MDM API Connection issue

Question

Hi,
I am trying to  establish connection to MDM server by the following statement ( Java stadalone app)
ConnectionPoolFactory.getInstance("Host:6000");
But I am getting exception "com.sap.mdm.net.ConnectionException: Could not open minimum connections."
Am I missing some config on MDM side??
Thanks, Anil

Answer 1

Dear Anil,
first of all you need to connect to the MDM server.
This is done without any repository consideration just by the hostname of the MDM-Server.
The standard port used to make this connection from your (Java) client is 20005.
You can change this port where MDM-Server is listening in mds.ini by providing another one.
CODE:
public ConnectionAccessor getConnection() {
  String sHostName = MyServerName;
  ConnectionAccessor connection = null;
  // We need a try / catch statement or a throws for the method
  try {
    /* retrieve connection from Factory
     * The hostname can be the name of the server if it is listening on the standard port 20005
     * or a combination of Servername:Portnumber eg. MDMSERVER:40000
    connection = SimpleConnectionFactory.getInstance(sHostName);
  } catch (ConnectionException e){
    // Do some exception handling
    e.printStackTrace();
  // return the connection or if an exception occurred a NULL value
  return connection;
Then you can think about the Session you want to make to the repository.
This is taken from my Blog:
In general there are three different kinds of connections and depending on the thing you want to do, you will need a different kind. But let me point out the three different kinds available:
   1. Server session:
      A server session is used for management operations of a running MDM Server. This could be mounting- or unarchive a repository. You could even stop the server with this kind of session if needed. In fact u could say that the operations done with MDM Console partly need a server session.
      The associated command would be: CreateServerSessionCommand
   2. Repository Session:
      A repository session is bound to a specific repository and is used for management operations. Operations could be CRUD (Create, Read, Update, Delete) on Repository elements (user roles, model data such as fields, tables...) not the data in the repository itself. Same as with the server session we could say that a repository session is partly needed by the MDM Console.
      The associated command would be: CreateRepositorySessionCommand
   3. User session
      A user session is used for any operation that might be performed by the MDM Datamanager. Basically any kind of data manipulation is done using a user session (CRUD of Data). So having this session we will be able to perform searches, creating, updating and deleting data records.
      The associated command would be: CreateUserSessionCommand
Most of the time you will need a User Session to read/write data from MDM.
So to get a User-Session you will need to use the CreateUserSessionCommand.
   RepositoryIdentifier repId = new RepositoryIdentifier(RepositoryNameAsString, DBServerNameAsString, DBMSTypeAsString);
   // Create the command to get the Session
   CreateUserSessionCommand createUserSessionCommand = new CreateUserSessionCommand(connection);
   // Set the identifier
   createUserSessionCommand.setRepositoryIdentifier(repId);
   // Set the region to use for Session - (Language)
   createUserSessionCommand.setDataRegion(dataRegionAsString);
   // Execute the command
   createUserSessionCommand.execute();
   // Get the session identifier
   String session = createUserSessionCommand.getUserSession();
Please node that if the RepositoryIdentifier is set the wrong way you will not be able to create a connection as well. So please double check this parameters.
After all you need to authenticate the session but for further details please have a look at the blog Regina provided the link to.
Hope this helped to find the problem!
Best regards,
Tobi