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/*
* Copyright 2007 - 2018 ETH Zuerich, CISD and SIS.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package ch.systemsx.cisd.hdf5.cleanup;
import java.util.ArrayList;
import java.util.List;
/**
* A class that allows registering items for clean up and that allows to perform the clean up later.
* <p>
* <em>This is an internal implementation class that is not meant to be used by users of the library.</em>
*
* @author Bernd Rinn
*/
public class CleanUpRegistry implements ICleanUpRegistry
{
private final List<Runnable> cleanUpList = new ArrayList<Runnable>();
/**
* Creates a synchronized version of a {@link CleanUpRegistry}.
*/
public static CleanUpRegistry createSynchonized()
{
return new CleanUpRegistry()
{
@Override
public synchronized void registerCleanUp(Runnable cleanUp)
{
super.registerCleanUp(cleanUp);
}
@Override
public synchronized void cleanUp(boolean suppressExceptions)
{
super.cleanUp(suppressExceptions);
}
};
}
@Override
public void registerCleanUp(Runnable cleanUp)
{
cleanUpList.add(cleanUp);
}
/**
* Performs all clean-ups registered with {@link #registerCleanUp(Runnable)}.
*
* @param suppressExceptions If <code>true</code>, all exceptions that happen during clean-up
* will be suppressed.
*/
public void cleanUp(boolean suppressExceptions)
{
RuntimeException exceptionDuringCleanUp = null;
for (int i = cleanUpList.size() - 1; i >= 0; --i)
{
final Runnable runnable = cleanUpList.get(i);
try
{
runnable.run();
} catch (RuntimeException ex)
{
if (suppressExceptions == false && exceptionDuringCleanUp == null)
{
exceptionDuringCleanUp = ex;
}
}
}
cleanUpList.clear();
if (exceptionDuringCleanUp != null)
{
throw exceptionDuringCleanUp;
}
}
}
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