1 files changed, 255 insertions, 0 deletions
diff --git a/sca-java-1.x/tags/1.6.1-TUSCANY-3909/domain-manager/src/main/java/org/apache/tuscany/sca/domain/manager/impl/CompositeGeneratorServiceImpl.java b/sca-java-1.x/tags/1.6.1-TUSCANY-3909/domain-manager/src/main/java/org/apache/tuscany/sca/domain/manager/impl/CompositeGeneratorServiceImpl.java
new file mode 100644
index 0000000000..c476d82e72
--- /dev/null
+++ b/sca-java-1.x/tags/1.6.1-TUSCANY-3909/domain-manager/src/main/java/org/apache/tuscany/sca/domain/manager/impl/CompositeGeneratorServiceImpl.java
@@ -0,0 +1,255 @@
+/*
+ * 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.domain.manager.impl;
+
+import static org.apache.tuscany.sca.domain.manager.impl.DomainManagerUtil.compositeQName;
+import static org.apache.tuscany.sca.domain.manager.impl.DomainManagerUtil.contributionURI;
+import static org.apache.tuscany.sca.domain.manager.impl.DomainManagerUtil.lastModified;
+import static org.apache.tuscany.sca.domain.manager.impl.DomainManagerUtil.locationURL;
+
+import java.io.IOException;
+import java.net.MalformedURLException;
+import java.net.URI;
+import java.net.URL;
+import java.net.URLDecoder;
+import java.util.HashMap;
+import java.util.Map;
+import java.util.logging.Logger;
+
+import javax.servlet.Servlet;
+import javax.servlet.ServletException;
+import javax.servlet.ServletOutputStream;
+import javax.servlet.http.HttpServlet;
+import javax.servlet.http.HttpServletRequest;
+import javax.servlet.http.HttpServletResponse;
+import javax.xml.namespace.QName;
+import javax.xml.parsers.ParserConfigurationException;
+import javax.xml.stream.XMLInputFactory;
+import javax.xml.stream.XMLOutputFactory;
+import javax.xml.stream.XMLStreamException;
+
+import org.apache.tuscany.sca.assembly.Composite;
+import org.apache.tuscany.sca.contribution.Contribution;
+import org.apache.tuscany.sca.contribution.ModelFactoryExtensionPoint;
+import org.apache.tuscany.sca.contribution.processor.ExtensibleStAXArtifactProcessor;
+import org.apache.tuscany.sca.contribution.processor.ExtensibleURLArtifactProcessor;
+import org.apache.tuscany.sca.contribution.processor.StAXArtifactProcessor;
+import org.apache.tuscany.sca.contribution.processor.StAXArtifactProcessorExtensionPoint;
+import org.apache.tuscany.sca.contribution.processor.URLArtifactProcessor;
+import org.apache.tuscany.sca.contribution.processor.URLArtifactProcessorExtensionPoint;
+import org.apache.tuscany.sca.contribution.resolver.DefaultModelResolver;
+import org.apache.tuscany.sca.contribution.resolver.ModelResolverExtensionPoint;
+import org.apache.tuscany.sca.contribution.service.ContributionReadException;
+import org.apache.tuscany.sca.contribution.service.ContributionResolveException;
+import org.apache.tuscany.sca.contribution.service.ContributionWriteException;
+import org.apache.tuscany.sca.core.ExtensionPointRegistry;
+import org.apache.tuscany.sca.core.UtilityExtensionPoint;
+import org.apache.tuscany.sca.data.collection.Item;
+import org.apache.tuscany.sca.data.collection.LocalItemCollection;
+import org.apache.tuscany.sca.data.collection.NotFoundException;
+import org.apache.tuscany.sca.domain.manager.impl.CompositeGeneratorServiceImpl.Cache.ContributionCache;
+import org.apache.tuscany.sca.monitor.Monitor;
+import org.apache.tuscany.sca.monitor.MonitorFactory;
+import org.apache.tuscany.sca.workspace.processor.impl.ContributionContentProcessor;
+import org.osoa.sca.annotations.Init;
+import org.osoa.sca.annotations.Reference;
+import org.osoa.sca.annotations.Scope;
+import org.osoa.sca.annotations.Service;
+
+/**
+ * Implementation of a service that generates a composite from a composite model. 
+ *
+ * @version $Rev$ $Date$
+ */
+@Scope("COMPOSITE")
+@Service(interfaces={Servlet.class})
+public class CompositeGeneratorServiceImpl extends HttpServlet implements Servlet {
+    private static final long serialVersionUID = -6531448326726908269L;
+
+    private static final Logger logger = Logger.getLogger(CompositeGeneratorServiceImpl.class.getName());
+
+    @Reference
+    public LocalItemCollection contributionCollection;
+    
+    @Reference
+    public DomainManagerConfiguration domainManagerConfiguration;
+    
+    private ModelFactoryExtensionPoint modelFactories;
+    private ModelResolverExtensionPoint modelResolvers;
+    private URLArtifactProcessor<Contribution> contributionProcessor;
+    private StAXArtifactProcessor<Composite> compositeProcessor;
+    private XMLOutputFactory outputFactory;
+    
+    /**
+     * Cache contribution models. 
+     */
+    static class Cache {
+        static class ContributionCache {
+            private Contribution contribution;
+            private long contributionLastModified;
+        }
+        private Map<URL, ContributionCache> contributions = new HashMap<URL, ContributionCache>();
+    }
+    
+    private Cache cache = new Cache();
+    
+    /**
+     * Initialize the component.
+     */
+    @Init
+    public void initialize() throws ParserConfigurationException {
+        
+        ExtensionPointRegistry extensionPoints = domainManagerConfiguration.getExtensionPoints();
+        
+        // Create a monitor
+        UtilityExtensionPoint services = extensionPoints.getExtensionPoint(UtilityExtensionPoint.class);
+        MonitorFactory monitorFactory = services.getUtility(MonitorFactory.class);
+        Monitor monitor = monitorFactory.createMonitor();
+        
+        // Get model factories
+        modelFactories = extensionPoints.getExtensionPoint(ModelFactoryExtensionPoint.class);
+        XMLInputFactory inputFactory = modelFactories.getFactory(XMLInputFactory.class);
+        outputFactory = modelFactories.getFactory(XMLOutputFactory.class);
+        outputFactory.setProperty(XMLOutputFactory.IS_REPAIRING_NAMESPACES, true);
+        
+        // Get and initialize artifact processors
+        StAXArtifactProcessorExtensionPoint staxProcessors = extensionPoints.getExtensionPoint(StAXArtifactProcessorExtensionPoint.class);
+        compositeProcessor = (StAXArtifactProcessor<Composite>)staxProcessors.getProcessor(Composite.class);
+        StAXArtifactProcessor<Object> staxProcessor = new ExtensibleStAXArtifactProcessor(staxProcessors, inputFactory, outputFactory, monitor);
+
+        URLArtifactProcessorExtensionPoint urlProcessors = extensionPoints.getExtensionPoint(URLArtifactProcessorExtensionPoint.class);
+        URLArtifactProcessor<Object> urlProcessor = new ExtensibleURLArtifactProcessor(urlProcessors, monitor);
+        
+        // Create contribution processor
+        modelResolvers = extensionPoints.getExtensionPoint(ModelResolverExtensionPoint.class);
+        contributionProcessor = new ContributionContentProcessor(extensionPoints, monitor);
+    }
+    
+    @Override
+    protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
+
+        // Expect a key in the form
+        // composite:contributionURI;namespace;localName
+        // and return the corresponding source file
+        
+        // Get the request path
+        String path = URLDecoder.decode(request.getRequestURI().substring(request.getServletPath().length()), "UTF-8");
+        String key = path.startsWith("/")? path.substring(1) : path;
+        logger.fine("get " + key);
+        
+        // Get the specified contribution info 
+        String contributionURI = contributionURI(key);
+        Item contributionItem;
+        try {
+            contributionItem = contributionCollection.get(contributionURI);
+        } catch (NotFoundException e) {
+            response.sendError(HttpServletResponse.SC_NOT_FOUND, key);
+            return;
+        }
+        
+        // Read the contribution
+        Contribution contribution;
+        try {
+            contribution = contribution(contributionURI, contributionItem.getAlternate());
+        } catch (ContributionReadException e) {
+            response.sendError(HttpServletResponse.SC_NOT_FOUND, key);
+            return;
+        }
+
+        // Find the specified deployable composite
+        QName qname = compositeQName(key);
+        Composite composite = null;
+        for (Composite deployable: contribution.getDeployables()) {
+            if (qname.equals(deployable.getName())) {
+                if (!deployable.isUnresolved()) {
+                    composite = deployable;
+                }
+                break;
+            }
+        }
+        if (composite == null) {
+            response.sendError(HttpServletResponse.SC_NOT_FOUND, key);
+            return;
+        }
+        
+        // Write the composite
+        response.setContentType("text/xml");
+        ServletOutputStream os = response.getOutputStream();
+        try {
+            compositeProcessor.write(composite, outputFactory.createXMLStreamWriter(os));
+        } catch (ContributionWriteException e) {
+            response.sendError(HttpServletResponse.SC_INTERNAL_SERVER_ERROR, e.toString());
+            return;
+        } catch (XMLStreamException e) {
+            response.sendError(HttpServletResponse.SC_INTERNAL_SERVER_ERROR, e.toString());
+            return;
+        }
+        os.flush();
+    }
+
+    /**
+     * Returns the contribution with the given URI.
+     * 
+     * @param contributionURI
+     * @param contributionLocation
+     * @return
+     * @throws NotFoundException
+     */
+    private Contribution contribution(String contributionURI, String contributionLocation) throws ContributionReadException {
+        try {
+            URI uri = URI.create(contributionURI);
+            URL location = locationURL(contributionLocation);
+
+            // Get contribution from cache
+            ContributionCache contributionCache = cache.contributions.get(location);
+            long lastModified = lastModified(location);
+            if (contributionCache != null) {
+                if (contributionCache.contributionLastModified == lastModified) {
+                    return contributionCache.contribution;
+                }
+                
+                // Reset contribution cache
+                cache.contributions.remove(location);
+            }
+            
+            Contribution contribution = (Contribution)contributionProcessor.read(null, uri, location);
+            
+            contributionProcessor.resolve(contribution, new DefaultModelResolver());
+
+            // Cache contribution
+            contributionCache = new ContributionCache();
+            contributionCache.contribution = contribution;
+            contributionCache.contributionLastModified = lastModified;
+            cache.contributions.put(location, contributionCache);
+            
+            return contribution;
+
+        } catch (ContributionReadException e) {
+            throw e;
+        } catch (MalformedURLException e) {
+            throw new ContributionReadException(e);
+        } catch (IOException e) {
+            throw new ContributionReadException(e);
+        } catch (ContributionResolveException e) {
+            throw new ContributionReadException(e);
+        }
+    }
+    
+}