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Example 1 with StartFeedStatement

use of org.apache.asterix.lang.common.statement.StartFeedStatement in project asterixdb by apache.

the class QueryTranslator method handleStartFeedStatement.

private void handleStartFeedStatement(MetadataProvider metadataProvider, Statement stmt, IHyracksClientConnection hcc) throws Exception {
    StartFeedStatement sfs = (StartFeedStatement) stmt;
    String dataverseName = getActiveDataverse(sfs.getDataverseName());
    String feedName = sfs.getFeedName().getValue();
    // Transcation handler
    MetadataTransactionContext mdTxnCtx = MetadataManager.INSTANCE.beginTransaction();
    metadataProvider.setMetadataTxnContext(mdTxnCtx);
    // Runtime handler
    EntityId entityId = new EntityId(Feed.EXTENSION_NAME, dataverseName, feedName);
    // Feed & Feed Connections
    Feed feed = FeedMetadataUtil.validateIfFeedExists(dataverseName, feedName, metadataProvider.getMetadataTxnContext());
    List<FeedConnection> feedConnections = MetadataManager.INSTANCE.getFeedConections(metadataProvider.getMetadataTxnContext(), dataverseName, feedName);
    ILangCompilationProvider compilationProvider = new AqlCompilationProvider();
    IStorageComponentProvider storageComponentProvider = new StorageComponentProvider();
    DefaultStatementExecutorFactory qtFactory = new DefaultStatementExecutorFactory();
    ActiveLifecycleListener activeListener = (ActiveLifecycleListener) appCtx.getActiveLifecycleListener();
    ActiveJobNotificationHandler activeEventHandler = activeListener.getNotificationHandler();
    FeedEventsListener listener = (FeedEventsListener) activeEventHandler.getActiveEntityListener(entityId);
    if (listener != null) {
        throw new AlgebricksException("Feed " + feedName + " is started already.");
    }
    // Start
    MetadataLockManager.INSTANCE.startFeedBegin(metadataProvider.getLocks(), dataverseName, dataverseName + "." + feedName, feedConnections);
    try {
        // Prepare policy
        List<IDataset> datasets = new ArrayList<>();
        for (FeedConnection connection : feedConnections) {
            Dataset ds = metadataProvider.findDataset(connection.getDataverseName(), connection.getDatasetName());
            datasets.add(ds);
        }
        org.apache.commons.lang3.tuple.Pair<JobSpecification, AlgebricksAbsolutePartitionConstraint> jobInfo = FeedOperations.buildStartFeedJob(sessionOutput, metadataProvider, feed, feedConnections, compilationProvider, storageComponentProvider, qtFactory, hcc);
        JobSpecification feedJob = jobInfo.getLeft();
        listener = new FeedEventsListener(appCtx, entityId, datasets, jobInfo.getRight().getLocations());
        activeEventHandler.registerListener(listener);
        IActiveEventSubscriber eventSubscriber = listener.subscribe(ActivityState.STARTED);
        feedJob.setProperty(ActiveJobNotificationHandler.ACTIVE_ENTITY_PROPERTY_NAME, entityId);
        JobUtils.runJob(hcc, feedJob, Boolean.valueOf(metadataProvider.getConfig().get(StartFeedStatement.WAIT_FOR_COMPLETION)));
        eventSubscriber.sync();
        LOGGER.log(Level.INFO, "Submitted");
    } catch (Exception e) {
        abort(e, e, mdTxnCtx);
        if (listener != null) {
            activeEventHandler.unregisterListener(listener);
        }
        throw e;
    } finally {
        metadataProvider.getLocks().unlock();
    }
}
Also used : FeedEventsListener(org.apache.asterix.external.feed.management.FeedEventsListener) ArrayList(java.util.ArrayList) MetadataTransactionContext(org.apache.asterix.metadata.MetadataTransactionContext) ActiveLifecycleListener(org.apache.asterix.active.ActiveLifecycleListener) ILangCompilationProvider(org.apache.asterix.compiler.provider.ILangCompilationProvider) IDataset(org.apache.asterix.common.metadata.IDataset) JobSpecification(org.apache.hyracks.api.job.JobSpecification) ActiveJobNotificationHandler(org.apache.asterix.active.ActiveJobNotificationHandler) Feed(org.apache.asterix.metadata.entities.Feed) AqlCompilationProvider(org.apache.asterix.compiler.provider.AqlCompilationProvider) IStorageComponentProvider(org.apache.asterix.common.context.IStorageComponentProvider) FeedConnection(org.apache.asterix.metadata.entities.FeedConnection) IHyracksDataset(org.apache.hyracks.api.dataset.IHyracksDataset) IDataset(org.apache.asterix.common.metadata.IDataset) Dataset(org.apache.asterix.metadata.entities.Dataset) IActiveEventSubscriber(org.apache.asterix.active.IActiveEventSubscriber) AlgebricksException(org.apache.hyracks.algebricks.common.exceptions.AlgebricksException) IStorageComponentProvider(org.apache.asterix.common.context.IStorageComponentProvider) StorageComponentProvider(org.apache.asterix.file.StorageComponentProvider) ACIDException(org.apache.asterix.common.exceptions.ACIDException) MetadataException(org.apache.asterix.metadata.MetadataException) AlgebricksException(org.apache.hyracks.algebricks.common.exceptions.AlgebricksException) HyracksDataException(org.apache.hyracks.api.exceptions.HyracksDataException) CompilationException(org.apache.asterix.common.exceptions.CompilationException) IOException(java.io.IOException) RemoteException(java.rmi.RemoteException) AsterixException(org.apache.asterix.common.exceptions.AsterixException) EntityId(org.apache.asterix.active.EntityId) StartFeedStatement(org.apache.asterix.lang.common.statement.StartFeedStatement) AlgebricksAbsolutePartitionConstraint(org.apache.hyracks.algebricks.common.constraints.AlgebricksAbsolutePartitionConstraint)

Aggregations

IOException (java.io.IOException)1 RemoteException (java.rmi.RemoteException)1 ArrayList (java.util.ArrayList)1 ActiveJobNotificationHandler (org.apache.asterix.active.ActiveJobNotificationHandler)1 ActiveLifecycleListener (org.apache.asterix.active.ActiveLifecycleListener)1 EntityId (org.apache.asterix.active.EntityId)1 IActiveEventSubscriber (org.apache.asterix.active.IActiveEventSubscriber)1 IStorageComponentProvider (org.apache.asterix.common.context.IStorageComponentProvider)1 ACIDException (org.apache.asterix.common.exceptions.ACIDException)1 AsterixException (org.apache.asterix.common.exceptions.AsterixException)1 CompilationException (org.apache.asterix.common.exceptions.CompilationException)1 IDataset (org.apache.asterix.common.metadata.IDataset)1 AqlCompilationProvider (org.apache.asterix.compiler.provider.AqlCompilationProvider)1 ILangCompilationProvider (org.apache.asterix.compiler.provider.ILangCompilationProvider)1 FeedEventsListener (org.apache.asterix.external.feed.management.FeedEventsListener)1 StorageComponentProvider (org.apache.asterix.file.StorageComponentProvider)1 StartFeedStatement (org.apache.asterix.lang.common.statement.StartFeedStatement)1 MetadataException (org.apache.asterix.metadata.MetadataException)1 MetadataTransactionContext (org.apache.asterix.metadata.MetadataTransactionContext)1 Dataset (org.apache.asterix.metadata.entities.Dataset)1