diff options
Diffstat (limited to 'sandbox/rfeng/minicore/src/main/java/org/apache/tuscany/core/component/scope/HttpSessionScopeContainer.java')
-rw-r--r-- | sandbox/rfeng/minicore/src/main/java/org/apache/tuscany/core/component/scope/HttpSessionScopeContainer.java | 141 |
1 files changed, 141 insertions, 0 deletions
diff --git a/sandbox/rfeng/minicore/src/main/java/org/apache/tuscany/core/component/scope/HttpSessionScopeContainer.java b/sandbox/rfeng/minicore/src/main/java/org/apache/tuscany/core/component/scope/HttpSessionScopeContainer.java new file mode 100644 index 0000000000..5a398e921e --- /dev/null +++ b/sandbox/rfeng/minicore/src/main/java/org/apache/tuscany/core/component/scope/HttpSessionScopeContainer.java @@ -0,0 +1,141 @@ +/* + * 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.tuscany.core.component.scope; + +import java.util.ArrayList; +import java.util.List; +import java.util.ListIterator; +import java.util.Map; +import java.util.concurrent.ConcurrentHashMap; + +import org.apache.tuscany.spi.component.AtomicComponent; +import org.apache.tuscany.spi.component.ScopeContainerMonitor; +import org.apache.tuscany.spi.component.TargetDestructionException; +import org.apache.tuscany.spi.component.TargetResolutionException; +import org.apache.tuscany.spi.component.WorkContext; +import org.apache.tuscany.spi.component.InstanceWrapper; +import org.apache.tuscany.spi.event.Event; +import org.apache.tuscany.spi.model.Scope; + +import org.apache.tuscany.core.component.event.HttpSessionEnd; + +/** + * A scope context which manages atomic component instances keyed on HTTP session + * + * @version $Rev$ $Date$ + */ +public class HttpSessionScopeContainer extends AbstractScopeContainer { + private final WorkContext workContext; + private final Map<AtomicComponent, Map<Object, InstanceWrapper>> contexts; + private final Map<Object, List<InstanceWrapper>> destroyQueues; + + public HttpSessionScopeContainer(WorkContext workContext, ScopeContainerMonitor monitor) { + super(Scope.SESSION, monitor); + this.workContext = workContext; + contexts = new ConcurrentHashMap<AtomicComponent, Map<Object, InstanceWrapper>>(); + destroyQueues = new ConcurrentHashMap<Object, List<InstanceWrapper>>(); + } + + public void onEvent(Event event) { + checkInit(); + if (event instanceof HttpSessionEnd) { + Object key = ((HttpSessionEnd) event).getId(); + shutdownInstances(key); + workContext.clearIdentifier(key); + } + } + + public synchronized void start() { + if (lifecycleState != UNINITIALIZED && lifecycleState != STOPPED) { + throw new IllegalStateException("Scope must be in UNINITIALIZED or STOPPED state [" + lifecycleState + "]"); + } + lifecycleState = RUNNING; + } + + public synchronized void stop() { + contexts.clear(); + synchronized (destroyQueues) { + destroyQueues.clear(); + } + lifecycleState = STOPPED; + } + + public void register(AtomicComponent component, Object groupId) { + contexts.put(component, new ConcurrentHashMap<Object, InstanceWrapper>()); + component.addListener(this); + } + + public void unregister(AtomicComponent component) { + // FIXME should all the instances associated with this component be destroyed already + contexts.remove(component); + component.removeListener(this); + super.unregister(component); + } + + protected InstanceWrapper getInstanceWrapper(AtomicComponent component, boolean create) + throws TargetResolutionException { + Object key = workContext.getIdentifier(Scope.SESSION); + assert key != null : "HTTP session key not bound in work context"; + return getInstance(component, key, create); + } + + private InstanceWrapper getInstance(AtomicComponent component, Object key, boolean create) + throws TargetResolutionException { + Map<Object, InstanceWrapper> wrappers = contexts.get(component); + InstanceWrapper ctx = wrappers.get(key); + if (ctx == null && !create) { + return null; + } + if (ctx == null) { + ctx = component.createInstanceWrapper(); + ctx.start(); + wrappers.put(key, ctx); + List<InstanceWrapper> destroyQueue = destroyQueues.get(key); + if (destroyQueue == null) { + destroyQueue = new ArrayList<InstanceWrapper>(); + destroyQueues.put(key, destroyQueue); + } + synchronized (destroyQueue) { + destroyQueue.add(ctx); + } + } + return ctx; + + } + + private void shutdownInstances(Object key) { + List<InstanceWrapper> destroyQueue = destroyQueues.remove(key); + if (destroyQueue != null) { + for (Map<Object, InstanceWrapper> map : contexts.values()) { + map.remove(key); + } + ListIterator<InstanceWrapper> iter = destroyQueue.listIterator(destroyQueue.size()); + synchronized (destroyQueue) { + while (iter.hasPrevious()) { + try { + iter.previous().stop(); + } catch (TargetDestructionException e) { + monitor.destructionError(e); + } + } + } + } + } + +} |