/*
* Copyright 2012 Bill La Forge
*
* This file is part of AgileWiki and is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License (LGPL) as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This code 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
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
* or navigate to the following url http://www.gnu.org/licenses/lgpl-2.1.txt
*
* Note however that only Scala, Java and JavaScript files are being covered by LGPL.
* All other files are covered by the Common Public License (CPL).
* A copy of this license is also included and can be
* found as well at http://www.opensource.org/licenses/cpl1.0.txt
*/
package org.agilewiki.jfile.transactions.transactionAggregator;
import org.agilewiki.jactor.RP;
import org.agilewiki.jactor.factory.ActorFactory;
import org.agilewiki.jfile.JFileFactories;
import org.agilewiki.jfile.UniqueClock;
import org.agilewiki.jfile.UniqueTimestamp;
import org.agilewiki.jfile.block.Block;
import org.agilewiki.jfile.block.LTA32Block;
import org.agilewiki.jfile.transactions.*;
import org.agilewiki.jid.scalar.vlens.actor.RootJid;
/**
* Aggregates transactions into blocks.
*/
public class TransactionAggregator extends BlockSource {
private RootJid rootJid;
private EvaluatorListJid transactionListJid;
private boolean writePending;
/**
* Creates a new block.
*
* @return A new block.
*/
protected Block newBlock() {
return new LTA32Block();
}
public void aggregateTransaction(String actorType, ActorFactory actorFactory, byte[] bytes, final RP rp)
throws Exception {
makeRootJid();
transactionListJid.iAdd(-1);
EvaluatorActorJid transactionActorJid = (EvaluatorActorJid) transactionListJid.iGet(-1);
if (actorType != null) {
if (bytes == null) {
transactionActorJid.setValue(actorType);
} else {
transactionActorJid.setJidBytes(actorType, bytes);
}
} else {
if (bytes == null) {
transactionActorJid.setValue(actorFactory);
} else {
transactionActorJid.setJidBytes(actorFactory, bytes);
}
}
if (!rp.isEvent()) {
GetTransactionResult.req.send(this, transactionActorJid.getValue(), rp);
getMailbox().sendPendingMessages();
}
if (!writePending) {
writeBlock();
}
}
private void makeRootJid()
throws Exception {
if (rootJid != null)
return;
rootJid = new RootJid();
rootJid.initialize(getMailboxFactory().createMailbox(), getParent());
rootJid.setValue(JFileFactories.EVALUATER_LIST_JID_TYPE);
transactionListJid = (EvaluatorListJid) rootJid.getValue();
}
private void writeBlock()
throws Exception {
if (rootJid == null)
return;
final Block block = newBlock();
block.setRootJid(rootJid);
rootJid = null;
writePending = true;
UniqueClock uc = UniqueClock.uc(getMailboxFactory());
UniqueTimestamp.req.send(this, uc, new RP<Long>() {
public void processResponse(Long response)
throws Exception {
block.setTimestamp(response);
(new ProcessBlock(block)).send(TransactionAggregator.this, blockFlowBuffer, new RP<Object>() {
@Override
public void processResponse(Object response)
throws Exception {
writePending = false;
if (getMailbox().isEmpty())
writeBlock();
}
});
getMailbox().sendPendingMessages();
}
});
}
}