Issue in Adapter Module

Question

Hi Experts,
I have written an Adapter module to set the target file name (because it could not be done with usual DynamicConfig in mapping because of multimapping). I am facing a peculiar issue with it. For ex: I have 3 msgs. First msg started executing the module to set the target fillename and about to end the module execution. Meanwhile second msg enters the module execution and changes the file name. This is resulting in first msg to post a file with name set by second msg. I have put "Maintain order at runtime" in interface determination of ID to fix the issue. But this isssue is still persisting. Please let me know, how can a msg acquire a lock on the module and untill it finishes it execution, no other msg should start the module execution.
Thanks,
Rakesh

Answer 1

Hi Michal,
I have written below code to name the \target file in module code. I have also set "Adapter specific msg attributes" in receiver file adapter and referred file name from dynamic config:
public ModuleData process(ModuleContext inputModuleContext, ModuleData inputModuleData)
     throws ModuleException {
               Object obj = null;
               Message msg = null;
               AuditAccess audit = null;
               MessageKey keyOut = null;
               obj = inputModuleData.getPrincipalData();
               msg = (Message) obj;
               keyOut = new MessageKey(msg.getMessageId(),msg.getMessageDirection());
               try
                    audit = PublicAPIAccessFactory.getPublicAPIAccess().getAuditAccess();     
                    audit.addAuditLogEntry(keyOut, AuditLogStatus.SUCCESS, "Module Started Execution..");
                    MessagePropertyKey mpk = new MessagePropertyKey("FileName","http://sap.com/xi/XI/System/File");
                    InputStream is = msg.getDocument().getInputStream();
                    DocumentBuilderFactory docBuilderFact = DocumentBuilderFactory.newInstance();
                    DocumentBuilder docBuilder      = docBuilderFact.newDocumentBuilder();
                    Document doc = docBuilder.parse(is);
                    Node nl = (Node) doc.getDocumentElement();
                    Node n = nl.getFirstChild();
                    Attr a = (Attr) n.getAttributes().item(0);
                    String Num = a.getValue();
                    audit.addAuditLogEntry(keyOut, AuditLogStatus.SUCCESS, "Number is "+Num);
                    Attr a1,a2;
                    if (n.getNodeName().equalsIgnoreCase("Create"))
                         a1 = (Attr) n.getAttributes().item(1);
                         String sd = a1.getValue();
                         audit.addAuditLogEntry(keyOut, AuditLogStatus.SUCCESS, "Start Date is "+sd);
                         String fileName = sd + "-" + Num + ".xml";
                         msg.setMessageProperty(mpk,fileName);
                    else(n.getNodeName().equalsIgnoreCase("Update"))
                         a2 = (Attr) n.getAttributes().item(2);
                         String sd = a2.getValue();
                         audit.addAuditLogEntry(keyOut, AuditLogStatus.SUCCESS, "Start Date is "+sd);
                         String fileName = sd + "-" + Num + ".xml" ;
                         msg.setMessageProperty(mpk,fileName);
               catch(Exception e)
                    audit.addAuditLogEntry(keyOut, AuditLogStatus.ERROR, "Execption Occured.." + e);
               return inputModuleData;
When 3 msgs get created for Create interface, File name set by first msg is being changed by second and file for first msg is posted with name set by second (because second msg has changed the target file in module code by that time )