/*
* Licensed 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 com.facebook.presto.orc.memory;
import static com.google.common.base.MoreObjects.toStringHelper;
import static com.google.common.base.Preconditions.checkState;
import static java.util.Objects.requireNonNull;
public class AggregatedMemoryContext
extends AbstractAggregatedMemoryContext
{
// This class should remain exactly the same as AggregatedMemoryContext in com.facebook.presto.memory
private final AbstractAggregatedMemoryContext parentMemoryContext;
private long usedBytes;
private boolean closed;
public AggregatedMemoryContext()
{
this.parentMemoryContext = null;
}
public AggregatedMemoryContext(AbstractAggregatedMemoryContext parentMemoryContext)
{
this.parentMemoryContext = requireNonNull(parentMemoryContext, "parentMemoryContext is null");
}
public long getBytes()
{
checkState(!closed);
return usedBytes;
}
@Override
protected void updateBytes(long bytes)
{
checkState(!closed);
if (parentMemoryContext != null) {
parentMemoryContext.updateBytes(bytes);
}
usedBytes += bytes;
}
public void close()
{
if (closed) {
return;
}
closed = true;
if (parentMemoryContext != null) {
parentMemoryContext.updateBytes(-usedBytes);
}
usedBytes = 0;
}
@Override
public String toString()
{
return toStringHelper(this)
.add("usedBytes", usedBytes)
.add("closed", closed)
.toString();
}
}