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/*
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you 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.apache.maven.project;
import javax.inject.Named;
import javax.inject.Singleton;
import java.util.Collections;
import java.util.List;
import java.util.Map;
import java.util.Objects;
import java.util.concurrent.ConcurrentHashMap;
import org.codehaus.plexus.classworlds.realm.ClassRealm;
import org.codehaus.plexus.classworlds.realm.NoSuchRealmException;
import org.codehaus.plexus.personality.plexus.lifecycle.phase.Disposable;
import org.eclipse.aether.graph.DependencyFilter;
/**
* Default project realm cache implementation. Assumes cached data does not change.
*/
@Named
@Singleton
public class DefaultProjectRealmCache implements ProjectRealmCache, Disposable {
/**
* CacheKey
*/
protected static class CacheKey implements Key {
private final List<? extends ClassRealm> extensionRealms;
private final int hashCode;
public CacheKey(List<? extends ClassRealm> extensionRealms) {
this.extensionRealms =
(extensionRealms != null) ? Collections.unmodifiableList(extensionRealms) : Collections.emptyList();
this.hashCode = this.extensionRealms.hashCode();
}
@Override
public int hashCode() {
return hashCode;
}
@Override
public boolean equals(Object o) {
if (o == this) {
return true;
}
if (!(o instanceof CacheKey)) {
return false;
}
CacheKey other = (CacheKey) o;
return extensionRealms.equals(other.extensionRealms);
}
@Override
public String toString() {
return extensionRealms.toString();
}
}
protected final Map<Key, CacheRecord> cache = new ConcurrentHashMap<>();
@Override
public Key createKey(List<? extends ClassRealm> extensionRealms) {
return new CacheKey(extensionRealms);
}
public CacheRecord get(Key key) {
return cache.get(key);
}
public CacheRecord put(Key key, ClassRealm projectRealm, DependencyFilter extensionArtifactFilter) {
Objects.requireNonNull(projectRealm, "projectRealm cannot be null");
if (cache.containsKey(key)) {
throw new IllegalStateException("Duplicate project realm for extensions " + key);
}
CacheRecord record = new CacheRecord(projectRealm, extensionArtifactFilter);
cache.put(key, record);
return record;
}
public void flush() {
for (CacheRecord record : cache.values()) {
ClassRealm realm = record.getRealm();
try {
realm.getWorld().disposeRealm(realm.getId());
} catch (NoSuchRealmException e) {
// ignore
}
}
cache.clear();
}
public void register(MavenProject project, Key key, CacheRecord record) {
// default cache does not track record usage
}
@Override
public void dispose() {
flush();
}
}