| /********************************************************************* |
| * Copyright (c) 2009, 2012 SpringSource, a division of VMware, Inc. |
| * |
| * This program and the accompanying materials are made |
| * available under the terms of the Eclipse Public License 2.0 |
| * which is available at https://www.eclipse.org/legal/epl-2.0/ |
| * |
| * SPDX-License-Identifier: EPL-2.0 |
| **********************************************************************/ |
| |
| package org.eclipse.virgo.ide.bundlor.internal.core; |
| |
| import java.util.Map; |
| import java.util.concurrent.ConcurrentHashMap; |
| import java.util.concurrent.locks.Lock; |
| import java.util.concurrent.locks.ReentrantReadWriteLock; |
| |
| import org.eclipse.jdt.core.IJavaProject; |
| import org.eclipse.virgo.bundlor.support.partialmanifest.ReadablePartialManifest; |
| |
| /** |
| * Manages the {@link IncrementalReadablePartialManifest} instances by {@link IJavaProject}. |
| * |
| * @author Christian Dupuis |
| * @since 1.1.2 |
| */ |
| public class IncrementalPartialManifestManager { |
| |
| /** |
| * Internal read write lock to protect the read and write operations of the internal caches |
| */ |
| private final ReentrantReadWriteLock rwl = new ReentrantReadWriteLock(); |
| |
| /** Write lock to protect the model from concurrent write operations */ |
| private final Lock w = this.rwl.writeLock(); |
| |
| /** Read lock to protect from reading while writing to the model resources */ |
| private final Lock r = this.rwl.readLock(); |
| |
| /** |
| * Internal structure to associate {@link IncrementalReadablePartialManifest}s to {@link IJavaProject}s |
| */ |
| private final Map<IJavaProject, ReadablePartialManifest> manifests = new ConcurrentHashMap<IJavaProject, ReadablePartialManifest>(); |
| |
| /** |
| * Internal structure to associate {@link IncrementalReadablePartialManifest}s that represent the test manifests to |
| * {@link IJavaProject}s |
| */ |
| private final Map<IJavaProject, ReadablePartialManifest> testManifests = new ConcurrentHashMap<IJavaProject, ReadablePartialManifest>(); |
| |
| /** |
| * Returns an instance of {@link IncrementalReadablePartialManifest} for the given {@link IJavaProject}. |
| */ |
| public ReadablePartialManifest getPartialManifest(IJavaProject javaProject, boolean isTestManifest, boolean createNew) { |
| if (!createNew) { |
| try { |
| this.r.lock(); |
| if (!isTestManifest) { |
| if (this.manifests.containsKey(javaProject)) { |
| return this.manifests.get(javaProject); |
| } |
| } else { |
| if (this.testManifests.containsKey(javaProject)) { |
| return this.testManifests.get(javaProject); |
| } |
| } |
| } finally { |
| this.r.unlock(); |
| } |
| } |
| try { |
| this.w.lock(); |
| ReadablePartialManifest manifest = new IncrementalReadablePartialManifest(); |
| if (!isTestManifest) { |
| this.manifests.put(javaProject, manifest); |
| } else { |
| this.testManifests.put(javaProject, manifest); |
| } |
| return manifest; |
| } finally { |
| this.w.unlock(); |
| } |
| } |
| |
| /** |
| * Returns <code>true</code> if the given {@link IJavaProject} has {@link IncrementalReadablePartialManifest} |
| * associated with it. |
| */ |
| public boolean hasPartialManifest(IJavaProject javaProject) { |
| try { |
| this.r.lock(); |
| return this.manifests.containsKey(javaProject); |
| } finally { |
| this.r.unlock(); |
| } |
| } |
| |
| /** |
| * Clears out existing manifest models. |
| * <p> |
| * Used form the UI to trigger a clean model creation on the next run. |
| */ |
| public void clearPartialManifest(IJavaProject javaProject) { |
| try { |
| this.w.lock(); |
| this.manifests.remove(javaProject); |
| this.testManifests.remove(javaProject); |
| } finally { |
| this.w.unlock(); |
| } |
| } |
| |
| } |