com.gs.fw.common.mithra.cache.offheap.FastUnsafeOffHeapPageBuffer Maven / Gradle / Ivy
Go to download
Show more of this group Show more artifacts with this name
Show all versions of reladomo Show documentation
Show all versions of reladomo Show documentation
Reladomo is an object-relational mapping framework.
/*
Copyright 2016 Goldman Sachs.
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.gs.fw.common.mithra.cache.offheap;
import java.io.IOException;
import java.io.ObjectInput;
import java.io.ObjectOutput;
public class FastUnsafeOffHeapPageBuffer extends OffHeapMemoryReference
{
private long pageSize;
private int allocatedPages;
private FastUnsafeOffHeapIntList masterPageIndicies;
private FastUnsafeOffHeapLongList masterPageVersions;
private FastUnSafeOffHeapBitSet usedData;
public FastUnsafeOffHeapPageBuffer(long pageSize, int pagesToAllocate, FastUnsafeOffHeapIntList masterPageIndicies)
{
super(pageSize* pagesToAllocate);
this.pageSize = pageSize;
this.allocatedPages = pagesToAllocate;
this.masterPageIndicies = masterPageIndicies;
this.masterPageVersions = new FastUnsafeOffHeapLongList(pagesToAllocate);
this.registerForGarbageCollection();
this.usedData = new FastUnSafeOffHeapBitSet(this.allocatedPages);
}
public FastUnsafeOffHeapPageBuffer(long pageSize, int pagesToAllocate)
{
this(pageSize, pagesToAllocate, new FastUnsafeOffHeapIntList(pagesToAllocate));
}
public void copyPage(int pageToSend, long pageVersion, int bufferPageIndex, long pageAddress)
{
this.masterPageIndicies.set(bufferPageIndex, pageToSend);
this.masterPageVersions.set(bufferPageIndex, pageVersion);
UNSAFE.copyMemory(pageAddress, bufferPageIndex * pageSize + this.getBaseAddress(), pageSize);
if (allocatedPages <= bufferPageIndex)
{
allocatedPages = bufferPageIndex + 1;
}
}
public int getAllocatedPages()
{
return allocatedPages;
}
public int getUsedPages()
{
return this.masterPageIndicies.size();
}
public FastUnSafeOffHeapBitSet getUsedData()
{
return usedData;
}
public FastUnsafeOffHeapIntList getMasterPageIndicies()
{
return masterPageIndicies;
}
public FastUnsafeOffHeapLongList getMasterPageVersions()
{
return masterPageVersions;
}
@Override
public synchronized void destroy()
{
super.destroy();
this.masterPageIndicies.destroy();
this.masterPageVersions.destroy();
this.usedData.destroy();
}
public void sendPages(ObjectOutput out) throws IOException
{
out.writeInt(allocatedPages);
for(int i=0;i< allocatedPages;i++)
{
out.writeInt(masterPageIndicies.get(i));
out.writeLong(masterPageVersions.get(i));
for(long j=0;j= this.getBaseAddress();
assert pageEnd <= this.getBaseAddress() + this.getAllocatedLength();
for(long j=pageStart;j