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OperationHandleImpl.java
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OperationHandleImpl.java
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/*
* Copyright (c) 2015, 2024 Oracle and/or its affiliates. All rights reserved.
* Copyright (c) 2018 Payara Foundation
*
* 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.extras.operation.internal;
import java.lang.annotation.Annotation;
import java.util.Collections;
import java.util.HashSet;
import java.util.Set;
import java.util.concurrent.locks.ReentrantLock;
import org.glassfish.hk2.api.ServiceLocator;
import org.glassfish.hk2.extras.operation.OperationHandle;
import org.glassfish.hk2.extras.operation.OperationIdentifier;
import org.glassfish.hk2.extras.operation.OperationState;
/**
* @author jwells
*
*/
public class OperationHandleImpl<T extends Annotation> implements OperationHandle<T> {
private final SingleOperationManager<T> parent;
private final OperationIdentifier<T> identifier;
private final ReentrantLock lock = new ReentrantLock();
private final ReentrantLock operationLock;
private OperationState state;
private final HashSet<Long> activeThreads = new HashSet<Long>();
// Not controlled by operationLock
private Object userData;
/* package */ OperationHandleImpl(
SingleOperationManager<T> parent,
OperationIdentifier<T> identifier,
ReentrantLock operationLock,
ServiceLocator locator) {
this.parent = parent;
this.identifier = identifier;
this.operationLock = operationLock;
this.state = OperationState.SUSPENDED;
}
/* (non-Javadoc)
* @see org.glassfish.hk2.extras.operation.OperationHandle#getIdentifier()
*/
@Override
public OperationIdentifier<T> getIdentifier() {
return identifier;
}
/* (non-Javadoc)
* @see org.glassfish.hk2.extras.operation.OperationHandle#getState()
*/
@Override
public OperationState getState() {
operationLock.lock();
try {
return state;
} finally {
operationLock.unlock();
}
}
/**
* operationLock must be held
*/
/* package */ void shutdownByFiat() {
state = OperationState.CLOSED;
}
private void checkState() {
operationLock.lock();
try {
if (OperationState.CLOSED.equals(state)) {
throw new IllegalStateException(this + " is closed");
}
} finally {
operationLock.unlock();
}
}
/* (non-Javadoc)
* @see org.glassfish.hk2.extras.operation.OperationHandle#getActiveThreads()
*/
@Override
public Set<Long> getActiveThreads() {
operationLock.lock();
try {
return Collections.unmodifiableSet(activeThreads);
} finally {
operationLock.unlock();
}
}
/* (non-Javadoc)
* @see org.glassfish.hk2.extras.operation.OperationHandle#suspend(long)
*/
@Override
public void suspend(long threadId) {
operationLock.lock();
try {
if (OperationState.CLOSED.equals(state)) return;
parent.disassociateThread(threadId, this);
if (activeThreads.remove(threadId)) {
if (activeThreads.isEmpty()) {
state = OperationState.SUSPENDED;
}
}
} finally {
operationLock.unlock();
}
}
/* (non-Javadoc)
* @see org.glassfish.hk2.extras.operation.OperationHandle#suspend()
*/
@Override
public void suspend() {
suspend(Thread.currentThread().getId());
}
/* (non-Javadoc)
* @see org.glassfish.hk2.extras.operation.OperationHandle#resume(long)
*/
@Override
public void resume(long threadId) throws IllegalStateException {
operationLock.lock();
try {
checkState();
if (activeThreads.contains(threadId)) return;
// Check parent
OperationHandleImpl<T> existing = parent.getCurrentOperationOnThisThread(threadId);
if (existing != null) {
throw new IllegalStateException("The operation " + existing + " is active on " + threadId);
}
if (activeThreads.isEmpty()) {
state = OperationState.ACTIVE;
}
activeThreads.add(threadId);
parent.associateWithThread(threadId, this);
} finally {
operationLock.unlock();
}
}
/* (non-Javadoc)
* @see org.glassfish.hk2.extras.operation.OperationHandle#resume()
*/
@Override
public void resume() throws IllegalStateException {
resume(Thread.currentThread().getId());
}
/* (non-Javadoc)
* @see org.glassfish.hk2.extras.operation.OperationHandle#closeOperation()
*/
@Override
public void close() {
// outside the lock
parent.disposeAllOperationServices(this);
operationLock.lock();
try {
for (long threadId : activeThreads) {
parent.disassociateThread(threadId, this);
}
activeThreads.clear();
state = OperationState.CLOSED;
parent.closeOperation(this);
} finally {
operationLock.unlock();
}
}
@Override
public void closeOperation() {
close();
}
/* (non-Javadoc)
* @see org.glassfish.hk2.extras.operation.OperationHandle#getOperationData()
*/
@Override
public Object getOperationData() {
lock.lock();
try {
return userData;
} finally {
lock.unlock();
}
}
/* (non-Javadoc)
* @see org.glassfish.hk2.extras.operation.OperationHandle#setOperationData(java.lang.Object)
*/
@Override
public void setOperationData(Object data) {
lock.lock();
try {
userData = data;
} finally {
lock.unlock();
}
}
@Override
public int hashCode() {
return identifier.hashCode();
}
@SuppressWarnings("unchecked")
@Override
public boolean equals(Object o) {
if (o == null) return false;
if (!(o instanceof OperationHandleImpl)) return false;
return identifier.equals(((OperationHandleImpl<T>) o).identifier);
}
@Override
public String toString() {
return "OperationHandleImpl(" + identifier + "," + System.identityHashCode(this) + ")";
}
}