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Diffstat (limited to 'tags/java/sca/1.5.1/samples/implementation-crud-extension/src/main/java/crud/provider')
3 files changed, 205 insertions, 0 deletions
diff --git a/tags/java/sca/1.5.1/samples/implementation-crud-extension/src/main/java/crud/provider/CRUDImplementationInvoker.java b/tags/java/sca/1.5.1/samples/implementation-crud-extension/src/main/java/crud/provider/CRUDImplementationInvoker.java new file mode 100644 index 0000000000..b212ee3c9b --- /dev/null +++ b/tags/java/sca/1.5.1/samples/implementation-crud-extension/src/main/java/crud/provider/CRUDImplementationInvoker.java @@ -0,0 +1,79 @@ +/* + * 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 crud.provider; + +import org.apache.tuscany.sca.interfacedef.Operation; +import org.apache.tuscany.sca.invocation.Invoker; +import org.apache.tuscany.sca.invocation.Message; + +import crud.backend.ResourceManager; + + +/** + * Implements an invoker for CRUD component implementations. + * + * The invoker is responsible for handling invocations of a business operation. + * Input business data is passed to the invoke method in a Message object. + * The invoke method is responsible for handling the invocation and returning a Message with + * the output business data. + * + * In this example we are simply delegating the CRUD operation invocations to the + * corresponding methods on our fake resource manager class. + * + * More sophisticated invokers can delegate the invocation to an implementation artifact directly + * (for example a Java class using reflection as in the implementation-pojo sample) or call a runtime + * engine like a BPEL engine or an XQuery engine for example (this is what the Tuscany + * implementation-bpel and implementation-xquery extensions do). + */ +class CRUDImplementationInvoker implements Invoker { + private Operation operation; + private ResourceManager resourceManager; + + CRUDImplementationInvoker(Operation operation, ResourceManager resourceManager) { + this.operation = operation; + this.resourceManager = resourceManager; + } + + public Message invoke(Message msg) { + try { + Object[] args = msg.getBody(); + Object resp = null; + + if (operation.getName().equals("create")) { + resp = resourceManager.createResource(args[0]); + + } else if (operation.getName().equals("retrieve")) { + resp = resourceManager.retrieveResource((String)args[0]); + + } else if (operation.getName().equals("update")) { + resp = resourceManager.updateResource((String)args[0], args[1]); + + } else if (operation.getName().equals("delete")) { + resourceManager.deleteResource((String)args[0]); + } + + msg.setBody(resp); + } catch (Exception e) { + msg.setFaultBody(e.getCause()); + } + return msg; + } + +} diff --git a/tags/java/sca/1.5.1/samples/implementation-crud-extension/src/main/java/crud/provider/CRUDImplementationProvider.java b/tags/java/sca/1.5.1/samples/implementation-crud-extension/src/main/java/crud/provider/CRUDImplementationProvider.java new file mode 100644 index 0000000000..8f11f9d910 --- /dev/null +++ b/tags/java/sca/1.5.1/samples/implementation-crud-extension/src/main/java/crud/provider/CRUDImplementationProvider.java @@ -0,0 +1,75 @@ +/* + * 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 crud.provider; + +import org.apache.tuscany.sca.interfacedef.Operation; +import org.apache.tuscany.sca.invocation.Invoker; +import org.apache.tuscany.sca.provider.ImplementationProvider; +import org.apache.tuscany.sca.runtime.RuntimeComponent; +import org.apache.tuscany.sca.runtime.RuntimeComponentService; + +import crud.CRUDImplementation; +import crud.backend.ResourceManager; + + +/** + * An implementation provider for sample CRUD implementations. + * + * The implementation provider is responsible for handling the lifecycle of a component + * implementation and creating operation invokers for the service operations provided + * by the implementation. + * + * The start() and stop() methods are called when a component is started + * and stopped. + * + * The createInvoker method is called for each operation provided by the component + * implementation. The implementation provider can create an invoker and initialize it + * at that time to minimize the amount of work to be performed on each invocation. + */ +class CRUDImplementationProvider implements ImplementationProvider { + + private RuntimeComponent component; + private CRUDImplementation implementation; + + /** + * Constructs a new CRUD implementation. + */ + CRUDImplementationProvider(RuntimeComponent component, CRUDImplementation implementation) { + this.component = component; + this.implementation = implementation; + } + + public Invoker createInvoker(RuntimeComponentService service, Operation operation) { + CRUDImplementationInvoker invoker = new CRUDImplementationInvoker(operation, new ResourceManager(implementation.getDirectory())); + return invoker; + } + + public boolean supportsOneWayInvocation() { + return false; + } + + public void start() { + System.out.println("Starting " + component.getName()); + } + + public void stop() { + System.out.println("Stopping " + component.getName()); + } + +} diff --git a/tags/java/sca/1.5.1/samples/implementation-crud-extension/src/main/java/crud/provider/CRUDImplementationProviderFactory.java b/tags/java/sca/1.5.1/samples/implementation-crud-extension/src/main/java/crud/provider/CRUDImplementationProviderFactory.java new file mode 100644 index 0000000000..4566cb7155 --- /dev/null +++ b/tags/java/sca/1.5.1/samples/implementation-crud-extension/src/main/java/crud/provider/CRUDImplementationProviderFactory.java @@ -0,0 +1,51 @@ +/* + * 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 crud.provider; + +import org.apache.tuscany.sca.core.ExtensionPointRegistry; +import org.apache.tuscany.sca.provider.ImplementationProvider; +import org.apache.tuscany.sca.provider.ImplementationProviderFactory; +import org.apache.tuscany.sca.runtime.RuntimeComponent; + +import crud.CRUDImplementation; +import crud.provider.CRUDImplementationProvider; + + +/** + * A factory for CRUD implementation providers. + * + * The factory is called to create an implementation provider for each component using + * the CRUD implementation. + */ +public class CRUDImplementationProviderFactory implements ImplementationProviderFactory<CRUDImplementation> { + + /** + * Constructs a new CRUD implementation. + */ + public CRUDImplementationProviderFactory(ExtensionPointRegistry extensionPoints) { + } + + public ImplementationProvider createImplementationProvider(RuntimeComponent component, CRUDImplementation implementation) { + return new CRUDImplementationProvider(component, implementation); + } + + public Class<CRUDImplementation> getModelType() { + return CRUDImplementation.class; + } +} |