001/**
002 * Licensed to the Apache Software Foundation (ASF) under one
003 * or more contributor license agreements.  See the NOTICE file
004 * distributed with this work for additional information
005 * regarding copyright ownership.  The ASF licenses this file
006 * to you under the Apache License, Version 2.0 (the
007 * "License"); you may not use this file except in compliance
008 * with the License.  You may obtain a copy of the License at
009 *
010 *      http://www.apache.org/licenses/LICENSE-2.0
011 *
012 * Unless required by applicable law or agreed to in writing, software
013 * distributed under the License is distributed on an "AS IS" BASIS,
014 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
015 * See the License for the specific language governing permissions and
016 * limitations under the License.
017 */
018
019package org.apache.oozie.servlet;
020
021import org.apache.oozie.client.OozieClient;
022import org.apache.oozie.servlet.JsonRestServlet;
023import org.json.simple.JSONArray;
024
025import javax.servlet.ServletException;
026import javax.servlet.http.HttpServletRequest;
027import javax.servlet.http.HttpServletResponse;
028import java.io.IOException;
029import java.util.Arrays;
030import java.util.Collections;
031
032public class VersionServlet extends JsonRestServlet {
033    private static final String INSTRUMENTATION_NAME = "version";
034
035    private static final ResourceInfo RESOURCE_INFO =
036            new ResourceInfo("", Arrays.asList("GET"), Collections.EMPTY_LIST);
037
038    // private static JSONArray versions = new JSONArray();
039
040    public VersionServlet() {
041        super(INSTRUMENTATION_NAME, RESOURCE_INFO);
042        // versions.add(OozieClient.WS_PROTOCOL_VERSION_0);
043        // versions.add(OozieClient.WS_PROTOCOL_VERSION);
044    }
045
046    protected void doGet(HttpServletRequest request, HttpServletResponse response)
047            throws ServletException, IOException {
048        JSONArray versions = new JSONArray();
049        versions.add(OozieClient.WS_PROTOCOL_VERSION_0);
050        versions.add(OozieClient.WS_PROTOCOL_VERSION_1);
051        versions.add(OozieClient.WS_PROTOCOL_VERSION);
052        sendJsonResponse(response, HttpServletResponse.SC_OK, versions);
053    }
054}