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/*
* Copyright (c) 2006, 2007 Israfil Consulting Services Corporation
* Copyright (c) 2006, 2007 Christian Edward Gruber
* All Rights Reserved
*
* This software is licensed under the Berkeley Standard Distribution license,
* (BSD license), as defined below:
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* 1. Redistributions of source code must retain the above copyright notice, this
* list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
* 3. Neither the name of Israfil Consulting Services nor the names of its contributors
* may be used to endorse or promote products derived from this software without
* specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
* IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
* INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA,
* OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY
* OF SUCH DAMAGE.
*
* $Id: Source.java 129 2006-12-31 23:20:02Z cgruber $
*/
package net.israfil.foundation.concurrent;
import java.util.concurrent.TimeUnit;
/**
* An object that consumes an object and processes it, then produces the result
* upon request. If the processor has no item in processing, it may consume
* an item. If the processor has an item it produces it when requested. In
* the converse cases the behaviour of the object depends on whether the
* processor is in its on state or its off state.
*
* @author <a href="mailto:cgruber@israfil.net">Christian Edward Gruber </a>
*/
public class ProcessingPipe<I,O> extends AbstractPipe<I,O> {
protected Processor<I,O> processor;
protected Integer timeout;
protected TimeUnit timeoutUnit;
public ProcessingPipe() {}
public Processor<I,O> getProcessor() { return processor; }
public void setProcessor(Processor<I,O> processor) {
this.processor = processor;
}
public Integer getTimeout() { return timeout; }
public void setTimeout(Integer timeout) { this.timeout = timeout; }
public TimeUnit getTimeoutUnit() { return timeoutUnit; }
public void setTimeoutUnit(TimeUnit timeoutUnit) {
this.timeoutUnit = timeoutUnit;
}
public void consume(I item, long timeout, TimeUnit unit) throws InterruptedException {
validateTimeout(timeout,unit);
try {
if (timeout > 0) getQueue().offer(item,timeout,unit);
else getQueue().put(item);
} catch (InterruptedException e) {
throw e;
}
}
public O produce(long timeout, TimeUnit unit) throws InterruptedException {
validateTimeout(timeout,unit);
O processedItem = null;
try {
if (timeout > 0)
processedItem = this.processor.process(getQueue().poll(timeout,unit),getTimeout(),getTimeoutUnit());
else
processedItem = this.processor.process(getQueue().poll(),getTimeout(),getTimeoutUnit());
} catch (InterruptedException e) {
throw e;
}
return processedItem;
}
}
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