litesoft
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package org.litesoft.sequences;
import java.util.*;
import org.litesoft.configuration.*;
import org.litesoft.core.util.*;
public class SequenceSourceByGroup implements SequenceSource
{
private SequenceBlockSource mSequenceBlockSource;
public SequenceSourceByGroup( SequenceBlockSource pSequenceBlockSource )
{
UtilsCommon.assertNotNull( "SequenceBlockSource", mSequenceBlockSource = pSequenceBlockSource );
}
public synchronized void clearAllGroups()
{
mSequenceProxies.clear();
mSequenceBlockSource.clearAllGroups();
}
public synchronized void clear( String pGroup )
{
SequenceProxy proxy = mSequenceProxies.remove( pGroup );
if ( proxy != null )
{
proxy.clear();
}
}
public void preallocateNextSequenceNumbers( String pGroup, int pBlockSize, Long pRestartAt )
{
getSequenceProxy( pGroup ).preallocateNextSequenceNumbers( (pBlockSize < 1) ? 1 : pBlockSize, pRestartAt );
}
public long getNextSequenceNumber( String pGroup, Long pRestartAt )
{
return getSequenceProxy( pGroup ).getNextSequenceNumber( pRestartAt );
}
public long getNextSequenceNumber( String pGroup )
{
return getNextSequenceNumber( pGroup, null );
}
public long getNextSequenceNumber( Class pGroup )
{
return getNextSequenceNumber( pGroup.getName() );
}
private synchronized SequenceProxy getSequenceProxy( String pSequencePoolName )
{
SequenceProxy proxy = mSequenceProxies.get( pSequencePoolName );
if ( proxy == null )
{
proxy = new SequenceProxy( pSequencePoolName );
mSequenceProxies.put( pSequencePoolName, proxy );
}
return proxy;
}
private Map<String, SequenceProxy> mSequenceProxies = new HashMap<String, SequenceProxy>();
private class SequenceProxy
{
private String mGroup;
private SequenceBlock mBlock = SequenceBlockImpl.INITIAL;
private int mBlockSize = 100;
public SequenceProxy( String pGroup )
{
mGroup = pGroup;
int bs = Configuration.getInteger( pGroup + ".blocksize", -1 );
if ( bs < 1 )
{
bs = Configuration.getInteger( "blocksize", 100 );
}
if ( bs > 0 )
{
mBlockSize = bs;
}
}
public synchronized void preallocateNextSequenceNumbers( int pBlockSize, Long pRestartAt )
{
if ( pBlockSize > mBlock.available() )
{
mBlock = SequenceBlockChain.create( mBlock, //
mSequenceBlockSource.getNextBlock( mGroup, mBlock.getCurBlockEndExclusive(),
pBlockSize - mBlock.available(), pRestartAt ) );
}
}
public synchronized void clear()
{
mBlock = SequenceBlockImpl.INITIAL;
mSequenceBlockSource.clear( mGroup );
}
public synchronized long getNextSequenceNumber( Long pRestartAt )
{
if ( !mBlock.hasMore() )
{
mBlock = mSequenceBlockSource.getNextBlock( mGroup, mBlock.getCurBlockEndExclusive(), mBlockSize, pRestartAt );
}
return mBlock.next();
}
}
}
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Revision |
Author |
Commited |
Message |
2
|
GeorgeS
|
Sun 07 Feb, 2010 12:50:58 +0000 |
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