| /* |
| * 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.drill.exec.memory; |
| |
| import com.codahale.metrics.Gauge; |
| import com.google.common.annotations.VisibleForTesting; |
| import org.apache.drill.exec.metrics.DrillMetrics; |
| |
| /** |
| * The root allocator for using direct memory inside a Drillbit. Supports creating a |
| * tree of descendant child allocators. |
| */ |
| public class RootAllocator extends BaseAllocator { |
| |
| public RootAllocator(final long limit) { |
| super(null, "ROOT", 0, limit); |
| DrillMetrics.register("drill.allocator.root.used", new Gauge<Long>() { |
| @Override |
| public Long getValue() { |
| return getAllocatedMemory(); |
| } |
| }); |
| DrillMetrics.register("drill.allocator.root.peak", new Gauge<Long>() { |
| @Override |
| public Long getValue() { |
| return getPeakMemoryAllocation(); |
| } |
| }); |
| } |
| |
| /** |
| * Verify the accounting state of the allocation system. |
| */ |
| @VisibleForTesting |
| public void verify() { |
| verifyAllocator(); |
| } |
| } |