Examples of com.mongodb.Mongo

com.mongodb.Mongo
ongodb.org/display/DOCS/Java+Driver+Concurrency
Connecting to a Replica Pair

You can connect to a replica pair using the Java driver by passing two DBAddresses to the Mongo constructor. For example:
```
 DBAddress left = new DBAddress("127.0.0.1:27017/test"); DBAddress right = new DBAddress("127.0.0.1:27018/test"); Mongo mongo = new Mongo(left, right); 
```
If the master of a replica pair goes down, there will be a brief lag before the slave becomes master. Thus, your application should be prepared to catch the exceptions that might be thrown in such a case: IllegalArgumentException, MongoException, and MongoException.Network (depending on when the connection drops).

Once the slave becomes master, the driver will begin using that connection as the master connection and the exceptions will stop being thrown.

Connecting to a Replica Set

You can connect to a replica set using the Java driver by passing several a list if ServerAddress to the Mongo constructor. For example:
```
 List addrs = new ArrayList(); addrs.add( new ServerAddress( "127.0.0.1" , 27017 ) ); addrs.add( new ServerAddress( "127.0.0.1" , 27018 ) ); addrs.add( new ServerAddress( "127.0.0.1" , 27019 ) ); Mongo mongo = new Mongo( addrs ); 
```
By default, all read and write operations will be made on the master. But it's possible to read from the slave(s) by using slaveOk:
```
 mongo.slaveOk(); 
```

  public static DB connectDB(String hostname, int port, String dbName)
      throws DBException
  {
    try
    {
      Mongo m = new Mongo(hostname, port);


      DB db = m.getDB(dbName);
      db.setWriteConcern(WriteConcern.FSYNC_SAFE);


      //boolean auth = db.authenticate(myUserName, myPassword);
      return db;
    }

View Full Code Here


    /**
     * Should access a singleton of type Mongo
     */
    protected Endpoint createEndpoint(String uri, String remaining, Map<String, Object> parameters) throws Exception {
        Mongo db = CamelContextHelper.mandatoryLookup(getCamelContext(), remaining, Mongo.class);


        Endpoint endpoint = new MongoDbEndpoint(uri, this);
        parameters.put("mongoConnection", db);
        setProperties(endpoint, parameters);

View Full Code Here

    private DBCollection nodesStore;
    private DBCollection settingsStore;


    NodeMapInMongoDb(String dir) {
        try {
            con = new Mongo();
            db = con.getDB(DB);
            db.setWriteConcern(WriteConcern.SAFE);
            nodesStore = db.getCollection(NODES_COLLECTION);
            nodesStore.ensureIndex(
                    new BasicDBObject(KEY_FIELD, 1),

View Full Code Here

    @Override
    public String check() throws ManifoldCFException {
        try {
            getSession();
            if (session != null) {
                Mongo currentMongoSession = session.getMongo();
                DBTCPConnector currentTCPConnection = currentMongoSession.getConnector();
                boolean status = currentTCPConnection.isOpen();
                if (status) {
                    session.getMongo().close();
                    session = null;
                    return super.check();

View Full Code Here

    @Override
    public boolean isConnected() {
        if (session == null) {
            return false;
        }
        Mongo currentMongoSession = session.getMongo();
        DBTCPConnector currentTCPConnection = currentMongoSession.getConnector();
        return currentTCPConnection.isOpen();
    }

View Full Code Here

  private void buildModel() throws UnknownHostException {
    userIsObject = false;
    itemIsObject = false;
    idCounter = 0;
    preferenceIsString = true;
    Mongo mongoDDBB = new Mongo(mongoHost, mongoPort);
    DB db = mongoDDBB.getDB(mongoDB);
    mongoTimestamp = new Date(0);
    FastByIDMap<Collection<Preference>> userIDPrefMap = new FastByIDMap<Collection<Preference>>();
    if (!mongoAuth || db.authenticate(mongoUsername, mongoPassword.toCharArray())) {
      collection = db.getCollection(mongoCollection);
      collectionMap = db.getCollection(mongoMapCollection);

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    if (this.connection != null)
    {
      disconnect();
    }
    
    this.connection = new Mongo(URL, port);
  }

View Full Code Here

    logger = Logger.getLogger(FeedCollections.class);
  }


  public static void open() throws Exception {
    try {
      Mongo conn = new Mongo(HOST, PORT);
      db = conn.getDB(DB_NAME);


      logger.debug("与Feed数据库" + DB_NAME + "尝试连接");


      boolean loginSuccess = db.authenticate(USER, PASSWORD.toCharArray());
      if (loginSuccess) {//将其改为if (loginSuccess==false) {

View Full Code Here

  
  @Test
   public  void initTest() throws Exception{   
          try {   
            long beginTime=System.currentTimeMillis(); 
              Mongo conn=new Mongo(HOST,PORT);//建立数据库连接   
             
              long endTime=System.currentTimeMillis(); 
              DB testDB=conn.getDB(DB_NAME);//取得test数据库 
              
              System.out.println(endTime-beginTime);
              /**  
               * 如果test数据库没有设定用户权限认证，则无需下面的验证  
               */  
              boolean loginSuccess=testDB.authenticate(USER, PASSWORD.toCharArray());   
              if(!loginSuccess){   
                  throw new Exception("登录"+DB_NAME+"验证失败,请确认用户名和密码");   
              }   
              testDB=conn.getDB(DB_NAME);//取得test数据库   
              /**  
               * 如果COLLECTION不存在，则MongoDB会自动为你创建此collection  
               */  
              DBCollection collection=testDB.getCollection(COLLECTION);   
              //开始插入数据操作

View Full Code Here


            if (_isSlaveOK) {
                _mongoOptions.readPreference = ReadPreference.secondaryPreferred();
            }


            _mongo = new Mongo(serverAddressList, _mongoOptions);


        } catch (UnknownHostException e) {
            throw Throwables.propagate(e);
        }

View Full Code Here

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Examples of com.mongodb.Mongo

Connecting to a Replica Pair

Connecting to a Replica Set

Related Classes of com.mongodb.Mongo