public void commit()

in geronimo-transaction/src/main/java/org/apache/geronimo/transaction/manager/TransactionImpl.java [261:340]
63 lines of code
12 McCabe index (conditional complexity)

    public void commit() throws HeuristicMixedException, HeuristicRollbackException, RollbackException, SecurityException, SystemException {
        beforePrepare();

        try {
            if (TransactionTimer.getCurrentTime() > timeout) {
                markRollbackCause(new Exception("Transaction has timed out"));
                status = Status.STATUS_MARKED_ROLLBACK;
            }

            if (status == Status.STATUS_MARKED_ROLLBACK) {
                rollbackResources(resourceManagers, false);
                RollbackException rollbackException = new RollbackException("Unable to commit: transaction marked for rollback");
                if (markRollbackCause != null) {
                    rollbackException.initCause(markRollbackCause);
                }
                throw rollbackException;
            }
            synchronized (this) {
                if (status == Status.STATUS_ACTIVE) {
                    if (this.resourceManagers.size() == 0) {
                        // nothing to commit
                        status = Status.STATUS_COMMITTED;
                    } else if (this.resourceManagers.size() == 1) {
                        // one-phase commit decision
                        status = Status.STATUS_COMMITTING;
                    } else {
                        // start prepare part of two-phase
                        status = Status.STATUS_PREPARING;
                    }
                }
                // resourceManagers is now immutable
            }

            // no-phase
            if (resourceManagers.size() == 0) {
                synchronized (this) {
                    status = Status.STATUS_COMMITTED;
                }
                return;
            }

            // one-phase
            if (resourceManagers.size() == 1) {
                TransactionBranch manager = resourceManagers.getFirst();
                commitResource(manager);
                return;
            }

            boolean willCommit = false;
            try {
                // two-phase
                willCommit = internalPrepare();
            } catch (SystemException e) {
                rollbackResources(resourceManagers, false);
                throw e;
            }

            // notify the RMs
            if (willCommit) {
                //Re-check whether there are still left resourceMangers, as we might remove those Read-Only Resource in the voting process
                if (resourceManagers.size() == 0) {
                    synchronized (this) {
                        status = Status.STATUS_COMMITTED;
                    }
                    return;
                }
                commitResources(resourceManagers);
            } else {
                // set everRollback to true here because the rollback here is caused by
                // XAException during the above internalPrepare
                rollbackResources(resourceManagers, true);
                throw new RollbackException("transaction rolled back due to problems in prepare");
            }
        } finally {
            afterCompletion();
            synchronized (this) {
                status = Status.STATUS_NO_TRANSACTION;
            }
        }
    }