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Diffstat (limited to '')
-rw-r--r-- | sca-java-2.x/branches/2.0-Beta1/modules/assembly-xml/src/main/java/org/apache/tuscany/sca/definitions/xml/DefaultDefinitionsExtensionPoint.java | 128 |
1 files changed, 128 insertions, 0 deletions
diff --git a/sca-java-2.x/branches/2.0-Beta1/modules/assembly-xml/src/main/java/org/apache/tuscany/sca/definitions/xml/DefaultDefinitionsExtensionPoint.java b/sca-java-2.x/branches/2.0-Beta1/modules/assembly-xml/src/main/java/org/apache/tuscany/sca/definitions/xml/DefaultDefinitionsExtensionPoint.java new file mode 100644 index 0000000000..af59324c7c --- /dev/null +++ b/sca-java-2.x/branches/2.0-Beta1/modules/assembly-xml/src/main/java/org/apache/tuscany/sca/definitions/xml/DefaultDefinitionsExtensionPoint.java @@ -0,0 +1,128 @@ +/* + * 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.definitions.xml; + +import java.io.IOException; +import java.net.URI; +import java.net.URL; +import java.util.ArrayList; +import java.util.Collection; +import java.util.HashSet; +import java.util.List; +import java.util.Set; +import java.util.logging.Level; +import java.util.logging.Logger; + +import org.apache.tuscany.sca.contribution.processor.ContributionReadException; +import org.apache.tuscany.sca.contribution.processor.ProcessorContext; +import org.apache.tuscany.sca.contribution.processor.URLArtifactProcessor; +import org.apache.tuscany.sca.contribution.processor.URLArtifactProcessorExtensionPoint; +import org.apache.tuscany.sca.core.ExtensionPointRegistry; +import org.apache.tuscany.sca.core.UtilityExtensionPoint; +import org.apache.tuscany.sca.definitions.Definitions; +import org.apache.tuscany.sca.extensibility.ServiceDeclaration; +import org.apache.tuscany.sca.extensibility.ServiceDiscovery; +import org.apache.tuscany.sca.monitor.MonitorFactory; + +/** + * Default implementation of an extension point for XML definitionss. + * + * @version $Rev$ $Date$ + */ +public class DefaultDefinitionsExtensionPoint implements DefinitionsExtensionPoint { + private static final Logger logger = Logger.getLogger(DefaultDefinitionsExtensionPoint.class.getName()); + private static final URI DEFINITIONS_URI = URI.create("META-INF/definitions.xml"); + private ExtensionPointRegistry registry; + private MonitorFactory monitorFactory; + private Set<URL> documents = new HashSet<URL>(); + private List<Definitions> definitions = new ArrayList<Definitions>(); + private boolean documentsLoaded; + private boolean loaded; + + public DefaultDefinitionsExtensionPoint(ExtensionPointRegistry registry) { + this.registry = registry; + this.monitorFactory = registry.getExtensionPoint(UtilityExtensionPoint.class).getUtility(MonitorFactory.class); + } + + public void addDefinitionsDocument(URL url) { + documents.add(url); + } + + public void removeDefinitionsDocument(URL url) { + documents.remove(url); + } + + /** + * Load definitions declarations from META-INF/services/ + * org.apache.tuscany.sca.contribution.processor.Definitions files + */ + private synchronized void loadDefinitionsDocuments() { + if (documentsLoaded) + return; + + // Get the definitions declarations + Collection<ServiceDeclaration> definitionsDeclarations; + try { + definitionsDeclarations = registry.getServiceDiscovery().getServiceDeclarations(DEFINITIONS_FILE); + } catch (IOException e) { + throw new IllegalStateException(e); + } + + // Find each definitions + for (ServiceDeclaration definitionsDeclaration : definitionsDeclarations) { + URL url = definitionsDeclaration.getResource(definitionsDeclaration.getClassName()); + if (url == null) { + throw new IllegalArgumentException(definitionsDeclaration.getClassName() + " cannot be found"); + } + documents.add(url); + } + + documentsLoaded = true; + } + + public synchronized List<Definitions> getDefinitions() { + if (!loaded) { + loadDefinitionsDocuments(); + URLArtifactProcessorExtensionPoint processors = + registry.getExtensionPoint(URLArtifactProcessorExtensionPoint.class); + URLArtifactProcessor<Definitions> processor = processors.getProcessor(Definitions.class); + ProcessorContext context = new ProcessorContext(monitorFactory.createMonitor()); + for (URL url : documents) { + Definitions def; + try { + def = processor.read(null, DEFINITIONS_URI, url, context); + definitions.add(def); + } catch (ContributionReadException e) { + logger.log(Level.SEVERE, e.getMessage(), e); + } + } + loaded = true; + } + return definitions; + } + + public void addDefinitions(Definitions def) { + this.definitions.add(def); + } + + public void removeDefinitions(Definitions def) { + this.definitions.remove(def); + } +} |