Added new simple RPC example to supplement the DynaTable example.
Reviewed by: mmendez
git-svn-id: https://google-web-toolkit.googlecode.com/svn/trunk@558 8db76d5a-ed1c-0410-87a9-c151d255dfc7
diff --git a/samples/simplerpc/build.xml b/samples/simplerpc/build.xml
new file mode 100644
index 0000000..1a2cd86
--- /dev/null
+++ b/samples/simplerpc/build.xml
@@ -0,0 +1,5 @@
+<project name="dynatable" default="build" basedir=".">
+ <property name="sample.root" value="simplercp" />
+ <property name="sample.module" value="SimpleRPC" />
+ <import file="../common.ant.xml" />
+</project>
diff --git a/samples/simplerpc/src/com/google/gwt/sample/simplerpc/COPYING b/samples/simplerpc/src/com/google/gwt/sample/simplerpc/COPYING
new file mode 100644
index 0000000..d9a10c0
--- /dev/null
+++ b/samples/simplerpc/src/com/google/gwt/sample/simplerpc/COPYING
@@ -0,0 +1,176 @@
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+
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diff --git a/samples/simplerpc/src/com/google/gwt/sample/simplerpc/SimpleRPC.gwt.xml b/samples/simplerpc/src/com/google/gwt/sample/simplerpc/SimpleRPC.gwt.xml
new file mode 100644
index 0000000..03c3b1e
--- /dev/null
+++ b/samples/simplerpc/src/com/google/gwt/sample/simplerpc/SimpleRPC.gwt.xml
@@ -0,0 +1,6 @@
+<module>
+ <inherits name='com.google.gwt.user.User'/>
+ <entry-point class='com.google.gwt.sample.simplerpc.client.SimpleRPC'/>
+ <servlet path='/simpleRPC' class='com.google.gwt.sample.simplerpc.server.SimpleRPCServiceImpl'/>
+</module>
+
diff --git a/samples/simplerpc/src/com/google/gwt/sample/simplerpc/client/SimpleRPC.java b/samples/simplerpc/src/com/google/gwt/sample/simplerpc/client/SimpleRPC.java
new file mode 100644
index 0000000..74ad5d8
--- /dev/null
+++ b/samples/simplerpc/src/com/google/gwt/sample/simplerpc/client/SimpleRPC.java
@@ -0,0 +1,167 @@
+/*
+ * Copyright 2006 Google Inc.
+ *
+ * Licensed 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 com.google.gwt.sample.simplerpc.client;
+
+import com.google.gwt.core.client.EntryPoint;
+import com.google.gwt.core.client.GWT;
+import com.google.gwt.user.client.Window;
+import com.google.gwt.user.client.rpc.AsyncCallback;
+import com.google.gwt.user.client.rpc.ServiceDefTarget;
+import com.google.gwt.user.client.ui.FlexTable;
+import com.google.gwt.user.client.ui.HTML;
+import com.google.gwt.user.client.ui.Panel;
+import com.google.gwt.user.client.ui.RootPanel;
+
+import java.util.ArrayList;
+import java.util.Iterator;
+import java.util.List;
+import java.util.Map;
+import java.util.Map.Entry;
+
+/**
+ * Demonstrates a simple use of the RPC mechanism.
+ */
+public class SimpleRPC implements EntryPoint {
+
+ public void onModuleLoad() {
+ final Panel root = RootPanel.get();
+
+ // Create the RPC client.
+ SimpleRPCServiceAsync simpleRPCService = createSimpleRPCServiceAsync();
+
+ // Collection of very simple RPC calls to "getString".
+ callGetString(root, simpleRPCService);
+
+ // A single simple call to "getMultipleStrings".
+ callGetMultipleStrings(root, simpleRPCService);
+ }
+
+ /**
+ * Creates a single call to <code>getMultipleStrings</code>. The
+ * <code>getMultipleStrings</code> methods uses gwt.typeArgs to specify the type
+ * of its map.
+ */
+ private void callGetMultipleStrings(final Panel root,
+ SimpleRPCServiceAsync simpleRPCService) {
+ AsyncCallback getMultipleStringsCallback = createGetMultipleStringsCallback(root);
+
+ // Should print a table of key value pairs.
+ List indexes = new ArrayList();
+ indexes.add(new Integer(0));
+ indexes.add(new Integer(2));
+ simpleRPCService.getMultipleStrings(indexes, getMultipleStringsCallback);
+ }
+
+ /**
+ * Calls <code>getString</code> three times, the first two should return
+ * valid answers, the third should give back an error. <p/> Control flow will
+ * continue after making each call. Later the 'callback' onSuccess or
+ * onFailure method will be invoked when the RPC completes. There is no order
+ * guarantee here, the three results could appear on the page in any order.
+ */
+ private void callGetString(final Panel root,
+ SimpleRPCServiceAsync simpleRPCService) {
+ // Create a callback to use.
+ AsyncCallback singleGetStringCallback = createGetStringCallback(root);
+
+ // Should print 'Hello World'.
+ simpleRPCService.getString(0, singleGetStringCallback);
+
+ // Should print 'Bonjour monde'.
+ simpleRPCService.getString(1, singleGetStringCallback);
+
+ // Should print an IndexOutOfBoundsException.
+ simpleRPCService.getString(3, singleGetStringCallback);
+ }
+
+ /**
+ * Create an asynchronous callback for the <code>getMultipleStrings</code>
+ * RPC call. The same callback can be used for many RPC calls or customized
+ * for a single one.
+ */
+ private AsyncCallback createGetMultipleStringsCallback(final Panel root) {
+ return new AsyncCallback() {
+
+ public void onFailure(Throwable caught) {
+ Window.alert("error: " + caught);
+ }
+
+ public void onSuccess(Object result) {
+ Map m = (Map) result;
+ FlexTable t = new FlexTable();
+ t.setBorderWidth(2);
+ t.setHTML(0, 0, "<b>Map Key</b>");
+ t.setHTML(0, 1, "<b>Map Value</b>");
+ int index = 1;
+ Iterator iter = m.entrySet().iterator();
+ while (iter.hasNext()) {
+ Entry element = (Entry) iter.next();
+ Integer key = (Integer) element.getKey();
+ String value = (String) element.getValue();
+ t.setText(index, 0, key.toString());
+ t.setText(index, 1, value);
+ ++index;
+ }
+ root.add(new HTML("<h3>Result(on success)</h3>"));
+ root.add(t);
+ }
+ };
+ }
+
+ /**
+ * Create an asynchronous callback for the <code>getString</code> RPC call.
+ * The same callback can be used for many RPC calls or customized for a single
+ * one.
+ */
+ private AsyncCallback createGetStringCallback(final Panel root) {
+ return new AsyncCallback() {
+ public void onFailure(Throwable caught) {
+ root.add(new HTML("<h3>Result (on failure) </h3>"));
+ root.add(new HTML("<i>" + caught.getMessage() + "</i>"));
+ }
+
+ public void onSuccess(Object result) {
+ root.add(new HTML("<h3>Result (on success) </h3>" + result));
+ }
+ };
+ }
+
+ /**
+ * Returns an configured instance of the <code>SimpleRPCService</code>
+ * client proxy. <p/> Note that although you are creating the service
+ * interface proper, you cast the result to the asynchronous version of the
+ * interface. The cast is always safe because the generated proxy implements
+ * the asynchronous interface automatically.
+ */
+ private SimpleRPCServiceAsync createSimpleRPCServiceAsync() {
+ SimpleRPCServiceAsync simpleRPCService = (SimpleRPCServiceAsync) GWT.create(SimpleRPCService.class);
+ setServiceURL(simpleRPCService);
+ return simpleRPCService;
+ }
+
+ /**
+ * Sets the URL where our service implementation is running.
+ * <p>
+ * Note that due to the same origin security policy enforced by the browser
+ * implementations the target URL must reside on the same domain, port and
+ * protocol from which the host page was served.
+ */
+ private void setServiceURL(SimpleRPCServiceAsync simpleRPCService) {
+ ServiceDefTarget endpoint = (ServiceDefTarget) simpleRPCService;
+ String moduleRelativeURL = GWT.getModuleBaseURL() + "simpleRPC";
+ endpoint.setServiceEntryPoint(moduleRelativeURL);
+ }
+}
diff --git a/samples/simplerpc/src/com/google/gwt/sample/simplerpc/client/SimpleRPCException.java b/samples/simplerpc/src/com/google/gwt/sample/simplerpc/client/SimpleRPCException.java
new file mode 100644
index 0000000..59cddfe
--- /dev/null
+++ b/samples/simplerpc/src/com/google/gwt/sample/simplerpc/client/SimpleRPCException.java
@@ -0,0 +1,39 @@
+/*
+ * Copyright 2006 Google Inc.
+ *
+ * Licensed 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 com.google.gwt.sample.simplerpc.client;
+
+import com.google.gwt.user.client.rpc.SerializableException;
+
+/**
+ * Simple RPC exception.
+ */
+public class SimpleRPCException extends SerializableException {
+
+ /**
+ * Constructor for <code>SimpleRPCException</code>. Needed to support serialization.
+ */
+ public SimpleRPCException() {
+ }
+
+ /**
+ * Constructor for <code>SimpleRPCException</code>.
+ * @param message message for the <code>SimplePRCException</code>
+ */
+ public SimpleRPCException(String message) {
+ super(message);
+ }
+}
diff --git a/samples/simplerpc/src/com/google/gwt/sample/simplerpc/client/SimpleRPCService.java b/samples/simplerpc/src/com/google/gwt/sample/simplerpc/client/SimpleRPCService.java
new file mode 100644
index 0000000..fe06680
--- /dev/null
+++ b/samples/simplerpc/src/com/google/gwt/sample/simplerpc/client/SimpleRPCService.java
@@ -0,0 +1,53 @@
+/*
+ * Copyright 2006 Google Inc.
+ *
+ * Licensed 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 com.google.gwt.sample.simplerpc.client;
+
+import com.google.gwt.user.client.rpc.RemoteService;
+
+import java.util.List;
+import java.util.Map;
+
+/**
+ * The sample service.
+ */
+public interface SimpleRPCService extends RemoteService {
+ /**
+ * Returns a string from the server associated with the given index.
+ *
+ * @param index index of string
+ * @return the string associated with the given index
+ * @throws SimpleRPCException
+ */
+ String getString(int index) throws SimpleRPCException;
+
+ /**
+ * Given a list of indexes, returns a map of indexes --> string values. Uses
+ * gwt.typeArgs to specify the type of both the requested list and returned
+ * map.
+ * <p>
+ * Note that if the gwt.typeArgs annotation were not included the RPC system
+ * may not be able to determine the types being returned and therefore runtime
+ * errors may result.
+ * </p>
+ *
+ * @gwt.typeArgs indexes <java.lang.Integer>
+ * @gwt.typeArgs <java.lang.String>
+ *
+ * @param indexes indexes to be mapped
+ * @return map of indexes --> string values
+ */
+ Map getMultipleStrings(List indexes) throws SimpleRPCException;
+}
diff --git a/samples/simplerpc/src/com/google/gwt/sample/simplerpc/client/SimpleRPCServiceAsync.java b/samples/simplerpc/src/com/google/gwt/sample/simplerpc/client/SimpleRPCServiceAsync.java
new file mode 100644
index 0000000..3b2ca92
--- /dev/null
+++ b/samples/simplerpc/src/com/google/gwt/sample/simplerpc/client/SimpleRPCServiceAsync.java
@@ -0,0 +1,36 @@
+/*
+ * Copyright 2006 Google Inc.
+ *
+ * Licensed 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 com.google.gwt.sample.simplerpc.client;
+
+import com.google.gwt.user.client.rpc.AsyncCallback;
+
+import java.util.List;
+
+/**
+ * Async class associated with SimpleRPCService.
+ */
+public interface SimpleRPCServiceAsync {
+
+ /**
+ * Async version of <code>getString</code>.
+ */
+ void getString(int index, AsyncCallback callback);
+
+ /**
+ * Async version of <code>getMultipleStrings</code>.
+ */
+ void getMultipleStrings(List indexes, AsyncCallback callback);
+}
diff --git a/samples/simplerpc/src/com/google/gwt/sample/simplerpc/public/SimpleRPC.css b/samples/simplerpc/src/com/google/gwt/sample/simplerpc/public/SimpleRPC.css
new file mode 100644
index 0000000..76b3a37
--- /dev/null
+++ b/samples/simplerpc/src/com/google/gwt/sample/simplerpc/public/SimpleRPC.css
@@ -0,0 +1,16 @@
+body {
+ background-color: white;
+ color: black;
+ font-family: Arial, sans-serif;
+ font-size: small;
+ margin: 8px;
+ margin-top: 3px;
+}
+
+h1 {
+ color: blue;
+}
+
+h3 {
+ color: green;
+}
\ No newline at end of file
diff --git a/samples/simplerpc/src/com/google/gwt/sample/simplerpc/public/SimpleRPC.html b/samples/simplerpc/src/com/google/gwt/sample/simplerpc/public/SimpleRPC.html
new file mode 100644
index 0000000..03e305f
--- /dev/null
+++ b/samples/simplerpc/src/com/google/gwt/sample/simplerpc/public/SimpleRPC.html
@@ -0,0 +1,19 @@
+<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
+ "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
+<html xmlns="http://www.w3.org/1999/xhtml">
+ <head>
+ <meta name='gwt:module'
+ content='com.google.gwt.sample.simplerpc.SimpleRPC' />
+ <link type="text/css" rel="stylesheet" href="SimpleRPC.css" />
+ <title>SimpleRPC</title>
+ </head>
+ <body>
+ <iframe id='__gwt_historyFrame' style='width:0;height:0;border:0'></iframe>
+ <script type="text/javascript" language='javascript' src='gwt.js'>
+ </script>
+ <h1>
+ Simple RPC
+ </h1>
+ Simple example of RPC, check out the DynaTable sample if you want to see real RPC coolness.
+ </body>
+</html>
diff --git a/samples/simplerpc/src/com/google/gwt/sample/simplerpc/server/SimpleRPCServiceImpl.java b/samples/simplerpc/src/com/google/gwt/sample/simplerpc/server/SimpleRPCServiceImpl.java
new file mode 100644
index 0000000..83d82ce
--- /dev/null
+++ b/samples/simplerpc/src/com/google/gwt/sample/simplerpc/server/SimpleRPCServiceImpl.java
@@ -0,0 +1,72 @@
+/*
+ * Copyright 2006 Google Inc.
+ *
+ * Licensed 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 com.google.gwt.sample.simplerpc.server;
+
+import com.google.gwt.sample.simplerpc.client.SimpleRPCException;
+import com.google.gwt.sample.simplerpc.client.SimpleRPCService;
+import com.google.gwt.user.server.rpc.RemoteServiceServlet;
+
+import java.util.HashMap;
+import java.util.List;
+import java.util.Map;
+
+/**
+ * The implementation of the <code>SimpleRPCService</code> code. This code
+ * only runs on the server.
+ */
+public class SimpleRPCServiceImpl extends RemoteServiceServlet implements
+ SimpleRPCService {
+
+ /**
+ * The server strings used to supply the information to <code>getString</code>.
+ */
+ private static final String[] SERVER_STRINGS = new String[] {
+ "Hello World", "Bonjour monde", "Hola Español"};
+
+ /**
+ * Gets a map of strings associated with the given indexes. The gwt.typeArgs
+ * on <code>SimpleRPCService</code> constrain the map to be of type
+ * <code>Integer,String</code> and the argument list to be of type
+ * <code> Integer</code>.
+ */
+ public Map getMultipleStrings(List indexes) throws SimpleRPCException {
+ Map accum = new HashMap();
+ for (int i = 0; i < indexes.size(); i++) {
+ Integer key = (Integer) indexes.get(i);
+ String value = getString(key.intValue());
+ accum.put(key, value);
+ }
+ return accum;
+ }
+
+ /**
+ * Gets a string associated with a given index. In a real world application,
+ * we would be consulting a database or some other server-side set of
+ * information. Here we are just accessing a server side array.
+ *
+ * @param index index of string
+ * @return the string associated with the given index
+ * @throws SimpleRPCException
+ */
+ public String getString(int index) throws SimpleRPCException {
+ try {
+ return SERVER_STRINGS[index];
+ } catch (RuntimeException e) {
+ throw new SimpleRPCException(e.getClass().getName() + ":"
+ + e.getMessage());
+ }
+ }
+}
