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Diffstat (limited to '')
-rw-r--r-- | sandbox/ant/sca/trunk/modules/node-api/src/main/java/org/apache/tuscany/sca/node/NodeFactory.java | 199 |
1 files changed, 199 insertions, 0 deletions
diff --git a/sandbox/ant/sca/trunk/modules/node-api/src/main/java/org/apache/tuscany/sca/node/NodeFactory.java b/sandbox/ant/sca/trunk/modules/node-api/src/main/java/org/apache/tuscany/sca/node/NodeFactory.java new file mode 100644 index 0000000000..426c32bd49 --- /dev/null +++ b/sandbox/ant/sca/trunk/modules/node-api/src/main/java/org/apache/tuscany/sca/node/NodeFactory.java @@ -0,0 +1,199 @@ +/* + * 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.node; + +import java.lang.reflect.InvocationTargetException; + +import org.oasisopen.sca.CallableReference; +import org.oasisopen.sca.ServiceReference; +import org.oasisopen.sca.ServiceRuntimeException; + +/** + * A factory for SCA processing nodes. An SCA processing node can be loaded + * with an SCA composite and the SCA contributions required by the composite. + * + * @version $Rev$ $Date$ + */ +public abstract class NodeFactory { + + public static class NodeProxy implements Node, Client { + private Object node; + + private NodeProxy(Object node) { + super(); + this.node = node; + } + + public static <T> T createProxy(Class<T> type, Object node) { + try { + return type.getDeclaredConstructor(Object.class).newInstance(node); + } catch (Exception e) { + throw new IllegalArgumentException(e); + } + } + + public <B, R extends CallableReference<B>> R cast(B target) throws IllegalArgumentException { + try { + return (R)node.getClass().getMethod("cast", Object.class).invoke(node, target); + } catch (Throwable e) { + handleException(e); + return null; + } + } + + public <B> B getService(Class<B> businessInterface, String serviceName) { + try { + return (B)node.getClass().getMethod("getService", Class.class, String.class).invoke(node, + businessInterface, + serviceName); + } catch (Throwable e) { + handleException(e); + return null; + } + } + + public <B> ServiceReference<B> getServiceReference(Class<B> businessInterface, String serviceName) { + try { + return (ServiceReference<B>)node.getClass().getMethod("getServiceReference", Class.class, String.class) + .invoke(node, businessInterface, serviceName); + } catch (Throwable e) { + handleException(e); + return null; + } + } + + public void start() { + try { + node.getClass().getMethod("start").invoke(node); + } catch (Throwable e) { + handleException(e); + } + } + + public void stop() { + try { + node.getClass().getMethod("stop").invoke(node); + } catch (Throwable e) { + handleException(e); + } + } + + public void destroy() { + try { + node.getClass().getMethod("destroy").invoke(node); + } catch (Throwable e) { + handleException(e); + } + } + + private static void handleException(Throwable ex) { + if (ex instanceof InvocationTargetException) { + ex = ((InvocationTargetException)ex).getTargetException(); + } + if (ex instanceof RuntimeException) { + throw (RuntimeException)ex; + } + if (ex instanceof Error) { + throw (Error)ex; + } else { + throw new RuntimeException(ex); + } + } + + } + + /** + * Returns a new SCA node factory instance. + * + * @return a new SCA node factory + */ + public static NodeFactory newInstance() { + NodeFactory scaNodeFactory = null; + + try { + // final ClassLoader classLoader = Thread.currentThread().getContextClassLoader(); + // Use reflection APIs to call ServiceDiscovery to avoid hard dependency to tuscany-extensibility + try { + Class<?> discoveryClass = Class.forName("org.apache.tuscany.sca.extensibility.ServiceDiscovery"); + Object instance = discoveryClass.getMethod("getInstance").invoke(null); + Object factoryDeclaration = discoveryClass.getMethod("getFirstServiceDeclaration", String.class).invoke(instance, NodeFactory.class.getName()); + if (factoryDeclaration != null) { + Class<?> factoryImplClass = (Class<?>)factoryDeclaration.getClass().getMethod("loadClass").invoke(factoryDeclaration); + scaNodeFactory = (NodeFactory)factoryImplClass.newInstance(); + return scaNodeFactory; + } + } catch (ClassNotFoundException e) { + // Ignore + } + + // Fail back to default impl + String className = "org.apache.tuscany.sca.node.impl.NodeFactoryImpl"; + + Class<?> cls = Class.forName(className); + scaNodeFactory = (NodeFactory)cls.newInstance(); + return scaNodeFactory; + + } catch (Exception e) { + throw new ServiceRuntimeException(e); + } + } + + /** + * Creates a new SCA node using defaults for the contribution location and runnable composite + * + * @return a new SCA node. + */ + public abstract Node createNode(); + + /** + * Creates a new SCA node from the configuration URL + * + * @param configurationURL the URL of the node configuration which is the ATOM feed + * that contains the URI of the composite and a collection of URLs for the contributions + * + * @return a new SCA node. + */ + public abstract Node createNode(String configurationURL); + + /** + * Creates a new SCA node. + * + * @param compositeURI the URI of the composite to use + * @param contributions the URI of the contributions that provides the composites and related + * artifacts. If the list is empty, then we will use the thread context classloader to discover + * the contribution on the classpath + * + * @return a new SCA node. + */ + public abstract Node createNode(String compositeURI, Contribution... contributions); + + /** + * Creates a new SCA node. + * + * @param compositeURI the URI of the composite to use + * @param compositeContent the XML content of the composite to use + * @param contributions the URI of the contributions that provides the composites and related artifacts + * @return a new SCA node. + */ + public abstract Node createNode(String compositeURI, + String compositeContent, + Contribution... contributions); + +} |