/**
* 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();
}
}