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author | antelder <antelder@13f79535-47bb-0310-9956-ffa450edef68> | 2009-10-30 12:18:56 +0000 |
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committer | antelder <antelder@13f79535-47bb-0310-9956-ffa450edef68> | 2009-10-30 12:18:56 +0000 |
commit | 7abf5a347d0f5dc9a54cd6c443daafae9f4976fc (patch) | |
tree | 99776d825d680d1f9ee4403336018ce9740b8be2 /tags/java/sca/2.0-M4-RC1/modules/core/src/main/java/org/apache/tuscany/sca/core/context/impl/CallbackServiceReferenceImpl.java | |
parent | b003942c4e5046a2a480d1db7d49f1936c4e0f6c (diff) |
Re-tag 2.0-M4 RC1 release
git-svn-id: http://svn.us.apache.org/repos/asf/tuscany@831279 13f79535-47bb-0310-9956-ffa450edef68
Diffstat (limited to 'tags/java/sca/2.0-M4-RC1/modules/core/src/main/java/org/apache/tuscany/sca/core/context/impl/CallbackServiceReferenceImpl.java')
-rw-r--r-- | tags/java/sca/2.0-M4-RC1/modules/core/src/main/java/org/apache/tuscany/sca/core/context/impl/CallbackServiceReferenceImpl.java | 154 |
1 files changed, 154 insertions, 0 deletions
diff --git a/tags/java/sca/2.0-M4-RC1/modules/core/src/main/java/org/apache/tuscany/sca/core/context/impl/CallbackServiceReferenceImpl.java b/tags/java/sca/2.0-M4-RC1/modules/core/src/main/java/org/apache/tuscany/sca/core/context/impl/CallbackServiceReferenceImpl.java new file mode 100644 index 0000000000..5218a7fd01 --- /dev/null +++ b/tags/java/sca/2.0-M4-RC1/modules/core/src/main/java/org/apache/tuscany/sca/core/context/impl/CallbackServiceReferenceImpl.java @@ -0,0 +1,154 @@ +/* + * 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.core.context.impl; + + +import java.util.List; + +import org.apache.tuscany.sca.assembly.Binding; +import org.apache.tuscany.sca.assembly.Endpoint; +import org.apache.tuscany.sca.assembly.EndpointReference; +import org.apache.tuscany.sca.context.ThreadMessageContext; +import org.apache.tuscany.sca.core.assembly.impl.RuntimeWireImpl; +import org.apache.tuscany.sca.core.invocation.ProxyFactory; +import org.apache.tuscany.sca.invocation.Message; +import org.apache.tuscany.sca.runtime.RuntimeComponentReference; +import org.apache.tuscany.sca.runtime.RuntimeWire; + +public class CallbackServiceReferenceImpl<B> extends ServiceReferenceImpl<B> { + private RuntimeWire wire; + private List<RuntimeWire> wires; + private Endpoint resolvedEndpoint; + + /* + * Public constructor for Externalizable serialization/deserialization + */ + public CallbackServiceReferenceImpl() { + super(); + } + + public CallbackServiceReferenceImpl(Class<B> interfaze, List<RuntimeWire> wires, ProxyFactory proxyFactory) { + super(interfaze, null, proxyFactory); + this.wires = wires; + init(); + } + + public void init() { + Message msgContext = ThreadMessageContext.getMessageContext(); + wire = selectCallbackWire(msgContext); + if (wire == null) { + //FIXME: need better exception + throw new RuntimeException("No callback binding found for " + msgContext.getTo().toString()); + } + resolvedEndpoint = msgContext.getFrom().getCallbackEndpoint(); + } + + @Override + protected Object createProxy() throws Exception { + return proxyFactory.createCallbackProxy(this); + } + + public RuntimeWire getCallbackWire() { + if (resolvedEndpoint == null) { + return null; + } else { + return cloneAndBind(wire); + } + } + + public Endpoint getResolvedEndpoint() { + return resolvedEndpoint; + } + + private RuntimeWire selectCallbackWire(Message msgContext) { + // look for callback binding with same name as service binding + Endpoint to = msgContext.getTo(); + if (to == null) { + //FIXME: need better exception + throw new RuntimeException("Destination for forward call is not available"); + } + for (RuntimeWire wire : wires) { + if (wire.getEndpointReference().getBinding().getName().equals(to.getBinding().getName())) { + return wire; + } + } + + // if no match, look for callback binding with same type as service binding + for (RuntimeWire wire : wires) { + if (wire.getEndpointReference().getBinding().getClass() == to.getBinding().getClass()) { + return wire; + } + } + + // no suitable callback wire was found + return null; + } + + private RuntimeWire cloneAndBind(RuntimeWire wire) { + RuntimeWire boundWire = null; + if (resolvedEndpoint != null) { + boundWire = ((RuntimeWireImpl)wire).lookupCache(resolvedEndpoint); + if (boundWire != null) { + return boundWire; + } + try { + // TODO - EPR - is this correct? + + // Fluff up a new response wire based on the callback endpoint + RuntimeComponentReference ref = + bind((RuntimeComponentReference)wire.getEndpointReference().getReference(), + resolvedEndpoint); + + boundWire = ref.getRuntimeWires().get(0); + + Binding binding = wire.getEndpointReference().getBinding(); + + ((RuntimeWireImpl)wire).addToCache(resolvedEndpoint, boundWire); + } catch (CloneNotSupportedException e) { + // will not happen + } + } + return boundWire; + } + + private RuntimeComponentReference bind(RuntimeComponentReference reference, + Endpoint callbackEndpoint) throws CloneNotSupportedException { + + // clone the callback reference ready to configure it for this callback endpoint + RuntimeComponentReference ref = (RuntimeComponentReference)reference.clone(); + ref.getTargets().clear(); + ref.getBindings().clear(); + ref.getEndpointReferences().clear(); + + // no access to the assembly factory so clone an existing epr + EndpointReference callbackEndpointReference = (EndpointReference)reference.getEndpointReferences().get(0).clone(); + + callbackEndpointReference.setReference(ref); + callbackEndpointReference.setTargetEndpoint(callbackEndpoint); + callbackEndpointReference.setUnresolved(true); + + // TODO - should really use incoming callback info but awaiting + // decision from OASIS on what will happen with callbacks + // The callback endpoint will be resolved with the registry + // when the wire chains are created + ref.getEndpointReferences().add(callbackEndpointReference); + + return ref; + } +} |