Simple Material Data Retrieval
In this example we are actually going to query for a material number within SAP and report whether or not the number exists. If it does exist, we will print out the description. We've kept this example as simple as possible; it has no graphics and skips some of the detail in the steps that were performed in the first example, such as getting your SAP login and setting up the Orbix Daemon. Please refer to the first example if you require more details on these steps.
Step 1: Building up the JavaGetMat Class
Start this example by creating a new console application in the Java Compiler and adding one class to it, JavaGetMat, as shown in Figure 5.10.
The code for this example is similar to the first example but has some additional calls to get the material information through a few BAPI calls.
Step 2: Entering and Compiling the Code
The complete listing for the JavaGetMat program follows. Enter the code and compile it through the build operation (see the JavaPing example earlier in this chapter).
// JavaGetMat, a very simple Java program to log in to a SAP system // and check for the existence of a material. If the material exists, // then return the material number and description. For this we will // use two BAPIs: BAPI_MATERIAL_EXISTENCE_CHECK and // BAPI_MATERIAL_GETDETAIL import com.sap.rfc.*; import com.sap.rfc.exception.*; import java.io.*; public class JavaGetMat { public static void main (String[] args) { // Simple declaration of variables String rfcHost = "testsystem", // Java RFC Host r3Host = "test.system.com", // SAP System Name r3SysNo = "00", // System Number client = "001", // SAP Client Number user = "kenkroes", // Your User Name password = "scoobydoo" // Your Password language = "EN"; // Your Login Language FactoryManager facMan = null; IRfcConnection connection = null; // Establish the connection to the Orbix Middleware MiddlewareInfo mdInfo = new MiddlewareInfo(); mdInfo.setMiddlewareType(MiddlewareInfo.middlewareTypeOrbix); mdInfo.setOrbServerName(rfcHost); // let the global factory manager use the middlewareInfo // to create all object factories by binding to the server facMan = FactoryManager.getSingleInstance(); facMan.setMiddlewareInfo(mdInfo); // Define The User information UserInfo userInfo = new UserInfo(); ConnectInfo connectInfo = new ConnectInfo(); userInfo.setClient(client); userInfo.setUserName(user); userInfo.setPassword(password); userInfo.setLanguage(language); // Set up the Connection connectInfo.setRfcMode(ConnectInfo.RFC_MODE_VERSION_3); connectInfo.setDestination("xxx"); connectInfo.setHostName(r3Host); connectInfo.setSystemNo((short)Integer.parseInt(r3SysNo)); connectInfo.setLoadBalancing(false); connectInfo.setCheckAuthorization(true); // Try to establish the connection try { connection = facMan.getRfcConnectionFactory() .createRfcConnection(connectInfo, userInfo); connection.open(); } catch (JRfcRfcConnectionException re) { System.out.println("Unexpected RfcError while opening connection.\n" + re.toString()); return; } catch (JRfcBaseRuntimeException je) { System.out.println("Unexpected JRFC runtime exception:\n" + " while opening connection.\n" + je.toString()); return; } // Simple routine to get data from user for the material number // if the user types in ‘bye' the routine stops. System.out.println("Congratulations, Connection Established !"); StringBuffer buf = new StringBuffer(50); int c; Character inChar = null; while(true) { buf.setLength(0); try { while((c = System.in.read()) != ‘\n') { if (inChar.isLetterOrDigit((char)c) || c == ‘ ‘) buf.append((char)c); } if (buf.toString().equals("bye")) break; } catch(IOException io) { System.out.println("Problem reading keyboard"); return; } // Now setup the parameters for the BAPI call. This is a very simple // (yet inefficient) way to do this. More information on setting up // RFC parameters through "Factories" is discussed in Chapter 11 // Build up object for the RFC Module IRfcModuleFactory moduleFac = facMan.getRfcModuleFactory(); IRfcModule theModule = null; try { theModule = moduleFac. autoCreateRfcModule(connection, "BAPI_MATERIAL_EXISTENCECHECK"); theModule.getSimpleImportParam("MATERIAL").setString(buf.toString()); // Make the Call !! theModule.callReceive(); } catch(JRfcRemoteServerException je) { System.out.println("Unexpected JRFC runtime exception:\n" + " while Calling RFC.\n" + je.toString()); return; } catch(JRfcRfcConnectionException je) { System.out.println("Unexpected JRFC runtime exception:\n" + " while Calling RFC.\n" + je.toString()); return; } catch(JRfcRfcAbapException je) { System.out.println("Unexpected JRFC runtime exception:\n" + " while Calling RFC.\n" + je.toString()); return; } catch(JRfcRemoteAutoCreateException je) { System.out.println("Unexpected JRFC runtime exception:\n" + " while Calling RFC.\n" + je.toString()); return; } // Display the results char bapiReturn; bapiReturn = theModule.getStructExportParam("RETURN"). getSimpleField("TYPE").getChar(); if ( String.valueOf(bapiReturn) != "S" ) System.out.println("Return =" + bapiReturn); // Material Exists get description try { theModule = moduleFac. autoCreateRfcModule(connection, "BAPI_MATERIAL_GET_DETAIL"); theModule.getSimpleImportParam("MATERIAL").setString(buf.toString()); theModule.callReceive(); } catch(JRfcRemoteServerException je) { System.out.println("Unexpected JRFC runtime exception:\n" + " while Calling RFC.\n" + je.toString()); return; } catch(JRfcRfcConnectionException je) { System.out.println("Unexpected JRFC runtime exception:\n" + " while Calling RFC.\n" + je.toString()); return; } catch(JRfcRfcAbapException je) { System.out.println("Unexpected JRFC runtime exception:\n" + " while Calling RFC.\n" + je.toString()); return; } catch(JRfcRemoteAutoCreateException je) { System.out.println("Unexpected JRFC runtime exception:\n" + " while Calling RFC.\n" + je.toString()); return; } // Print the material number and description String matDesc; matDesc = theModule.getStructExportParam("MATERIAL_GENERAL_DATA"). getSimpleField("MATL_DESC").getString(); System.out.println(buf.toString() + " " + matDesc ); } } }
Step 3: Running the Program
Start the Orbix Daemon as described in the JavaPing example. Open a DOS window on your system and change directories to the one that contains your JavaGetMat application. Type JavaGetMat at the prompt; your screen should look like that in Figure 5.11.
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