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ConfiguredByContext.java
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ConfiguredByContext.java
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/*
* Copyright (c) 2014, 2024 Oracle and/or its affiliates. All rights reserved.
*
* This program and the accompanying materials are made available under the
* terms of the Eclipse Public License v. 2.0, which is available at
* http://www.eclipse.org/legal/epl-2.0.
*
* This Source Code may also be made available under the following Secondary
* Licenses when the conditions for such availability set forth in the
* Eclipse Public License v. 2.0 are satisfied: GNU General Public License,
* version 2 with the GNU Classpath Exception, which is available at
* https://www.gnu.org/software/classpath/license.html.
*
* SPDX-License-Identifier: EPL-2.0 OR GPL-2.0 WITH Classpath-exception-2.0
*/
package org.glassfish.hk2.configuration.internal;
import java.lang.annotation.Annotation;
import java.util.HashMap;
import java.util.HashSet;
import java.util.Map;
import java.util.Set;
import java.util.concurrent.locks.ReentrantLock;
import jakarta.inject.Singleton;
import org.glassfish.hk2.api.ActiveDescriptor;
import org.glassfish.hk2.api.Context;
import org.glassfish.hk2.api.DescriptorVisibility;
import org.glassfish.hk2.api.MultiException;
import org.glassfish.hk2.api.ServiceHandle;
import org.glassfish.hk2.api.Visibility;
import org.glassfish.hk2.configuration.api.ConfiguredBy;
/**
* @author jwells
*
*/
@Singleton
@Visibility(DescriptorVisibility.LOCAL)
public class ConfiguredByContext implements Context<ConfiguredBy> {
private final static ThreadLocal<ActiveDescriptor<?>> workingOn = ThreadLocal.withInitial(() -> null);
private final ReentrantLock lock = new ReentrantLock();
private final Map<ActiveDescriptor<?>, Object> db = new HashMap<>();
/* (non-Javadoc)
* @see org.glassfish.hk2.api.Context#getScope()
*/
@Override
public Class<? extends Annotation> getScope() {
return ConfiguredBy.class;
}
/* (non-Javadoc)
* @see org.glassfish.hk2.api.Context#findOrCreate(org.glassfish.hk2.api.ActiveDescriptor, org.glassfish.hk2.api.ServiceHandle)
*/
@SuppressWarnings("unchecked")
@Override
public <U> U findOrCreate(ActiveDescriptor<U> activeDescriptor,
ServiceHandle<?> root) {
ActiveDescriptor<U> previousValue = (ActiveDescriptor<U>) workingOn.get();
workingOn.set(activeDescriptor);
try {
return internalFindOrCreate(activeDescriptor, root);
}
finally {
workingOn.set(previousValue);
}
}
/* (non-Javadoc)
* @see org.glassfish.hk2.api.Context#findOrCreate(org.glassfish.hk2.api.ActiveDescriptor, org.glassfish.hk2.api.ServiceHandle)
*/
@SuppressWarnings("unchecked")
private <U> U internalFindOrCreate(ActiveDescriptor<U> activeDescriptor,
ServiceHandle<?> root) {
lock.lock();
try {
U retVal = (U) db.get(activeDescriptor);
if (retVal != null) return retVal;
if (activeDescriptor.getName() == null) {
throw new MultiException(new IllegalStateException("ConfiguredBy services without names are templates and cannot be created directly"));
}
retVal = activeDescriptor.create(root);
db.put(activeDescriptor, retVal);
return retVal;
} finally {
lock.unlock();
}
}
/* (non-Javadoc)
* @see org.glassfish.hk2.api.Context#containsKey(org.glassfish.hk2.api.ActiveDescriptor)
*/
@Override
public boolean containsKey(ActiveDescriptor<?> descriptor) {
lock.lock();
try {
return db.containsKey(descriptor);
} finally {
lock.unlock();
}
}
/* (non-Javadoc)
* @see org.glassfish.hk2.api.Context#destroyOne(org.glassfish.hk2.api.ActiveDescriptor)
*/
@SuppressWarnings("unchecked")
@Override
public void destroyOne(ActiveDescriptor<?> descriptor) {
lock.lock();
try {
Object destroyMe = db.remove(descriptor);
if (destroyMe == null) return;
((ActiveDescriptor<Object>) descriptor).dispose(destroyMe);
} finally {
lock.unlock();
}
}
/* (non-Javadoc)
* @see org.glassfish.hk2.api.Context#supportsNullCreation()
*/
@Override
public boolean supportsNullCreation() {
return false;
}
/* (non-Javadoc)
* @see org.glassfish.hk2.api.Context#isActive()
*/
@Override
public boolean isActive() {
return true;
}
/* (non-Javadoc)
* @see org.glassfish.hk2.api.Context#shutdown()
*/
@Override
public void shutdown() {
lock.lock();
try {
Set<ActiveDescriptor<?>> activeDescriptors = new HashSet<>(db.keySet());
for (ActiveDescriptor<?> killMe : activeDescriptors) {
destroyOne(killMe);
}
} finally {
lock.unlock();
}
}
/* package */ ActiveDescriptor<?> getWorkingOn() {
return workingOn.get();
}
/* package */ Object findOnly(ActiveDescriptor<?> descriptor) {
lock.lock();
try {
return db.get(descriptor);
} finally {
lock.unlock();
}
}
}