Java tutorial
/* * Licensed to the Apache Software Foundation (ASF) under one or more * contributor license agreements. See the NOTICE file distributed with * this work for additional information regarding copyright ownership. * The ASF licenses this file to You under the Apache License, Version 2.0 * (the "License"); you may not use this file except in compliance with * the License. You may obtain a copy of the License at * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * See the License for the specific language governing permissions and * limitations under the License. */ package gobblin.compaction.event; import java.io.IOException; import org.apache.hadoop.fs.FileSystem; import org.apache.hadoop.fs.Path; import org.apache.hadoop.mapreduce.Counter; import org.apache.hadoop.mapreduce.Counters; import org.apache.hadoop.mapreduce.Job; import org.slf4j.Logger; import org.slf4j.LoggerFactory; import com.google.common.base.Optional; import gobblin.compaction.dataset.Dataset; import gobblin.compaction.mapreduce.MRCompactor; import gobblin.compaction.mapreduce.avro.AvroKeyDedupReducer; import gobblin.compaction.mapreduce.avro.AvroKeyMapper; import gobblin.configuration.State; import gobblin.metrics.event.sla.SlaEventKeys; import gobblin.metrics.event.sla.SlaEventSubmitter; import gobblin.metrics.event.sla.SlaEventSubmitter.SlaEventSubmitterBuilder; /** * Helper class to build compaction sla event metadata. */ public class CompactionSlaEventHelper { private static final Logger LOG = LoggerFactory.getLogger(CompactionSlaEventHelper.class); public static final String RECOMPATED_METADATA_NAME = "recompacted"; public static final String DATASET_OUTPUT_PATH = "datasetOutputPath"; public static final String LATE_RECORD_COUNT = "lateRecordCount"; public static final String REGULAR_RECORD_COUNT = "regularRecordCount"; public static final String NEED_RECOMPACT = "needRecompact"; public static final String COMPACTION_COMPLETED_EVENT_NAME = "CompactionCompleted"; public static final String COMPACTION_FAILED_EVENT_NAME = "CompactionFailed"; public static final String COMPLETION_VERIFICATION_FAILED_EVENT_NAME = "CompletenessCannotBeVerified"; public static final String COMPLETION_VERIFICATION_SUCCESS_EVENT_NAME = "CompletenessVerified"; public static final String COMPACTION_RECORD_COUNT_EVENT = "CompactionRecordCounts"; /** * Get an {@link SlaEventSubmitterBuilder} that has dataset urn, partition, record count, previous publish timestamp * and dedupe status set. * The caller MUST set eventSubmitter, eventname before submitting. */ public static SlaEventSubmitterBuilder getEventSubmitterBuilder(Dataset dataset, Optional<Job> job, FileSystem fs) { SlaEventSubmitterBuilder builder = SlaEventSubmitter.builder().datasetUrn(dataset.getUrn()) .partition(dataset.jobProps().getProp(MRCompactor.COMPACTION_JOB_DEST_PARTITION, "")) .dedupeStatus(getOutputDedupeStatus(dataset.jobProps())); long previousPublishTime = getPreviousPublishTime(dataset, fs); long upstreamTime = dataset.jobProps().getPropAsLong(SlaEventKeys.UPSTREAM_TS_IN_MILLI_SECS_KEY, -1l); long recordCount = getRecordCount(job); // Previous publish only exists when this is a recompact job if (previousPublishTime != -1l) { builder.previousPublishTimestamp(Long.toString(previousPublishTime)); } // Upstream time is the logical time represented by the compaction input directory if (upstreamTime != -1l) { builder.upstreamTimestamp(Long.toString(upstreamTime)); } if (recordCount != -1l) { builder.recordCount(Long.toString(recordCount)); } return builder; } /** * {@link Deprecated} use {@link #getEventSubmitterBuilder(Dataset, Optional, FileSystem)} */ @Deprecated public static void populateState(Dataset dataset, Optional<Job> job, FileSystem fs) { dataset.jobProps().setProp(SlaEventKeys.DATASET_URN_KEY, dataset.getUrn()); dataset.jobProps().setProp(SlaEventKeys.PARTITION_KEY, dataset.jobProps().getProp(MRCompactor.COMPACTION_JOB_DEST_PARTITION, "")); dataset.jobProps().setProp(SlaEventKeys.DEDUPE_STATUS_KEY, getOutputDedupeStatus(dataset.jobProps())); dataset.jobProps().setProp(SlaEventKeys.PREVIOUS_PUBLISH_TS_IN_MILLI_SECS_KEY, getPreviousPublishTime(dataset, fs)); dataset.jobProps().setProp(SlaEventKeys.RECORD_COUNT_KEY, getRecordCount(job)); } public static void setUpstreamTimeStamp(State state, long time) { state.setProp(SlaEventKeys.UPSTREAM_TS_IN_MILLI_SECS_KEY, Long.toString(time)); } private static long getPreviousPublishTime(Dataset dataset, FileSystem fs) { Path compactionCompletePath = new Path(dataset.outputPath(), MRCompactor.COMPACTION_COMPLETE_FILE_NAME); try { return fs.getFileStatus(compactionCompletePath).getModificationTime(); } catch (IOException e) { LOG.debug("Failed to get previous publish time.", e); } return -1l; } private static String getOutputDedupeStatus(State state) { return state.getPropAsBoolean(MRCompactor.COMPACTION_OUTPUT_DEDUPLICATED, MRCompactor.DEFAULT_COMPACTION_OUTPUT_DEDUPLICATED) ? DedupeStatus.DEDUPED.toString() : DedupeStatus.NOT_DEDUPED.toString(); } private static long getRecordCount(Optional<Job> job) { if (!job.isPresent()) { return -1l; } Counters counters = null; try { counters = job.get().getCounters(); } catch (IOException e) { LOG.debug("Failed to get job counters. Record count will not be set. ", e); return -1l; } Counter recordCounter = counters.findCounter(AvroKeyDedupReducer.EVENT_COUNTER.RECORD_COUNT); if (recordCounter != null && recordCounter.getValue() != 0) { return recordCounter.getValue(); } recordCounter = counters.findCounter(AvroKeyMapper.EVENT_COUNTER.RECORD_COUNT); if (recordCounter != null && recordCounter.getValue() != 0) { return recordCounter.getValue(); } LOG.debug("Non zero record count not found in both mapper and reducer counters"); return -1l; } }