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
   * <p/>
   * http://www.apache.org/licenses/LICENSE-2.0
   * <p/>
   * 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.flink.streaming.siddhi.source;
  
  import org.apache.flink.api.java.tuple.Tuple4;
  import org.apache.flink.streaming.api.functions.source.SourceFunction;
  
  import java.util.Random;
  import java.util.concurrent.atomic.AtomicInteger;
  
  public class RandomTupleSource implements SourceFunction<Tuple4<Integer, String, Double, Long>> {
      private final int count;
      private final Random random;
      private final long initialTimestamp;
  
      private volatile boolean isRunning = true;
      private volatile AtomicInteger number = new AtomicInteger(0);
      private long closeDelayTimestamp;
  
      public RandomTupleSource(int count, long initialTimestamp) {
          this.count = count;
          this.random = new Random();
          this.initialTimestamp = initialTimestamp;
      }
  
      public RandomTupleSource() {
          this(Integer.MAX_VALUE, System.currentTimeMillis());
      }
  
      public RandomTupleSource(int count) {
          this(count, System.currentTimeMillis());
      }
  
  
      public RandomTupleSource closeDelay(long delayTimestamp) {
          this.closeDelayTimestamp = delayTimestamp;
          return this;
      }
  
      @Override
      public void run(SourceContext<Tuple4<Integer, String, Double, Long>> ctx) throws Exception {
          while (isRunning) {
              long timestamp = initialTimestamp + 1000 * number.get();
              ctx.collectWithTimestamp(Tuple4.of(number.get(), "test_tuple", random.nextDouble(), timestamp), timestamp);
              if (number.incrementAndGet() >= this.count) {
                  cancel();
              }
          }
      }
  
      @Override
      public void cancel() {
          this.isRunning = false;
          try {
              Thread.sleep(this.closeDelayTimestamp);
          } catch (InterruptedException e) {
              // ignored
          }
      }
  }
  