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      Server Connection (V4.1.0 or Later)

      1. Ultipa Database Address

      Multiple addresses of the servers of a cluster should be separated with comma ',' before being configured as the Ultipa Database Address.

      2. Account and Password

      Default account and password of the Ultipa Database are both 'root'

      3. Configuration

      Configuration class UltipaConfiguration suports settings such as connetion timeout, consistency level, etc. In the case of ssl connetection type, crt and overrideAuthority should be set.

      Item Range Description
      username / The account username
      password / The account password
      hosts / The server address, either the address of a stand-alone server, or multiple addresses of all servers of a cluster separated with comma ','
      timeout >0 The UQL operation timeout
      consistency true, false The consistency level
      crt / File path of CA certificate
      overrideAuthority ultipa Over-ride the 'hostname' to match the cert the server uses
      heartbeat >0, int the seconds of heartbeat to all instances, 10 by default, and 0 means turn off heartbeat
      maxRecvSize >0, int max byte when receive data, 410241024 byte by default (4M)
      defaultGraph str graphset name when establishing connection with database, or 'default' graphset if not set

      4. Instantiation of UltipaClientDriver

        UltipaConfiguration configuration = UltipaConfiguration.config()
                      .username("root")
                      .password("root")
                      .hosts("192.168.1.1:60061");
      
        UltipaClientDriver driver = new UltipaClientDriver(configuration);
        Connection client = new DefaultConnection(driver, "default");
        String reply = client.sayHello("Ultipa");
        System.out.println(reply);
      

      5. Configuration File

      The Ultipa Server can also be connected via a configuration file named 'ultipa.properties', which will be read automatically when creating UltipaClientDriver and thus no need for UltipaConfiguration.

      Create file 'ultipa.properties' under classpath of the database project, and fill below configurations:

      ultipa.username=root
      ultipa.password=root
      ultipa.hosts=192.168.1.1:60061,192.168.1.2:60061,192.168.1.3:60061
      ultipa.timeout=15
      ultipa.consistency=false
      ultipa.crt=F:\\ultipa.crt
      ultipa.overrideAuthority=ultipa
      ultipa.defaultGraph=default
      

      Instantiate the UltipaClientDriver with configuration file:

      UltipaClientDriver driver = new UltipaClientDriver();
      Connection client = new DefaultConnection(driver);
      String reply = client.sayHello("Ultipa");
      System.out.println(reply);
      

      6. Connection Pool

      UltipaClientDriver uses connection pool by default. The underlying implementation uses Apache Common-Pool, connection pool information can be configured when creating UltipaClientDriver (which will be overwritten by the configuration in the ultipa.properties under classpath if there is any):

      UltipaConfiguration configuration = UltipaConfiguration.config()
              .username("root")
              .password("root")
              .hosts("192.168.1.1:60061");
      PoolConfig poolConfig
              = configuration.getPoolConfig();
      poolConfig.setMaxIdle(50);
      poolConfig.setMinIdle(2);
      poolConfig.setMaxTotal(200);
      poolConfig.setMaxWaitMillis(-1);
      UltipaClientDriver driver = new UltipaClientDriver(configuration);
      Connection client = new DefaultConnection(driver, "default");
      String reply = client.sayHello("Ultipa");
      System.out.println(reply);
      

      The connection pool information can be alternatively included in the configuration file 'ultipa.properties':

      # Maximum number of idle connections
      ultipa.pool.maxIdle=50
      # Minimum number of idle connections
      ultipa.pool.minIdle=20
      # Maximum number of total connections
      ultipa.pool.maxTotal=2000
      # Minimum idle time of an evictable connection, defalut is 1800000 ms (30 min)
      ultipa.pool.minEvictableIdleTimeMillis=1800000
      # Test interval for evictable connections (ms), default is -1 (do not scan)
      ultipa.pool.timeBetweenEvictionRunsMillis=3600000
      # Test connections when borrow, default is fasle
      ultipa.pool.testOnBorrow=true
      # Test connections when return, default is fasle
      ultipa.pool.testOnReturn=false
      # Test connections when idle, default is fasle
      ultipa.pool.testWhileIdle=false
      # Maximum wait time, default is -1 (infinite wait)
      ultipa.pool.maxWaitMillis=-1
      # Last in first out, default is true
      ultipa.pool.lifo=true
      # Block new request when connections are exhausted, default is true (block until timeout), false will popup error
      ultipa.pool.blockWhenExhausted=true
      # Number of connections to test each time, default is 3
      ultipa.pool.numTestsPerEvictionRun=3
      

      7. Create DataSource

      When creating datasource the configuration in ultipa.properties under classpath will be ingored:

      UltipaConfiguration configuration = UltipaConfiguration.config()
              .username("root")
              .password("root")
              .hosts("192.168.1.1:60061");
      PoolConfig poolConfig
              = configuration.getPoolConfig();
      poolConfig.setMaxIdle(50);
      poolConfig.setMinIdle(2);
      poolConfig.setMaxTotal(200);
      poolConfig.setMaxWaitMillis(-1);
      
      DataSource dataSource = new DataSource();
      dataSource.setUltipaConfiguration(configuration);
      
      UltipaClientDriver driver = new UltipaClientDriver(dataSource);
      Connection client = new DefaultConnection(driver, "default");
      String reply = client.sayHello("Ultipa");
      System.out.println(reply);
      
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