spark/memory/TestMemoryConsumer.java

0001 /*
0002  * Licensed to the Apache Software Foundation (ASF) under one or more
0003  * contributor license agreements.  See the NOTICE file distributed with
0004  * this work for additional information regarding copyright ownership.
0005  * The ASF licenses this file to You under the Apache License, Version 2.0
0006  * (the "License"); you may not use this file except in compliance with
0007  * the License.  You may obtain a copy of the License at
0008  *
0009  *    http://www.apache.org/licenses/LICENSE-2.0
0010  *
0011  * Unless required by applicable law or agreed to in writing, software
0012  * distributed under the License is distributed on an "AS IS" BASIS,
0013  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
0014  * See the License for the specific language governing permissions and
0015  * limitations under the License.
0016  */
0017
0018 package org.apache.spark.memory;
0019
0020 import com.google.common.annotations.VisibleForTesting;
0021
0022 import org.apache.spark.unsafe.memory.MemoryBlock;
0023
0024 import java.io.IOException;
0025
0026 public class TestMemoryConsumer extends MemoryConsumer {
0027   public TestMemoryConsumer(TaskMemoryManager memoryManager, MemoryMode mode) {
0028     super(memoryManager, 1024L, mode);
0029   }
0030   public TestMemoryConsumer(TaskMemoryManager memoryManager) {
0031     this(memoryManager, MemoryMode.ON_HEAP);
0032   }
0033
0034   @Override
0035   public long spill(long size, MemoryConsumer trigger) throws IOException {
0036     long used = getUsed();
0037     free(used);
0038     return used;
0039   }
0040
0041   public void use(long size) {
0042     long got = taskMemoryManager.acquireExecutionMemory(size, this);
0043     used += got;
0044   }
0045
0046   public void free(long size) {
0047     used -= size;
0048     taskMemoryManager.releaseExecutionMemory(size, this);
0049   }
0050
0051   @VisibleForTesting
0052   public void freePage(MemoryBlock page) {
0053     used -= page.size();
0054     taskMemoryManager.freePage(page, this);
0055   }
0056 }
0057
0058