Examples of com.mongodb.DBCollection.find()

com.mongodb.DBCollection.find()
Calls {@link DBCollection#find(com.mongodb.DBObject,com.mongodb.DBObject,int,int)} and applies the query options @param query query used to search @param fields the fields of matching objects to return @param numToSkip number of objects to skip @param batchSize the batch size. This option has a complex behavior, see {@link DBCursor#batchSize(int) } @param options - see Bytes QUERYOPTION_ @return the cursor @throws MongoException @dochub find


  }


  public java.util.List<DBObject> LastMessages() {
    DBCollection messagesCollection = chatDatabase.getCollection("historymessages");
    java.util.List<DBObject> messages = messagesCollection.find().toArray();


    for (int i = 0; i < messages.size(); i++) {
      System.out.println(messages.get(i));
    }

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  }


  @Override
  public List<Message> getLastMessages() {
    DBCollection messagesCollection = chatDatabase.getCollection("historymessages");
    DBCursor curs = messagesCollection.find();


    List<Message> messages = new ArrayList<>();
    while (curs.hasNext()) {
      DBObject o = curs.next();
      String test = o.get("message").toString();

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  public void onlyTenMessages() {
    DBCollection messagesCollection = chatDatabase.getCollection("historymessages");
    long nbMessages = messagesCollection.count();
    while (nbMessages > 10) {
      // enregistrement le plus vieux
      DBCursor oldestMessage = messagesCollection.find().sort(new BasicDBObject("date", 1)).limit(1);
      messagesCollection.remove(oldestMessage.next());
      nbMessages = messagesCollection.count();
    }


  }

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    MessagesHistoryMongo conect = new MessagesHistoryMongo();


    DBCollection messagesCollection = chatDatabase.getCollection("historymessages");
    
    Long numberOfMessages = messagesCollection.count();
    DBCursor curs = messagesCollection.find();
    List<Message> messages = new ArrayList<>();
    while (curs.hasNext()) {
      DBObject o = curs.next();
      String test=o.get("message").toString();
      Gson gson = new Gson();

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    conect.saveMessage(message11);
    Long numberOfMessagesNew = messagesCollection.count();
    Assert.assertEquals(new Long(10), numberOfMessagesNew);
    
    DBCursor cursNew = messagesCollection.find();
    List<Message> messagesNew = new ArrayList<>();
    while (cursNew.hasNext()) {
      DBObject o = cursNew.next();
      String objectMessageNew=o.get("message").toString();
      Gson gson = new Gson();

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        23, 45, 432, 7765, 432, 75, 213, 6543, 432, 7576, 1321, 6546, 4234, 657, 42132, 675, 432, 654, 4232,
        543 });
    // 根据userId in('10010171','10010172')查询
    DBObject in_query = new BasicDBObject();
    in_query.put("actionerId", in_data);
    DBCursor inQueryResult = collection.find(in_query);
    // System.out.println("按in条件查询结果：");
    for (Iterator<DBObject> iter = inQueryResult.iterator(); iter.hasNext();) {
      // System.out.println(iter.next());
      iter.next();
    }

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     * @param jobExecutionId if null, retrieves all StepExecutions; otherwise, retrieves all StepExecutions belongs to the JobExecution id
     * @return a list of StepExecutions
     */
    List<StepExecution> selectStepExecutions(final Long jobExecutionId) {
        final DBCollection collection = db.getCollection(TableColumns.STEP_EXECUTION);
        DBCursor cursor = jobExecutionId == null ? collection.find() :
                collection.find(new BasicDBObject(TableColumns.JOBEXECUTIONID, jobExecutionId));
        cursor = cursor.sort(new BasicDBObject(TableColumns.STEPEXECUTIONID, 1));
        final List<StepExecution> result = new ArrayList<StepExecution>();
        createStepExecutionsFromDBCursor(cursor, result);
        return result;

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     * @return a list of StepExecutions
     */
    List<StepExecution> selectStepExecutions(final Long jobExecutionId) {
        final DBCollection collection = db.getCollection(TableColumns.STEP_EXECUTION);
        DBCursor cursor = jobExecutionId == null ? collection.find() :
                collection.find(new BasicDBObject(TableColumns.JOBEXECUTIONID, jobExecutionId));
        cursor = cursor.sort(new BasicDBObject(TableColumns.STEPEXECUTIONID, 1));
        final List<StepExecution> result = new ArrayList<StepExecution>();
        createStepExecutionsFromDBCursor(cursor, result);
        return result;
    }

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      BasicDBObject fields = new BasicDBObject();
      fields.put("_id", -1);
      fields.append("k", 1);
      fields.append("v", 1);
      if (batchSize != null)
        cursor = dbCollection.find(query, fields).batchSize(batchSize);
      else
        cursor = dbCollection.find(query, fields);


      if (batchListener != null)
        batchListener.afterFetchingNextBatch(cursor.count());

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      fields.append("k", 1);
      fields.append("v", 1);
      if (batchSize != null)
        cursor = dbCollection.find(query, fields).batchSize(batchSize);
      else
        cursor = dbCollection.find(query, fields);


      if (batchListener != null)
        batchListener.afterFetchingNextBatch(cursor.count());
      
      List<DBObject> finalRes = new ArrayList<DBObject>();

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