Examples of org.voltdb.messaging.FragmentTaskMessage

org.voltdb.messaging.FragmentTaskMessage
Message from a stored procedure coordinator to an execution site which is participating in the transaction. This message specifies which planfragment to run and with which parameters.

            // already sequenced
            if (inTxnId <= m_lastPolledFragmentTxnId) {
                return false;
            }


            FragmentTaskMessage ftm  = (FragmentTaskMessage)in;
            if (found == null) {
                ReplayEntry newEntry = new ReplayEntry();
                newEntry.m_firstFragment = ftm;
                m_replayEntries.put(inTxnId, newEntry);
            }

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    {
        if (msg.getPayload() instanceof CompleteTransactionMessage) {
            return msg.getPayload();
        }
        else {
            FragmentTaskMessage ftm = (FragmentTaskMessage)msg.getPayload();
            // We currently don't want to restart read-only MP transactions because:
            // 1) We're not writing the Iv2InitiateTaskMessage to the first
            // FragmentTaskMessage in read-only case in the name of some unmeasured
            // performance impact,
            // 2) We don't want to perturb command logging and/or DR this close to the 3.0 release
            // 3) We don't guarantee the restarted results returned to the client
            // anyway, so not restarting the read is currently harmless.
            boolean restart = !ftm.isReadOnly();
            if (restart) {
                assert(ftm.getInitiateTask() != null);
                m_interruptedTxns.add(ftm.getInitiateTask());
            }
            CompleteTransactionMessage rollback =
                new CompleteTransactionMessage(
                        ftm.getInitiatorHSId(),
                        ftm.getCoordinatorHSId(),
                        ftm.getTxnId(),
                        ftm.isReadOnly(),
                        0,
                        true,   // Force rollback as our repair operation.
                        false,  // no acks in iv2.
                        restart,   // Indicate rollback for repair as appropriate
                        ftm.isForReplay());
            rollback.setOriginalTxnId(ftm.getOriginalTxnId());
            return rollback;
        }
    }

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        // Right now, any read on a replicated table which has no distributed work will
        // generate these null fragments in the restarted transaction.
        boolean usedNullFragment = false;
        if (m_isRestart && m_remoteWork == null) {
            usedNullFragment = true;
            m_remoteWork = new FragmentTaskMessage(m_localWork.getInitiatorHSId(),
                    m_localWork.getCoordinatorHSId(),
                    m_localWork.getTxnId(),
                    m_localWork.getUniqueId(),
                    m_localWork.isReadOnly(),
                    false,

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    {
        // Log invocation to DR
        if (m_drGateway != null && !m_txnState.isForReplay() && !m_txnState.isReadOnly() &&
            !m_completeMsg.isRollback())
        {
            FragmentTaskMessage fragment = (FragmentTaskMessage) m_txnState.getNotice();
            Iv2InitiateTaskMessage initiateTask = fragment.getInitiateTask();
            assert(initiateTask != null);
            if (initiateTask == null) {
                hostLog.error("Unable to log MP transaction to DR because of missing InitiateTaskMessage, " +
                              "fragment: " + fragment.toString());
            }
            StoredProcedureInvocation invocation = initiateTask.getStoredProcedureInvocation().getShallowCopy();
            m_drGateway.onSuccessfulMPCall(m_txnState.m_spHandle,
                    m_txnState.txnId,
                    m_txnState.uniqueId,

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                    m_lastTxnTime = EstTime.currentTimeMillis();
                    t.runFromTaskLog(this);
                }
            }
            else if (tibm instanceof FragmentTaskMessage) {
                FragmentTaskMessage m = (FragmentTaskMessage)tibm;
                if (global_replay_mpTxn == null) {
                    global_replay_mpTxn = new ParticipantTransactionState(m.getTxnId(), m);
                }
                else if (global_replay_mpTxn.txnId != m.getTxnId()) {
                    VoltDB.crashLocalVoltDB("Started a MP transaction during replay before completing " +
                            " open transaction.", false, null);
                }


                TransactionTask t;
                if (m.isSysProcTask()) {
                    t = new SysprocFragmentTask(m_initiatorMailbox, m, global_replay_mpTxn);
                } else {
                    t = new FragmentTask(m_initiatorMailbox, m, global_replay_mpTxn);
                }


                if (!filter(tibm)) {
                    m_currentTxnId = t.getTxnId();
                    m_lastTxnTime = EstTime.currentTimeMillis();
                    t.runFromTaskLog(this);
                }
            }
            else if (tibm instanceof CompleteTransactionMessage) {
                // Needs improvement: completes for sysprocs aren't filterable as sysprocs.
                // Only complete transactions that are open...
                if (global_replay_mpTxn != null) {
                    CompleteTransactionMessage m = (CompleteTransactionMessage)tibm;
                    CompleteTransactionTask t = new CompleteTransactionTask(global_replay_mpTxn,
                            null, m, m_drGateway);
                    if (!m.isRestart()) {
                        global_replay_mpTxn = null;
                    }
                    if (!filter(tibm)) {
                        t.runFromTaskLog(this);
                    }

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                MpProcedureTask next = (MpProcedureTask)e.getValue();
                tmLog.debug("MpTTQ: poisoning task: " + next);
                next.doRestart(masters, partitionMasters);
                MpTransactionState txn = (MpTransactionState)next.getTransactionState();
                // inject poison pill
                FragmentTaskMessage dummy = new FragmentTaskMessage(0L, 0L, 0L, 0L, false, false, false);
                FragmentResponseMessage poison =
                    new FragmentResponseMessage(dummy, 0L); // Don't care about source HSID here
                // Provide a TransactionRestartException which will be converted
                // into a ClientResponse.RESTART, so that the MpProcedureTask can
                // detect the restart and take the appropriate actions.

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Related Classes of org.voltdb.messaging.FragmentTaskMessage

org.voltdb.iv2.CompleteTransactionTask

org.voltdb.iv2.MpPromoteAlgo

org.voltdb.iv2.MpTransactionState

org.voltdb.iv2.MpTransactionTaskQueue

org.voltdb.iv2.RandomMsgGenerator

org.voltdb.iv2.ReplaySequencer

org.voltdb.iv2.Site

org.voltdb.iv2.SpScheduler

org.voltdb.iv2.TestMpPromoteAlgo

org.voltdb.iv2.TestMpTransactionState

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