Example usage for com.mongodb.client MongoCursor next

Introduction

In this page you can find the example usage for com.mongodb.client MongoCursor next.

Prototype

@Override
    TResult next();

Source Link

Usage

From source file:org.restcom.stats.core.service.GaugeService.java

License:Open Source License

public List<GaugeDTO> retrieveSumMetrics(long fromTime, long toTime, String key) {
    List<GaugeDTO> gauges = new ArrayList<>();

    //create params list
    List<Bson> params = new ArrayList<>();

    //define match criteria
    params.add(new Document("$match", new Document("timestamp", new Document("$gte", fromTime))));
    params.add(new Document("$match", new Document("timestamp", new Document("$lte", toTime))));
    params.add(new Document("$match", new Document("key", key)));

    //define grouping criteria
    params.add(new Document("$group",
            new Document("_id", "null").append("totalCount", new Document("$sum", "$count"))));

    //exec query/*  w  ww .jav a 2 s . c o m*/
    MongoCursor<Document> result = dbm.getCollection(MetricType.GAUGE.getCollectionName()).aggregate(params)
            .iterator();

    //convert document result into dto
    while (result.hasNext()) {
        Document statsDoc = result.next();
        gauges.add(new GaugeDTO(toTime, statsDoc.getInteger("totalCount")));
    }

    return gauges;
}

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From source file:org.restcom.stats.core.service.HistogramService.java

License:Open Source License

public List<HistogramDTO> retrieveMetrics(long fromTime, long toTime, String key) {
    List<HistogramDTO> histograms = new ArrayList<>();

    //create params list
    List<Bson> params = new ArrayList<>();

    //define match criteria
    params.add(new Document("$match", new Document("timestamp", new Document("$gte", fromTime))));
    params.add(new Document("$match", new Document("timestamp", new Document("$lte", toTime))));
    params.add(new Document("$match", new Document("key", key)));

    //define grouping criteria
    params.add(new Document("$group",
            new Document("_id", "$timestamp").append("totalCount", new Document("$sum", "$count"))));
    //define order criteria
    params.add(new Document("$sort", new Document("_id", 1)));

    //exec query/*from w w w.  j  av a  2s. c o  m*/
    MongoCursor<Document> result = dbm.getCollection(MetricType.HISTOGRAM.getCollectionName()).aggregate(params)
            .iterator();

    //convert document result into dto
    while (result.hasNext()) {
        Document statsDoc = result.next();
        histograms.add(new HistogramDTO(statsDoc.getLong("_id"), statsDoc.getInteger("totalCount")));
    }

    return histograms;
}

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From source file:org.restcom.stats.core.service.HistogramService.java

License:Open Source License

public List<HistogramDTO> retrieveSumMetrics(long fromTime, long toTime, String key) {
    List<HistogramDTO> histograms = new ArrayList<>();

    //create params list
    List<Bson> params = new ArrayList<>();

    //define match criteria
    params.add(new Document("$match", new Document("timestamp", new Document("$gte", fromTime))));
    params.add(new Document("$match", new Document("timestamp", new Document("$lte", toTime))));
    params.add(new Document("$match", new Document("key", key)));

    //define grouping criteria
    params.add(new Document("$group",
            new Document("_id", "null").append("totalCount", new Document("$sum", "$count"))));

    //exec query//w  ww. ja v a  2 s  .  co m
    MongoCursor<Document> result = dbm.getCollection(MetricType.HISTOGRAM.getCollectionName()).aggregate(params)
            .iterator();

    //convert document result into dto
    while (result.hasNext()) {
        Document statsDoc = result.next();
        histograms.add(new HistogramDTO(toTime, statsDoc.getInteger("totalCount")));
    }

    return histograms;
}

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From source file:org.restcom.stats.core.service.MeterService.java

License:Open Source License

public List<MeterDTO> retrieveMetrics(long fromTime, long toTime, String key) {
    List<MeterDTO> meters = new ArrayList<>();

    //create params list
    List<Bson> params = new ArrayList<>();

    //define match criteria
    params.add(new Document("$match", new Document("timestamp", new Document("$gte", fromTime))));
    params.add(new Document("$match", new Document("timestamp", new Document("$lte", toTime))));
    params.add(new Document("$match", new Document("key", key)));

    //define grouping criteria
    params.add(new Document("$group",
            new Document("_id", "$timestamp").append("totalCount", new Document("$sum", "$count"))));
    //define order criteria
    params.add(new Document("$sort", new Document("_id", 1)));

    //exec query/*from www  .j a va 2s .  co m*/
    MongoCursor<Document> result = dbm.getCollection(MetricType.METER.getCollectionName()).aggregate(params)
            .iterator();

    //convert document result into dto
    while (result.hasNext()) {
        Document statsDoc = result.next();
        meters.add(new MeterDTO(statsDoc.getLong("_id"), statsDoc.getInteger("totalCount")));
    }

    return meters;
}

---

From source file:org.restcom.stats.core.service.MeterService.java

License:Open Source License

public List<MeterDTO> retrieveSumMetrics(long fromTime, long toTime, String key) {
    List<MeterDTO> meters = new ArrayList<>();

    //create params list
    List<Bson> params = new ArrayList<>();

    //define match criteria
    params.add(new Document("$match", new Document("timestamp", new Document("$gte", fromTime))));
    params.add(new Document("$match", new Document("timestamp", new Document("$lte", toTime))));
    params.add(new Document("$match", new Document("key", key)));

    //define grouping criteria
    params.add(new Document("$group",
            new Document("_id", "null").append("totalCount", new Document("$sum", "$count"))));

    //exec query// w  w w. java2  s. com
    MongoCursor<Document> result = dbm.getCollection(MetricType.METER.getCollectionName()).aggregate(params)
            .iterator();

    //convert document result into dto
    while (result.hasNext()) {
        Document statsDoc = result.next();
        meters.add(new MeterDTO(toTime, statsDoc.getInteger("totalCount")));
    }

    return meters;
}

---

From source file:org.restcom.stats.core.service.MetricEventService.java

License:Open Source License

/**
 * Retrieve metric status from interval timestamps.
 * @param fromTime timestamp from./*from   w w w.jav a2 s  . c o  m*/
 * @param toTime timestemp to.
 * @param metricType Metric type.
 * @return metric status.
 */
public MetricStatusDTO restrieveStatus(long fromTime, long toTime, MetricType metricType) {
    MetricStatusDTO status = new MetricStatusDTO();

    //create params list
    List<Bson> params = new ArrayList<>();

    //define match criteria
    params.add(new Document("$match", new Document("timestamp", new Document("$gte", fromTime))));
    params.add(new Document("$match", new Document("timestamp", new Document("$lte", toTime))));

    //define grouping criteria
    params.add(
            new Document("$group", new Document("_id", "status").append("totalEvents", new Document("$sum", 1))
                    .append("lastEvent", new Document("$max", "$timestamp"))));
    //exec query
    MongoCursor<Document> result = dbm.getCollection(metricType.getCollectionName()).aggregate(params)
            .iterator();

    //convert document result into dto
    if (result.hasNext()) {
        Document statsDoc = result.next();
        status.setTotalEvents(statsDoc.getInteger("totalEvents"));
        status.setTimestamp(new Date(statsDoc.getLong("lastEvent")));
    }

    return status;
}

---

From source file:org.restcom.stats.core.service.MetricEventService.java

License:Open Source License

/**
 * Retrieve metric keys./*from   w  w  w .  j a va 2 s. c  om*/
 * @param metricType Metric type.
 * @return metric keys.
 */
public List<String> retrieveMetricKeys(MetricType metricType) {
    List<String> keys = new ArrayList<>();

    //retrieve disctinct key values
    MongoCursor<String> result = dbm.getCollection(metricType.getCollectionName()).distinct("key", String.class)
            .iterator();

    while (result.hasNext()) {
        keys.add(result.next());
    }

    return keys;
}

---

From source file:org.restcom.stats.core.service.TimerService.java

License:Open Source License

public List<TimerDTO> retrieveMetrics(long fromTime, long toTime, String key) {
    List<TimerDTO> timers = new ArrayList<>();

    //create params list
    List<Bson> params = new ArrayList<>();

    //define match criteria
    params.add(new Document("$match", new Document("timestamp", new Document("$gte", fromTime))));
    params.add(new Document("$match", new Document("timestamp", new Document("$lte", toTime))));
    params.add(new Document("$match", new Document("key", key)));

    //define grouping criteria
    params.add(new Document("$group",
            new Document("_id", "$timestamp").append("totalCount", new Document("$sum", "$count"))));
    //define order criteria
    params.add(new Document("$sort", new Document("_id", 1)));

    //exec query/*w w  w  .ja  v  a 2 s  .  c  om*/
    MongoCursor<Document> result = dbm.getCollection(MetricType.TIMER.getCollectionName()).aggregate(params)
            .iterator();

    //convert document result into dto
    while (result.hasNext()) {
        Document statsDoc = result.next();
        timers.add(new TimerDTO(statsDoc.getLong("_id"), statsDoc.getInteger("totalCount")));
    }

    return timers;
}

---

From source file:org.restcom.stats.core.service.TimerService.java

License:Open Source License

public List<TimerDTO> retrieveSumMetrics(long fromTime, long toTime, String key) {
    List<TimerDTO> timers = new ArrayList<>();

    //create params list
    List<Bson> params = new ArrayList<>();

    //define match criteria
    params.add(new Document("$match", new Document("timestamp", new Document("$gte", fromTime))));
    params.add(new Document("$match", new Document("timestamp", new Document("$lte", toTime))));
    params.add(new Document("$match", new Document("key", key)));

    //define grouping criteria
    params.add(new Document("$group",
            new Document("_id", "null").append("totalCount", new Document("$sum", "$count"))));

    //exec query/*w  w  w.  jav  a2 s  .c o  m*/
    MongoCursor<Document> result = dbm.getCollection(MetricType.TIMER.getCollectionName()).aggregate(params)
            .iterator();

    //convert document result into dto
    while (result.hasNext()) {
        Document statsDoc = result.next();
        timers.add(new TimerDTO(toTime, statsDoc.getInteger("totalCount")));
    }

    return timers;
}

---

From source file:org.restheart.db.CollectionDAO.java

License:Open Source License

ArrayList<BsonDocument> getCollectionData(final MongoCollection<BsonDocument> coll, final int page,
        final int pagesize, final BsonDocument sortBy, final BsonDocument filters, final BsonDocument keys,
        CursorPool.EAGER_CURSOR_ALLOCATION_POLICY eager) throws JSONParseException {

    ArrayList<BsonDocument> ret = new ArrayList<>();

    int toskip = pagesize * (page - 1);

    SkippedFindIterable _cursor = null;/* w  w w  .  j  av  a2  s  .  c  o m*/

    if (eager != CursorPool.EAGER_CURSOR_ALLOCATION_POLICY.NONE) {

        _cursor = CursorPool.getInstance().get(new CursorPoolEntryKey(coll, sortBy, filters, keys, toskip, 0),
                eager);
    }

    int _pagesize = pagesize;

    // in case there is not cursor in the pool to reuse
    FindIterable<BsonDocument> cursor;

    if (_cursor == null) {
        cursor = getFindIterable(coll, sortBy, filters, keys);
        cursor.skip(toskip);

        MongoCursor<BsonDocument> mc = cursor.iterator();

        while (_pagesize > 0 && mc.hasNext()) {
            ret.add(mc.next());
            _pagesize--;
        }
    } else {
        int alreadySkipped;

        cursor = _cursor.getFindIterable();
        alreadySkipped = _cursor.getAlreadySkipped();

        long startSkipping = 0;
        int cursorSkips = alreadySkipped;

        if (LOGGER.isDebugEnabled()) {
            startSkipping = System.currentTimeMillis();
        }

        LOGGER.debug("got cursor from pool with skips {}. " + "need to reach {} skips.", alreadySkipped,
                toskip);

        MongoCursor<BsonDocument> mc = cursor.iterator();

        while (toskip > alreadySkipped && mc.hasNext()) {
            mc.next();
            alreadySkipped++;
        }

        if (LOGGER.isDebugEnabled()) {
            LOGGER.debug("skipping {} times took {} msecs", toskip - cursorSkips,
                    System.currentTimeMillis() - startSkipping);
        }

        while (_pagesize > 0 && mc.hasNext()) {
            ret.add(mc.next());
            _pagesize--;
        }
    }

    // the pool is populated here because, skipping with cursor.next() is heavy operation
    // and we want to minimize the chances that pool cursors are allocated in parallel
    CursorPool.getInstance().populateCache(new CursorPoolEntryKey(coll, sortBy, filters, keys, toskip, 0),
            eager);

    return ret;
}

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