/
GreetingServlet.java
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/
GreetingServlet.java
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/**
* Copyright (C) 2009-2011 the original author or authors.
* See the notice.md file distributed with this work for additional
* information regarding copyright ownership.
*
* 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 org.fusesource.restygwt.examples.server;
import java.io.IOException;
import java.io.StringWriter;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import org.codehaus.jackson.JsonNode;
import org.codehaus.jackson.map.ObjectMapper;
import org.codehaus.jackson.node.JsonNodeFactory;
import org.codehaus.jackson.node.ObjectNode;
import org.fusesource.restygwt.client.Resource;
/**
* A simple server that serves JSON Data without constructing a Java Object.
*
* @author <a href="http://hiramchirino.com">Hiram Chirino</a>
*/
public class GreetingServlet extends HttpServlet {
private static final long serialVersionUID = -5364009274470240594L;
private static final String helloWorldJson = "{\"greeting\":\"Hello World\"}";
@Override
protected void doGet(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
System.out.println("Sending Hello World");
try {
ObjectMapper mapper = new ObjectMapper();
JsonNode helloJsonNode = mapper.readTree(helloWorldJson);
mapper.writeValue(resp.getOutputStream(), helloJsonNode);
} catch (Throwable e) {
e.printStackTrace();
} finally {
System.out.flush();
System.err.flush();
}
}
@Override
protected void doPost(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
System.out.println("Creating custom greeting.");
try {
ObjectMapper mapper = new ObjectMapper();
ObjectNode nameObject = mapper.readValue(req.getInputStream(), ObjectNode.class);
String name = nameObject.get("name").getTextValue();
String greeting = "Hello " + name;
ObjectNode resultObject = new ObjectNode(JsonNodeFactory.instance);
resultObject.put("greeting", greeting);
mapper.writeValue(resp.getOutputStream(), resultObject);
} catch (Throwable e) {
e.printStackTrace();
} finally {
System.out.flush();
System.err.flush();
}
}
}