| /* |
| * 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.lucene.misc; |
| |
| import java.util.concurrent.atomic.AtomicLong; |
| |
| import org.apache.lucene.util.MemoryTracker; |
| |
| /** |
| * Default implementation of {@code MemoryTracker} that tracks |
| * allocations and allows setting a memory limit per collector |
| */ |
| public class CollectorMemoryTracker implements MemoryTracker { |
| private String name; |
| private AtomicLong memoryUsage; |
| private final long memoryLimit; |
| |
| public CollectorMemoryTracker(String name, long memoryLimit) { |
| this.name = name; |
| this.memoryUsage = new AtomicLong(); |
| this.memoryLimit = memoryLimit; |
| } |
| |
| @Override |
| public void updateBytes(long bytes) { |
| long currentMemoryUsage = memoryUsage.addAndGet(bytes); |
| |
| if (currentMemoryUsage > memoryLimit) { |
| throw new IllegalStateException("Memory limit exceeded for " + name); |
| } |
| if (currentMemoryUsage < 0) { |
| throw new IllegalStateException("Illegal Memory State for " + name); |
| } |
| } |
| |
| @Override |
| public long getBytes() { |
| return memoryUsage.get(); |
| } |
| } |