/*
* Copyright 2013 the original author or authors.
*
* 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 org.gradle.api.internal.artifacts.ivyservice;
import org.apache.ivy.Ivy;
import org.apache.ivy.core.IvyContext;
import org.apache.ivy.core.settings.IvySettings;
import org.apache.ivy.util.Message;
import org.gradle.api.Action;
import org.gradle.api.Transformer;
import org.gradle.internal.Transformers;
import java.util.LinkedList;
import java.util.concurrent.locks.Lock;
import java.util.concurrent.locks.ReentrantLock;
public class DefaultIvyContextManager implements IvyContextManager {
private static final int MAX_CACHED_IVY_INSTANCES = 4;
private final Lock lock = new ReentrantLock();
private boolean messageAdapterAttached;
private final LinkedList<Ivy> cached = new LinkedList<Ivy>();
private final ThreadLocal<Integer> depth = new ThreadLocal<Integer>();
public void withIvy(final Action<? super Ivy> action) {
withIvy(Transformers.toTransformer(action));
}
public <T> T withIvy(Transformer<? extends T, ? super Ivy> action) {
Integer currentDepth = depth.get();
if (currentDepth != null) {
depth.set(currentDepth + 1);
try {
return action.transform(IvyContext.getContext().getIvy());
} finally {
depth.set(currentDepth);
}
}
IvyContext.pushNewContext();
try {
depth.set(1);
try {
Ivy ivy = getIvy();
try {
IvyContext.getContext().setIvy(ivy);
return action.transform(ivy);
} finally {
releaseIvy(ivy);
}
} finally {
depth.set(null);
}
} finally {
IvyContext.popContext();
}
}
private Ivy getIvy() {
lock.lock();
try {
if (!cached.isEmpty()) {
return cached.removeFirst();
}
if (!messageAdapterAttached) {
Message.setDefaultLogger(new IvyLoggingAdaper());
messageAdapterAttached = true;
}
} finally {
lock.unlock();
}
return Ivy.newInstance(new IvySettings());
}
private void releaseIvy(Ivy ivy) {
// cleanup
ivy.getSettings().getResolvers().clear();
ivy.getSettings().setDefaultResolver(null);
lock.lock();
try {
if (cached.size() < MAX_CACHED_IVY_INSTANCES) {
cached.add(ivy);
}
// else, throw it away
} finally {
lock.unlock();
}
}
}