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Diffstat (limited to 'sca-java-2.x/branches/2.0-Beta2/modules/core/src/main/java/org/apache/tuscany/sca/core/context/impl/CallbackServiceReferenceImpl.java')
-rw-r--r-- | sca-java-2.x/branches/2.0-Beta2/modules/core/src/main/java/org/apache/tuscany/sca/core/context/impl/CallbackServiceReferenceImpl.java | 124 |
1 files changed, 124 insertions, 0 deletions
diff --git a/sca-java-2.x/branches/2.0-Beta2/modules/core/src/main/java/org/apache/tuscany/sca/core/context/impl/CallbackServiceReferenceImpl.java b/sca-java-2.x/branches/2.0-Beta2/modules/core/src/main/java/org/apache/tuscany/sca/core/context/impl/CallbackServiceReferenceImpl.java new file mode 100644 index 0000000000..542a80f926 --- /dev/null +++ b/sca-java-2.x/branches/2.0-Beta2/modules/core/src/main/java/org/apache/tuscany/sca/core/context/impl/CallbackServiceReferenceImpl.java @@ -0,0 +1,124 @@ +/* + * 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.Endpoint; +import org.apache.tuscany.sca.assembly.EndpointReference; +import org.apache.tuscany.sca.context.CompositeContext; +import org.apache.tuscany.sca.context.ThreadMessageContext; +import org.apache.tuscany.sca.invocation.Message; +import org.apache.tuscany.sca.runtime.RuntimeEndpointReference; +import org.oasisopen.sca.ServiceRuntimeException; + +public class CallbackServiceReferenceImpl<B> extends ServiceReferenceImpl<B> { + private RuntimeEndpointReference callbackEPR; + private List<? extends EndpointReference> callbackEPRs; + private Endpoint resolvedEndpoint; + + /* + * Public constructor for Externalizable serialization/deserialization + */ + public CallbackServiceReferenceImpl() { + super(); + } + + public CallbackServiceReferenceImpl(Class<B> interfaze, + List<? extends EndpointReference> callbackEPRs) { + super(interfaze, null, getCompositeContext(callbackEPRs)); + this.callbackEPRs = callbackEPRs; + init(); + } + + private static CompositeContext getCompositeContext(List<? extends EndpointReference> callbackEPRs) { + if(!callbackEPRs.isEmpty()) { + RuntimeEndpointReference epr = (RuntimeEndpointReference) callbackEPRs.get(0); + return epr.getCompositeContext(); + } + return null; + } + + public void init() { + Message msgContext = ThreadMessageContext.getMessageContext(); + callbackEPR = selectCallbackEPR(msgContext); + if (callbackEPR == null) { + throw new ServiceRuntimeException("No callback binding found for " + msgContext.getTo().toString()); + } + resolvedEndpoint = msgContext.getFrom().getCallbackEndpoint(); + } + + @Override + protected B createProxy() throws Exception { + return proxyFactory.createCallbackProxy(this); + } + + public RuntimeEndpointReference getCallbackEPR() { + if (resolvedEndpoint == null) { + return null; + } else { + return cloneAndBind(callbackEPR); + } + } + + public Endpoint getResolvedEndpoint() { + return resolvedEndpoint; + } + + private RuntimeEndpointReference selectCallbackEPR(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 ServiceRuntimeException("Destination for forward call is not available"); + } + for (EndpointReference epr : callbackEPRs) { + if (epr.getBinding().getName().equals(to.getBinding().getName())) { + return (RuntimeEndpointReference) epr; + } + } + + // if no match, look for callback binding with same type as service binding + for (EndpointReference epr : callbackEPRs) { + if (epr.getBinding().getType().equals(to.getBinding().getType())) { + return (RuntimeEndpointReference) epr; + } + } + + // no suitable callback wire was found + return null; + } + + private RuntimeEndpointReference cloneAndBind(RuntimeEndpointReference endpointReference) { + if (resolvedEndpoint != null) { + + try { + RuntimeEndpointReference epr = (RuntimeEndpointReference)endpointReference.clone(); + epr.setTargetEndpoint(resolvedEndpoint); + return epr; + } catch (CloneNotSupportedException e) { + // will not happen + throw new ServiceRuntimeException(e); + } + } else { + return null; + } + } + +} |