1 files changed, 426 insertions, 0 deletions
diff --git a/sandbox/event/modules/binding-gdata-runtime/src/main/java/org/apache/tuscany/sca/binding/gdata/provider/GDataBindingListenerServlet.java b/sandbox/event/modules/binding-gdata-runtime/src/main/java/org/apache/tuscany/sca/binding/gdata/provider/GDataBindingListenerServlet.java
new file mode 100644
index 0000000000..1f9318070d
--- /dev/null
+++ b/sandbox/event/modules/binding-gdata-runtime/src/main/java/org/apache/tuscany/sca/binding/gdata/provider/GDataBindingListenerServlet.java
@@ -0,0 +1,426 @@
+/*
+ * 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.binding.gdata.provider;
+
+import com.google.gdata.data.BaseEntry;
+import com.google.gdata.data.BaseFeed;
+import com.google.gdata.data.ExtensionProfile;
+import com.google.gdata.data.Link;
+import com.google.gdata.data.ParseSource;
+import com.google.gdata.util.ServiceException;
+import com.google.gdata.util.common.xml.XmlWriter;
+import java.io.IOException;
+import java.net.URLDecoder;
+import java.util.logging.Logger;
+import javax.servlet.ServletException;
+import javax.servlet.http.HttpServlet;
+import javax.servlet.http.HttpServletRequest;
+import javax.servlet.http.HttpServletResponse;
+import org.apache.tuscany.sca.invocation.Invoker;
+import org.apache.tuscany.sca.runtime.RuntimeWire;
+import org.apache.tuscany.sca.invocation.MessageFactory;
+import org.apache.tuscany.sca.databinding.Mediator;
+import org.apache.tuscany.sca.interfacedef.Operation;
+import org.apache.tuscany.sca.invocation.InvocationChain;
+import org.apache.tuscany.sca.invocation.Message;
+
+class GDataBindingListenerServlet extends HttpServlet {
+
+    private static final Logger logger = Logger.getLogger(GDataBindingListenerServlet.class.getName());
+    private RuntimeWire wire;
+    private Invoker getFeedInvoker;
+    private Invoker queryInvoker;
+    private Invoker getInvoker;
+    private Invoker postInvoker;
+    private Invoker postMediaInvoker;
+    private Invoker putInvoker;
+    private Invoker putMediaInvoker;
+    private Invoker deleteInvoker;
+    private MessageFactory messageFactory;
+    private String title;
+    private Mediator mediator;
+//    private DataType<?> itemClassType;
+//    private DataType<?> itemXMLType;
+//    private boolean supportsFeedEntries;
+
+    GDataBindingListenerServlet(RuntimeWire wire, MessageFactory messageFactory, Mediator mediator, String title) {
+        this.wire = wire;
+        this.messageFactory = messageFactory;
+        this.mediator = mediator;
+        this.title = title;
+
+        // Get the invokers for the supported operations
+        //Operation getOperation = null;
+        for (InvocationChain invocationChain : this.wire.getInvocationChains()) {
+            invocationChain.setAllowsPassByReference(true);
+            Operation operation = invocationChain.getTargetOperation();
+            String operationName = operation.getName();
+            if (operationName.equals("getFeed")) {
+                getFeedInvoker = invocationChain.getHeadInvoker();
+            } else if (operationName.equals("query")) {
+                queryInvoker = invocationChain.getHeadInvoker();
+            } else if (operationName.equals("get")) {
+                getInvoker = invocationChain.getHeadInvoker();
+                //getOperation = operation;
+            } else if (operationName.equals("put")) {
+                putInvoker = invocationChain.getHeadInvoker();
+            } else if (operationName.equals("putMedia")) {
+                putMediaInvoker = invocationChain.getHeadInvoker();
+            } else if (operationName.equals("post")) {
+                postInvoker = invocationChain.getHeadInvoker();
+            } else if (operationName.equals("postMedia")) {
+                postMediaInvoker = invocationChain.getHeadInvoker();
+            } else if (operationName.equals("delete")) {
+                deleteInvoker = invocationChain.getHeadInvoker();
+            }
+        }
+
+//        // Determine the collection item type
+//        itemXMLType = new DataTypeImpl<Class<?>>(String.class.getName(), String.class, String.class);
+//        Class<?> itemClass = getOperation.getOutputType().getPhysical();
+//        if (itemClass == BaseEntry.class) {
+//            supportsFeedEntries = true;
+//        }
+//        DataType<XMLType> outputType = getOperation.getOutputType();
+//        QName qname = outputType.getLogical().getElementName();
+//        qname = new QName(qname.getNamespaceURI(), itemClass.getSimpleName());
+//        itemClassType = new DataTypeImpl<XMLType>("java:complexType", itemClass, new XMLType(qname, null));
+    }
+
+    @Override
+    protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
+
+        int servletPathLength = request.getContextPath().length() + request.getServletPath().length();
+
+        String path = URLDecoder.decode(request.getRequestURI().substring(servletPathLength), "UTF-8");
+
+        logger.fine("get " + request.getRequestURI());
+
+        if (path != null && path.equals("/atomsvc")) {
+            //FIX-ME - Doing nothing
+        } else if (path == null || path.length() == 0 || path.equals("/")) {
+
+            // Return a feed containing the entries in the collection
+            BaseFeed feed = null;
+
+            Message requestMessage = messageFactory.createMessage();
+            Message responseMessage;
+            if (request.getQueryString() != null) {
+                requestMessage.setBody(new Object[]{request.getQueryString()});
+                responseMessage = queryInvoker.invoke(requestMessage);
+            } else {
+                responseMessage = getFeedInvoker.invoke(requestMessage);
+            }
+            if (responseMessage.isFault()) {
+                throw new ServletException((Throwable) responseMessage.getBody());
+            }
+
+            // The service implementation supports feed entries, invoke its getFeed operation
+            feed = (BaseFeed) responseMessage.getBody();
+
+            if (feed != null) {
+
+                // Write the Atom feed
+                response.setContentType("application/atom+xml; charset=utf-8");
+                try {
+
+                    XmlWriter writer = new XmlWriter(response.getWriter());
+                    feed.generateAtom(writer, new ExtensionProfile());
+                    writer.flush();
+                    writer.close();
+
+                } catch (IOException ioe) {
+                    throw new ServletException(ioe);
+                }
+            } else {
+                response.sendError(HttpServletResponse.SC_NOT_FOUND);
+            }
+
+        } else if (path.startsWith("/")) {
+            // Return a specific entry in the collection
+            BaseEntry feedEntry;
+
+            // Invoke the get operation on the service implementation
+            Message requestMessage = messageFactory.createMessage();
+            String id = path.substring(1);
+            requestMessage.setBody(new Object[]{id});
+            Message responseMessage = getInvoker.invoke(requestMessage);
+            if (responseMessage.isFault()) {
+                throw new ServletException((Throwable) responseMessage.getBody());
+            }
+
+            // The service implementation returns a feed entry 
+            feedEntry = responseMessage.getBody();
+
+            // Write the Atom entry
+            if (feedEntry != null) {
+                response.setContentType("application/atom+xml; charset=utf-8");
+                try {
+                    XmlWriter writer = new XmlWriter(response.getWriter());
+                    feedEntry.generateAtom(writer, new ExtensionProfile());
+                    writer.flush();
+                    writer.close();
+                } catch (IOException ioe) {
+                    throw new ServletException(ioe);
+                }
+            } else {
+                response.sendError(HttpServletResponse.SC_NOT_FOUND);
+            }
+        } else {
+            // Path doesn't match any known pattern
+            response.sendError(HttpServletResponse.SC_NOT_FOUND);
+        }
+    }
+
+    @Override
+    protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
+
+        // FIX-ME: Authenticate the user
+
+//        String user = processAuthorizationHeader(request);
+//        if (user == null) {
+//            unauthorized(response);
+//            return;
+//        }
+
+        // Get the request path
+        String path = URLDecoder.decode(request.getRequestURI().substring(request.getServletPath().length()), "UTF-8");
+
+        if (path == null || path.length() == 0 || path.equals("/")) {
+
+            BaseEntry createdFeedEntry = null;
+
+            // Create a new Atom entry
+            String contentType = request.getContentType();
+            if (contentType != null && contentType.startsWith("application/atom+xml")) {
+
+                // Read the entry from the request
+                BaseEntry feedEntry;
+                try {
+                    ParseSource parser = new ParseSource(request.getReader());
+                    feedEntry = BaseEntry.readEntry(parser);
+
+                } catch (ServiceException ex) {
+                    throw new ServletException(ex);
+                }
+
+                // The service implementation supports feed entries, pass the entry to it
+                Message requestMessage = messageFactory.createMessage();
+                requestMessage.setBody(new Object[]{feedEntry});
+                Message responseMessage = postInvoker.invoke(requestMessage);
+
+                if (responseMessage.isFault()) {
+                    throw new ServletException((Throwable) responseMessage.getBody());
+                }
+
+                createdFeedEntry = responseMessage.getBody();
+
+            } else if (contentType != null) {
+
+                // Create a new media entry
+
+                // Get incoming headers
+                String reqTitle = request.getHeader("Title");
+                String slug = request.getHeader("Slug");
+
+                // Let the component implementation create the media entry
+                Message requestMessage = messageFactory.createMessage();
+                requestMessage.setBody(new Object[]{reqTitle, slug, contentType, request.getInputStream()});
+                Message responseMessage = postMediaInvoker.invoke(requestMessage);
+
+                if (responseMessage.isFault()) {
+                    throw new ServletException((Throwable) responseMessage.getBody());
+                }
+                createdFeedEntry = responseMessage.getBody();
+            } else {
+                response.sendError(HttpServletResponse.SC_UNSUPPORTED_MEDIA_TYPE);
+            }
+
+            // A new entry was created successfully
+            if (createdFeedEntry != null) {
+
+                // Set location of the created entry in the Location header
+                Link link = createdFeedEntry.getSelfLink();
+                if (link != null) {
+                    response.addHeader("Location", link.getHref().toString());
+                }
+
+                // Write the created Atom entry
+                response.setStatus(HttpServletResponse.SC_CREATED);
+                response.setContentType("application/atom+xml; charset=utf-8");
+                try {
+
+                    XmlWriter writer = new XmlWriter(response.getWriter());
+                    createdFeedEntry.generateAtom(writer, new ExtensionProfile());
+                    writer.flush();
+                    writer.close();
+
+                } catch (IOException ioe) {
+                    throw new ServletException(ioe);
+                }
+
+            } else {
+                response.sendError(HttpServletResponse.SC_NOT_FOUND);
+            }
+
+        } else {
+            response.sendError(HttpServletResponse.SC_NOT_FOUND);
+        }
+    }
+
+    @Override
+    protected void doPut(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
+
+        // FIX-ME: Authenticate the user
+
+//        String user = processAuthorizationHeader(request);
+//        if (user == null) {
+//            unauthorized(response);
+//            return;
+//        }
+
+        // Get the request path
+        String path = request.getRequestURI().substring(request.getServletPath().length());
+
+        BaseEntry createdFeedEntry = null;
+
+        if (path != null && path.startsWith("/")) {
+            String id = path.substring(1);
+
+            // Update an Atom entry
+            String contentType = request.getContentType();
+            if (contentType != null && contentType.startsWith("application/atom+xml")) {
+
+                // Read the entry from the request
+                BaseEntry feedEntry;
+                try {
+                    ParseSource parser = new ParseSource(request.getReader());
+                    feedEntry = BaseEntry.readEntry(parser);
+
+                } catch (ServiceException ex) {
+                    throw new ServletException(ex);
+                }
+
+                // Let the component implementation create it
+
+                // The service implementation supports feed entries, pass the entry to it
+                Message requestMessage = messageFactory.createMessage();
+                requestMessage.setBody(new Object[]{id, feedEntry});
+                Message responseMessage = putInvoker.invoke(requestMessage);
+
+                if (responseMessage.isFault()) {
+                    Object body = responseMessage.getBody();
+                    if (body.getClass().getName().endsWith(".NotFoundException")) {
+                        response.sendError(HttpServletResponse.SC_NOT_FOUND);
+                    } else {
+                        throw new ServletException((Throwable) responseMessage.getBody());
+                    }
+                }
+
+                createdFeedEntry = responseMessage.getBody();
+
+            } else if (contentType != null) {
+
+                // Updated a media entry
+
+                // Let the component implementation create the media entry
+                Message requestMessage = messageFactory.createMessage();
+                requestMessage.setBody(new Object[]{id, contentType, request.getInputStream()});
+                Message responseMessage = putMediaInvoker.invoke(requestMessage);
+                Object body = responseMessage.getBody();
+                if (responseMessage.isFault()) {
+                    if (body.getClass().getName().endsWith(".NotFoundException")) {
+                        response.sendError(HttpServletResponse.SC_NOT_FOUND);
+                    } else {
+                        throw new ServletException((Throwable) responseMessage.getBody());
+                    }
+                }
+
+                createdFeedEntry = responseMessage.getBody();
+
+            } else {
+                response.sendError(HttpServletResponse.SC_UNSUPPORTED_MEDIA_TYPE);
+            }
+
+            // A new entry was created successfully
+            if (createdFeedEntry != null) {
+
+                // Set location of the created entry in the Location header
+                Link link = createdFeedEntry.getSelfLink();
+                if (link != null) {
+                    response.addHeader("Location", link.getHref().toString());
+                }
+
+                // Write the created Atom entry
+                response.setStatus(HttpServletResponse.SC_CREATED);
+                response.setContentType("application/atom+xml; charset=utf-8");
+                try {
+
+                    XmlWriter writer = new XmlWriter(response.getWriter());
+                    createdFeedEntry.generateAtom(writer, new ExtensionProfile());
+                    writer.flush();
+                    writer.close();
+
+                } catch (IOException ioe) {
+                    throw new ServletException(ioe);
+                }
+
+            } else {
+                response.sendError(HttpServletResponse.SC_NOT_FOUND);
+            }
+
+        } else {
+            response.sendError(HttpServletResponse.SC_NOT_FOUND);
+        }
+    }
+
+    @Override
+    protected void doDelete(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
+        
+        // FIX-ME: Authenticate the user
+//        String user = processAuthorizationHeader(request);
+//        if (user == null) {
+//            unauthorized(response);
+//            return;
+//        }
+
+        // Get the request path
+        String path = URLDecoder.decode(request.getRequestURI().substring(request.getServletPath().length()), "UTF-8");
+
+        String id;
+        if (path != null && path.startsWith("/")) {
+            id = path.substring(1);
+        } else {
+            id = "";
+        }
+
+        // Delete a specific entry from the collection
+        Message requestMessage = messageFactory.createMessage();
+        requestMessage.setBody(new Object[]{id});
+        Message responseMessage = deleteInvoker.invoke(requestMessage);
+        if (responseMessage.isFault()) {
+            Object body = responseMessage.getBody();
+            if (body.getClass().getName().endsWith(".NotFoundException")) {
+                response.sendError(HttpServletResponse.SC_NOT_FOUND);
+            } else {
+                throw new ServletException((Throwable) responseMessage.getBody());
+            }
+        }
+    }
+}