diff options
Diffstat (limited to 'sca-java-1.x/branches/sca-java-1.2.1/modules/implementation-notification/src/main/java/org/apache/tuscany/sca/implementation/notification/NotificationComponentInvoker.java')
-rw-r--r-- | sca-java-1.x/branches/sca-java-1.2.1/modules/implementation-notification/src/main/java/org/apache/tuscany/sca/implementation/notification/NotificationComponentInvoker.java | 112 |
1 files changed, 112 insertions, 0 deletions
diff --git a/sca-java-1.x/branches/sca-java-1.2.1/modules/implementation-notification/src/main/java/org/apache/tuscany/sca/implementation/notification/NotificationComponentInvoker.java b/sca-java-1.x/branches/sca-java-1.2.1/modules/implementation-notification/src/main/java/org/apache/tuscany/sca/implementation/notification/NotificationComponentInvoker.java new file mode 100644 index 0000000000..e804d14d23 --- /dev/null +++ b/sca-java-1.x/branches/sca-java-1.2.1/modules/implementation-notification/src/main/java/org/apache/tuscany/sca/implementation/notification/NotificationComponentInvoker.java @@ -0,0 +1,112 @@ +/* + * 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.sca.implementation.notification; + +import java.util.ArrayList; +import java.util.List; + +import org.apache.tuscany.sca.assembly.ComponentReference; +import org.apache.tuscany.sca.interfacedef.Operation; +import org.apache.tuscany.sca.invocation.InvocationChain; +import org.apache.tuscany.sca.invocation.Invoker; +import org.apache.tuscany.sca.invocation.Message; +import org.apache.tuscany.sca.runtime.RuntimeComponent; +import org.apache.tuscany.sca.runtime.RuntimeComponentReference; +import org.apache.tuscany.sca.runtime.RuntimeWire; + +/** + * Turns invoke into remote message fan-out + * + * @version $Rev$ $Date$ + */ +public class NotificationComponentInvoker implements Invoker { + + private static final Message RESPONSE = new ImmutableMessage(); + private List<InvocationChain> subscriberInvocationChains; + private Operation operation; + private RuntimeComponent component; + + public NotificationComponentInvoker(Operation operation, RuntimeComponent component) { + this.subscriberInvocationChains = null; + this.operation = operation; + this.component = component; + } + + public Message invoke(Message msg) { + addSubscriberInvocationChains(); + + // REVIEW Should this be done in separate thread(s)? + // REVIEW Should separate copies of message be used? + Object msgBody = msg.getBody(); + + for (InvocationChain subscriberInvocationChain : subscriberInvocationChains) { + Invoker chainInvoker = subscriberInvocationChain.getHeadInvoker(); + msg.setBody(msgBody); + chainInvoker.invoke(msg); + } + + return RESPONSE; + } + + private void addSubscriberInvocationChains() { + if (subscriberInvocationChains == null) { + subscriberInvocationChains = new ArrayList<InvocationChain>(); + for (ComponentReference reference : component.getReferences()) { + if (reference.getName().indexOf("$self$") >= 0) { + continue; + } + RuntimeComponentReference rtCompRef = null; + if (reference instanceof RuntimeComponentReference) { + rtCompRef = (RuntimeComponentReference)reference; + } + else { + throw new RuntimeException("Need a runtime component reference"); + } + for(RuntimeWire wire : rtCompRef.getRuntimeWires()) { + // This is much less efficient now !! + List<InvocationChain> chains = wire.getInvocationChains(); + InvocationChain chain = getInvocationChain(chains, operation); + subscriberInvocationChains.add(chain); + } + } + } + } + + private InvocationChain getInvocationChain(List<InvocationChain> chains, Operation operation) { + InvocationChain chain = null; + for (InvocationChain ch : chains) { + if (ch.getTargetOperation().equals(operation)) { + chain = ch; + break; + } + } + if (chain == null) { + for (InvocationChain ch : chains) { + if (ch.getTargetOperation().getName().equals(operation.getName())) { + chain = ch; + break; + } + } + if (chain == null) { + throw new RuntimeException("Can't find a compatible chain"); + } + } + return chain; + } +} |