Examples with HoodieAccumulator org.apache.hudi.common.data.HoodieAccumulator used on opensource projects

Example 1 with HoodieAccumulator

use of org.apache.hudi.common.data.HoodieAccumulator in project hudi by apache.

the class HoodieCompactor method generateCompactionPlan.

/**
 * Generate a new compaction plan for scheduling.
 *
 * @param context                               HoodieEngineContext
 * @param hoodieTable                           Hoodie Table
 * @param config                                Hoodie Write Configuration
 * @param compactionCommitTime                  scheduled compaction commit time
 * @param fgIdsInPendingCompactionAndClustering partition-fileId pairs for which compaction is pending
 * @return Compaction Plan
 * @throws IOException when encountering errors
 */
HoodieCompactionPlan generateCompactionPlan(HoodieEngineContext context, HoodieTable<T, I, K, O> hoodieTable, HoodieWriteConfig config, String compactionCommitTime, Set<HoodieFileGroupId> fgIdsInPendingCompactionAndClustering) throws IOException {
    // Accumulator to keep track of total log files for a table
    HoodieAccumulator totalLogFiles = context.newAccumulator();
    // Accumulator to keep track of total log file slices for a table
    HoodieAccumulator totalFileSlices = context.newAccumulator();
    ValidationUtils.checkArgument(hoodieTable.getMetaClient().getTableType() == HoodieTableType.MERGE_ON_READ, "Can only compact table of type " + HoodieTableType.MERGE_ON_READ + " and not " + hoodieTable.getMetaClient().getTableType().name());
    // TODO : check if maxMemory is not greater than JVM or executor memory
    // TODO - rollback any compactions in flight
    HoodieTableMetaClient metaClient = hoodieTable.getMetaClient();
    LOG.info("Compacting " + metaClient.getBasePath() + " with commit " + compactionCommitTime);
    List<String> partitionPaths = FSUtils.getAllPartitionPaths(context, config.getMetadataConfig(), metaClient.getBasePath());
    // filter the partition paths if needed to reduce list status
    partitionPaths = config.getCompactionStrategy().filterPartitionPaths(config, partitionPaths);
    if (partitionPaths.isEmpty()) {
        // In case no partitions could be picked, return no compaction plan
        return null;
    }
    SliceView fileSystemView = hoodieTable.getSliceView();
    LOG.info("Compaction looking for files to compact in " + partitionPaths + " partitions");
    context.setJobStatus(this.getClass().getSimpleName(), "Looking for files to compact");
    List<HoodieCompactionOperation> operations = context.flatMap(partitionPaths, partitionPath -> fileSystemView.getLatestFileSlices(partitionPath).filter(slice -> !fgIdsInPendingCompactionAndClustering.contains(slice.getFileGroupId())).map(s -> {
        List<HoodieLogFile> logFiles = s.getLogFiles().sorted(HoodieLogFile.getLogFileComparator()).collect(toList());
        totalLogFiles.add(logFiles.size());
        totalFileSlices.add(1L);
        // Avro generated classes are not inheriting Serializable. Using CompactionOperation POJO
        // for Map operations and collecting them finally in Avro generated classes for storing
        // into meta files.
        Option<HoodieBaseFile> dataFile = s.getBaseFile();
        return new CompactionOperation(dataFile, partitionPath, logFiles, config.getCompactionStrategy().captureMetrics(config, s));
    }).filter(c -> !c.getDeltaFileNames().isEmpty()), partitionPaths.size()).stream().map(CompactionUtils::buildHoodieCompactionOperation).collect(toList());
    LOG.info("Total of " + operations.size() + " compactions are retrieved");
    LOG.info("Total number of latest files slices " + totalFileSlices.value());
    LOG.info("Total number of log files " + totalLogFiles.value());
    LOG.info("Total number of file slices " + totalFileSlices.value());
    // Filter the compactions with the passed in filter. This lets us choose most effective
    // compactions only
    HoodieCompactionPlan compactionPlan = config.getCompactionStrategy().generateCompactionPlan(config, operations, CompactionUtils.getAllPendingCompactionPlans(metaClient).stream().map(Pair::getValue).collect(toList()));
    ValidationUtils.checkArgument(compactionPlan.getOperations().stream().noneMatch(op -> fgIdsInPendingCompactionAndClustering.contains(new HoodieFileGroupId(op.getPartitionPath(), op.getFileId()))), "Bad Compaction Plan. FileId MUST NOT have multiple pending compactions. " + "Please fix your strategy implementation. FileIdsWithPendingCompactions :" + fgIdsInPendingCompactionAndClustering + ", Selected workload :" + compactionPlan);
    if (compactionPlan.getOperations().isEmpty()) {
        LOG.warn("After filtering, Nothing to compact for " + metaClient.getBasePath());
    }
    return compactionPlan;
}