ThreadSafeDeltaCache.java

/*
 * Copyright (C) 2010, Google Inc.
 * and other copyright owners as documented in the project's IP log.
 *
 * This program and the accompanying materials are made available
 * under the terms of the Eclipse Distribution License v1.0 which
 * accompanies this distribution, is reproduced below, and is
 * available at http://www.eclipse.org/org/documents/edl-v10.php
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 * without modification, are permitted provided that the following
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 * - Redistributions in binary form must reproduce the above
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 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND
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 * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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package org.eclipse.jgit.internal.storage.pack;

import java.util.concurrent.locks.ReentrantLock;

import org.eclipse.jgit.storage.pack.PackConfig;

class ThreadSafeDeltaCache extends DeltaCache {
	private final ReentrantLock lock;

	ThreadSafeDeltaCache(PackConfig pc) {
		super(pc);
		lock = new ReentrantLock();
	}

	@Override
	boolean canCache(int length, ObjectToPack src, ObjectToPack res) {
		lock.lock();
		try {
			return super.canCache(length, src, res);
		} finally {
			lock.unlock();
		}
	}

	@Override
	void credit(int reservedSize) {
		lock.lock();
		try {
			super.credit(reservedSize);
		} finally {
			lock.unlock();
		}
	}

	@Override
	Ref cache(byte[] data, int actLen, int reservedSize) {
		data = resize(data, actLen);
		lock.lock();
		try {
			return super.cache(data, actLen, reservedSize);
		} finally {
			lock.unlock();
		}
	}
}