void setMaxBackoff​(long maxBackoff)

      • getBackoffDecreaseThreshold

        public int getBackoffDecreaseThreshold()

      • setBackoffDecreaseThreshold

        public void setBackoffDecreaseThreshold​(int backoffDecreaseThreshold)

      • getName

        public String getName()

      • isActive

        public boolean isActive()

      • setRejectedJobsHandler

        public void setRejectedJobsHandler​(RejectedJobsHandler rejectedJobsHandler)

      • startJobAcquisitionThread

        protected void startJobAcquisitionThread()

      • stopJobAcquisitionThread

        protected void stopJobAcquisitionThread()