Package org.apache.falcon.expression

Examples of org.apache.falcon.expression.ExpressionHelper

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                Date feedStart = feedValidity.getStart();
                Date feedEnd = feedValidity.getEnd();

                String instStartEL = input.getStart();
                String instEndEL = input.getEnd();
                ExpressionHelper evaluator = ExpressionHelper.get();

                Validity processValidity = ProcessHelper.getCluster(process, clusterName).getValidity();
                ExpressionHelper.setReferenceDate(processValidity.getStart());
                Date instStart = evaluator.evaluate(instStartEL, Date.class);
                if (instStart.before(feedStart)) {
                    throw new ValidationException("Start instance  " + instStartEL + " of feed " + feed.getName()
                            + " is before the start of feed " + feedValidity.getStart() + " for cluster "
                            + clusterName);
                }

                Date instEnd = evaluator.evaluate(instEndEL, Date.class);
                if (instEnd.after(feedEnd)) {
                    throw new ValidationException("End instance  " + instEndEL + " of feed " + feed.getName()
                            + " is before the start of feed " + feedValidity.getStart() + " for cluster "
                            + clusterName);
                }
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    public static void validateFeedRetentionPeriod(String startInstance, Feed feed, String clusterName)
        throws FalconException {

        String feedRetention = FeedHelper.getCluster(feed, clusterName).getRetention().getLimit().toString();
        ExpressionHelper evaluator = ExpressionHelper.get();

        Date now = new Date();
        ExpressionHelper.setReferenceDate(now);
        Date instStart = evaluator.evaluate(startInstance, Date.class);
        long feedDuration = evaluator.evaluate(feedRetention, Long.class);
        Date feedStart = new Date(now.getTime() - feedDuration);

        if (instStart.before(feedStart)) {
            throw new ValidationException("StartInstance :" + startInstance + " of process is out of range for Feed: "
                    + feed.getName() + "  in cluster: " + clusterName + "'s retention limit :" + feedRetention);
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                        clusterName).getValidity();
                Date feedStart = feedValidity.getStart();
                Date feedEnd = feedValidity.getEnd();

                String instEL = output.getInstance();
                ExpressionHelper evaluator = ExpressionHelper.get();
                Validity processValidity = ProcessHelper.getCluster(process, clusterName).getValidity();
                ExpressionHelper.setReferenceDate(processValidity.getStart());
                Date inst = evaluator.evaluate(instEL, Date.class);
                if (inst.before(feedStart)) {
                    throw new ValidationException("Instance  " + instEL + " of feed " + feed.getName()
                            + " is before the start of feed " + feedValidity.getStart() + " for cluster" + clusterName);
                }
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        return (long) (getDurationInMilliSec(delay) * Math.pow(getPower(), eventNumber));
    }

    @Override
    public long getDelay(Frequency delay, Date nominalTime, Date cutOffTime) throws FalconException {
        ExpressionHelper evaluator = ExpressionHelper.get();
        Date now = new Date();
        Date lateTime = nominalTime;
        long delayMilliSeconds = evaluator.evaluate(delay.toString(), Long.class);
        int factor = 1;
        // TODO we can get rid of this using formula
        while (lateTime.compareTo(now) <= 0) {
            lateTime = addTime(lateTime, (int) (factor * delayMilliSeconds));
            factor *= getPower();
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    public static Date addTime(Date date, long milliSecondsToAdd) {
        return new Date(date.getTime() + milliSecondsToAdd);
    }

    public static Date getCutOffTime(Entity entity, String nominalTime) throws FalconException {
        ExpressionHelper evaluator = ExpressionHelper.get();
        Date instanceStart = EntityUtil.parseDateUTC(nominalTime);
        ExpressionHelper.setReferenceDate(instanceStart);
        Date endTime;
        Date feedCutOff = new Date(0);
        if (entity.getEntityType() == EntityType.FEED) {
            if (((Feed) entity).getLateArrival() == null) {
                LOG.debug("Feed's " + entity.getName()
                        + " late arrival cut-off is not configured, returning");
                return feedCutOff;
            }
            String lateCutOff = ((Feed) entity).getLateArrival().getCutOff()
                    .toString();
            endTime = EntityUtil.parseDateUTC(nominalTime);
            long feedCutOffPeriod = evaluator.evaluate(lateCutOff, Long.class);
            endTime = addTime(endTime, feedCutOffPeriod);
            return endTime;
        } else if (entity.getEntityType() == EntityType.PROCESS) {
            Process process = (Process) entity;
            ConfigurationStore store = ConfigurationStore.get();
            for (LateInput lp : process.getLateProcess().getLateInputs()) {
                Feed feed = null;
                String endInstanceTime = "";
                for (Input input : process.getInputs().getInputs()) {
                    if (input.getName().equals(lp.getInput())) {
                        endInstanceTime = input.getEnd();
                        feed = store.get(EntityType.FEED, input.getFeed());
                        break;
                    }
                }
                if (feed == null) {
                    throw new IllegalStateException("No such feed: " + lp.getInput());
                }
                if (feed.getLateArrival() == null) {
                    LOG.debug("Feed's " + feed.getName()
                            + " late arrival cut-off is not configured, ignoring this feed");
                    continue;
                }
                String lateCutOff = feed.getLateArrival().getCutOff()
                        .toString();
                endTime = evaluator.evaluate(endInstanceTime, Date.class);
                long feedCutOffPeriod = evaluator.evaluate(lateCutOff,
                        Long.class);
                endTime = addTime(endTime, feedCutOffPeriod);

                if (endTime.after(feedCutOff)) {
                    feedCutOff = endTime;
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* Base class for Rerun Policy.
*/
public abstract class AbstractRerunPolicy {

    public long getDurationInMilliSec(Frequency frequency) throws FalconException {
        ExpressionHelper helper = ExpressionHelper.get();
        return helper.evaluate(frequency.toString(), Long.class);
    }
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    public static String evaluateClusterExp(org.apache.falcon.entity.v0.cluster.Cluster clusterEntity, String exp)
        throws FalconException {

        Properties properties = loadClusterProperties(clusterEntity);
        ExpressionHelper expHelp = ExpressionHelper.get();
        expHelp.setPropertiesForVariable(properties);
        return expHelp.evaluateFullExpression(exp, String.class);
    }
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            throw new FalconException(e);
        }
    }

    private void validateFeedCutOffPeriod(Feed feed, Cluster cluster) throws FalconException {
        ExpressionHelper evaluator = ExpressionHelper.get();

        String feedRetention = cluster.getRetention().getLimit().toString();
        long retentionPeriod = evaluator.evaluate(feedRetention, Long.class);

        if (feed.getLateArrival() == null) {
            LOG.debug("Feed's late arrival cut-off not set");
            return;
        }
        String feedCutoff = feed.getLateArrival().getCutOff().toString();
        long feedCutOffPeriod = evaluator.evaluate(feedCutoff, Long.class);

        if (retentionPeriod < feedCutOffPeriod) {
            throw new ValidationException(
                    "Feed's retention limit: " + feedRetention + " of referenced cluster " + cluster.getName()
                            + " should be more than feed's late arrival cut-off period: " + feedCutoff + " for feed: "
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    public static String evaluateClusterExp(org.apache.falcon.entity.v0.cluster.Cluster clusterEntity, String exp)
        throws FalconException {

        Properties properties = loadClusterProperties(clusterEntity);
        ExpressionHelper expHelp = ExpressionHelper.get();
        expHelp.setPropertiesForVariable(properties);
        return expHelp.evaluateFullExpression(exp, String.class);
    }
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            throw new FalconException(e);
        }
    }

    private void validateFeedCutOffPeriod(Feed feed, Cluster cluster) throws FalconException {
        ExpressionHelper evaluator = ExpressionHelper.get();

        String feedRetention = cluster.getRetention().getLimit().toString();
        long retentionPeriod = evaluator.evaluate(feedRetention, Long.class);

        if (feed.getLateArrival() == null) {
            LOG.debug("Feed's late arrival cut-off not set");
            return;
        }
        String feedCutoff = feed.getLateArrival().getCutOff().toString();
        long feedCutOffPeriod = evaluator.evaluate(feedCutoff, Long.class);

        if (retentionPeriod < feedCutOffPeriod) {
            throw new ValidationException(
                    "Feed's retention limit: " + feedRetention + " of referenced cluster " + cluster.getName()
                            + " should be more than feed's late arrival cut-off period: " + feedCutoff + " for feed: "
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Related Classes of org.apache.falcon.expression.ExpressionHelper

  • org.apache.falcon.entity.FeedHelper
  • org.apache.falcon.entity.parser.CrossEntityValidations
  • org.apache.falcon.entity.parser.FeedEntityParser
  • org.apache.falcon.rerun.handler.LateRerunHandler
  • org.apache.falcon.rerun.policy.AbstractRerunPolicy
  • org.apache.falcon.rerun.policy.ExpBackoffPolicy
  • org.apache.falcon.FalconException
  • java.util.regex.Matcher
  • java.util.Calendar
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