| /* |
| * 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.openejb.core.entity; |
| |
| import org.apache.openejb.BeanContext; |
| import org.apache.openejb.ApplicationException; |
| |
| import javax.transaction.TransactionSynchronizationRegistry; |
| import java.util.Set; |
| import java.util.HashSet; |
| import java.rmi.RemoteException; |
| |
| public class EntrancyTracker { |
| /** |
| * Thread local used to track the insances in the current call stack so we can determine if an nonreentrant |
| * instance is being reentered. |
| */ |
| private final ThreadLocal<Set<InstanceKey>> inCallThreadLocal = new ThreadLocal<Set<InstanceKey>>() { |
| protected Set<InstanceKey> initialValue() { |
| return new HashSet<InstanceKey>(); |
| } |
| }; |
| |
| private final TransactionSynchronizationRegistry synchronizationRegistry; |
| |
| public EntrancyTracker(TransactionSynchronizationRegistry synchronizationRegistry) { |
| this.synchronizationRegistry = synchronizationRegistry; |
| } |
| |
| public void enter(BeanContext beanContext, Object primaryKey) throws ApplicationException { |
| if (primaryKey == null || beanContext.isReentrant()) { |
| return; |
| } |
| |
| Object deploymentId = beanContext.getDeploymentID(); |
| InstanceKey key = new InstanceKey(deploymentId, primaryKey); |
| |
| |
| Set<InstanceKey> inCall; |
| try { |
| //noinspection unchecked |
| inCall = (Set<InstanceKey>) synchronizationRegistry.getResource(EntrancyTracker.class); |
| if (inCall == null) { |
| inCall = new HashSet<InstanceKey>(); |
| synchronizationRegistry.putResource(EntrancyTracker.class, inCall); |
| } |
| } catch (IllegalStateException e) { |
| inCall = inCallThreadLocal.get(); |
| } |
| |
| if (!inCall.add(key)) { |
| ApplicationException exception = new ApplicationException(new RemoteException("Attempted reentrant access. " + "Bean " + deploymentId + " is not reentrant and instance " + primaryKey + " has already been entered : " +inCall)); |
| exception.printStackTrace(); |
| throw exception; |
| } |
| |
| } |
| |
| public void exit(BeanContext beanContext, Object primaryKey) throws ApplicationException { |
| if (primaryKey == null || beanContext.isReentrant()) { |
| return; |
| } |
| |
| Object deploymentId = beanContext.getDeploymentID(); |
| InstanceKey key = new InstanceKey(deploymentId, primaryKey); |
| |
| Set<InstanceKey> inCall = null; |
| try { |
| //noinspection unchecked |
| inCall = (Set<InstanceKey>) synchronizationRegistry.getResource(EntrancyTracker.class); |
| } catch (IllegalStateException e) { |
| inCall = inCallThreadLocal.get(); |
| } |
| |
| if (inCall != null) { |
| inCall.remove(key); |
| } |
| } |
| |
| private static class InstanceKey { |
| private final Object deploymentId; |
| private final Object primaryKey; |
| |
| |
| public InstanceKey(Object deploymentId, Object primaryKey) { |
| this.deploymentId = deploymentId; |
| this.primaryKey = primaryKey; |
| } |
| |
| public boolean equals(Object o) { |
| if (this == o) return true; |
| if (o == null || getClass() != o.getClass()) return false; |
| |
| InstanceKey that = (InstanceKey) o; |
| |
| return deploymentId.equals(that.deploymentId) && primaryKey.equals(that.primaryKey); |
| } |
| |
| public int hashCode() { |
| int result; |
| result = deploymentId.hashCode(); |
| result = 31 * result + primaryKey.hashCode(); |
| return result; |
| } |
| |
| |
| public String toString() { |
| return deploymentId + ":" + primaryKey; |
| } |
| } |
| } |