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How to run MWE2 workflow from my application [message #639044]

Mon, 15 November 2010 04:09

Raj

Messages: 2
Registered: September 2010

Junior Member

I like to know how to run MWE2 workflow programmatically from my application.

I have used the xtext example mydsl to create a xtext project and want to use the default generator (xpand) project to generate the code with given xpand template.

when i run it manually the workflow generates the code in src-gen folder. In the generator, go to src->workflow->MyDslGenertor.mwe2, right click on that and Run As -> MWE2 workflow generates the code.

But when i try call the WorkflowRunner.run method() from my plugin project's sample action, its giving me the following error.
------------------------------------------------------------ ------------
SEVERE: Content is not allowed in prolog.
org.xml.sax.SAXParseException: Content is not allowed in prolog. at com.sun.org.apache.xerces.internal.util.ErrorHandlerWrapper. createSAXParseException(Unknown Source)
at com.sun.org.apache.xerces.internal.util.ErrorHandlerWrapper. fatalError(Unknown Source)
at com.sun.org.apache.xerces.internal.impl.XMLErrorReporter.rep ortError(Unknown Source)
at com.sun.org.apache.xerces.internal.impl.XMLScanner.reportFat alError(Unknown Source)
at com.sun.org.apache.xerces.internal.impl.XMLDocumentScannerIm pl$PrologDriver.next(Unknown Source)
at com.sun.org.apache.xerces.internal.impl.XMLDocumentScannerIm pl.next(Unknown Source)
at com.sun.org.apache.xerces.internal.impl.XMLDocumentFragmentS cannerImpl.scanDocument(Unknown Source)
at com.sun.org.apache.xerces.internal.parsers.XML11Configuratio n.parse(Unknown Source)
at com.sun.org.apache.xerces.internal.parsers.XML11Configuratio n.parse(Unknown Source)
at com.sun.org.apache.xerces.internal.parsers.XMLParser.parse(U nknown Source)
at com.sun.org.apache.xerces.internal.parsers.AbstractSAXParser .parse(Unknown Source)
at com.sun.org.apache.xerces.internal.jaxp.SAXParserImpl$JAXPSA XParser.parse(Unknown Source)
at javax.xml.parsers.SAXParser.parse(Unknown Source)
at javax.xml.parsers.SAXParser.parse(Unknown Source)
at org.eclipse.emf.mwe.internal.core.ast.parser.WorkflowParser. parse(WorkflowParser.java:76)
at org.eclipse.emf.mwe.internal.core.ast.util.WorkflowFactory.p arseAndInitialize(WorkflowFactory.java:105)
at org.eclipse.emf.mwe.internal.core.ast.util.WorkflowFactory.p arseInitAndCreate(WorkflowFactory.java:59)
at org.eclipse.emf.mwe.internal.core.ast.util.WorkflowFactory.p arseInitAndCreate(WorkflowFactory.java:52)
at org.eclipse.emf.mwe.core.WorkflowRunner.prepare(WorkflowRunn er.java:332)
at org.eclipse.emf.mwe.core.WorkflowRunner.run(WorkflowRunner.j ava:290)
at com.ifx.dave.codegen.tmpt.gen.actions.Gen.run(Gen.java:81)
at org.eclipse.ui.internal.PluginAction.runWithEvent(PluginActi on.java:251)
at org.eclipse.ui.internal.WWinPluginAction.runWithEvent(WWinPl uginAction.java:229)
at org.eclipse.jface.action.ActionContributionItem.handleWidget Selection(ActionContributionItem.java:584)
at org.eclipse.jface.action.ActionContributionItem.access$2(Act ionContributionItem.java:501)
at org.eclipse.jface.action.ActionContributionItem$6.handleEven t(ActionContributionItem.java:452)
at org.eclipse.swt.widgets.EventTable.sendEvent(EventTable.java :84)
at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1053)
at org.eclipse.swt.widgets.Display.runDeferredEvents(Display.ja va:4066)
at org.eclipse.swt.widgets.Display.readAndDispatch(Display.java :3657)
at org.eclipse.ui.internal.Workbench.runEventLoop(Workbench.jav a:2629)
at org.eclipse.ui.internal.Workbench.runUI(Workbench.java:2593)
at org.eclipse.ui.internal.Workbench.access$4(Workbench.java:24 27)
at org.eclipse.ui.internal.Workbench$7.run(Workbench.java:670)
at org.eclipse.core.databinding.observable.Realm.runWithDefault (Realm.java:332)
at org.eclipse.ui.internal.Workbench.createAndRunWorkbench(Work bench.java:663)
at org.eclipse.ui.PlatformUI.createAndRunWorkbench(PlatformUI.j ava:149)
at org.eclipse.ui.internal.ide.application.IDEApplication.start (IDEApplication.java:115)
at org.eclipse.equinox.internal.app.EclipseAppHandle.run(Eclips eAppHandle.java:196)
at org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher .runApplication(EclipseAppLauncher.java:110)
at org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher .start(EclipseAppLauncher.java:79)
at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseS tarter.java:369)
at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseS tarter.java:179)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
at java.lang.reflect.Method.invoke(Unknown Source)
at org.eclipse.equinox.launcher.Main.invokeFramework(Main.java: 619)
at org.eclipse.equinox.launcher.Main.basicRun(Main.java:574)
at org.eclipse.equinox.launcher.Main.run(Main.java:1407)
at org.eclipse.equinox.launcher.Main.main(Main.java:1383)
15 Nov, 2010 9:35:27 AM org.eclipse.emf.mwe.core.WorkflowRunner logIssues
SEVERE: [ERROR]: Content is not allowed in prolog.(Element: workflow\TmptGenerator.mwe2; Reported by: -UNKNOWN-)
15 Nov, 2010 9:35:27 AM org.eclipse.emf.mwe.core.WorkflowRunner prepare
SEVERE: Workflow interrupted because of configuration errors. ------------------------------------------------------------ --------------

Any idea to resolve this problem.
Thanks in advance

Raj

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Re: How to run MWE2 workflow from my application [message #639126 is a reply to message #639044]

Mon, 15 November 2010 11:43

Karsten Thoms

Messages: 762
Registered: July 2009
Location: Dortmund, Germany

Senior Member

This indicates that .mwe2 files are recognized as EMF resources, but use the default XMIResource for loading. This should not be the case when MWE2 Runtime is configured properly, since this would assign .mwe2 with the special Resource implementation needed. Did you include the o.e.emf.mwe2.language.ui pluginin your target platform? This would do the necessary setup on activation.

Regards,
~Karsten

Need professional support for Xtext, EMF, Eclipse IDE?
Go to: http://devhub.karakun.com
Twitter : @kthoms
Blog : www.karsten-thoms.de

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Re: How to run MWE2 workflow from my application [message #639341 is a reply to message #639044]

Tue, 16 November 2010 07:55

Christian Dietrich

Messages: 14665
Registered: July 2009

Senior Member

Hello Raj, WorkflowRunner is for MWE (1) Workflows only. For Mwe2 use Mwe2Runner but note: there are currently bugs regarding running Mwe2 Workflows in an OSGi Environment.

~Christian

Twitter : @chrdietrich
Blog : https://www.dietrich-it.de

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