Synchronous data exchange over JCaps without TCP/IP or WebService...

Question

Hi all,
the subject may sound like a little crazy request, but that is what we actually need.
Just to explain: we have a SAP R/3 system running (v. 4.72) which is not able to call Web Services and is also not able to open a TCP/IP-connection to a foreign host to exchange data.
But what we need is a synchronous data exchange as, after pressing a button in SAP, we should query some database tables of another sub-system with JCaps and send back the received information to SAP.
Do you have any ideas out there how this synchronous request from SAP to JCaps can be fullfilled with JCaps (our version is 5.1.3)?!
We thought about using a HTTP server on the JCaps side, where SAP just sends a HTTP-request on the specified address and then we could use the data received from this call, to get data from the sub-system and then send it back to SAP over an RFC or something similar - that is the easier part (sending data back to SAP). The harder part, in my opinion, is to create a possibility for SAP to call JCaps immediately - so not asynchron, which we already implemented over a file export...
So, is it possible to use HTTP-server from JCaps for our needs?! Or is there another, easier possibility?!
Any help highly appreciated...
Regards
Bernhard Böhm

Answer 1

Hi Chris,
thanks for the input - we also have a similar thing running, also using our BW-Server (SAP ERP 6.0) as the "web service engine"....
But now, we want a solution without another server (like the BW in the upper case) involved!
So, we thought about using HTTP-server on the JCaps-side which should be invoked by a simple HTTP-request from SAP (also possible in 4.72).
Now I tried to setup a simple HTTP-Server project in JCaps 5.1.3 and it is making me crazy right now...
I just do not get it to work - all I would do is a simple JCD that just print a line in the log-file when started. The JCD has just a "processRequest"-method from HTTPS-Server-eWay. In the connectivity map I did set up the connection to the HTTP-Server with the servlet-url-name - property:
http://localhost:18001/dpListenHTTP_servlet_HttpServerServlet (like described in the userGuide).
But when trying to build the project I get this error:
com.stc.codegen.framework.model.CodeGenException: code generation error at = HTTP_Listen_cmListenHTTP_jcListenHTTP1 - HTTP Server e*Way Code GeneratorProblem creating war: C:\temp\dpListenHTTPprj_WS_serTestHTTP\12217262314811\WEB-INF\classes\..\dpListenHTTP_servlet_http:\localhost:18001\dpListenHTTP_servlet_HttpServerServlet.war (The filename, directory name, or volume label syntax is incorrect) (and the archive is probably corrupt but I could not delete it)
     at com.stc.codegen.frameworkImpl.model.CodeGenFrameworkImpl.process(CodeGenFrameworkImpl.java:1569)
     at com.stc.codegen.frameworkImpl.model.DeploymentVisitorImpl.process(DeploymentVisitorImpl.java:405)
     at com.stc.codegen.frameworkImpl.model.DeploymentVisitorImpl.process(DeploymentVisitorImpl.java:308)
     at com.stc.codegen.frameworkImpl.model.DeploymentVisitorImpl.traverseDeployment(DeploymentVisitorImpl.java:268)
     at com.stc.codegen.driver.module.DeploymentBuildAction.loadCodeGen(DeploymentBuildAction.java:923)
     at com.stc.codegen.driver.module.DeploymentBuildAction.access$1000(DeploymentBuildAction.java:174)
     at com.stc.codegen.driver.module.DeploymentBuildAction$1.run(DeploymentBuildAction.java:599)
     at org.openide.util.Task.run(Task.java:136)
     at org.openide.util.RequestProcessor$Processor.run(RequestProcessor.java:599)
Caused by: Problem creating war: C:\temp\dpListenHTTPprj_WS_serTestHTTP\12217262314811\WEB-INF\classes\..\dpListenHTTP_servlet_http:\localhost:18001\dpListenHTTP_servlet_HttpServerServlet.war (The filename, directory name, or volume label syntax is incorrect) (and the archive is probably corrupt but I could not delete it)
     at org.apache.tools.ant.taskdefs.Zip.executeMain(Zip.java:509)
     at org.apache.tools.ant.taskdefs.Zip.execute(Zip.java:302)
     at com.stc.codegen.frameworkImpl.model.util.AntTasksWrapperImpl.war(AntTasksWrapperImpl.java:404)
     at com.stc.connector.codegen.httpserveradapter.HSEWCodelet.generateFiles(HSEWCodelet.java:608)
     at com.stc.codegen.frameworkImpl.model.CodeGenFrameworkImpl.processCodelets(CodeGenFrameworkImpl.java:640)
     at com.stc.codegen.frameworkImpl.model.CodeGenFrameworkImpl.process(CodeGenFrameworkImpl.java:1546)
     ... 8 more
Caused by: java.io.FileNotFoundException: C:\temp\dpListenHTTPprj_WS_serTestHTTP\12217262314811\WEB-INF\classes\..\dpListenHTTP_servlet_http:\localhost:18001\dpListenHTTP_servlet_HttpServerServlet.war (The filename, directory name, or volume label syntax is incorrect)
     at java.io.FileOutputStream.open(Native Method)
     at java.io.FileOutputStream.<init>(FileOutputStream.java:179)
     at java.io.FileOutputStream.<init>(FileOutputStream.java:131)
     at org.apache.tools.zip.ZipOutputStream.<init>(ZipOutputStream.java:252)
     at org.apache.tools.ant.taskdefs.Zip.executeMain(Zip.java:407)
     ... 13 moreAnyone any idea how to set up a HTTP-server-project?!
Thanks and regards
Bernhard Böhm