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 org.apache.asterix.translator;
  
  import org.apache.asterix.common.api.IClientRequest;
  import org.apache.asterix.common.api.IRequestReference;
  import org.apache.asterix.common.dataflow.ICcApplicationContext;
  import org.apache.asterix.om.base.ADateTime;
  import org.apache.hyracks.api.exceptions.HyracksDataException;
  import org.apache.hyracks.util.JSONUtil;
  
  import com.fasterxml.jackson.databind.node.ObjectNode;
  
  public abstract class BaseClientRequest implements IClientRequest {
  
      private boolean complete;
      private final IRequestReference requestReference;
      private boolean cancellable = false;
      private volatile long completionTime = -1;
      protected volatile State state = State.RECEIVED;
  
      public BaseClientRequest(IRequestReference requestReference) {
          this.requestReference = requestReference;
      }
  
      @Override
      public synchronized void complete() {
          if (complete) {
              return;
          }
          complete = true;
          state = State.COMPLETED;
          completionTime = System.currentTimeMillis();
      }
  
      @Override
      public synchronized void cancel(ICcApplicationContext appCtx) throws HyracksDataException {
          if (complete) {
              return;
          }
          if (cancellable) {
              complete();
              state = State.CANCELLED;
              doCancel(appCtx);
          }
      }
  
      @Override
      public synchronized void markCancellable() {
          cancellable = true;
      }
  
      @Override
      public synchronized boolean isCancelled() {
          return state == State.CANCELLED;
      }
  
      @Override
      public String getId() {
          // the uuid is generated by the node which received the request
          // so there is a chance this might not be unique now
          return requestReference.getUuid();
      }
  
      @Override
      public synchronized boolean isCancellable() {
          return cancellable;
      }
  
      public void setRunning() {
          state = State.RUNNING;
      }
  
      @Override
      public String toJson() {
          return JSONUtil.convertNodeUnchecked(asJson());
      }
  
      @Override
      public ObjectNode asJson() {
          return putJson();
      }
  
      @Override
      public ObjectNode asRedactedJson() {
          return putJson();
      }
  
      private ObjectNode putJson() {
          ObjectNode json = JSONUtil.createObject();
          json.put("uuid", requestReference.getUuid());
          json.put("requestTime", new ADateTime(requestReference.getTime()).toSimpleString());
          json.put("elapsedTime", getElapsedTimeInSecs());
          json.put("node", requestReference.getNode());
          json.put("state", state.getLabel());
          json.put("userAgent", requestReference.getUserAgent());
          json.put("remoteAddr", requestReference.getRemoteAddr());
          json.put("cancellable", cancellable);
          return json;
      }
  
      private double getElapsedTimeInSecs() {
          // this is just an estimation as the request might have been received on a node with a different system time
          long runningTime = completionTime > 0 ? completionTime : System.currentTimeMillis();
          return (runningTime - requestReference.getTime()) / 1000d;
      }
  
      protected abstract void doCancel(ICcApplicationContext appCtx) throws HyracksDataException;
  }
  