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Running iwmodelC from within Java

Annad

I have a requirement where I need to create the jobspec xml file in one of the external task in our workflow and simply start a sub workflow off of that jobspec. In perl, I could issue the iwmodelc command and it worked.

However in java I don't see any libraries I could use to achieve this. I tried using com.interwoven.modeler.clt.* but not sure which object/function to use from here.

Has anyone has this specific need that can help me?

Thanks,

Anna.

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ISCBorisB

I have a requirement where I need to create the jobspec xml file in one of the external task in our workflow and simply start a sub workflow off of that jobspec. In perl, I could issue the iwmodelc command and it worked.

However in java I don't see any libraries I could use to achieve this. I tried using com.interwoven.modeler.clt.* but not sure which object/function to use from here.

Has anyone has this specific need that can help me?

Thanks,

Anna.

iwmodelc is just a Command. You can execute it using ProcessBuilder Class or old-fashion way using Runtime exec Method,
something like Runtime.getRuntime().exec(Your_Command). Note that in the latter case you may need BufferedReader/InputStreamReader
if you have significant STDOUT output (that's actually not the case for iwmodelc)

Annad

I tried this method already but it didn't work so I turned my attention to any built in IW java functions that would create jobspec.

Anyway I tried your suggestion again
Here is the code

/*
 * URLExternalTaskSimpleTest.java
 */

package dfait.custom.workflow;

import com.interwoven.cssdk.common.CSClient;
import com.interwoven.cssdk.common.CSException;
import com.interwoven.cssdk.workflow.*;
import java.lang.Runtime;
import java.io.*;
import java.util.*;

/**
 * An simple implementation of an external task.
 */
public class DFAITComponentController implements CSURLExternalTask
{
    public void execute ( CSClient client, CSExternalTask task, Hashtable params)throws CSException
    {
        CSWorkflow job = task.getWorkflow();
  String rss_enabled = job.getVariable("rssupdate_triggered");
  String lyris_enabled = job.getVariable("lyris_triggered");

  System.out.println("Testing"); 
  try{
   String command = "D:\\iw-home\\bin\\iwmodelc.exe -d \"Lyris Workflow\" \"/dfait-maeci/main/internet-internet/ci-ci/ci-ci/WORKAREA/content-contenu\" \"d:/iw-home/local/logs/wf\"";

   Runtime runtime = Runtime.getRuntime();
      Process process = runtime.exec(command);
   InputStream is = process.getInputStream();
      InputStreamReader isr = new InputStreamReader(is);
      BufferedReader br = new BufferedReader(isr);
      String line;

      System.out.println("Output of running %s is: "+ command);

      while ((line = br.readLine()) != null) {
           System.out.println("Line:"+ line);
      }

  }catch(IOException o){
   System.out.println("IO Execption");
   System.out.println(o.toString());
  }


    }
}

Here is what is being written into the servletd_out.log


Testing
IO Execption
java.io.IOException: CreateProcess: \iw-home\bin\iwmodelc.exe -d "Lyris Workflow" "/dfait-maeci/main/internet-internet/ci-ci/ci-ci/WORKAREA/content-contenu" "d:/iw-home/local/logs/wf" error=2

Any idea where I went wrong?

Anna.

ISCBorisB

String command = "D:\\iw-home\\bin\\iwmodelc.exe -d ..."

iwmodelc.bat is a Batch File, not exe. In general, if you have "Create Process" failure of any sort first thing
to do is to run the command manually from the command-line prompt, see what happens.

Note also that when asking for help it's a very good idea to describe what you've already done, what worked
and what didn't, etc. Saves lot of time

Adam Stoller

I have a requirement where I need to create the jobspec xml file in one of the external task in our workflow and simply start a sub workflow off of that jobspec. In perl, I could issue the iwmodelc command and it worked.

However in java I don't see any libraries I could use to achieve this. I tried using com.interwoven.modeler.clt.* but not sure which object/function to use from here.

Has anyone has this specific need that can help me?

Thanks,

Anna.

I have not tried this - so there could be errors in the code (and/or it might just not work) - but I think it would be something like this:

import java.util.Hashtable;

import com.interwoven.cssdk.common.CSClient;
import com.interwoven.cssdk.common.CSException;
import com.interwoven.cssdk.workflow.CSExternalTask;
import com.interwoven.cssdk.workflow.CSURLExternalTask;
import com.interwoven.cssdk.workflow.CSWorkflow;
import com.interwoven.cssdk.workflow.CSWorkflowEngine;

public class RunNestedWFM implements CSURLExternalTask  {
    // ...
    public void execute(CSClient client, CSExternalTask task, Hashtable hash)
            throws CSException {
        //... 
        String jobSpec = createJobSpec(/* parameters TBD */);
        CSWorkflowEngine wfsys = client.getWorkflowEngine();
        CSWorkflow subJob = wfsys.createNestedWorkflow(jobSpec, task.getId());
        // ...
    }
}

Give that a whirl and let us know (a) if it works and (b) provide updated boiler-plate code here if you had to change anything.

Annad

Thanks,
I was hoping to do something similar too. but I could not find the function/library that I could use to create the jobspec.

In your code where does the function createJobSpec() come from? Were you thinking of a custom function or from one of the CSSDK libraries?

I couldn't find the right function that would create the jobspec for me given the wfm and your function createJobSpec() won't work unless it is in one of the java libraries.

I'll keep looking,

Anna.

Date_Format_Test.rptdesign

Adam Stoller

Thanks,
I was hoping to do something similar too. but I could not find the function/library that I could use to create the jobspec.

In your code where does the function createJobSpec() come from? Were you thinking of a custom function or from one of the CSSDK libraries?

I couldn't find the right function that would create the jobspec for me given the wfm and your function createJobSpec() won't work unless it is in one of the java libraries.

I'll keep looking,

Anna.

There is no OOTB function for creating a job specification file - you do that yourself - or create jobspec template files in a known location and read them in from the file system. We did something similar here for a different reason:

Migrateduser

I think ghoti's approach is the optimal approach in this scenario, but you do need to be aware (i.e., document for whomever replaces you when you get your next big promotion) that the approach will require updating the XML file whenever you update the model.

Forking an iwmodelc eliminates that extra effort, but it increases the fragility of the solution. Whatever you do, make sure you've written a few decent automated test scripts to exercise it when you do update the model.

Migrateduser

Or you can create the job spec as a String in your java code and plug in variables along the way so that you can customize the job spec very easily. Then use:

CSWorkflowEngine.[size=2]createWorkflow(jobSpec);

[/size]

missingColumnCrosstab.csv

missingColumnCrosstab.rptdesign