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Diffstat (limited to '')
3 files changed, 412 insertions, 0 deletions
diff --git a/sca-java-2.x/branches/2.0-Beta1/modules/core-databinding/src/main/java/org/apache/tuscany/sca/core/databinding/wire/DataBindingRuntimeWireProcessor.java b/sca-java-2.x/branches/2.0-Beta1/modules/core-databinding/src/main/java/org/apache/tuscany/sca/core/databinding/wire/DataBindingRuntimeWireProcessor.java new file mode 100644 index 0000000000..0e615519f1 --- /dev/null +++ b/sca-java-2.x/branches/2.0-Beta1/modules/core-databinding/src/main/java/org/apache/tuscany/sca/core/databinding/wire/DataBindingRuntimeWireProcessor.java @@ -0,0 +1,184 @@ +/* + * 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.databinding.wire; + +import java.util.List; + +import org.apache.tuscany.sca.core.ExtensionPointRegistry; +import org.apache.tuscany.sca.core.UtilityExtensionPoint; +import org.apache.tuscany.sca.databinding.Mediator; +import org.apache.tuscany.sca.interfacedef.DataType; +import org.apache.tuscany.sca.interfacedef.InterfaceContract; +import org.apache.tuscany.sca.interfacedef.Operation; +import org.apache.tuscany.sca.invocation.Interceptor; +import org.apache.tuscany.sca.invocation.InvocationChain; +import org.apache.tuscany.sca.invocation.Phase; +import org.apache.tuscany.sca.runtime.RuntimeEndpoint; +import org.apache.tuscany.sca.runtime.RuntimeEndpointReference; +import org.apache.tuscany.sca.runtime.RuntimeWireProcessor; + +/** + * This processor is responsible to add an interceptor to invocation chain if + * the source and target operations have different databinding requirements + * + * @version $Rev$ $Date$ + */ +public class DataBindingRuntimeWireProcessor implements RuntimeWireProcessor { + private Mediator mediator; + + public DataBindingRuntimeWireProcessor(ExtensionPointRegistry registry) { + super(); + this.mediator = registry.getExtensionPoint(UtilityExtensionPoint.class).getUtility(Mediator.class); + } + + public boolean isTransformationRequired(DataType source, DataType target) { + if (source == null || target == null) { // void return type + return false; + } + if (source == target) { + return false; + } + + // Output type can be null + if (source == null && target == null) { + return false; + } else if (source == null || target == null) { + return true; + } + String sourceDataBinding = source.getDataBinding(); + String targetDataBinding = target.getDataBinding(); + if (sourceDataBinding == targetDataBinding) { + return false; + } + if (sourceDataBinding == null || targetDataBinding == null) { + // TODO: If any of the databinding is null, then no transformation + return false; + } + return !sourceDataBinding.equals(targetDataBinding); + } + + public boolean isTransformationRequired(Operation source, Operation target) { + if (source == target) { + return false; + } + + if (source.isWrapperStyle() != target.isWrapperStyle()) { + return true; + } + + // Check output type + DataType sourceOutputType = source.getOutputType(); + DataType targetOutputType = target.getOutputType(); + + // Note the target output type is now the source for checking + // compatibility + if (isTransformationRequired(targetOutputType, sourceOutputType)) { + return true; + } + + List<DataType> sourceInputType = source.getInputType().getLogical(); + List<DataType> targetInputType = target.getInputType().getLogical(); + + int size = sourceInputType.size(); + if (size != targetInputType.size()) { + // TUSCANY-1682: The wrapper style may have different arguments + return true; + } + for (int i = 0; i < size; i++) { + if (isTransformationRequired(sourceInputType.get(i), targetInputType.get(i))) { + return true; + } + } + + return false; + } + + private boolean isTransformationRequired(InterfaceContract sourceContract, + Operation sourceOperation, + InterfaceContract targetContract, + Operation targetOperation) { + if (targetContract == null) { + targetContract = sourceContract; + } + if (sourceContract == targetContract) { + return false; + } + return isTransformationRequired(sourceOperation, targetOperation); + } + + public void process(RuntimeEndpoint endpoint) { + InterfaceContract sourceContract = endpoint.getBindingInterfaceContract(); + InterfaceContract targetContract = endpoint.getComponentTypeServiceInterfaceContract(); + if (targetContract == null) { + targetContract = sourceContract; + } + + if (!sourceContract.getInterface().isRemotable()) { + return; + } + List<InvocationChain> chains = endpoint.getInvocationChains(); + for (InvocationChain chain : chains) { + Operation sourceOperation = chain.getSourceOperation(); + Operation targetOperation = chain.getTargetOperation(); + + Interceptor interceptor = null; + if (isTransformationRequired(sourceContract, sourceOperation, targetContract, targetOperation)) { + // Add the interceptor to the source side because multiple + // references can be wired to the same service + interceptor = new DataTransformationInterceptor(endpoint, sourceOperation, targetOperation, mediator); + } + if (interceptor != null) { + String phase = Phase.SERVICE_INTERFACE; + chain.addInterceptor(phase, interceptor); + } + } + + } + + public void process(RuntimeEndpointReference endpointReference) { + InterfaceContract sourceContract = endpointReference.getComponentTypeReferenceInterfaceContract(); + InterfaceContract targetContract = endpointReference.getBindingInterfaceContract(); + if (targetContract == null) { + targetContract = sourceContract; + } + + if (sourceContract == null || !sourceContract.getInterface().isRemotable()) { + return; + } + List<InvocationChain> chains = endpointReference.getInvocationChains(); + for (InvocationChain chain : chains) { + Operation sourceOperation = chain.getSourceOperation(); + Operation targetOperation = chain.getTargetOperation(); + + Interceptor interceptor = null; + if (isTransformationRequired(sourceContract, sourceOperation, targetContract, targetOperation)) { + // Add the interceptor to the source side because multiple + // references can be wired to the same service + interceptor = new DataTransformationInterceptor(endpointReference, sourceOperation, targetOperation, mediator); + } + if (interceptor != null) { + String phase = Phase.REFERENCE_INTERFACE; + chain.addInterceptor(phase, interceptor); + } + } + + } + +} diff --git a/sca-java-2.x/branches/2.0-Beta1/modules/core-databinding/src/main/java/org/apache/tuscany/sca/core/databinding/wire/DataTransformationInterceptor.java b/sca-java-2.x/branches/2.0-Beta1/modules/core-databinding/src/main/java/org/apache/tuscany/sca/core/databinding/wire/DataTransformationInterceptor.java new file mode 100644 index 0000000000..7bf9833d04 --- /dev/null +++ b/sca-java-2.x/branches/2.0-Beta1/modules/core-databinding/src/main/java/org/apache/tuscany/sca/core/databinding/wire/DataTransformationInterceptor.java @@ -0,0 +1,148 @@ +/* + * 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.databinding.wire; + +import java.lang.reflect.Method; +import java.lang.reflect.Type; +import java.util.HashMap; +import java.util.List; +import java.util.Map; + +import org.apache.tuscany.sca.databinding.Mediator; +import org.apache.tuscany.sca.interfacedef.DataType; +import org.apache.tuscany.sca.interfacedef.Operation; +import org.apache.tuscany.sca.interfacedef.java.JavaOperation; +import org.apache.tuscany.sca.invocation.Interceptor; +import org.apache.tuscany.sca.invocation.Invoker; +import org.apache.tuscany.sca.invocation.Message; +import org.apache.tuscany.sca.runtime.Invocable; + +/** + * An interceptor to transform data across databindings on the wire + * + * @version $Rev$ $Date$ + */ +public class DataTransformationInterceptor implements Interceptor { + private Invoker next; + + private Operation sourceOperation; + + private Operation targetOperation; + private Invocable invocable; + private Mediator mediator; + + public DataTransformationInterceptor(Invocable invocable, + Operation sourceOperation, + Operation targetOperation, + Mediator mediator) { + super(); + this.sourceOperation = sourceOperation; + this.targetOperation = targetOperation; + if ( sourceOperation instanceof JavaOperation ) { + JavaOperation javaOp = (JavaOperation) sourceOperation; + Method sourceMethod = javaOp.getJavaMethod(); + } + // Holder pattern. In order to perform data mediation on Holder return types, it is + // necessary to set up a data transformation on the Holder<T> class T. on return. + DataType<DataType> returnTargetType = getFirstHolderType( sourceOperation.getInputType() ); + if ( returnTargetType != null ) { + this.sourceOperation.setOutputType(returnTargetType); + } + returnTargetType = getFirstHolderType( targetOperation.getInputType() ); + if ( returnTargetType != null ) { + this.targetOperation.setOutputType(returnTargetType); + } + + this.mediator = mediator; + this.invocable = invocable; + } + + public Invoker getNext() { + return next; + } + + public Message invoke(Message msg) { + Map<String, Object> metadata = new HashMap<String, Object>(); + metadata.put(Invocable.class.getName(), invocable); + Object input = mediator.mediateInput(msg.getBody(), sourceOperation, targetOperation, metadata); + msg.setBody(input); + Message resultMsg = next.invoke(msg); + + if (sourceOperation.isNonBlocking()) { + // Not to reset the message body + return resultMsg; + } + + Object result = resultMsg.getBody(); + + if (resultMsg.isFault()) { + Object transformedFault = null; + if ((result instanceof Exception) && !(result instanceof RuntimeException)) { + transformedFault = mediator.mediateFault(result, sourceOperation, targetOperation, metadata); + if (transformedFault != result) { + resultMsg.setFaultBody(transformedFault); + } + } + // + // Leave it to another layer to actually throw the Exception which constitutes + // the message body. We don't throw it here. + // + } else { + assert !(result instanceof Throwable) : "Expected messages that are not throwable " + result; + Object newResult = mediator.mediateOutput(result, sourceOperation, targetOperation, metadata); + resultMsg.setBody(newResult); + } + + return resultMsg; + } + + public void setNext(Invoker next) { + this.next = next; + } + + /** + * Returns return type for first Holder in input list. + * Returns null if the inputs do not contain a Holder. + */ + protected static DataType<DataType> getFirstHolderType( DataType<List<DataType>> inputTypes ) { + if (inputTypes != null) { + List<DataType> logicalType = inputTypes.getLogical(); + if (logicalType != null) { + for (int i = 0; i < logicalType.size(); i++) { + DataType dataType = logicalType.get(i); + if (isHolder(dataType.getGenericType())) { + // Fix up output from void to returned data type. + // System.out.println("DataTransformationInterceptor.<> source input[" + i + "] is Holder, logicalType=" + dataType); + return dataType; + } + } + } + } + return null; + } + + protected static boolean isHolder( Type type ) { + String typeString = type.toString(); + if ( typeString.startsWith( "javax.xml.ws.Holder" ) ) { + return true; + } + return false; + } +} diff --git a/sca-java-2.x/branches/2.0-Beta1/modules/core-databinding/src/main/java/org/apache/tuscany/sca/core/databinding/wire/PassByValueInterceptor.java b/sca-java-2.x/branches/2.0-Beta1/modules/core-databinding/src/main/java/org/apache/tuscany/sca/core/databinding/wire/PassByValueInterceptor.java new file mode 100644 index 0000000000..44e5072e61 --- /dev/null +++ b/sca-java-2.x/branches/2.0-Beta1/modules/core-databinding/src/main/java/org/apache/tuscany/sca/core/databinding/wire/PassByValueInterceptor.java @@ -0,0 +1,80 @@ +/* + * 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.databinding.wire; + +import org.apache.tuscany.sca.databinding.Mediator; +import org.apache.tuscany.sca.interfacedef.Operation; +import org.apache.tuscany.sca.invocation.Interceptor; +import org.apache.tuscany.sca.invocation.InvocationChain; +import org.apache.tuscany.sca.invocation.Invoker; +import org.apache.tuscany.sca.invocation.Message; + +/** + * Implementation of an interceptor that enforces pass-by-value semantics + * on operation invocations by copying the operation input and output data. + * + * @version $Rev$ $Date$ + */ +public class PassByValueInterceptor implements Interceptor { + + private Mediator mediator; + private Operation operation; + private Invoker nextInvoker; + private InvocationChain chain; + + /** + * Constructs a new PassByValueInterceptor. + * @param dataBindings databinding extension point + * @param operation the intercepted operation + */ + public PassByValueInterceptor(Mediator mediator, InvocationChain chain, Operation operation) { + this.mediator = mediator; + this.chain = chain; + this.operation = operation; + } + + public Message invoke(Message msg) { + if (chain.allowsPassByReference()) { + return nextInvoker.invoke(msg); + } + + msg.setBody(mediator.copyInput(msg.getBody(), operation)); + + Message resultMsg = nextInvoker.invoke(msg); + + if (!resultMsg.isFault() && operation.getOutputType() != null) { + resultMsg.setBody(mediator.copyOutput(resultMsg.getBody(), operation)); + } + + if (resultMsg.isFault()) { + resultMsg.setFaultBody(mediator.copyFault(resultMsg.getBody(), operation)); + } + return resultMsg; + } + + public Invoker getNext() { + return nextInvoker; + } + + public void setNext(Invoker next) { + this.nextInvoker = next; + } + +} |