org.openqa.grid.web.servlet.Grid1HeartbeatServlet Maven / Gradle / Ivy

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/*
Copyright 2011 WebDriver committers
Copyright 2011 Software Freedom Conservancy

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.openqa.grid.web.servlet;

import org.openqa.grid.internal.Registry;
import org.openqa.grid.internal.RemoteProxy;

import java.io.IOException;
import java.util.Map;

import javax.servlet.ServletException;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

/**
 * Provided for compatibility with Selenium Grid 1.0 clients. Responds to heartbeat requests and
 * indicates whether or not a node is registered with the hub.
 */
public class Grid1HeartbeatServlet extends RegistryBasedServlet {
  private static final long serialVersionUID = 7653463271803124556L;

  public Grid1HeartbeatServlet() {
    this(null);
  }

  public Grid1HeartbeatServlet(Registry registry) {
    super(registry);
  }

  @Override
  protected void doGet(HttpServletRequest request, HttpServletResponse response)
      throws ServletException, IOException {
    response.setContentType("text/html");
    response.setCharacterEncoding("UTF-8");
    response.setStatus(200);

    // Build up the proxy URL based upon the params the Grid 1.0 node will pass as query params.
    Map queryParams = request.getParameterMap();
    String nodeUrl =
        String.format("http://%s:%s", queryParams.get("host")[0],
            queryParams.get("port")[0]);

    // Check each registered node and see if the pinging node is in the list.
    boolean alreadyRegistered = false;
    for (RemoteProxy proxy : getRegistry().getAllProxies()) {
      if (proxy.getRemoteHost().toString().equals(nodeUrl)) {
        alreadyRegistered = true;
      }
    }

    if (alreadyRegistered) {
      response.getWriter().print("Hub : OK");
    } else {
      response.getWriter().print("Hub : Not Registered");
    }
  }
}