code: /*
   * 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.skywalking.oap.server.library.datacarrier.buffer;
  
  import java.util.List;
  import java.util.concurrent.ArrayBlockingQueue;
  
  /**
   * The buffer implementation based on JDK ArrayBlockingQueue.
   * <p>
   * This implementation has better performance in server side. We are still trying to research whether this is suitable
   * for agent side, which is more sensitive about blocks.
   */
  public class ArrayBlockingQueueBuffer<T> implements QueueBuffer<T> {
      private BufferStrategy strategy;
      private ArrayBlockingQueue<T> queue;
      private int bufferSize;
  
      ArrayBlockingQueueBuffer(int bufferSize, BufferStrategy strategy) {
          this.strategy = strategy;
          this.queue = new ArrayBlockingQueue<T>(bufferSize);
          this.bufferSize = bufferSize;
      }
  
      @Override
      public boolean save(T data) {
          //only BufferStrategy.BLOCKING
          try {
              queue.put(data);
          } catch (InterruptedException e) {
              // Ignore the error
              return false;
          }
          return true;
      }
  
      @Override
      public void setStrategy(BufferStrategy strategy) {
          this.strategy = strategy;
      }
  
      @Override
      public void obtain(List<T> consumeList) {
          queue.drainTo(consumeList);
      }
  
      @Override
      public int getBufferSize() {
          return bufferSize;
      }
  }
  