diff options
Diffstat (limited to 'sca-java-2.x/tags/2.0-Beta4-RC1/modules/core-spi/src/main/java/org/apache/tuscany/sca/runtime/DefaultWireProcessorExtensionPoint.java')
-rw-r--r-- | sca-java-2.x/tags/2.0-Beta4-RC1/modules/core-spi/src/main/java/org/apache/tuscany/sca/runtime/DefaultWireProcessorExtensionPoint.java | 127 |
1 files changed, 127 insertions, 0 deletions
diff --git a/sca-java-2.x/tags/2.0-Beta4-RC1/modules/core-spi/src/main/java/org/apache/tuscany/sca/runtime/DefaultWireProcessorExtensionPoint.java b/sca-java-2.x/tags/2.0-Beta4-RC1/modules/core-spi/src/main/java/org/apache/tuscany/sca/runtime/DefaultWireProcessorExtensionPoint.java new file mode 100644 index 0000000000..283d1d1a8b --- /dev/null +++ b/sca-java-2.x/tags/2.0-Beta4-RC1/modules/core-spi/src/main/java/org/apache/tuscany/sca/runtime/DefaultWireProcessorExtensionPoint.java @@ -0,0 +1,127 @@ +/* + * 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.runtime; + +import java.lang.reflect.Constructor; +import java.util.ArrayList; +import java.util.Collection; +import java.util.List; + +import org.apache.tuscany.sca.core.ExtensionPointRegistry; +import org.apache.tuscany.sca.core.LifeCycleListener; +import org.apache.tuscany.sca.extensibility.ServiceDeclaration; +import org.apache.tuscany.sca.extensibility.ServiceDiscovery; + +/** + * The default implementation of a <code>WireProcessorExtensionPoint</code> + * + * @version $Rev$ $Date$ + */ +public class DefaultWireProcessorExtensionPoint implements RuntimeWireProcessorExtensionPoint, LifeCycleListener { + private ExtensionPointRegistry registry; + private boolean loaded; + + /** + * @param registry + */ + public DefaultWireProcessorExtensionPoint(ExtensionPointRegistry registry) { + super(); + this.registry = registry; + } + + /** + * The list of WireProcessors available to the runtime + */ + private final List<RuntimeWireProcessor> processors = new ArrayList<RuntimeWireProcessor>(); + + /** + * Registers a wire-processor in the runtime + * + * @param processor The processor to register + */ + public void addWireProcessor(RuntimeWireProcessor processor) { + processors.add(processor); + if (processor instanceof LifeCycleListener) { + ((LifeCycleListener)processor).start(); + } + } + + /** + * De-registers a wire-processor in the runtime + * + * @param processor The processor to de-register + */ + public void removeWireProcessor(RuntimeWireProcessor processor) { + boolean found = processors.remove(processor); + if (found && (processor instanceof LifeCycleListener)) { + ((LifeCycleListener)processor).stop(); + } + } + + /** + * Returns a list of registered wire-processors. + * + * @return The list of wire processors + */ + public List<RuntimeWireProcessor> getWireProcessors() { + loadWireProcessors(); + return processors; + } + + private synchronized void loadWireProcessors() { + if (loaded) { + return; + } + try { + Collection<ServiceDeclaration> sds = + registry.getServiceDiscovery().getServiceDeclarations(RuntimeWireProcessor.class, true); + for (ServiceDeclaration sd : sds) { + Class type = sd.loadClass(); + Constructor constructor = null; + RuntimeWireProcessor processor = null; + try { + constructor = type.getConstructor(ExtensionPointRegistry.class); + processor = (RuntimeWireProcessor)constructor.newInstance(registry); + + } catch (NoSuchMethodException e) { + constructor = type.getConstructor(); + processor = (RuntimeWireProcessor)constructor.newInstance(); + } + if (processor != null) { + addWireProcessor(processor); + } + } + loaded = true; + } catch (Throwable e) { + throw new IllegalStateException(e); + } + } + + public void start() { + } + + public void stop() { + for (RuntimeWireProcessor processor : processors) { + if ((processor instanceof LifeCycleListener)) { + ((LifeCycleListener)processor).stop(); + } + } + processors.clear(); + } +} |