/*

  * 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.giraph.block_app.library.gc;

 import org.apache.giraph.block_app.framework.api.BlockWorkerContextSendApi;

 import org.apache.giraph.block_app.framework.piece.PieceWithWorkerContext;

 import org.apache.giraph.types.NoMessage;

 import org.apache.hadoop.io.Writable;

 import org.apache.hadoop.io.WritableComparable;

 import edu.umd.cs.findbugs.annotations.SuppressFBWarnings;

 /**

  * Dummy piece to hint System.gc()

  */

 public class WorkerGCPiece extends PieceWithWorkerContext<WritableComparable,

     Writable, Writable, NoMessage, Object, NoMessage, Object>  {

   @Override

   @SuppressFBWarnings(value = "DM_GC")

   public void workerContextSend(

       BlockWorkerContextSendApi<WritableComparable, NoMessage> workerContextApi,

       Object executionStage,

       Object workerValue) {

     System.gc();

   }

 }