Examples of org.voltdb.dtxn.TransactionState

org.voltdb.dtxn.TransactionState
Controls the state of a transaction. Encapsulates from the SimpleDTXNConnection all the logic about what needs to happen next in a transaction. The DTXNConn just pumps events into the TransactionState and it takes the appropriate actions, ultimately it will return true from finished().

     * @return the resulting VoltTable as a length-one array.
     */
    public VoltTable[] executeSysProcPlanFragments(
            SynthesizedPlanFragment pfs[], int aggregatorOutputDependencyId) {


        TransactionState txnState = m_runner.getTxnState();


        // the stack frame drop terminates the recursion and resumes
        // execution of the current stored procedure.
        assert (txnState != null);
        txnState.setupProcedureResume(false, new int[] { aggregatorOutputDependencyId });


        VoltTable[] results = new VoltTable[1];
        executeSysProcPlanFragmentsAsync(pfs);


        // execute the tasks that just got queued.

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     *            table returned as the result of this procedure.
     */
    public void executeSysProcPlanFragmentsAsync(
            SynthesizedPlanFragment pfs[]) {


        TransactionState txnState = m_runner.getTxnState();


        for (SynthesizedPlanFragment pf : pfs) {
            assert (pf.parameters != null);


            // check the output dep id makes sense given the number of sites to
            // run this on
            if (pf.multipartition) {
                assert ((pf.outputDepId & DtxnConstants.MULTIPARTITION_DEPENDENCY) == DtxnConstants.MULTIPARTITION_DEPENDENCY);
            }


            FragmentTaskMessage task = FragmentTaskMessage.createWithOneFragment(
                    txnState.initiatorHSId,
                    m_site.getCorrespondingSiteId(),
                    txnState.txnId,
                    txnState.uniqueId,
                    txnState.isReadOnly(),
                    fragIdToHash(pf.fragmentId),
                    pf.outputDepId,
                    pf.parameters,
                    false,
                    txnState.isForReplay());
            if (pf.inputDepIds != null) {
                for (int depId : pf.inputDepIds) {
                    task.addInputDepId(0, depId);
                }
            }
            task.setFragmentTaskType(FragmentTaskMessage.SYS_PROC_PER_SITE);
            if (pf.suppressDuplicates) {
                task.setFragmentTaskType(FragmentTaskMessage.SYS_PROC_PER_PARTITION);
            }


            if (pf.multipartition) {
                // create a workunit for every execution site
                txnState.createAllParticipatingFragmentWork(task);
            } else {
                // create one workunit for the current site
                if (pf.siteId == -1)
                    txnState.createLocalFragmentWork(task, false);
                else
                    txnState.createFragmentWork(new long[] { pf.siteId },
                                                         task);
            }
        }
    }

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    protected void registerUndoAction(UndoAction action) {
        m_runner.getTxnState().registerUndoAction(action);
    }


    protected Long getMasterHSId(int partition) {
        TransactionState txnState = m_runner.getTxnState();
        if (txnState instanceof MpTransactionState) {
            return ((MpTransactionState) txnState).getMasterHSId(partition);
        } else {
            throw new RuntimeException("SP sysproc doesn't support getting the master HSID");
        }

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        // move backwards anyway once the next message is received
        // from the SP leader.
        long newSpHandle = getMaxTaskedSpHandle();
        Iv2Trace.logFragmentTaskMessage(message.getFragmentTaskMessage(),
                m_mailbox.getHSId(), newSpHandle, true);
        TransactionState txn = m_outstandingTxns.get(message.getTxnId());


        if (txn == null) {
            // If the borrow is the first fragment for a transaction, run it as
            // a single partition fragment; Must not  engage/pause this
            // site on a MP transaction before the SP instructs to do so.

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     * path, and assumes that the caller has dealt with or ensured that the
     * necessary ID, SpHandles, and replication issues are resolved.
     */
    private void doLocalFragmentOffer(FragmentTaskMessage msg)
    {
        TransactionState txn = m_outstandingTxns.get(msg.getTxnId());
        boolean logThis = false;
        // bit of a hack...we will probably not want to create and
        // offer FragmentTasks for txn ids that don't match if we have
        // something in progress already
        if (txn == null) {
            txn = new ParticipantTransactionState(msg.getSpHandle(), msg);
            m_outstandingTxns.put(msg.getTxnId(), txn);
            // Only want to send things to the command log if it satisfies this predicate
            // AND we've never seen anything for this transaction before.  We can't
            // actually log until we create a TransactionTask, though, so just keep track
            // of whether it needs to be done.
            logThis = (msg.getInitiateTask() != null && !msg.getInitiateTask().isReadOnly());
        }


        // Check to see if this is the final task for this txn, and if so, if we can close it out early
        // Right now, this just means read-only.
        // NOTE: this overlaps slightly with CompleteTransactionMessage handling completion.  It's so tiny
        // that for now, meh, but if this scope grows then it should get refactored out
        if (msg.isFinalTask() && txn.isReadOnly()) {
            m_outstandingTxns.remove(msg.getTxnId());
        }


        TransactionTask task;
        if (msg.isSysProcTask()) {

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                m_mailbox.send(m_sendToHSIds, msg);
            }
        } else {
            setMaxSeenTxnId(msg.getSpHandle());
        }
        TransactionState txn = m_outstandingTxns.get(msg.getTxnId());
        // We can currently receive CompleteTransactionMessages for multipart procedures
        // which only use the buddy site (replicated table read).  Ignore them for
        // now, fix that later.
        if (txn != null)
        {

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    // to offer them to the corresponding TransactionState so that the TransactionTask in
    // the runloop which is awaiting these responses can do dependency tracking and eventually
    // unblock.
    public void handleFragmentResponseMessage(FragmentResponseMessage message)
    {
        TransactionState txn = m_outstandingTxns.get(message.getTxnId());
        // We could already have received the CompleteTransactionMessage from
        // the local site and the transaction is dead, despite FragmentResponses
        // in flight from remote sites.  Drop those on the floor.
        // IZZY: After implementing BorrowTasks, I'm not sure that the above sequence
        // can actually happen any longer, but leaving this and logging it for now.

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        try {
            // Only poll messaging layer if necessary. Allow the poll
            // to block if the execution site is truly idle.
            while (m_shouldContinue) {
                TransactionState currentTxnState = null;
                m_currentTransactionState = currentTxnState;
                if (currentTxnState == null) {
                    // poll the messaging layer for a while as this site has nothing to do
                    // this will likely have a message/several messages immediately in a heavy workload
                    // Before blocking record the starvation

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     * Run the execution site execution loop, for tests currently.
     * Will integrate this in to the real run loop soon.. ish.
     */
    public void runLoop(boolean loopUntilPoison) {
        while (m_shouldContinue) {
            TransactionState currentTxnState = null;
            m_currentTransactionState = currentTxnState;
            if (currentTxnState == null) {
                // poll the messaging layer for a while as this site has nothing to do
                // this will likely have a message/several messages immediately in a heavy workload
                VoltMessage message = m_mailbox.recv();

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            // it can be used for global ordering since it is a valid txnid from an initiator
            else if (info instanceof MultiPartitionParticipantMessage) {
            }


            // Every non-heartbeat notice requires a transaction state.
            TransactionState ts = m_transactionsById.get(info.getTxnId());


            if (ts != null)
            {
                if (message instanceof FragmentTaskMessage) {
                    ts.createLocalFragmentWork((FragmentTaskMessage)message, false);
                }
            }
        } else if (message instanceof RecoveryMessage) {
            final RecoveryMessage rm = (RecoveryMessage)message;
            if (rm.recoveryMessagesAvailable()) {
                return;
            }
            assert(!m_rejoining);


            /*
             * Recovery site processor hasn't been cleaned up from the previous
             * rejoin. New rejoin request cannot be processed now. Telling the
             * rejoining site to retry later.
             */
            if (m_rejoinSnapshotProcessor != null) {
                m_rejoinLog.error("ExecutionSite is not ready to handle " +
                        "recovery request from site " +
                        CoreUtils.hsIdToString(rm.sourceSite()));
                RecoveryMessage recoveryResponse = new RecoveryMessage(false);
                m_mailbox.send(rm.sourceSite(), recoveryResponse);
                return;
            }


            final long recoveringPartitionTxnId = rm.txnId();
            m_rejoinLog.info(
                    "Recovery initiate received at site " + CoreUtils.hsIdToString(m_siteId) +
                    " from site " + CoreUtils.hsIdToString(rm.sourceSite()) + " requesting recovery start before txnid " +
                    recoveringPartitionTxnId);
        }
        else if (message instanceof RejoinMessage) {
            RejoinMessage rm = (RejoinMessage) message;
            handleRejoinMessage(rm);
        }
        else if (message instanceof CheckTxnStateCompletionMessage) {
            long txn_id = ((CheckTxnStateCompletionMessage)message).m_txnId;
            TransactionState txnState = m_transactionsById.get(txn_id);
            if (txnState != null)
            {
            }
        }
        else if (message instanceof ExecutionSiteLocalSnapshotMessage) {

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Related Classes of org.voltdb.dtxn.TransactionState

org.voltdb.ExecutionSite

org.voltdb.iv2.MpScheduler

org.voltdb.iv2.SpScheduler

org.voltdb.iv2.TransactionTaskQueue

org.voltdb.VoltSystemProcedure

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