azkaban.webapp.servlet.StatusServlet.java Source code

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Here is the source code for azkaban.webapp.servlet.StatusServlet.java

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/*
 * Copyright 2017 LinkedIn Corp.
 *
 * 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 azkaban.webapp.servlet;

import static azkaban.webapp.servlet.AbstractAzkabanServlet.JSON_MIME_TYPE;

import azkaban.webapp.StatusService;
import com.google.gson.GsonBuilder;
import java.io.IOException;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

public class StatusServlet extends HttpServlet {

    private static final Logger log = LoggerFactory.getLogger(StatusServlet.class);

    private final StatusService statusService;

    public StatusServlet(final StatusService statusService) {
        this.statusService = statusService;
    }

    @Override
    protected void doGet(final HttpServletRequest req, final HttpServletResponse resp)
            throws ServletException, IOException {
        try {
            resp.setContentType(JSON_MIME_TYPE);
            resp.getOutputStream()
                    .println(new GsonBuilder().setPrettyPrinting().create().toJson(this.statusService.getStatus()));
            resp.setStatus(HttpServletResponse.SC_OK);
        } catch (final Exception e) {
            log.error("Error!! while reporting status: ", e);
            resp.sendError(HttpServletResponse.SC_INTERNAL_SERVER_ERROR, e.getMessage());
        } finally {
            resp.getOutputStream().close();
        }
    }
}