Package org.elasticsearch.common.util.concurrent

Class AbstractAsyncTask

org.elasticsearch.common.util.concurrent.AbstractAsyncTask
All Implemented Interfaces:
, ,
public abstract class AbstractAsyncTask extends implements ,
A base class for tasks that need to repeat.

  • Constructor Summary

    Constructors
    Modifier
    Constructor
    Description
    protected
    AbstractAsyncTask​(org.apache.logging.log4j.Logger logger, ThreadPool threadPool, org.elasticsearch.core.TimeValue interval, boolean autoReschedule)
     

  • Method Summary

    Modifier and Type
    Method
    Description
    void
    cancel()
    Cancel any scheduled run, but do not prevent subsequent restarts.
    void
    close()
    Cancel any scheduled run
    org.elasticsearch.core.TimeValue
    getInterval()
     
    protected
    getThreadPool()
    Use the same threadpool by default.
    boolean
    isClosed()
     
    boolean
    isScheduled()
     
    protected abstract boolean
    mustReschedule()
    Test any external conditions that determine whether the task should be scheduled.
    void
    rescheduleIfNecessary()
    Schedule the task to run after the configured interval if it is not closed and any further conditions imposed by derived classes are met.
    void
    run()
     
    protected abstract void
    runInternal()
     
    void
    setInterval​(org.elasticsearch.core.TimeValue interval)
    Change the interval between runs.

    Methods inherited from class java.lang.

    , , , , , , , , , ,

  • Constructor Details

    • AbstractAsyncTask

      protected AbstractAsyncTask​(org.apache.logging.log4j.Logger logger, ThreadPool threadPool, org.elasticsearch.core.TimeValue interval, boolean autoReschedule)

  • Method Details

    • setInterval

      public void setInterval​(org.elasticsearch.core.TimeValue interval)
      Change the interval between runs. If a future run is scheduled then this will reschedule it.
      Parameters:
      interval - The new interval between runs.

    • getInterval

      public org.elasticsearch.core.TimeValue getInterval()

    • mustReschedule

      protected abstract boolean mustReschedule()
      Test any external conditions that determine whether the task should be scheduled. This method does *not* need to test if the task is closed, as being closed automatically prevents scheduling.
      Returns:
      Should the task be scheduled to run?

    • rescheduleIfNecessary

      public void rescheduleIfNecessary()
      Schedule the task to run after the configured interval if it is not closed and any further conditions imposed by derived classes are met. Any previously scheduled invocation is cancelled.

    • isScheduled

      public boolean isScheduled()

    • cancel

      public void cancel()
      Cancel any scheduled run, but do not prevent subsequent restarts.

    • close

      public void close()
      Cancel any scheduled run
      Specified by:
       in interface 
      Specified by:
       in interface 

    • isClosed

      public boolean isClosed()

    • run

      public final void run()
      Specified by:
       in interface 

    • runInternal

      protected abstract void runInternal()

    • getThreadPool

      protected  getThreadPool()
      Use the same threadpool by default. Derived classes can change this if required.