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.alibaba.jstorm.transactional;
  
  import java.util.ArrayList;
  import java.util.List;
  
  public class PendingBatch {
      public List<byte[]> tuples = new ArrayList<>();
      protected final Object lock = new Object();
      protected volatile boolean isActive = true;
  
      public PendingBatch(long batchId) {
      }
  
      public void addTuples(byte[] data) {
          synchronized (lock) {
              tuples.add(data);
          }
      }
  
      public List<byte[]> getTuples() {
          List<byte[]> ret;
          synchronized (lock) {
              isActive = false;
              ret = tuples;
              tuples = null;
          }
          return ret;
      }
  
      public void removeTuples() {
          synchronized (lock) {
              tuples = null;
              isActive = false;
          }
      }
  
      public boolean isEmpty() {
          return !isActive && (tuples == null || tuples.size() == 0);
      }
  
      @Override
      public String toString() {
          return "isActive: " + isActive + ", Pending tuple size:" + (tuples != null ? tuples.size() : 0);
      }
  }