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/* |
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* @(#)CannotExecuteHandler.java |
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*/ |
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|
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package java.util.concurrent; |
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|
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/** |
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* A handler for tasks that cannot be executed by a {@link ThreadedExecutor}. |
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* |
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* @since 1.5 |
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* |
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* @spec JSR-166 |
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* @revised $Date: 2003/02/26 10:48:09 $ |
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* @editor $Author: jozart $ |
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*/ |
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public interface CannotExecuteHandler { |
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|
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/** |
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* Method invoked by <tt>ThreadedExecutor</tt> when <tt>execute</tt> cannot |
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* submit a task. This may occur when no more threads or queue slots are |
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* available because their bounds would be exceeded, or upon |
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* shutdown of the Executor. The <tt>isShutdown</tt> parameter can be |
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* used to distinguish between these cases. |
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* |
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* Returns false if <tt>execute</tt> should be retried, else true. |
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* You may alternatively throw an unchecked <tt>CannotExecuteException</tt>, |
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* which will be propagated to the caller of <tt>execute</tt>. |
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* |
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* @param r the runnable task requested to be executed |
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* @param isShutdown true if the ThreadExecutor has been shutdown |
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* @return false if <tt>execute</tt> should be retried, else true |
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* @throws CannotExecuteException if there is no remedy |
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*/ |
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boolean cannotExecute(Runnable r, boolean isShutdown); |
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} |
