Examples with SavepointController com.thinkbiganalytics.nifi.v2.core.savepoint.SavepointController used on opensource projects

Example 1 with SavepointController

use of com.thinkbiganalytics.nifi.v2.core.savepoint.SavepointController in project kylo by Teradata.

the class TriggerSavepoint method onTrigger.

@Override
public void onTrigger(final ProcessContext context, final ProcessSession session) throws ProcessException {
    FlowFile flowFile = session.get();
    if (flowFile == null) {
        return;
    }
    // Fetch the controller
    final SavepointController controller = context.getProperty(SAVEPOINT_SERVICE).asControllerService(SavepointController.class);
    final SavepointProvider provider = controller.getProvider();
    final ComponentLog logger = getLogger();
    final PropertyValue pvSavepointId = context.getProperty(SAVEPOINT_ID);
    final PropertyValue pvBehavior = context.getProperty(BEHAVIOR);
    final PropertyValue pvMaxRetries = context.getProperty(MAX_RETRIES);
    // We do processing on each flowfile here
    String behavior = pvBehavior.getValue();
    if (!FAIL.equals(behavior)) {
        final String savepointIdStr = pvSavepointId.evaluateAttributeExpressions(flowFile).getValue();
        Lock lock = null;
        try {
            lock = provider.lock(savepointIdStr);
            if (lock != null) {
                if (RELEASE.equals(behavior)) {
                    provider.release(savepointIdStr, lock, true);
                    flowFile = session.putAttribute(flowFile, SavepointProvenanceProperties.SAVE_POINT_BEHAVIOR_STATUS, behavior);
                    session.transfer(flowFile, REL_SUCCESS);
                } else if (RETRY.equals(behavior)) {
                    // Check the retry count from the SetSavepoint
                    String sRetryCount = flowFile.getAttribute(SetSavepoint.SAVEPOINT_RETRY_COUNT);
                    int retryCount = 0;
                    try {
                        if (sRetryCount != null) {
                            retryCount = Integer.parseInt(sRetryCount);
                        }
                    } catch (NumberFormatException nfe) {
                        logger.warn("{} has an invalid value '{}' on FlowFile {}", new Object[] { SetSavepoint.SAVEPOINT_RETRY_COUNT, sRetryCount, flowFile });
                    }
                    // Check retries
                    if (retryCount > pvMaxRetries.asInteger()) {
                        flowFile = session.putAttribute(flowFile, TriggerSavepoint.SAVE_POINT_MAX_RETRIES_EXCEEDED, sRetryCount);
                        session.transfer(flowFile, REL_MAX_RETRIES_EXCEEDED);
                        return;
                    }
                    // Penalize the flowfile once before retry is processed
                    String sRetryMarker = flowFile.getAttribute(SAVEPOINT_RETRY_MARKER);
                    if (StringUtils.isEmpty(sRetryMarker)) {
                        flowFile = session.penalize(flowFile);
                        flowFile = session.putAttribute(flowFile, SAVEPOINT_RETRY_MARKER, "1");
                        session.transfer(flowFile, REL_SELF);
                        return;
                    }
                    provider.retry(savepointIdStr, lock);
                    session.transfer(flowFile, REL_SUCCESS);
                }
            } else {
                // Unable to obtain lock. Try again
                session.transfer(flowFile, REL_SELF);
            }
        } catch (IOException | InvalidLockException | InvalidSetpointException e) {
            logger.info("Exception occurred for FlowFile {} exception {}", new Object[] { flowFile, e.getLocalizedMessage() }, e);
            // Check the retry count from the SetSavepoint
            String sTriggerFailureCount = flowFile.getAttribute(TriggerSavepoint.SAVEPOINT_TRIGGER_FAILURE_COUNT);
            int triggerFailureCount = 1;
            try {
                triggerFailureCount = (sTriggerFailureCount == null ? 0 : Integer.parseInt(sTriggerFailureCount));
                triggerFailureCount += 1;
            } catch (NumberFormatException nfe) {
                logger.info("Invalid attribute {}", new Object[] { TriggerSavepoint.SAVEPOINT_TRIGGER_FAILURE_COUNT });
            }
            flowFile = session.putAttribute(flowFile, TriggerSavepoint.SAVEPOINT_TRIGGER_FAILURE_COUNT, String.valueOf(triggerFailureCount));
            if (triggerFailureCount > MAX_FAILURES_ALLOWED) {
                logger.info("Maximum failures reached for sp {}, will route to fail.", new String[] { savepointIdStr });
                flowFile = session.putAttribute(flowFile, SavepointProvenanceProperties.SAVE_POINT_BEHAVIOR_STATUS, FAIL);
                flowFile = session.putAttribute(flowFile, TriggerSavepoint.SAVE_POINT_BEHAVIOR_STATUS_DESC, "Maximum failures at " + triggerFailureCount + " were reached.  Failing the flow");
                // add in the trigger flow id so ops manager can get the key to retry if needed
                String triggerFlowFile = flowFile.getAttribute(SavepointProvenanceProperties.PARENT_FLOWFILE_ID);
                if (StringUtils.isNotBlank(triggerFlowFile)) {
                    flowFile = session.putAttribute(flowFile, SavepointProvenanceProperties.SAVE_POINT_TRIGGER_FLOWFILE, triggerFlowFile);
                }
                session.transfer(flowFile, REL_FAILURE);
            } else {
                logger.info("Failed to process flowfile for savepoint {}", new String[] { savepointIdStr }, e);
                flowFile = session.penalize(flowFile);
                session.transfer(flowFile, REL_SELF);
            }
        } finally {
            if (lock != null) {
                try {
                    provider.unlock(lock);
                } catch (IOException e) {
                    logger.warn("Unable to unlock {}", new String[] { savepointIdStr });
                }
            }
        }
    } else {
        // Route to failure
        flowFile = session.putAttribute(flowFile, SavepointProvenanceProperties.SAVE_POINT_BEHAVIOR_STATUS, behavior);
        String triggerFlowFile = flowFile.getAttribute(SavepointProvenanceProperties.PARENT_FLOWFILE_ID);
        if (StringUtils.isNotBlank(triggerFlowFile)) {
            flowFile = session.putAttribute(flowFile, SavepointProvenanceProperties.SAVE_POINT_TRIGGER_FLOWFILE, triggerFlowFile);
        }
        session.transfer(flowFile, REL_FAILURE);
    }
}

Example 2 with SavepointController

use of com.thinkbiganalytics.nifi.v2.core.savepoint.SavepointController in project kylo by Teradata.

the class SetSavepoint method onTrigger.

@Override
public void onTrigger(final ProcessContext context, final ProcessSession session) throws ProcessException {
    final SavepointController controller = context.getProperty(SAVEPOINT_SERVICE).asControllerService(SavepointController.class);
    final SavepointProvider provider = controller.getProvider();
    final PropertyValue pvSavepointId = context.getProperty(SAVEPOINT_ID);
    final String processorId = getIdentifier();
    long start = System.currentTimeMillis();
    long expirationDuration = context.getProperty(EXPIRATION_DURATION).asTimePeriod(TimeUnit.MILLISECONDS);
    SavepointContextData savepointContextData = new SavepointContextData(controller, provider, pvSavepointId, processorId, expirationDuration);
    // the list of flow files to process
    List<FlowFile> flowFiles = null;
    // the flow file filter
    SavepointFlowFileFilter flowFileFilter = null;
    try {
        List<String> nextFlowFiles = controller.getNextFlowFiles(getIdentifier());
        flowFileFilter = new DefaultSavepointFlowFileFilter(nextFlowFiles, savepointContextData);
        flowFiles = session.get(flowFileFilter);
    } catch (CacheNotInitializedException e) {
        flowFileFilter = new SavepointCacheInitializingFilter(savepointContextData);
        flowFiles = ((SavepointCacheInitializingFilter) flowFileFilter).initializeAndFilter(session);
    }
    // if we are unable to find any flow files, yield the processor
    if (flowFiles == null || flowFiles.isEmpty()) {
        context.yield();
        return;
    }
    long stop = System.currentTimeMillis();
    getLogger().info("Time to iterate over {} flow files: {} ms, using filter: {}.  Will Process: {} flow files.  Will skip {} flow files.", new Object[] { session.getQueueSize(), (stop - start), flowFileFilter.getClass().getSimpleName(), flowFileFilter.getAcceptedCount(), flowFileFilter.getRejectedCount() });
    for (FlowFile flowFile : flowFiles) {
        if (!isScheduled()) {
            // If stopped, re-queue FlowFile instead of sending it
            session.transfer(flowFile);
            continue;
        }
        getLogger().info("Processsing flow file {} ", new Object[] { flowFile.getAttribute(CoreAttributes.UUID.key()) });
        processFlowFile(flowFile, context, session, savepointContextData);
    }
}

Example 3 with SavepointController

use of com.thinkbiganalytics.nifi.v2.core.savepoint.SavepointController in project kylo by Teradata.

the class SetSavepoint method getNextFlowFile.

/**
 * Return the next available flow file in the queue that is not in a waiting state.
 *
 * @param session       the process session
 * @param provider      the save point provider
 * @param pvSavepointId the savepoint id
 * @return the first flowfile not in a waiting savepoint state
 */
private Optional<FlowFile> getNextFlowFile(ProcessContext context, ProcessSession session, SavepointController controller, SavepointProvider provider, PropertyValue pvSavepointId) {
    long expirationDuration = context.getProperty(EXPIRATION_DURATION).asTimePeriod(TimeUnit.MILLISECONDS);
    FlowFileFilter flowFileFilter = null;
    try {
        Optional<String> nextFlowFile = controller.getNextFlowFile(getIdentifier());
        flowFileFilter = new FindFirstFlowFileFilter(nextFlowFile, expirationDuration, controller);
        return session.get(flowFileFilter).stream().findFirst();
    } catch (CacheNotInitializedException e) {
        CacheInitializingFilter filter = new CacheInitializingFilter(pvSavepointId, controller, provider, expirationDuration);
        return filter.initializeAndGetNextFlowfile(session);
    }
}

Example 4 with SavepointController

use of com.thinkbiganalytics.nifi.v2.core.savepoint.SavepointController in project kylo by Teradata.

the class SetSavepoint method processFlowFile.

private void processFlowFile(FlowFile flowFile, final ProcessContext context, final ProcessSession session, final SavepointContextData contextData) {
    final ComponentLog logger = getLogger();
    final SavepointController controller = contextData.getController();
    final SavepointProvider provider = contextData.getProvider();
    final PropertyValue pvSavepointId = contextData.getSavepointId();
    final String processorId = contextData.getProcessorId();
    // We do processing on each flowfile here
    final String savepointIdStr = pvSavepointId.evaluateAttributeExpressions(flowFile).getValue();
    final String flowfileId = flowFile.getAttribute(CoreAttributes.UUID.key());
    Lock lock = null;
    try {
        lock = provider.lock(savepointIdStr);
        if (lock != null) {
            SavepointEntry entry = provider.lookupEntry(savepointIdStr);
            if (isExpired(context, session, provider, flowFile, savepointIdStr, lock)) {
                return;
            }
            String waitStartTimestamp;
            // add the processor id for the current savepoint
            // this will be used to check on the next save point if the flow file should be examined and processed.
            flowFile = session.putAttribute(flowFile, SAVEPOINT_PROCESSOR_ID, getIdentifier());
            if (entry == null || entry.getState(processorId) == null) {
                // Register new
                provider.register(savepointIdStr, processorId, flowfileId, lock);
                flowFile = tryFlowFile(session, flowFile, "-1");
                // add in timestamps
                // Set wait start timestamp if it's not set yet
                waitStartTimestamp = flowFile.getAttribute(SAVEPOINT_START_TIMESTAMP);
                if (waitStartTimestamp == null) {
                    waitStartTimestamp = String.valueOf(System.currentTimeMillis());
                    flowFile = session.putAttribute(flowFile, SAVEPOINT_START_TIMESTAMP, waitStartTimestamp);
                }
                session.transfer(flowFile);
            } else {
                SavepointEntry.SavePointState state = entry.getState(processorId);
                switch(state) {
                    case RELEASE_SUCCESS:
                        provider.commitRelease(savepointIdStr, processorId, lock);
                        // add provenance to indicate success
                        flowFile = session.putAttribute(flowFile, SavepointProvenanceProperties.RELEASE_STATUS_KEY, SavepointProvenanceProperties.RELEASE_STATUS.SUCCESS.name());
                        session.transfer(flowFile, REL_RELEASE_SUCCESS);
                        break;
                    case RELEASE_FAILURE:
                        provider.commitRelease(savepointIdStr, processorId, lock);
                        // add provenance to indicate failure
                        flowFile = session.putAttribute(flowFile, SavepointProvenanceProperties.RELEASE_STATUS_KEY, SavepointProvenanceProperties.RELEASE_STATUS.FAILURE.name());
                        session.transfer(flowFile, REL_RELEASE_FAILURE);
                        break;
                    case RETRY:
                        String retryCount = flowFile.getAttribute(SAVEPOINT_RETRY_COUNT);
                        if (retryCount == null) {
                            retryCount = "0";
                        }
                        provider.commitRetry(savepointIdStr, processorId, lock);
                        flowFile = tryFlowFile(session, flowFile, retryCount);
                        session.transfer(flowFile);
                        break;
                    case WAIT:
                        session.transfer(flowFile, REL_SELF);
                        break;
                    default:
                        logger.warn("Unexpected savepoint state.");
                        session.transfer(flowFile, REL_FAILURE);
                }
            }
        } else {
            // Lock busy so try again later
            // add it back to cache
            controller.putFlowfileBack(processorId, flowfileId, true);
            logger.info("Unable to obtain lock.  It is already locked by another process.  Adding back to queue {} ", new Object[] { flowfileId });
            session.transfer(flowFile, REL_SELF);
        }
    } catch (IOException | InvalidLockException | InvalidSetpointException e) {
        logger.warn("Failed to process flowfile {} for savepoint {}", new String[] { flowfileId, savepointIdStr }, e);
        flowFile = session.putAttribute(flowFile, SAVEPOINT_EXCEPTION, "Failed to process flowfile " + flowfileId + " for savepoint " + savepointIdStr + ". " + e.getMessage());
        session.transfer(flowFile, REL_FAILURE);
    } finally {
        if (lock != null) {
            try {
                provider.unlock(lock);
            } catch (IOException e) {
                logger.warn("Unable to unlock {}", new String[] { savepointIdStr });
            }
        }
    }
}