Example usage for com.mongodb DBCollection find

Introduction

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

Prototype

public DBCursor find(final DBObject query) 

Source Link

Document

Select documents in collection and get a cursor to the selected documents.

Usage

From source file:FollowingCnt.java

/**
 * Processes requests for both HTTP <code>GET</code> and <code>POST</code>
 * methods.//ww  w  .  j  ava 2s.com
 *
 * @param request servlet request
 * @param response servlet response
 * @throws ServletException if a servlet-specific error occurs
 * @throws IOException if an I/O error occurs
 */
protected void processRequest(HttpServletRequest request, HttpServletResponse response)
        throws ServletException, IOException {
    response.setContentType("text/html;charset=UTF-8");
    PrintWriter out = response.getWriter();
    String username = request.getParameter("username");

    try {
        MongoClient mongo = new MongoClient("localhost", 27017);
        DB db = mongo.getDB("test");
        System.out.println("Connection established");
        DBCollection User = db.getCollection("User");

        BasicDBObject query = new BasicDBObject("username", username);
        DBCursor curssc = User.find(query);
        ArrayList<String> e = new ArrayList();
        e = (ArrayList<String>) curssc.next().get("following_username");
        out.println(e.size());
    } catch (Exception e) {
        System.err.println(e.getClass().getName() + ": " + e.getMessage());
    }
}

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From source file:gMIRC_handler.java

/**
 * Add a user to a channel (can check if the channel is a new channel)
 *
 * @param Username//from w  w w  . ja  va  2s .  c o m
 * @param Channel
 * @return code
 */
private int AddChannel(String Username, String Channel) {
    int ret = 0;
    try {

        MongoClient mongoClient = new MongoClient();
        DB db = mongoClient.getDB("mirc");
        DBCollection coll = db.getCollection("channelCollection");
        BasicDBObject query = new BasicDBObject("username", Username).append("channel", Channel);

        DBCursor cursor = coll.find(query);

        try {
            if (cursor.hasNext()) {
                ret = 1;
                System.err.println(Username + " has joined Channel : " + Channel + "!");
            } else {
                query = new BasicDBObject("channel", Channel);
                DBCursor cursor2 = coll.find(query);
                try {
                    if (!cursor2.hasNext()) {
                        ret = 2;
                    }
                } finally {
                    cursor2.close();
                }
                BasicDBObject doc = new BasicDBObject("username", Username).append("channel", Channel);
                coll.insert(doc);
                System.out.println(Username + " joined Channel : " + Channel);
            }
        } finally {
            cursor.close();
        }

    } catch (UnknownHostException ex) {
        Logger.getLogger(gMIRC_handler.class.getName()).log(Level.SEVERE, null, ex);
    }
    return ret;
}

---

From source file:gMIRC_handler.java

/**
 * Delete a user from a channel (used in leave method)
 *
 * @param Channel/*from   w  w w .ja va 2s  .c o m*/
 * @param Username
 * @return code
 */
private int DeleteChannelUser(String Channel, String Username) {
    int ret = 0;
    try {

        MongoClient mongoClient = new MongoClient();
        DB db = mongoClient.getDB("mirc");
        DBCollection coll = db.getCollection("channelCollection");
        BasicDBObject query = new BasicDBObject("username", Username).append("channel", Channel);

        DBCursor cursor = coll.find(query);

        try {
            ret = 1;
            while (cursor.hasNext()) {
                ret = 1;
                coll.remove(cursor.next());
                ret = 0;
            }
        } finally {
            cursor.close();
        }

    } catch (UnknownHostException ex) {
        Logger.getLogger(gMIRC_handler.class.getName()).log(Level.SEVERE, null, ex);
    }
    System.out.println(Username + " has leaved Channel : " + Channel);
    return ret;
}

---

From source file:gMIRC_handler.java

/**
 * Delete a user in all channel (used in cleaning)
 *
 * @param Username/*from w w  w .  j  a  v a2 s  .co m*/
 * @return code
 */
public int DeleteUserInChannel(String Username) {
    int ret = 0;
    try {

        MongoClient mongoClient = new MongoClient();
        DB db = mongoClient.getDB("mirc");
        DBCollection coll = db.getCollection("channelCollection");
        BasicDBObject query = new BasicDBObject("username", Username);

        DBCursor cursor = coll.find(query);

        try {
            while (cursor.hasNext()) {
                coll.remove(cursor.next());
            }
        } finally {
            cursor.close();
        }

    } catch (UnknownHostException ex) {
        Logger.getLogger(gMIRC_handler.class.getName()).log(Level.SEVERE, null, ex);
    }
    System.out.println(Username + " has been deleted in Channel Collection!");
    return ret;
}

---

From source file:gMIRC_handler.java

/**
 * Register a user to the server (used in RegUser)
 *
 * @param username//from  w  w  w .j ava2s.c  o m
 * @return code
 */
private int AddUser(String username) {
    int ret = 0;
    try {

        MongoClient mongoClient = new MongoClient();
        DB db = mongoClient.getDB("mirc");
        DBCollection coll = db.getCollection("activeUser");
        BasicDBObject query = new BasicDBObject("username", username);

        DBCursor cursor = coll.find(query);

        try {
            if (cursor.hasNext()) {
                Date now = new Date();
                long timestamp_now = now.getTime();
                long treshold = timestamp_now - (1000 * 10); //10
                BasicDBObject temp = (BasicDBObject) cursor.next();
                Date time_temp = (Date) temp.get("timestamp");
                long timestamp_temp = time_temp.getTime();
                if (timestamp_temp < treshold) {
                    ret = 2;
                    System.out.println(username + " has joined back!");
                } else {
                    ret = 1;
                    System.err.println(username + " has been used !");
                }
            } else {
                java.util.Date date = new java.util.Date();
                BasicDBObject doc = new BasicDBObject("username", username).append("timestamp", date);
                coll.insert(doc);
                System.out.println(username + " online !");
            }
        } finally {
            cursor.close();
        }

    } catch (UnknownHostException ex) {
        Logger.getLogger(gMIRC_handler.class.getName()).log(Level.SEVERE, null, ex);
    }
    return ret;
}

---

From source file:gMIRC_handler.java

private int UpdateLastActive(String username) {
    int ret = 0;//from ww  w. j a va 2  s  .  c o m
    try {

        MongoClient mongoClient = new MongoClient();
        DB db = mongoClient.getDB("mirc");
        DBCollection coll = db.getCollection("activeUser");
        BasicDBObject query = new BasicDBObject("username", username);

        DBCursor cursor = coll.find(query);

        try {
            if (cursor.hasNext()) {
                DBObject temp = cursor.next();
                java.util.Date date = new java.util.Date();
                temp.put("timestamp", date);
                coll.save(temp);
            } else {
                java.util.Date date = new java.util.Date();
                BasicDBObject doc = new BasicDBObject("username", username).append("timestamp", date);
                coll.insert(doc);
                System.out.println(username + " online !");
            }
        } finally {
            cursor.close();
        }

    } catch (UnknownHostException ex) {
        Logger.getLogger(gMIRC_handler.class.getName()).log(Level.SEVERE, null, ex);
    }
    return 0;
}

---

From source file:gMIRC_handler.java

/**
 * Moved active user to a passive user (soon to be deleted)
 *
 * @param username// w w  w  . j  a  v a  2s.  c  o m
 * @return code
 */
public static int SoftDelete(String username) {
    int ret = 0;
    try {
        MongoClient mongoClient = new MongoClient();
        DB db = mongoClient.getDB("mirc");
        DBCollection coll = db.getCollection("activeUser");
        DBCollection coll2 = db.getCollection("passiveUser");
        BasicDBObject query = new BasicDBObject("username", username);

        DBCursor cursor = coll.find(query);

        try {
            if (cursor.hasNext()) {
                DBObject temp = cursor.next();
                coll2.insert(temp);
                coll.remove(temp);
            } else {
                ret = 1;
            }
        } finally {
            cursor.close();
        }
    } catch (UnknownHostException ex) {
        Logger.getLogger(gMIRC_handler.class.getName()).log(Level.SEVERE, null, ex);
    }
    return ret;
}

---

From source file:gMIRC_handler.java

public String GetMessage(String username) {
    String ret = "";
    try {//from  w  ww. j  av a2s  .  com
        MongoClient mongoClient = new MongoClient();
        DB db = mongoClient.getDB("mirc");
        DBCollection coll = db.getCollection("inbox");
        BasicDBObject query = new BasicDBObject("target", username);
        JSONObject obj = new JSONObject();
        JSONArray arr = new JSONArray();
        DBCursor cursor = coll.find(query);

        try {
            while (cursor.hasNext()) {
                BasicDBObject temp = (BasicDBObject) cursor.next();
                JSONObject sav = new JSONObject();
                sav.put("target", temp.getString("target"));
                sav.put("username", temp.getString("username"));
                sav.put("channel", temp.getString("channel"));
                sav.put("message", temp.getString("message"));
                sav.put("timestamp", temp.getLong("timestamp"));
                arr.add(sav);
                coll.remove(temp);
            }
            obj.put("msg", arr);
            ret = obj.toJSONString();
        } finally {
            cursor.close();
        }
    } catch (UnknownHostException ex) {
        Logger.getLogger(gMIRC_handler.class.getName()).log(Level.SEVERE, null, ex);
    }
    UpdateLastActive(username);
    return ret;
}

---

From source file:gMIRC_handler.java

private int PutMessage(String username, String channelname, String msg) {
    int ret = 0;//from w w w.  j a  v  a2s  .c o m
    try {
        MongoClient mongoClient = new MongoClient();
        DB db = mongoClient.getDB("mirc");
        DBCollection coll = db.getCollection("inbox");
        DBCollection coll2 = db.getCollection("channelCollection");
        BasicDBObject query2 = new BasicDBObject("channel", channelname);
        BasicDBObject query = new BasicDBObject("channel", channelname).append("username", username);
        DBCursor cursor = coll2.find(query);
        try {
            if (cursor.hasNext()) {
                DBCursor cursor2 = coll2.find(query2);
                System.out.println("Got message from " + username);
                try {
                    java.util.Date date = new java.util.Date();
                    while (cursor2.hasNext()) {
                        ret = 1;
                        BasicDBObject temp = (BasicDBObject) cursor2.next();
                        String target = temp.get("username").toString();
                        BasicDBObject put = new BasicDBObject("target", target).append("username", username)
                                .append("channel", channelname).append("message", msg)
                                .append("timestamp", date.getTime());
                        coll.insert(put);
                        ret = 0;
                    }
                } finally {
                    cursor2.close();
                }
            } else {
                ret = 2;
                System.out.println(username + " not registered to Channel : " + channelname);
            }
        } finally {
            cursor.close();
        }

    } catch (UnknownHostException ex) {
        ret = 1;
        Logger.getLogger(gMIRC_handler.class.getName()).log(Level.SEVERE, null, ex);
    }
    return ret;
}

---

From source file:gMIRC_handler.java

private int PutMessageWild(String username, String msg) {
    int ret = 1;//from   www.  j a  v  a 2  s. com

    try {
        MongoClient mongoClient = new MongoClient();
        DB db = mongoClient.getDB("mirc");
        DBCollection coll2 = db.getCollection("channelCollection");
        BasicDBObject query = new BasicDBObject("username", username);
        System.out.println("Wild message appear from " + username + " !");
        DBCursor cursor = coll2.find(query);
        try {
            while (cursor.hasNext()) {
                ret = 1;
                BasicDBObject temp = (BasicDBObject) cursor.next();
                String channelname = temp.getString("channel");
                ret = ret & PutMessage(username, channelname, msg);
            }
        } finally {
            cursor.close();
        }
    } catch (UnknownHostException ex) {
        Logger.getLogger(gMIRC_handler.class.getName()).log(Level.SEVERE, null, ex);
    }

    return ret;
}

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