NullPointerException using OKMDocument move

[matt81]

Hi,
From a workflow I am trying to move a document in Openkm, using the following code:
OKMDocument.getInstance().move(token, "/okm:root/bla", "/okm:root/da");

However i am getting the following error:

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ERROR com.openkm.servlet.frontend.WorkflowServlet - 
com.openkm.core.WorkflowException
	at com.openkm.module.common.CommonWorkflowModule.runProcessDefinition(CommonWorkflowModule.java:286)
Caused by: java.lang.NullPointerException
	at com.openkm.module.db.DbDocumentModule.move(DbDocumentModule.java:1056)
	at com.openkm.api.OKMDocument.move(OKMDocument.java:292)
	at com.openkm.workflow.assignment.ConvertDoc.assign(ConvertDoc.java:118)
	at org.jbpm.taskmgmt.exe.TaskMgmtInstance.performAssignmentDelegation(TaskMgmtInstance.java:320)
	at org.jbpm.taskmgmt.exe.TaskMgmtInstance.performAssignment(TaskMgmtInstance.java:274)

Do you know what the problem could be.

Thanks

[pavila]

I need the complete code to guess what is happening.

[matt81]

Well that's the line where it is throwing the error, prior to that I am just parsing strings and converting it to PDF like the following code:

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pathName = extFile.substring(0, slashName);
DocumentServlet cm = new DocumentServlet();
cm.convertToPdf(openkmPath);

Please note if I place the code in try catch, the error code is not thrown but I just need to know why this is happening.

Thanks

[pavila]

Sorry but I need a complete working example which can reproduce the error.

[matt81]

OK here it is:

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public void assign(Assignable arg0, ExecutionContext exec) throws Exception {
		
		//Get UUID, token and nodepath
		String uuid = (String) exec.getContextInstance().getVariable("uuid");
		String token = exec.getToken().toString();
		String openkmPath = OKMRepository.getInstance().getNodePath(token, uuid);

//convert to PDF in openkm
		DocumentServlet cm = new DocumentServlet();
		cm.convertToPdf(openkmPath);

DocumentModule dr = ModuleManager.getDocumentModule();
			dr.move(token, pathName + "/" + deleteFile, "/okm:trash");

//move to next task node automatically
		exec.getToken().signal();
}

Please let me know.

[jllort]

A lot of strange things here:
Use servlet for conversion seems not good idea, why you do not use DocConverter.java class ?
What's is the pathName and deleteFile values ? I've not seen initialized anyware ?
If you want to delete a file should use OKMDocument.getInstance(token, pathFile to delete), should be deleted in user trash. Or if you want to store always in some place the idea should be create a folder called /okm:trash/workflow but not move files to /okm:trash, that seems not good idea.

[matt81]

Thanks for the reply.
Well why would you say strange, it does the job.
I have tried all the other classes and I cannot achieve what I need. With DocConverter.java if I use the following two methods, I have to supply them with a FILE paramenter. How can I pass a File parameter when the file is located within openkm itself, I can only pass a string, hence why I cannot use them.

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DocConverter.getInstance().convert(File arg0, mimetype, File arg2);
DocConverter.getInstance().doc2pdf(File arg0, mimetype, File arg2);

I have tried to delete a file using the following code as well, as you suggested previously but it gave me the same error "Null pointer exception", and also a pop up sating that you cannot delete documents from workflows, hence why I used the move function to the trash folder.

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DocConverter.getInstance().delete(token, path);

The pathName and deleteFile values are initialised I just forgot to include them, so that's all good.
Everything has been tried hence why that solution works for me, aprt fromt he fact that it throws an error if it's not in try and catch block.

Thanks

[jllort]

You got FileUtils.java class what allows you to create tmp file, work on int and when finished remove. Take a look here http://doxygen.openkm.com/openkm/d1/d5c ... utils.html