1 /*
2 * Licensed to the Apache Software Foundation (ASF) under one
3 * or more contributor license agreements. See the NOTICE file
4 * distributed with this work for additional information
5 * regarding copyright ownership. The ASF licenses this file
6 * to you under the Apache License, Version 2.0 (the
7 * "License"); you may not use this file except in compliance
8 * with the License. You may obtain a copy of the License at
9 *
10 * http://www.apache.org/licenses/LICENSE-2.0
11 *
12 * Unless required by applicable law or agreed to in writing, software
13 * distributed under the License is distributed on an "AS IS" BASIS,
14 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
15 * See the License for the specific language governing permissions and
16 * limitations under the License.
17 */
18 package org.apache.giraph.block_app.library.gc;
19
20 import org.apache.giraph.block_app.framework.api.BlockWorkerContextSendApi;
21 import org.apache.giraph.block_app.framework.piece.PieceWithWorkerContext;
22 import org.apache.giraph.types.NoMessage;
23 import org.apache.hadoop.io.Writable;
24 import org.apache.hadoop.io.WritableComparable;
25
26 import edu.umd.cs.findbugs.annotations.SuppressFBWarnings;
27
28 /**
29 * Dummy piece to hint System.gc()
30 */
31 public class WorkerGCPiece extends PieceWithWorkerContext<WritableComparable,
32 Writable, Writable, NoMessage, Object, NoMessage, Object> {
33
34 @Override
35 @SuppressFBWarnings(value = "DM_GC")
36 public void workerContextSend(
37 BlockWorkerContextSendApi<WritableComparable, NoMessage> workerContextApi,
38 Object executionStage,
39 Object workerValue) {
40 System.gc();
41 }
42 }