Class DistThreadPool

java.lang.Object
edu.jas.util.DistThreadPool
public class DistThreadPool extends Object
Distributed thread pool. Using stack / list work-pile and Executable Channels and Servers.
Author:
Heinz Kredel

  • Field Details

    • threads

      protected final int threads
      Number of threads to use.

    • workers

      protected edu.jas.util.DistPoolThread[] workers
      Array of workers.

    • idleworkers

      protected int idleworkers
      Number of idle workers.

    • jobstack

      protected LinkedList<Runnable> jobstack
      Work queue / stack.

    • strategy

      protected StrategyEnumeration strategy

  • Constructor Details

    • DistThreadPool

      public DistThreadPool()
      Constructs a new DistThreadPool with strategy StrategyEnumeration.FIFO and size DEFAULT_SIZE.

    • DistThreadPool

      public DistThreadPool(StrategyEnumeration strategy)
      Constructs a new DistThreadPool with size DEFAULT_SIZE.
      Parameters:
      strategy - for job processing.

    • DistThreadPool

      public DistThreadPool(int size)
      Constructs a new DistThreadPool with strategy StrategyEnumeration.FIFO.
      Parameters:
      size - of the pool.

    • DistThreadPool

      public DistThreadPool(int size, String mfile)
      Constructs a new DistThreadPool with strategy StrategyEnumeration.FIFO.
      Parameters:
      size - of the pool.
      mfile - machine file.

    • DistThreadPool

      public DistThreadPool(StrategyEnumeration strategy, int size, String mfile)
      Constructs a new DistThreadPool.
      Parameters:
      strategy - for job processing.
      size - of the pool.
      mfile - machine file.

  • Method Details

    • toString

      public String toString()
      String representation.
      Overrides:
      toString in class Object

    • init

      public void init()
      thread initialization and start.

    • getNumber

      public int getNumber()
      number of worker threads.

    • getStrategy

      public StrategyEnumeration getStrategy()
      get used strategy.

    • getEC

      public ExecutableChannels getEC()
      the used executable channel.

    • terminate

      public void terminate(boolean shutDown)
      Terminates the threads.
      Parameters:
      shutDown - true, if shut-down of the remote executable servers is requested, false, if remote executable servers stay alive.

    • terminate

      public void terminate()
      Terminates the threads.

    • addJob

      public void addJob(Runnable job)
      adds a job to the workpile.
      Parameters:
      job -

    • getJob

      protected Runnable getJob() throws InterruptedException
      get a job for processing.
      Throws:
      InterruptedException

    • hasJobs

      public boolean hasJobs()
      check if there are jobs for processing.

    • hasJobs

      public boolean hasJobs(int n)
      check if there are more than n jobs for processing.
      Parameters:
      n - Integer
      Returns:
      true, if there are possibly more than n jobs.