OrientDB - Java Interface


Advertisements


Similar to RDBMS, OrientDB supports JDBC. For this, first we need to configure the environment for JDBC programming. Following is the procedure to create a connection between your application and database.

First, we need to download the JDBC Driver. Visit the following link https://code.google.com/archive/p/orient/downloads to download OrientDB-JDBC.

Following are the basic five steps to achieve OrientDB-jdbc connectivity.

  • Load JDBC driver
  • Create Connection
  • Create statement
  • Execute statement
  • Close connection

Example

Try the following example to understand OrientDB-JDBC connectivity. Let us consider we have an employee table which contains the following fields and its types.

Sr.No. Field Name Type
1 Id Integer
2 Name String
3 Salary Integer
4 Join date Date

You can create a Schema (table) by executing the following commands.

CREATE DATABASE PLOCAL:/opt/orientdb/databases/testdb 
CREATE CLASS Employee 
CREATE PROPERTY Customer.id integer 
CREATE PROPERTY Customer.name String 
CREATE PROPERTY Customer.salary integer 
CREATE PROPERTY Customer.join_date date 

After executing all the commands, you will get the Employee table with the following fields, employee name with id, age, and join_date fields.

Save the following code into OrientJdbcDemo.java file.

import com.orientechnologies.common.log.OLogManager; 
import com.orientechnologies.orient.core.db.document.ODatabaseDocumentTx; 
import org.junit.After; 
import org.junit.Before; 
import org.junit.BeforeClass;
  
import java.io.File; 
import java.sql.DriverManager; 
import java.util.Properties;
  
import static com.orientechnologies.orient.jdbc.OrientDbCreationHelper.createSchemaDB; 
import static com.orientechnologies.orient.jdbc.OrientDbCreationHelper.loadDB; 
import static java.lang.Class.forName;
  
public abstract class OrientJdbcDemo {
  
   protected OrientJdbcConnection conn; 
   
   public static void main(String ar[]){ 
       
      //load Driver 
      forName(OrientJdbcDriver.class.getName()); 
      String dbUrl = "memory:testdb"; 
      ODatabaseDocumentTx db = new ODatabaseDocumentTx(dbUrl); 
      String username = "admin"; 
      String password = "admin"; 
      createSchemaDB(db); 
      loadDB(db, 20); 
      dbtx.create(); 
       
      //Create Connection 
      Properties info = new Properties(); 
      info.put("user", username); 
      info.put("password", password); 
      conn = (OrientJdbcConnection) DriverManager.getConnection("jdbc:orient:" + dbUrl, info); 
	  
      //create and execute statement 
      Statement stmt = conn.createStatement(); 
      int updated = stmt.executeUpdate("INSERT into emplyoee 
         (intKey, text, salary, date) values ('001','satish','25000','" 
          + date.toString() + "')"); 
			 
      int updated = stmt.executeUpdate("INSERT into emplyoee 
         (intKey, text, salary, date) values ('002','krishna','25000','" 
         + date.toString() + "')"); 
			
      System.out.println("Records successfully inserted"); 
	  
      //Close Connection 
      if (conn != null && !conn.isClosed()) 
         conn.close(); 
   } 
}

The following command is used to compile the above program.

$ javac –classpath:.:orientdb-jdbc-1.0-SNAPSHOT.jar OrientJdbcDemo.java  
$ java –classpath:.:orientdb-jdbc-1.0-SNAPSHOT.jar OrientJdbcDemo 

If the above command is executed successfully, you will get the following output.

Records Successfully Inserted 


Advertisements
E-Books Store