Help on Lookup API

Question

Hi,
  While I was searching for stuff on Lookup API, I came across the two good blogs talking about different ways to do Lookups.
RFC Look up - Use this crazy piece for any RFC Mapping Lookups!
RFC lookup with communication channel - The specified item was not found.
But  I couldnt find an answer for the below questions.Would appreciate if  anyone can let me know,
1)  Which method has a good performance - Lookup using JCo or Lookup using RFC adapter(using communication channel)
2)  Is there any guideline to decide between JCo and RFC adapter method.
2)  If  I am using the JCo method to do the lookup, how can I provide the  connection details(host,username,password) at runtime.
Thanks in advance!

Answer 1

I think he is asking as to how we can pass the values dynamically using JCO.
Try creating a .properties file and store it in each instance of XI in a specific folder and code the JCO as follows.
try {
                properties = new Properties();
                properties.load(new FileInputStream(("/usr/sap/properties/xiprop.properties")));
                client = properties.getProperty("jco.client.client");
                user = properties.getProperty("jco.client.user");
                passwd = properties.getProperty("jco.client.passwd");
                ashost = properties.getProperty("jco.client.ashost");
                sysnr = properties.getProperty("jco.client.sysnr");
                // Change the logon information to your own system/user
                mConnection = JCO.createClient(client, user, passwd, "EN", ashost, sysnr );
                // connect to SAP
                mConnection.connect();
                // create repository
                mRepository = new JCO.Repository( "SAPLookup", mConnection );
                // Create function
                JCO.Function function = null;
                //write your code here
                IFunctionTemplate ft = mRepository.getFunctionTemplate("FunctionModuleName");
                function = ft.getFunction();
                // Obtain parameter list for function
                JCO.ParameterList input = function.getImportParameterList();
                // Pass function parameters
                input.setValue( a , "importValuetoFM" );
                mConnection.execute( function );
                ret = function.getExportParameterList().getString( "exportValueofFM" );
        } catch (Exception e) {
                e.printStackTrace();
                //Disconnect the connection
        } finally {
                if (mConnection != null) {
                                try {
                                                mConnection.disconnect();
                                        } catch (Exception ex) {
                                                ex.printStackTrace();
return ret;
BR