VersionServlet.java example

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/**
 * Copyright (c) 2010 Yahoo! Inc. All rights reserved.
 * 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. See accompanying LICENSE file.
 */
package org.apache.oozie.servlet;

import org.apache.oozie.client.OozieClient;
import org.apache.oozie.servlet.JsonRestServlet;
import org.json.simple.JSONArray;

import javax.servlet.ServletException;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;
import java.util.Arrays;
import java.util.Collections;

public class VersionServlet extends JsonRestServlet {
    private static final String INSTRUMENTATION_NAME = "version";

    private static final ResourceInfo RESOURCE_INFO =
            new ResourceInfo("", Arrays.asList("GET"), Collections.EMPTY_LIST);

    // private static JSONArray versions = new JSONArray();

    public VersionServlet() {
        super(INSTRUMENTATION_NAME, RESOURCE_INFO);
        // versions.add(OozieClient.WS_PROTOCOL_VERSION_0);
        // versions.add(OozieClient.WS_PROTOCOL_VERSION);
    }

    protected void doGet(HttpServletRequest request, HttpServletResponse response)
            throws ServletException, IOException {
        JSONArray versions = new JSONArray();
        versions.add(OozieClient.WS_PROTOCOL_VERSION_0);
        versions.add(OozieClient.WS_PROTOCOL_VERSION);
        sendJsonResponse(response, HttpServletResponse.SC_OK, versions);
    }
}