/** Begins a new read-only transaction. */
public void beginReadTxn() {
assert (!isTxnInProgress());
if (manageReposSession) {
repos.beginReposSession();
}
repos.beginReposTxn(false);
state = State.READ_TXN;
}
/** Begins a new read/write transaction. */
public void beginWriteTxn() {
assert (!isTxnInProgress());
if (readOnly) {
throw FarragoResource.instance().CatalogReadOnly.ex();
}
if (manageReposSession) {
repos.beginReposSession();
}
// NOTE jvs 12-Jan-2007: don't change state until AFTER successfully
// beginning a transaction; if beginReposTxn throws an excn,
// we want to stay in State.NO_TXN
repos.beginReposTxn(true);
state = State.WRITE_TXN;
}