@Override
public synchronized void rollback() throws SailException {
trx = null;
metadata.clear();
revised.clear();
modified.clear();
arch.clear();
super.rollback();
}
private void addMetadata(Resource subj, URI pred, Value obj, Resource context)
throws SailException {
if (trx == null) {
synchronized (metadata) {
metadata.add(vf.createStatement(subj, pred, obj, context));
}
} else {
storeStatement(subj, pred, obj, context);
}
}
private URI getTrx() throws SailException {
if (trx == null) {
trx = sail.nextTransaction();
synchronized (metadata) {
for (Statement st : metadata) {
storeStatement(st.getSubject(), st.getPredicate(), st.getObject(), st.getContext());
}
metadata.clear();
}
}
return trx;
}
@Override
public synchronized void commit() throws SailException {
flushArchive();
if (trx != null) {
for (Statement st : arch) {
Resource ctx = st.getContext();
if (ctx instanceof URI) {
modified.add(ctx);
}
}
for (Resource ctx : modified) {
if (isObsolete(ctx)) {
super.addStatement(ctx, RDF.TYPE, Audit.OBSOLETE, trx);
}
}
GregorianCalendar cal = new GregorianCalendar();
XMLGregorianCalendar xgc = factory.newXMLGregorianCalendar(cal);
Literal now = vf.createLiteral(xgc);
super.addStatement(trx, RDF.TYPE, TRANSACTION, trx);
super.addStatement(trx, COMMITTED_ON, now, trx);
for (Resource predecessor : predecessors) {
super.addStatement(trx, PREDECESSOR, predecessor, trx);
}
sail.recent(trx, getWrappedConnection());
}
super.commit();
metadata.clear();
revised.clear();
modified.clear();
arch.clear();
if (trx != null) {
sail.committed(trx, predecessors);
predecessors = Collections.singleton(trx);
trx = null;
}
}