Package com.tangosol.net

Class AbstractInvocable

java.lang.Object
com.tangosol.util.Base
com.tangosol.net.AbstractInvocable
All Implemented Interfaces:
Invocable, InvocableInOrder, PriorityTask, Serializable, Runnable
public abstract class AbstractInvocable extends Base implements Invocable, InvocableInOrder, PriorityTask, Serializable
An abstract base for Invocable and PriorityTask implementations.
Since:
Coherence 2.2
Author:
gg 2003.03.31, 2007.03.11
See Also:

  • Constructor Details

    • AbstractInvocable

      public AbstractInvocable()

  • Method Details

    • init

      public void init(InvocationService service)
      Called by the InvocationService exactly once on this Invocable object as part of its initialization.
      Specified by:
      init in interface Invocable
      Parameters:
      service - the containing InvocationService

    • getResult

      public Object getResult()
      Determine the result from the invocation of this object. This method is called by the InvocationService after the run method returns.
      Specified by:
      getResult in interface Invocable
      Returns:
      the invocation result, if any

    • isRespondInOrder

      public boolean isRespondInOrder()
      Determine whether this Invocable object has to preserve the order of responses according to the order of requests.

      This implementation returns "false".

      Specified by:
      isRespondInOrder in interface InvocableInOrder
      Returns:
      true if the response order must be preserved; false otherwise

    • getSchedulingPriority

      public int getSchedulingPriority()
      Obtain this task's scheduling priority. Valid values are one of the SCHEDULE_* constants.

      This implementation returns SCHEDULE_STANDARD.

      Specified by:
      getSchedulingPriority in interface PriorityTask
      Returns:
      this task's scheduling priority

    • getExecutionTimeoutMillis

      public long getExecutionTimeoutMillis()
      Obtain the maximum amount of time this task is allowed to run before the corresponding service will attempt to stop it.

      The value of TIMEOUT_DEFAULT indicates a default timeout value configured for the corresponding service; the value of TIMEOUT_NONE indicates that this task can execute indefinitely.

      If, by the time the specified amount of time passed, the task has not finished, the service will attempt to stop the execution by using the Thread.interrupt() method. In the case that interrupting the thread does not result in the task's termination, the PriorityTask.runCanceled(boolean) method will be called.

      This implementation returns TIMEOUT_DEFAULT.

      Specified by:
      getExecutionTimeoutMillis in interface PriorityTask
      Returns:
      the execution timeout value in milliseconds or one of the special TIMEOUT_* values

    • runCanceled

      public void runCanceled(boolean fAbandoned)
      This method will be called if and only if all attempts to interrupt this task were unsuccessful in stopping the execution or if the execution was canceled before it had a chance to run at all.

      Since this method is usually called on a service thread, implementors must exercise extreme caution since any delay introduced by the implementation will cause a delay of the corresponding service.

      This implementation is a no-op.

      Specified by:
      runCanceled in interface PriorityTask
      Parameters:
      fAbandoned - true if the task has timed-out, but all attempts to interrupt it were unsuccessful in stopping the execution; otherwise the task was never started

    • getRequestTimeoutMillis

      public long getRequestTimeoutMillis()
      Obtain the maximum amount of time a calling thread is willing to wait for a result of the request execution. The request time is measured on the client side as the time elapsed from the moment a request is sent for execution to the corresponding server node(s) and includes:
      • the time it takes to deliver the request to the executing node(s);
      • the interval between the time the task is received and placed into a service queue until the execution starts;
      • the task execution time;
      • the time it takes to deliver a result back to the client.

      The value of TIMEOUT_DEFAULT indicates a default timeout value configured for the corresponding service; the value of TIMEOUT_NONE indicates that the client thread is willing to wait indefinitely until the task execution completes or is canceled by the service due to a task execution timeout specified by the PriorityTask.getExecutionTimeoutMillis() value.

      If the specified amount of time elapsed and the client has not received any response from the server, an RequestTimeoutException will be thrown to the caller.

      This implementation returns TIMEOUT_DEFAULT.

      Specified by:
      getRequestTimeoutMillis in interface PriorityTask
      Returns:
      the request timeout value in milliseconds or one of the special TIMEOUT_* values

    • getService

      public InvocationService getService()
      Obtain the containing InvocationService.
      Returns:
      the containing InvocationService

    • setResult

      protected void setResult(Object oResult)
      Set the result of the invocation.
      Parameters:
      oResult - the invocation result