Example usage for com.mongodb WriteConcern UNACKNOWLEDGED

Introduction

In this page you can find the example usage for com.mongodb WriteConcern UNACKNOWLEDGED.

Prototype

WriteConcern UNACKNOWLEDGED

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Document

Write operations that use this write concern will return as soon as the message is written to the socket.

Usage

From source file:org.semispace.semimeter.dao.mongo.SemiMeterDaoMongo.java

License:Apache License

private void deleteOldMinutes(long before24h, long before180min, long before15min) {
    Calendar cal = new GregorianCalendar();
    cal.setTimeInMillis(before24h);//from  w  w w  .j av a2s.  c  o  m
    cal.set(Calendar.MILLISECOND, 0);
    cal.set(Calendar.SECOND, 0);
    cal.set(Calendar.MINUTE, 0);
    long targetHour = cal.getTimeInMillis();

    DBCollection meterCollection = mongoTemplate.getCollection("meter");
    DBCursor result = meterCollection.find(new BasicDBObject(), new BasicDBObject("_id", 1));
    while (result.hasNext()) {
        DBObject doc = result.next();

        try {
            //start a new "session" for each document. not sure if this actually helps anything consistency-wise
            meterCollection.getDB().requestStart();

            //and fetch actual object (result only contains _id's)
            doc = meterCollection.findOne(doc); // TODO Double check

            log.trace("cleaning document : {}", doc);
            DBObject day = (DBObject) doc.get("day");
            //log.trace("day: {}", day);
            DBObject hours = (DBObject) day.get("hours");
            //log.trace("hours: {}", hours);
            Set<String> hrSet = new HashSet<String>();
            hrSet.addAll(hours.keySet());
            boolean docChanged = false;

            if (hrSet.isEmpty()) {
                log.trace("no hours in document, remove it: {}", doc);
                meterCollection.remove(new BasicDBObject("_id", doc.get("_id")), WriteConcern.UNACKNOWLEDGED);
            } else {
                for (String h : hrSet) {
                    long hourmillis = Long.valueOf(h);
                    log.trace("checking hour: {}", hourmillis);
                    if (hourmillis < targetHour) {
                        if (log.isTraceEnabled()) {
                            log.trace("removing hour " + h + " because it is older than target" + targetHour);
                        }
                        docChanged = true;
                        DBObject obj = (DBObject) hours.get(h);
                        day.put("count", (Integer) day.get("count") - (Integer) obj.get("count"));
                        hours.removeField(h);
                    } else if (hourmillis == targetHour) {
                        log.trace("current hour is targetHour, check minutes");
                        DBObject currentHour = (DBObject) hours.get(h);
                        DBObject minutes = (DBObject) currentHour.get("minutes");
                        Set<String> keys = new HashSet<String>();
                        keys.addAll(minutes.keySet());
                        for (String m : keys) {
                            long minutemillis = Long.valueOf(m);
                            log.trace("checking minute: {}", minutemillis);
                            if (minutemillis < before24h) {
                                if (log.isTraceEnabled()) {
                                    log.trace("removing minute " + minutemillis + " because it is older than "
                                            + before24h);
                                }

                                docChanged = true;
                                DBObject obj = (DBObject) minutes.get(m);
                                DBObject hourObj = (DBObject) hours.get(h);
                                day.put("count", (Integer) day.get("count") - (Integer) obj.get("count"));
                                hourObj.put("count",
                                        (Integer) hourObj.get("count") - (Integer) obj.get("count"));
                                minutes.removeField(m);
                            }
                        }
                        if (minutes.keySet().isEmpty()) {
                            log.trace("no more minutes, removing hour {}", h);
                            hours.removeField(h);
                            docChanged = true;
                        }
                    }
                }
            }

            docChanged |= updateTrendCounters(doc, before180min, before15min);

            if (docChanged) {
                meterCollection.save(doc);
            }
        } finally {
            meterCollection.getDB().requestDone();
        }
    }
}

From source file:org.semispace.semimeter.dao.mongo.SemiMeterDaoMongo.java

License:Apache License

private void deleteOldSums(long when) {
    DBCollection sumsCollection = mongoTemplate.getCollection("sums");
    DBCursor result = sumsCollection.find((DBObject) JSON.parse("{'time.ts': {'$lt': " + when + "}}"));

    while (result.hasNext()) {
        sumsCollection.remove(result.next(), WriteConcern.UNACKNOWLEDGED);
    }/*from   w  w w.j av  a 2  s.c  o m*/
}