content: /*
   * Licensed to the Apache Software Foundation (ASF) under one
   * or more contributor license agreements.  See the NOTICE file
   * distributed with this work for additional information
   * regarding copyright ownership.  The ASF licenses this file
   * to you 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 com.github.jobson.websockets.v1;
  
  import com.github.jobson.jobs.JobId;
  import com.github.jobson.jobs.JobManagerEvents;
  import org.eclipse.jetty.websocket.servlet.ServletUpgradeRequest;
  import org.eclipse.jetty.websocket.servlet.ServletUpgradeResponse;
  import org.eclipse.jetty.websocket.servlet.WebSocketCreator;
  
  import java.util.regex.Matcher;
  import java.util.regex.Pattern;
  
  import static com.github.jobson.Constants.WEBSOCKET_STDOUT_UPDATES_PATTERN;
  
  public final class StdoutUpdateSocketCreator implements WebSocketCreator {
  
  
      private static Pattern URI_PATTERN = Pattern.compile(WEBSOCKET_STDOUT_UPDATES_PATTERN);
  
  
      private static JobId extractJobId(String requestPath) {
          final Matcher pathMatcher = URI_PATTERN.matcher(requestPath);
          pathMatcher.find();
          return new JobId(pathMatcher.group(1));
      }
  
  
      private final JobManagerEvents jobManagerEvents;
  
  
      public StdoutUpdateSocketCreator(JobManagerEvents jobManagerEvents) {
          this.jobManagerEvents = jobManagerEvents;
      }
  
  
      @Override
      public Object createWebSocket(ServletUpgradeRequest servletUpgradeRequest, ServletUpgradeResponse servletUpgradeResponse) {
          return this.jobManagerEvents
                  .stdoutUpdates(extractJobId(servletUpgradeRequest.getRequestPath()))
                  .map(observable -> new ObservableByteArraySocket("stdout updates", observable))
                  .orElse(null);
      }
  }
  