From fd81479b8cee7c161438f66a74d7863b88736e6e Mon Sep 17 00:00:00 2001
From: fmoga <fmoga@13f79535-47bb-0310-9956-ffa450edef68>
Date: Wed, 28 Jul 2010 21:06:51 +0000
Subject: Added initial sources to binding-comet-runtime.

git-svn-id: http://svn.us.apache.org/repos/asf/tuscany@980229 13f79535-47bb-0310-9956-ffa450edef68
---
 .../comet/runtime/CometBindingProviderFactory.java |  52 +++++++
 .../sca/binding/comet/runtime/CometInvoker.java    | 162 ++++++++++++++++++++
 .../runtime/CometReferenceBindingProvider.java     |  54 +++++++
 .../comet/runtime/CometServiceBindingProvider.java |  69 +++++++++
 .../sca/binding/comet/runtime/CometServlet.java    | 163 +++++++++++++++++++++
 5 files changed, 500 insertions(+)
 create mode 100644 sca-java-2.x/contrib/modules/binding-comet-runtime/src/main/java/org/apache/tuscany/sca/binding/comet/runtime/CometBindingProviderFactory.java
 create mode 100644 sca-java-2.x/contrib/modules/binding-comet-runtime/src/main/java/org/apache/tuscany/sca/binding/comet/runtime/CometInvoker.java
 create mode 100644 sca-java-2.x/contrib/modules/binding-comet-runtime/src/main/java/org/apache/tuscany/sca/binding/comet/runtime/CometReferenceBindingProvider.java
 create mode 100644 sca-java-2.x/contrib/modules/binding-comet-runtime/src/main/java/org/apache/tuscany/sca/binding/comet/runtime/CometServiceBindingProvider.java
 create mode 100644 sca-java-2.x/contrib/modules/binding-comet-runtime/src/main/java/org/apache/tuscany/sca/binding/comet/runtime/CometServlet.java

(limited to 'sca-java-2.x/contrib/modules/binding-comet-runtime/src/main/java/org/apache/tuscany/sca')

diff --git a/sca-java-2.x/contrib/modules/binding-comet-runtime/src/main/java/org/apache/tuscany/sca/binding/comet/runtime/CometBindingProviderFactory.java b/sca-java-2.x/contrib/modules/binding-comet-runtime/src/main/java/org/apache/tuscany/sca/binding/comet/runtime/CometBindingProviderFactory.java
new file mode 100644
index 0000000000..747ea4d78e
--- /dev/null
+++ b/sca-java-2.x/contrib/modules/binding-comet-runtime/src/main/java/org/apache/tuscany/sca/binding/comet/runtime/CometBindingProviderFactory.java
@@ -0,0 +1,52 @@
+/*
+ * 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.comet.runtime;
+
+import org.apache.tuscany.sca.binding.comet.CometBinding;
+import org.apache.tuscany.sca.core.ExtensionPointRegistry;
+import org.apache.tuscany.sca.host.http.ServletHost;
+import org.apache.tuscany.sca.host.http.ServletHostHelper;
+import org.apache.tuscany.sca.provider.BindingProviderFactory;
+import org.apache.tuscany.sca.provider.ReferenceBindingProvider;
+import org.apache.tuscany.sca.provider.ServiceBindingProvider;
+import org.apache.tuscany.sca.runtime.RuntimeEndpoint;
+import org.apache.tuscany.sca.runtime.RuntimeEndpointReference;
+
+public class CometBindingProviderFactory implements BindingProviderFactory<CometBinding> {
+
+    private ServletHost servletHost;
+
+    public CometBindingProviderFactory(ExtensionPointRegistry extensionPoints) {
+        this.servletHost = ServletHostHelper.getServletHost(extensionPoints);
+    }
+
+    public Class<CometBinding> getModelType() {
+        return CometBinding.class;
+    }
+
+    public ReferenceBindingProvider createReferenceBindingProvider(RuntimeEndpointReference endpoint) {
+        return new CometReferenceBindingProvider(endpoint);
+    }
+
+    public ServiceBindingProvider createServiceBindingProvider(RuntimeEndpoint endpoint) {
+        return new CometServiceBindingProvider(endpoint, servletHost);
+    }
+
+}
diff --git a/sca-java-2.x/contrib/modules/binding-comet-runtime/src/main/java/org/apache/tuscany/sca/binding/comet/runtime/CometInvoker.java b/sca-java-2.x/contrib/modules/binding-comet-runtime/src/main/java/org/apache/tuscany/sca/binding/comet/runtime/CometInvoker.java
new file mode 100644
index 0000000000..6c3801f04d
--- /dev/null
+++ b/sca-java-2.x/contrib/modules/binding-comet-runtime/src/main/java/org/apache/tuscany/sca/binding/comet/runtime/CometInvoker.java
@@ -0,0 +1,162 @@
+/*
+ * 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.comet.runtime;
+
+import java.io.BufferedReader;
+import java.io.ByteArrayOutputStream;
+import java.io.IOException;
+import java.io.InputStream;
+import java.io.InputStreamReader;
+
+import org.apache.commons.codec.EncoderException;
+import org.apache.commons.codec.net.URLCodec;
+import org.apache.http.HttpEntity;
+import org.apache.http.HttpResponse;
+import org.apache.http.client.HttpClient;
+import org.apache.http.client.methods.HttpGet;
+import org.apache.http.impl.client.DefaultHttpClient;
+import org.apache.tuscany.sca.assembly.EndpointReference;
+import org.apache.tuscany.sca.interfacedef.Operation;
+import org.apache.tuscany.sca.invocation.Invoker;
+import org.apache.tuscany.sca.invocation.Message;
+import org.codehaus.jackson.JsonGenerationException;
+import org.codehaus.jackson.JsonParseException;
+import org.codehaus.jackson.map.JsonMappingException;
+import org.codehaus.jackson.map.ObjectMapper;
+
+// TODO
+public class CometInvoker implements Invoker {
+    
+    protected Operation operation;
+    protected EndpointReference endpoint;
+
+    protected ObjectMapper mapper; // TODO: share mapper btw invoker and servlet or move to databinding
+
+    public CometInvoker(Operation operation, EndpointReference endpoint) {
+        this.operation = operation;
+        this.endpoint = endpoint;
+        this.mapper = new ObjectMapper();
+    }
+
+    public Message invoke(Message msg) {
+        try {
+
+            return doInvoke(msg);
+            
+        } catch (Exception e) {
+            throw new RuntimeException(e);
+        }
+    }
+
+    public Message doInvoke(Message msg) throws JsonGenerationException, JsonMappingException, IOException, EncoderException {
+        String uri = endpoint.getBinding().getURI() + "/" + operation.getName();
+        String[] jsonArgs = objectsToJSON((Object[])msg.getBody());
+
+        String responseJSON = invokeHTTPRequest(uri, jsonArgs);
+
+        Object response = jsonToObjects(responseJSON)[0];
+        msg.setBody(response);
+
+        return msg;
+    }
+
+    protected String invokeHTTPRequest(String url, String[] jsonArgs) throws IOException, EncoderException {
+        
+         HttpClient httpclient = new DefaultHttpClient();
+         
+         
+         URLCodec uc = new URLCodec();
+         for (int i=0 ; i<jsonArgs.length; i++) {
+             if (i == 0) {
+                 url += '?';
+             } else {
+                 url += '&';
+             }
+             url += "arg" + i + "=";
+             url += uc.encode(jsonArgs[i]);
+         }
+
+         HttpGet httpget = new HttpGet(url); 
+
+         HttpResponse response = httpclient.execute(httpget);
+         
+         StringBuffer responseJSON = new StringBuffer(); 
+
+         HttpEntity entity = response.getEntity();
+         
+         // If the response does not enclose an entity, there is no need
+         // to worry about connection release
+         if (entity != null) {
+             InputStream instream = entity.getContent();
+             try {
+                 
+                 BufferedReader reader = new BufferedReader(new InputStreamReader(instream));
+                 String s = null;
+                 while ((s = reader.readLine()) != null) {
+                     responseJSON.append(s);
+                 }
+                 
+             } catch (IOException ex) {
+         
+                 // In case of an IOException the connection will be released
+                 // back to the connection manager automatically
+                 throw ex;
+                 
+             } catch (RuntimeException ex) {
+         
+                 // In case of an unexpected exception you may want to abort
+                 // the HTTP request in order to shut down the underlying 
+                 // connection and release it back to the connection manager.
+                 httpget.abort();
+                 throw ex;
+                 
+             } finally {
+         
+                 // Closing the input stream will trigger connection release
+                 instream.close();
+                 
+             }
+             
+             // When HttpClient instance is no longer needed, 
+             // shut down the connection manager to ensure
+             // immediate deallocation of all system resources
+             httpclient.getConnectionManager().shutdown();        
+         }
+         
+         return responseJSON.toString();
+    }
+
+    protected String[] objectsToJSON(Object[] msgArgs) throws JsonGenerationException, JsonMappingException, IOException {
+        String[] jsonArgs = new String[msgArgs.length];
+        for (int i=0; i<msgArgs.length; i++) {
+            ByteArrayOutputStream os = new ByteArrayOutputStream();
+            mapper.writeValue(os , msgArgs[i]);
+            jsonArgs[i] = os.toString();
+        }
+        return jsonArgs;
+    }
+
+    protected Object[] jsonToObjects(String jsonRequest) throws JsonParseException, JsonMappingException, IOException {
+        Class<?> c = new Object[0].getClass();
+        Object[] args = (Object[])mapper.readValue("[" + jsonRequest +"]", c);
+        return args;
+    }
+    
+}
diff --git a/sca-java-2.x/contrib/modules/binding-comet-runtime/src/main/java/org/apache/tuscany/sca/binding/comet/runtime/CometReferenceBindingProvider.java b/sca-java-2.x/contrib/modules/binding-comet-runtime/src/main/java/org/apache/tuscany/sca/binding/comet/runtime/CometReferenceBindingProvider.java
new file mode 100644
index 0000000000..c7b96338b3
--- /dev/null
+++ b/sca-java-2.x/contrib/modules/binding-comet-runtime/src/main/java/org/apache/tuscany/sca/binding/comet/runtime/CometReferenceBindingProvider.java
@@ -0,0 +1,54 @@
+/*
+ * 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.comet.runtime;
+
+import org.apache.tuscany.sca.assembly.EndpointReference;
+import org.apache.tuscany.sca.interfacedef.InterfaceContract;
+import org.apache.tuscany.sca.interfacedef.Operation;
+import org.apache.tuscany.sca.invocation.Invoker;
+import org.apache.tuscany.sca.provider.ReferenceBindingProvider;
+
+// TODO
+public class CometReferenceBindingProvider implements ReferenceBindingProvider {
+
+    private EndpointReference endpoint;
+
+    public CometReferenceBindingProvider(EndpointReference endpoint) {
+        this.endpoint = endpoint;
+    }
+    public Invoker createInvoker(Operation operation) {
+        return new CometInvoker(operation, endpoint);
+    }
+
+    public void start() {
+    }
+
+    public void stop() {
+    }
+
+    public InterfaceContract getBindingInterfaceContract() {
+        return null;
+    }
+
+    public boolean supportsOneWayInvocation() {
+        return false;
+    }
+
+}
diff --git a/sca-java-2.x/contrib/modules/binding-comet-runtime/src/main/java/org/apache/tuscany/sca/binding/comet/runtime/CometServiceBindingProvider.java b/sca-java-2.x/contrib/modules/binding-comet-runtime/src/main/java/org/apache/tuscany/sca/binding/comet/runtime/CometServiceBindingProvider.java
new file mode 100644
index 0000000000..b4f45240bc
--- /dev/null
+++ b/sca-java-2.x/contrib/modules/binding-comet-runtime/src/main/java/org/apache/tuscany/sca/binding/comet/runtime/CometServiceBindingProvider.java
@@ -0,0 +1,69 @@
+/*
+ * 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.comet.runtime;
+
+import org.apache.tuscany.sca.assembly.ComponentService;
+import org.apache.tuscany.sca.host.http.ServletHost;
+import org.apache.tuscany.sca.interfacedef.Interface;
+import org.apache.tuscany.sca.interfacedef.InterfaceContract;
+import org.apache.tuscany.sca.interfacedef.Operation;
+import org.apache.tuscany.sca.provider.ServiceBindingProvider;
+import org.apache.tuscany.sca.runtime.RuntimeEndpoint;
+
+// TODO
+public class CometServiceBindingProvider implements ServiceBindingProvider {
+
+    private RuntimeEndpoint endpoint;
+    private ServletHost servletHost;
+
+    public CometServiceBindingProvider(RuntimeEndpoint endpoint, ServletHost servletHost) {
+        this.endpoint = endpoint;
+        this.servletHost = servletHost;
+    }
+
+    public void start() {
+        ComponentService service = endpoint.getService();
+        Interface serviceInterface = service.getInterfaceContract().getInterface();
+        for (Operation op : serviceInterface.getOperations()) {
+            CometServlet servlet = new CometServlet(endpoint, op);
+            String path = endpoint.getBinding().getURI() + "/" + op.getName();
+            servletHost.addServletMapping(path, servlet);
+        }
+    }
+
+    public void stop() {
+        ComponentService service = endpoint.getService();
+        Interface serviceInterface = service.getInterfaceContract().getInterface();
+        for (Operation op : serviceInterface.getOperations()) {
+            String path = endpoint.getBinding().getURI() + "/" + op.getName();
+            servletHost.removeServletMapping(path);
+        }
+    }
+
+    // TODO: Why are these two still on the ServiceBindingProvider interface?
+    public InterfaceContract getBindingInterfaceContract() {
+        return null;
+    }
+
+    public boolean supportsOneWayInvocation() {
+        return true;
+    }
+
+}
diff --git a/sca-java-2.x/contrib/modules/binding-comet-runtime/src/main/java/org/apache/tuscany/sca/binding/comet/runtime/CometServlet.java b/sca-java-2.x/contrib/modules/binding-comet-runtime/src/main/java/org/apache/tuscany/sca/binding/comet/runtime/CometServlet.java
new file mode 100644
index 0000000000..a1d685ac9b
--- /dev/null
+++ b/sca-java-2.x/contrib/modules/binding-comet-runtime/src/main/java/org/apache/tuscany/sca/binding/comet/runtime/CometServlet.java
@@ -0,0 +1,163 @@
+/*
+ * 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.comet.runtime;
+
+import java.io.ByteArrayOutputStream;
+import java.io.IOException;
+import java.lang.reflect.InvocationTargetException;
+import java.util.Comparator;
+import java.util.List;
+import java.util.Set;
+import java.util.SortedSet;
+import java.util.TreeSet;
+
+import javax.servlet.GenericServlet;
+import javax.servlet.ServletException;
+import javax.servlet.ServletRequest;
+import javax.servlet.ServletResponse;
+import javax.servlet.http.HttpServletRequest;
+
+import org.apache.tuscany.sca.interfacedef.DataType;
+import org.apache.tuscany.sca.interfacedef.Operation;
+import org.apache.tuscany.sca.runtime.RuntimeEndpoint;
+import org.codehaus.jackson.JsonParseException;
+import org.codehaus.jackson.map.JsonMappingException;
+import org.codehaus.jackson.map.ObjectMapper;
+
+// TODO
+public class CometServlet extends GenericServlet {
+    private static final long serialVersionUID = 1L;
+
+    protected transient RuntimeEndpoint wire;
+    protected transient Operation operation;
+    protected transient ObjectMapper mapper;
+    
+    public CometServlet(RuntimeEndpoint wire, Operation operation) {
+        this.wire = wire;
+        this.operation = operation;
+        this.mapper = new ObjectMapper();
+    }
+
+    @Override
+    public void service(ServletRequest servletRequest, ServletResponse servletResponse) throws ServletException, IOException {
+        String jsonRequest = getJSONRequest(servletRequest);
+        Object[] args = jsonToObjects(jsonRequest);
+        Object response = invokeService(args);        
+        String jsonResponse = getJSONResponse(servletRequest, response);
+        servletResponse.getOutputStream().println(jsonResponse);
+    }
+
+    /**
+     * Turn the request into JSON 
+     */
+    protected String getJSONRequest(ServletRequest servletRequest) throws IOException, JsonParseException, JsonMappingException {
+        
+        List<DataType> types = operation.getInputType().getLogical();
+        int typesIndex = 0;
+        
+        String jsonRequest = "";
+        for (String name : getOrderedParameterNames(servletRequest)) {
+            if (!name.startsWith("_") && !"callback".equals(name)) {
+                if (jsonRequest.length() > 1) {
+                    jsonRequest += ", ";
+                }
+
+                // automatically quote string parammeters so clients work in the usual javascript way
+                if (typesIndex < types.size() && String.class.equals(types.get(typesIndex).getGenericType())) {
+                    String x = servletRequest.getParameter(name);
+                    // TODO: do this more properly
+                    if (!x.startsWith("\"")) {
+                        jsonRequest += "\"" + x + "\"";
+                    } else {
+                        jsonRequest += x;
+                    }
+                } else {
+                    jsonRequest += servletRequest.getParameter(name);
+                }
+                
+            }
+        }
+
+        return "[" + jsonRequest + "]";
+    }
+
+    /**
+     * Get the request parameter names in the correct order.
+     * The request args need to be in the correct order to invoke the service so work out the
+     * order from the order in the query string. Eg, the url:
+     *   http://localhost:8085/HelloWorldService/sayHello2?first=petra&last=arnold&callback=foo"
+     * should invoke:
+     *   sayHello2("petra", "arnold")
+     * so the parameter names should be ordered: "first", "last"
+     */
+    protected SortedSet<String> getOrderedParameterNames(ServletRequest servletRequest) {
+        final String queryString = ((HttpServletRequest)servletRequest).getQueryString();
+
+        SortedSet<String> sortedNames = new TreeSet<String>(new Comparator<String>(){
+            public int compare(String o1, String o2) {
+                int i = queryString.indexOf(o1);
+                int j = queryString.indexOf(o2);
+                return i - j;
+            }});
+
+        Set<String> parameterNames = servletRequest.getParameterMap().keySet();
+        for (String name : parameterNames) {
+            sortedNames.add(name);    
+        }
+
+        return sortedNames;
+    }
+
+    /**
+     * Turn the response object into JSON 
+     */
+    protected String getJSONResponse(ServletRequest servletRequest, Object response) throws IOException, JsonParseException {
+        ByteArrayOutputStream os = new ByteArrayOutputStream();
+        mapper.writeValue(os , response);
+        String jsonResponse = os.toString();
+
+        String callback = servletRequest.getParameter("callback");
+        if (callback != null && callback.length() > 1) {
+            jsonResponse = callback + "(" + jsonResponse + ");";
+        }
+
+        return jsonResponse;
+    }
+
+    /**
+     * Turn the request JSON into objects 
+     */
+    protected Object[] jsonToObjects(String jsonRequest) throws IOException, JsonParseException, JsonMappingException {
+        Class<?> c = new Object[0].getClass();
+        Object[] args = (Object[])mapper.readValue(jsonRequest, c);
+        return args;
+    }
+
+    /**
+     * Send the request down the wire to invoke the service 
+     */
+    protected Object invokeService(Object[] args) {
+        try {
+            return wire.invoke(operation, args);
+        } catch (InvocationTargetException e) {
+            throw new RuntimeException(e);
+        }
+    }
+}
\ No newline at end of file
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