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FakeHeapAllocation.java
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FakeHeapAllocation.java
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/*
* Copyright (c) 2002-2018 "Neo Technology,"
* Network Engine for Objects in Lund AB [http://neotechnology.com]
*
* This file is part of Neo4j.
*
* Neo4j is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
package org.neo4j.test;
import org.junit.rules.TestRule;
import org.junit.runner.Description;
import org.junit.runners.model.Statement;
import org.neo4j.collection.primitive.PrimitiveLongLongMap;
import org.neo4j.memory.GlobalMemoryTracker;
import org.neo4j.resources.HeapAllocation;
import static java.lang.Thread.currentThread;
import static org.neo4j.collection.primitive.Primitive.offHeapLongLongMap;
public class FakeHeapAllocation extends HeapAllocation implements TestRule
{
private final PrimitiveLongLongMap allocation = offHeapLongLongMap( GlobalMemoryTracker.INSTANCE );
@Override
public long allocatedBytes( long threadId )
{
return Math.max( 0, allocation.get( threadId ) );
}
public FakeHeapAllocation add( long bytes )
{
return add( currentThread().getId(), bytes );
}
public FakeHeapAllocation add( long threadId, long bytes )
{
allocation.put( threadId, allocatedBytes( threadId ) + bytes );
return this;
}
@Override
public Statement apply( Statement base, Description description )
{
return new Statement()
{
@Override
public void evaluate() throws Throwable
{
try
{
base.evaluate();
}
finally
{
allocation.close();
}
}
};
}
}