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Diffstat (limited to 'sca-java-1.x/tags/1.6.1-TUSCANY-3909/implementation-java-runtime/src/main/java/org/apache/tuscany/sca/implementation/java/invocation/JavaImplementationInvoker.java')
| -rw-r--r-- | sca-java-1.x/tags/1.6.1-TUSCANY-3909/implementation-java-runtime/src/main/java/org/apache/tuscany/sca/implementation/java/invocation/JavaImplementationInvoker.java | 248 |
1 files changed, 248 insertions, 0 deletions
diff --git a/sca-java-1.x/tags/1.6.1-TUSCANY-3909/implementation-java-runtime/src/main/java/org/apache/tuscany/sca/implementation/java/invocation/JavaImplementationInvoker.java b/sca-java-1.x/tags/1.6.1-TUSCANY-3909/implementation-java-runtime/src/main/java/org/apache/tuscany/sca/implementation/java/invocation/JavaImplementationInvoker.java new file mode 100644 index 0000000000..e7f419286d --- /dev/null +++ b/sca-java-1.x/tags/1.6.1-TUSCANY-3909/implementation-java-runtime/src/main/java/org/apache/tuscany/sca/implementation/java/invocation/JavaImplementationInvoker.java @@ -0,0 +1,248 @@ +/* + * 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.java.invocation; + +import java.lang.reflect.InvocationTargetException; +import java.lang.reflect.Method; +import java.util.ArrayList; +import java.util.List; + +import javax.xml.ws.Holder; + +import org.apache.tuscany.sca.core.context.InstanceWrapper; +import org.apache.tuscany.sca.core.scope.Scope; +import org.apache.tuscany.sca.core.scope.ScopeContainer; +import org.apache.tuscany.sca.core.scope.ScopedRuntimeComponent; +import org.apache.tuscany.sca.implementation.java.JavaImplementation; +import org.apache.tuscany.sca.interfacedef.ConversationSequence; +import org.apache.tuscany.sca.interfacedef.DataType; +import org.apache.tuscany.sca.interfacedef.Operation; +import org.apache.tuscany.sca.interfacedef.ParameterMode; +import org.apache.tuscany.sca.interfacedef.java.impl.JavaInterfaceUtil; +import org.apache.tuscany.sca.invocation.DataExchangeSemantics; +import org.apache.tuscany.sca.invocation.Invoker; +import org.apache.tuscany.sca.invocation.Message; +import org.apache.tuscany.sca.runtime.EndpointReference; +import org.apache.tuscany.sca.runtime.ReferenceParameters; +import org.apache.tuscany.sca.runtime.RuntimeComponent; +import org.osoa.sca.ServiceRuntimeException; + +/** + * Responsible for synchronously dispatching an invocation to a Java component + * implementation instance + * + * @version $Rev$ $Date$ + */ +public class JavaImplementationInvoker implements Invoker, DataExchangeSemantics { + protected Operation operation; + protected Method method; + protected boolean allowsPBR; + + @SuppressWarnings("unchecked") + protected final ScopeContainer scopeContainer; + + public JavaImplementationInvoker(Operation operation, Method method, RuntimeComponent component) { + assert method != null : "Operation method cannot be null"; + this.method = method; + this.operation = operation; + this.scopeContainer = ((ScopedRuntimeComponent)component).getScopeContainer(); + this.allowsPBR = ((JavaImplementation)component.getImplementation()).isAllowsPassByReference(method); + } + + public JavaImplementationInvoker(Operation operation, RuntimeComponent component) { + // used if the method can't be computed statically in advance + this.operation = operation; + this.scopeContainer = ((ScopedRuntimeComponent)component).getScopeContainer(); + } + + @SuppressWarnings("unchecked") + public Message invoke(Message msg) { + Operation op = msg.getOperation(); + if (op == null) { + op = this.operation; + } + ConversationSequence sequence = op.getConversationSequence(); + Object payload = msg.getBody(); + + Object contextId = null; + + EndpointReference from = msg.getFrom(); + ReferenceParameters parameters = null; + if (from != null) { + parameters = from.getReferenceParameters(); + } + // check what sort of context is required + if (scopeContainer != null) { + Scope scope = scopeContainer.getScope(); + if (scope == Scope.REQUEST) { + contextId = Thread.currentThread(); + } else if (scope == Scope.CONVERSATION && parameters != null) { + contextId = parameters.getConversationID(); + } + } + + try { + // The following call might create a new conversation, as a result, the msg.getConversationID() might + // return a new value + InstanceWrapper wrapper = scopeContainer.getWrapper(contextId); + + // detects whether the scope container has created a conversation Id. This will + // happen in the case that the component has conversational scope but only the + // callback interface is conversational. Or in the callback case if the service interface + // is conversational and the callback interface isn't. If we are in this situation we need + // to get the contextId of this component and remove it after we have invoked the method on + // it. It is possible that the component instance will not go away when it is removed below + // because a callback conversation will still be holding a reference to it + boolean removeTemporaryConversationalComponentAfterCall = false; + if (parameters != null && (contextId == null) && (parameters.getConversationID() != null)) { + contextId = parameters.getConversationID(); + removeTemporaryConversationalComponentAfterCall = true; + } + + Object instance = wrapper.getInstance(); + + // If the method couldn't be computed statically, or the instance being + // invoked is a user-specified callback object that doesn't implement + // the service interface from which the reflective method was obtained, + // compute the method object dynamically for this invocation. + Method imethod = method; + if (imethod == null || !imethod.getDeclaringClass().isInstance(instance)) { + try { + imethod = JavaInterfaceUtil.findMethod(instance.getClass(), op); + } catch (NoSuchMethodException e) { + throw new IllegalArgumentException("Callback object does not provide method " + e.getMessage()); + } + } + + int argumentHolderCount = 0; + + // Holder pattern. Any payload parameters <T> which are should be in holders are placed in Holder<T>. + // Only check Holder for remotable interfaces + if (imethod != null && operation.getInterface().isRemotable()) { + List<DataType> inputTypes = operation.getInputType().getLogical(); + for (int i = 0, size = inputTypes.size(); i < size; i++) { + if (ParameterMode.IN != operation.getParameterModes().get(i)) { + // Promote array params from [<T>] to [Holder<T>] + Object[] payloadArray = (Object[])payload; + for (int j = 0; payloadArray != null && j < payloadArray.length; j++) { + Object item = payloadArray[j]; + payloadArray[j] = new Holder(item); + } + argumentHolderCount++; + } + } + } + + Object ret; + if (payload != null && !payload.getClass().isArray()) { + ret = imethod.invoke(instance, payload); + } else { + ret = imethod.invoke(instance, (Object[])payload); + } + + scopeContainer.returnWrapper(wrapper, contextId); + + if ((sequence == ConversationSequence.CONVERSATION_END) || (removeTemporaryConversationalComponentAfterCall)) { + // if end conversation, or we have the special case where a conversational + // object was created to service the stateless half of a stateful component + scopeContainer.remove(contextId); + parameters.setConversationID(null); + } + + if (argumentHolderCount > 0) { + // Holder pattern. Any payload Holder<T> types are returned as the message body. + List returnArgs = new ArrayList<Object>(); + if (imethod != null) { + for (int i = 0, size = operation.getParameterModes().size(); i < size; i++) { + // System.out.println( "JavaImplementationInvoker.invoke return parameter " + i + " type=" + parameter.getClass().getName() ); + if (ParameterMode.IN != operation.getParameterModes().get(i)) { + // Demote array params from Holder<T> to <T>. + Object[] payloadArray = (Object[])payload; + for (int j = 0; j < payloadArray.length; j++) { + Holder<Object> item = (Holder<Object>)payloadArray[j]; + payloadArray[j] = item.value; + returnArgs.add(payloadArray[j]); + } + } + } + } + // Although payload items are returned in a list, currently only support 1 return type. + if (returnArgs.size() == 1) { + Object value = returnArgs.get(0); + msg.setBody(value); + } else { + msg.setBody(returnArgs.toArray()); + } + } else { + msg.setBody(ret); + } + } catch (InvocationTargetException e) { + Throwable cause = e.getTargetException(); + boolean isChecked = false; + for (DataType<?> d : operation.getFaultTypes()) { + if (d.getPhysical().isInstance(cause)) { + isChecked = true; + msg.setFaultBody(cause); + break; + } + } + + if (sequence != ConversationSequence.CONVERSATION_NONE) { + try { + // // If the exception is not a business exception then end the conversation + // boolean businessException = false; + // + // for (DataType dataType : operation.getFaultTypes()){ + // if ((dataType.getPhysical() == e.getCause().getClass()) && + // (contextId != null) ){ + // businessException = true; + // break; + // } + // } + + if (!isChecked && contextId != null) { + scopeContainer.remove(contextId); + parameters.setConversationID(null); + } + } catch (Exception ex) { + // TODO - sure what the best course of action is here. We have + // a system exception in the middle of a business exception + } + } + if (!isChecked) { + if (cause instanceof RuntimeException) { + throw (RuntimeException)cause; + } + if (cause instanceof Error) { + throw (Error)cause; + } else { + throw new ServiceRuntimeException(cause.getMessage(), cause); + } + } + + } catch (Exception e) { + msg.setFaultBody(e); + } + return msg; + } + + public boolean allowsPassByReference() { + return allowsPBR; + } +} |