diff options
Diffstat (limited to 'sca-java-1.x/tags/java-M1-final/java/sca/core/src/main/java/org/apache/tuscany/core/async/invocation/AsyncInterceptor.java')
-rw-r--r-- | sca-java-1.x/tags/java-M1-final/java/sca/core/src/main/java/org/apache/tuscany/core/async/invocation/AsyncInterceptor.java | 108 |
1 files changed, 108 insertions, 0 deletions
diff --git a/sca-java-1.x/tags/java-M1-final/java/sca/core/src/main/java/org/apache/tuscany/core/async/invocation/AsyncInterceptor.java b/sca-java-1.x/tags/java-M1-final/java/sca/core/src/main/java/org/apache/tuscany/core/async/invocation/AsyncInterceptor.java new file mode 100644 index 0000000000..08a718bd73 --- /dev/null +++ b/sca-java-1.x/tags/java-M1-final/java/sca/core/src/main/java/org/apache/tuscany/core/async/invocation/AsyncInterceptor.java @@ -0,0 +1,108 @@ +/** + * + * Copyright 2005 The Apache Software Foundation or its licensors, as applicable. + * + * Licensed 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.async.invocation; + +import javax.resource.spi.work.Work; +import javax.resource.spi.work.WorkException; +import javax.resource.spi.work.WorkManager; + +import org.apache.tuscany.core.message.Message; +import org.apache.tuscany.core.message.MessageFactory; +import org.apache.tuscany.core.wire.Interceptor; +import org.osoa.sca.CurrentModuleContext; +import org.osoa.sca.ModuleContext; +import org.osoa.sca.SCA; +import org.osoa.sca.ServiceRuntimeException; + +/** + * A wire interceptor that uses a WorkManager to schedule asynchronous execution of invocations in Work instances. + */ +public class AsyncInterceptor implements Interceptor { + + private static final ContextBinder BINDER = new ContextBinder(); + + private WorkManager workManager; + private MessageFactory messageFactory; + private Interceptor next; + + /** + * Constructs a new instance + * @param workManager + */ + public AsyncInterceptor(WorkManager workManager, MessageFactory messageFactory) { + this.workManager=workManager; + this.messageFactory=messageFactory; + } + + public Message invoke(final Message message) { + + final ModuleContext currentModuleContext=CurrentModuleContext.getContext(); + + // Schedule the invocation of the next interceptor in a new Work instance + try { + workManager.scheduleWork(new Work() { + + public void run() { + ModuleContext oldModuleContext=CurrentModuleContext.getContext(); + try { + BINDER.setContext(currentModuleContext); + + // Invoke the next interceptor + next.invoke(message); + + } catch (Exception e) { + //FIXME How do we report exceptions? + e.printStackTrace(); + + } finally { + + BINDER.setContext(oldModuleContext); + } + } + + public void release() { + } + + }); + } catch (WorkException e) { + //FIXME Which exception should we throw here? + throw new ServiceRuntimeException(e); + } + + // No return on a OneWay invocation. + return messageFactory.createMessage(); + } + + public void setNext(Interceptor next) { + this.next=next; + } + + private static class ContextBinder extends SCA { + public void setContext(ModuleContext context) { + setModuleContext(context); + } + + public void start() { + throw new AssertionError(); + } + + public void stop() { + throw new AssertionError(); + } + } + +} |