Multiple adapters scenario

Question

Hi there,
i am working on a multiple adapters scenario and would like to get some help from you experts.
I will try to explain the requirements of it:
1) An external system will send a request to XI (in order to "start" the process) --> SOAP adapter (sender/request)
2) XI will communicate with SAP and retrieve a table from there --> sRFC adapter (receiver)
3) XI will update a table (Oracle DB) of the source system (the external one from step1) --> JDBC adapter (??)
i have been involved in scenarios with SOAP adapter and JDBC separately but not all together.Thus i dont know how to elaborate the third step.In addition i would prefer avoiding the use of BPM if possible.
Questions:
a) What is the best practise here?
b) I am not using WS.response so i dont know how to retrieve back the data to the sorce (that is the target system at the same time) by using the JDBC (cause i need to update a table).
Could you please help me on this?
Thanks in advance and best regards,
David

Answer 1

Hi,
Here is a sample code for RFC lookup
package com.ibis.mapping.lookup.websiteorders;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.util.HashMap;
import java.util.Map;
import com.sap.aii.mapping.api.AbstractTrace;
import com.sap.aii.mapping.api.MappingTrace;
import com.sap.aii.mapping.api.StreamTransformation;
import com.sap.aii.mapping.api.StreamTransformationConstants;
import com.sap.aii.mapping.api.StreamTransformationException;
import com.sap.aii.mapping.lookup.Channel;
import com.sap.aii.mapping.lookup.LookupException;
import com.sap.aii.mapping.lookup.LookupService;
import com.sap.aii.mapping.lookup.Payload;
import com.sap.aii.mapping.lookup.RfcAccessor;
import com.sap.aii.mapping.lookup.XmlPayload;
public class RFCLookup implements StreamTransformation
     public Map param = null;
     public static void main(String[] args)
          try
               InputStream in = new FileInputStream(new File(
                         "TestFile.xml"));
               OutputStream out = new FileOutputStream(
                         new File(
                                   "Test.xml"));
System.out.println("Hello");
               RFCLookup rfcLookup = new RFCLookup();
               rfcLookup.execute(in, out);
          catch (Exception e)
               System.out.println("ERROR IS :" + e.getMessage());
     public void execute(InputStream inputStream, OutputStream outputStream)
               throws StreamTransformationException
          MappingTrace importanttrace;
          importanttrace = (AbstractTrace)param.get(StreamTransformationConstants.MAPPING_TRACE );
          RfcAccessor accessor = null;
          try
               // 1. Determine a channel (Business system, Communication channel)
               Channel channel = LookupService.getChannel("BS_name", "Comm_channel_name");
               // 2. Get a RFC accessor for a channel.
               accessor = LookupService.getRfcAccessor(channel);
               importanttrace.addInfo("Accessor Looked up.");
               // 4. Create xml payload from the inputStream
               XmlPayload payload = LookupService.getXmlPayload(inputStream);
               importanttrace.addInfo("Input stream payload fetched");
               // 5. Execute lookup.
               Payload result = accessor.call(payload);
               importanttrace.addInfo("Called the RFC");
               // 6. Get the lookup response in new InputStream
               InputStream in = result.getContent();
               importanttrace.addInfo("got output");
               // 7. Transfer the inputstream into outputstream
               byte[] buffer = new byte[1024];
               for (int read = in.read(buffer); read > 0; read = in.read(buffer))
                    outputStream.write(buffer, 0, read);
                    outputStream.write('\n');
               outputStream.flush();
          catch (LookupException e)
               importanttrace.addWarning("Error while lookup " + e.getMessage());
          catch (IOException e)
               importanttrace.addWarning("Error " + e.getMessage() );
          finally
               // 8. close the accessor in order to free resources.
               if (accessor != null)
                    try
                         accessor.close();
                    catch (LookupException e)
                          importanttrace.addWarning("Error while closing accessor " + e.getMessage() );
     public void setParameter(Map param)
          this.param = param;          
          if (param == null)
              this.param = new HashMap();
This code works and all you need is the source RFC interface and target RFC interface.
compile this code and import it as java mapping in interface mapping..
now specify some RFC request in the test tab of interface mapping. the o/p will be response from RFC
Dont forget to modify the name of ur comm channel and business system in the code
Channel channel = LookupService.getChannel("BS_name", "Comm_channel_name");
Edited by: Progirl Progirl on Jul 21, 2008 4:25 PM