Examples of com.mongodb.DBCollection.findAndModify()

com.mongodb.DBCollection.findAndModify()
Finds the first document in the query and updates it. @param query query to match @param fields fields to be returned @param sort sort to apply before picking first document @param remove if true, document found will be removed @param update update to apply @param returnNew if true, the updated document is returned, otherwise the old document is returned (or it would be lost forever) @param upsert do upsert (insert if document not present) @return the document

                query.and(Document.MOD_COUNT).is(modCount);
                DBObject fields = new BasicDBObject();
                // return _id only
                fields.put("_id", 1);


                DBObject oldNode = dbCollection.findAndModify(query.get(), fields,
                        null /*sort*/, false /*remove*/, update, false /*returnNew*/,
                        false /*upsert*/);
                if (oldNode != null) {
                    // success, update cached document
                    applyToCache(collection, cachedDoc, updateOp);

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            }


            // conditional update failed or not possible
            // perform operation and get complete document
            QueryBuilder query = createQueryForUpdate(updateOp, checkConditions);
            DBObject oldNode = dbCollection.findAndModify(query.get(), null,
                    null /*sort*/, false /*remove*/, update, false /*returnNew*/,
                    upsert);
            if (checkConditions && oldNode == null) {
                return null;
            }

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                query.and(Document.MOD_COUNT).is(modCount);
                DBObject fields = new BasicDBObject();
                // return _id only
                fields.put("_id", 1);


                DBObject oldNode = dbCollection.findAndModify(query.get(), fields,
                        null /*sort*/, false /*remove*/, update, false /*returnNew*/,
                        false /*upsert*/);
                if (oldNode != null) {
                    // success, update cached document
                    applyToCache(collection, cachedDoc, updateOp);

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            }


            // conditional update failed or not possible
            // perform operation and get complete document
            QueryBuilder query = createQueryForUpdate(updateOp, checkConditions);
            DBObject oldNode = dbCollection.findAndModify(query.get(), null,
                    null /*sort*/, false /*remove*/, update, false /*returnNew*/,
                    upsert);
            if (checkConditions && oldNode == null) {
                return null;
            }

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        //         WriteConcern.SAFE);
        // return null;


        long start = start();
        try {
            DBObject oldNode = dbCollection.findAndModify(query.get(), null /*fields*/,
                    null /*sort*/, false /*remove*/, update, false /*returnNew*/,
                    upsert /*upsert*/);
            if (checkConditions && oldNode == null) {
                return null;
            }

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        if (LOG.isTraceEnabled()) {
            LOG.trace("Executing findAndModify(" + dbColl.getName() + ") with delete ...");
        }


        final DBObject result = dbColl.findAndModify(qi.getQueryObject(),
                                                     qi.getFieldsObject(),
                                                     qi.getSortObject(),
                                                     true,
                                                     null,
                                                     false,

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        if (LOG.isTraceEnabled()) {
            LOG.info("Executing findAndModify(" + dbColl.getName() + ") with update ");
        }
        DBObject res = null;
        try {
            res = dbColl.findAndModify(qi.getQueryObject(),
                                       qi.getFieldsObject(),
                                       qi.getSortObject(),
                                       false,
                                       ((UpdateOpsImpl<T>) ops).getOps(),
                                       !oldVersion,

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      // 转换...
      DBObject query = moe.formatObject(q);
      DBObject update = moe.formatObject(o);
      DBObject sort = null == mcur ? Mongos.dbo() : moe.formatObject(mcur.toMap());


      DBObject dbo = coll.findAndModify(query, sort, update);


      return moe.toObject(dbo);
    }
    return null;
  }

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