Example usage for org.springframework.data.mongodb.core.mapreduce MapReduceResults getCounts

Introduction

In this page you can find the example usage for org.springframework.data.mongodb.core.mapreduce MapReduceResults getCounts.

Prototype

public MapReduceCounts getCounts() 

Source Link

Usage

From source file:io.github.microcks.repository.DailyStatisticRepositoryImpl.java

@Override
public DailyStatistic aggregateDailyStatistics(String day) {

    // Build a query to pre-select the statistics that will be aggregated.
    Query query = new Query(Criteria.where("day").is(day));

    // Execute a MapReduce command.
    MapReduceResults<WrappedDailyStatistic> results = template.mapReduce(query, "dailyStatistic",
            "classpath:mapDailyStatisticForADay.js", "classpath:reduceDailyStatisticForADay.js",
            WrappedDailyStatistic.class);

    // Output some debug messages.
    if (log.isDebugEnabled()) {
        log.debug("aggregateDailyStatistics mapReduce for day " + day);
        log.debug("aggregateDailyStatistics mapReduce result counts: " + results.getCounts());
        for (WrappedDailyStatistic wdt : results) {
            log.debug("aggregateDailyStatistics mapReduce result value: " + wdt.getValue());
        }// w ww .j  a  v a  2  s.  c o m
    }

    // We've got a result if we've got an output.
    if (results.getCounts().getOutputCount() > 0) {
        return results.iterator().next().getValue();
    }

    // Build and return an empty object otherwise?
    DailyStatistic statistic = new DailyStatistic();
    statistic.setDay(day);
    statistic.setDailyCount(0);
    return statistic;
}

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