9:55 a.m.
Timothy Charman [https://community.jboss.org/people/tcharman] created the discussion
"XML Deserialization of Result Map Fails 5.4.0.Beta1"
To view the discussion, visit: https://community.jboss.org/message/772104#772104
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We are getting this exception:
16:12:52,091 ERROR [com.irdeto.taskhandler.AbstractTaskHandler] (pool-13-thread-1) An
exception occurred downstream of task ConfigurationTaskHandler: Configuration. This
likely occurred in a script task or gateway.:
com.thoughtworks.xstream.io.StreamException: : only whitespace content allowed before
start tag and not h (position: START_DOCUMENT seen h... @1:1)
at com.thoughtworks.xstream.io.xml.XppReader.pullNextEvent(XppReader.java:124)
[xstream-1.4.1.jar:]
at
com.thoughtworks.xstream.io.xml.AbstractPullReader.readRealEvent(AbstractPullReader.java:148)
[xstream-1.4.1.jar:]
at
com.thoughtworks.xstream.io.xml.AbstractPullReader.readEvent(AbstractPullReader.java:141)
[xstream-1.4.1.jar:]
at
com.thoughtworks.xstream.io.xml.AbstractPullReader.move(AbstractPullReader.java:118)
[xstream-1.4.1.jar:]
at
com.thoughtworks.xstream.io.xml.AbstractPullReader.moveDown(AbstractPullReader.java:103)
[xstream-1.4.1.jar:]
at com.thoughtworks.xstream.io.xml.XppReader.<init>(XppReader.java:63)
[xstream-1.4.1.jar:]
at
com.thoughtworks.xstream.io.xml.AbstractXppDriver.createReader(AbstractXppDriver.java:58)
[xstream-1.4.1.jar:]
at com.thoughtworks.xstream.XStream.fromXML(XStream.java:895)
[xstream-1.4.1.jar:]
at com.thoughtworks.xstream.XStream.fromXML(XStream.java:886)
[xstream-1.4.1.jar:]
at
org.drools.process.core.datatype.impl.type.ObjectDataType.readValue(ObjectDataType.java:77)
[drools-core-5.5.0.Beta1.jar:5.5.0.Beta1]
at
org.jbpm.workflow.instance.node.WorkItemNodeInstance.triggerCompleted(WorkItemNodeInstance.java:223)
[jbpm-flow-5.4.0-20120925.045710-447.jar:5.4.0-SNAPSHOT]
at
org.jbpm.workflow.instance.node.WorkItemNodeInstance.workItemCompleted(WorkItemNodeInstance.java:309)
[jbpm-flow-5.4.0-20120925.045710-447.jar:5.4.0-SNAPSHOT]
This is failing when jbpm-flow tries to deserialize the result map data on completing a
task. Some of the values we are mapping are URLs, e.g. "http..." so I'm
guessing that's where the "h" comes from in the exception.
This worked in an earlier version of jbpm 5.4.0-SNAPSHOT....
Any help much appreciated.
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11:57 a.m.
New subject: [jBPM] - Re: XML Deserialization of Result Map Fails 5.4.0.Beta1
Maciej Swiderski [https://community.jboss.org/people/swiderski.maciej] created the
discussion
"Re: XML Deserialization of Result Map Fails 5.4.0.Beta1"
To view the discussion, visit: https://community.jboss.org/message/772135#772135
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could you provide your property (process variable) definitions - this is where process
variable type is defined as 5.4 resolves variables based on its type to properly create
correct types such as Boolean, Integer, Float.
Take a look at following
https://github.com/droolsjbpm/jbpm/blob/master/jbpm-bpmn2/src/test/java/o...
test cases and one example of
https://github.com/droolsjbpm/jbpm/blob/master/jbpm-bpmn2/src/test/resour...
process definition
HTH
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3:55 p.m.
New subject: [jBPM] - Re: XML Deserialization of Result Map Fails 5.4.0.Beta1
Timothy Charman [https://community.jboss.org/people/tcharman] created the discussion
"Re: XML Deserialization of Result Map Fails 5.4.0.Beta1"
To view the discussion, visit: https://community.jboss.org/message/772186#772186
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Hi Maciej
Most are String, e.g.
<itemDefinition id="_9-sportClipMDItem" structureRef="String"
/>
Some are list, e.g.
<itemDefinition id="_9-sportclipListItem"
structureRef="java.util.List" />
We have a fair few that are our own fully qualified data structure objects, e.g.
<itemDefinition id="_40-contentMDListItem"
structureRef="com.test.domain.Envelope" />
I'm guessing the error we're getting comes from this one:
<itemDefinition id="_23-configItem"
structureRef="com.test.domain.CheckedMap" />
Is this what you are referring to?
Thanks
Tim
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11:45 p.m.
New subject: [jBPM] - Re: XML Deserialization of Result Map Fails 5.4.0.Beta1
Maciej Swiderski [https://community.jboss.org/people/swiderski.maciej] created the
discussion
"Re: XML Deserialization of Result Map Fails 5.4.0.Beta1"
To view the discussion, visit: https://community.jboss.org/message/772218#772218
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yes, this is what I asked for. This error will be thrown only if you have defined custom
type and you pass String as value for it thus it will try to use XStream to build an
object out of the string. Could you please attache simple test case for it or at least
describe in details on how you invoke it, mainly how you pass parameters (and what
parameters) when completing this work item.
HTH
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2:21 a.m.
New subject: [jBPM] - Re: XML Deserialization of Result Map Fails 5.4.0.Beta1
Timothy Charman [https://community.jboss.org/people/tcharman] created the discussion
"Re: XML Deserialization of Result Map Fails 5.4.0.Beta1"
To view the discussion, visit: https://community.jboss.org/message/772233#772233
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Hi Maciej
Thanks for the info, we'll fix the workflow. It is a shame that we don't have an
option to handle strings as content type String or Object.
Tim
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3:26 a.m.
New subject: [jBPM] - Re: XML Deserialization of Result Map Fails 5.4.0.Beta1
Maciej Swiderski [https://community.jboss.org/people/swiderski.maciej] created the
discussion
"Re: XML Deserialization of Result Map Fails 5.4.0.Beta1"
To view the discussion, visit: https://community.jboss.org/message/772256#772256
--------------------------------------------------------------
Tim, you can use String as content type it just requires to be configures as string type
in the item definition. Once you have custom type defined you need to either use that
object directly when providing result to your work item or provide xml representation as
string so XStream can build the object for you. If you use java.lang.Object as
structureRef it will use it as object without any type checks or transformations.
Let me know if there are any other concerns in this.
HTH
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3:44 a.m.
New subject: [jBPM] - Re: XML Deserialization of Result Map Fails 5.4.0.Beta1
Timothy Charman [https://community.jboss.org/people/tcharman] created the discussion
"Re: XML Deserialization of Result Map Fails 5.4.0.Beta1"
To view the discussion, visit: https://community.jboss.org/message/772257#772257
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Hi Maciej
So to be clear:
In my custom work item handler I do:
workItem.getResults().put("SomeKey", value);
where value is an object of a custom type, which is just some Java class e.g.
com.test.CustomType.
In my workflow I create a workflow variable where I use the Eclipse UI to select Object,
and set com.test.CustomType in the Classname field.
In my task's result map, I map my parameter named "SomeKey" to the workflow
variable.
At least that's what I've been doing so far with my older version of 5.4.0, which
has been working fine - do I need to do anything new now to make this CustomType work with
the new XStream approach?
Sorry for labouring this, but I'd love this to work!
Thanks
Tim
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4:27 a.m.
New subject: [jBPM] - Re: XML Deserialization of Result Map Fails 5.4.0.Beta1
Maciej Swiderski [https://community.jboss.org/people/swiderski.maciej] created the
discussion
"Re: XML Deserialization of Result Map Fails 5.4.0.Beta1"
To view the discussion, visit: https://community.jboss.org/message/772270#772270
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If you provide object of the custom type then XStream is not involved at all. XStream (or
any data type) will be involed only if the parameter is of type string as it will try to
build object representation based on string.
take a look at this example
https://github.com/droolsjbpm/jbpm/blob/master/jbpm-bpmn2/src/test/resour...
process definition it uses custom class as process variable for this you can either
execute it with object of type string (an xml representation of it) or give it directly
the instance of that type. Here is a corresponding
https://github.com/droolsjbpm/jbpm/blob/master/jbpm-bpmn2/src/test/java/o...
test case that uses string/xml representation but I just tired with instance of person
class and it works as expected.
Can you see any difference with your process or code used to complete work item?
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5:10 a.m.
New subject: [jBPM] - Re: XML Deserialization of Result Map Fails 5.4.0.Beta1
Timothy Charman [https://community.jboss.org/people/tcharman] created the discussion
"Re: XML Deserialization of Result Map Fails 5.4.0.Beta1"
To view the discussion, visit: https://community.jboss.org/message/772277#772277
--------------------------------------------------------------
OK, so Strings - 2 separate things we observe.
1. Using the eclipse editor, if I define the workflow variable as a String, then save,
close the workflow and edit the variable, it shows up as Object of class String, i.e. is
not consistent. I guess this is because in both cases it writes a
structureRef="String"
2. This code in WorkItemNodeInstance method triggerCompleted:
Object value = workItem.getResult(association.getSources().get(0));
if (value == null) {
try {
value = MVEL.eval(association.getSources().get(0), new
WorkItemResolverFactory(workItem));
} catch (Throwable t) {
// do nothing
}
}
Variable varDef =
variableScopeInstance.getVariableScope().findVariable(association.getTarget());
DataType dataType = varDef.getType();
// exclude java.lang.Object as it is considered unknown type
if (!dataType.getStringType().endsWith("java.lang.Object") && value
instanceof String) {
value = dataType.readValue((String) value);
}
variableScopeInstance.setVariable(association.getTarget(), value);
For my String structureRef variables, I see my XStream exception, so I know it is
hitting:
value = dataType.readValue((String) value);
So how am I meant to use a String that doesn't have XML in it...just a plain string
that I want to pass back to the workflow? The if statement:
if (!dataType.getStringType().endsWith("java.lang.Object") && value
instanceof String) {
says to execute this XStream method if the type is not defined as java.lang.Object (which
it isn't, it is defined as structureRef String) and the value is an instance of
String, which it is, I'm trying to pass a string back.
To me this appears like the code doesn't cater for handling strings that are not
representing serialized content...it appears that if we set the structureRef to
java.lang.Object then this will work, but I suspect we won't be able to use the
workflow variables in script tasks without casting back to String.
Thanks for all your help.
Tim
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5:30 a.m.
New subject: [jBPM] - Re: XML Deserialization of Result Map Fails 5.4.0.Beta1
Maciej Swiderski [https://community.jboss.org/people/swiderski.maciej] created the
discussion
"Re: XML Deserialization of Result Map Fails 5.4.0.Beta1"
To view the discussion, visit: https://community.jboss.org/message/772286#772286
--------------------------------------------------------------
ok, now I see what is wrong - Beta1 had indeed problem handling string types, it was fixed
just after it was out. Took me a while to find this out. I believe CR1 is now available
and that has it fixed for sure. Please have a try with 5.4.0.CR1
HTH
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