September 2008 - jbpm-dev - Jboss List Archives

[Design of JBoss jBPM] - Re: jBPM Classloading

by camunda

Hi Bjoern, did you use the proposed solution in your project? I wanted to use it for an own problem with classloading (and I can also commit it back to jbpm after it works correctly) but have the problem, that this is leading to and endless loop, since the classloader is already needed to load the jbpm.cfg.xml in the JbpmConfiguration (InputStream jbpmCfgXmlStream = ClassLoaderUtil.getStream(resource);). Exception StackTrace: | at org.jbpm.util.ClassLoaderUtil.getClassLoader(ClassLoaderUtil.java:50) | at org.jbpm.util.ClassLoaderUtil.getStream(ClassLoaderUtil.java:83) | at org.jbpm.JbpmConfiguration.getInstance(JbpmConfiguration.java:279) | at org.jbpm.JbpmConfiguration.getInstance(JbpmConfiguration.java:257) | at org.jbpm.JbpmConfiguration$Configs.getObjectFactory(JbpmConfiguration.java:418) | at org.jbpm.JbpmConfiguration$Configs.hasObject(JbpmConfiguration.java:426) | at org.jbpm.util.ClassLoaderUtil.getClassLoader(ClassLoaderUtil.java:50) | How did you solve this? Thanks Bernd View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4178371#4178371 Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&p=4178371

16 years, 2 months

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[Design of JBoss jBPM] - add

by camunda

Hi. I found a not so nice design detail of the CommandService: The Command.execute throws an Exception, the CommandService.execute not. I think either both or none should add "throws Exception" to the signature. But I think it would not be the best idea to change the signature of the CommandService now, what do you guys think? Maybe this should be addressed in the PVM? Or do you think it is fine like this? Cheers Bernd View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4178351#4178351 Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&p=4178351

16 years, 2 months

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[Design of JBoss jBPM] - Re: What's the future of jBPM BAM console?

by heiko.braun＠jboss.com

See also http://www.jboss.com/index.html?module=bb&op=viewtopic&t=142861 View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4178246#4178246 Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&p=4178246

16 years, 2 months

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[Design of JBoss jBPM] - gwt-console in distribution

by heiko.braun＠jboss.com

The new gwt console[1] is now included in the distribution [2]. It currently works on mock rpc services, but I will finish the process management soon. We can then have both consoles running in parallel, working on the same jbpm instance. [1] http://jboss-overlord.blogspot.com/2008/08/first-glimpse-at-new-bpm-conso... [2] http://jbpm.dyndns.org/jbpmwiki/index.php?title=JBPM3BuildingTheInstaller Stay tuned. View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4178244#4178244 Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&p=4178244

16 years, 2 months

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[Design of JBoss jBPM] - Re: Expression Evaluation in ActionHandler Properties

by brittm

(I've posted this against the JIRA issue, but I'm also posting it here for any who might be searching/following the thread.) I have a fear that automatic expression evaluation for ActionHandler configuration could interfere with the ability to solve some interesting problems. I'll provide an example below. A recommendation: Rather than hard coding the expression handling logic, provide an example of a base class that users can extend if they want to take advantage of expression handling/syntax in any of their Handlers. With a base class, users can take advantage of expression handling when they want to, customize it if they need to, or intentionally ignore it. Below is a class that I use consistently--if you like it, just re-brand it, re-write it or whatever you like. As an example of customizing the handling of expressions, this particular class provides a specialized 'concatenateEL' method--for instance, if you want to assign swimlanes to a particular Sales queue based on Market, in your AssignmentHandler configuration you could write <group>Sales-#{market}</group> which would evaluate to something like "Sales-London". The stock JbpmExpressionEvaluator doesn't provide for this type of evaluation (and I really don't know if it should.) No, this is not completely automatic for the user, they have to call one of the methods from their Handler, but it does allow them much more flexibility. | /* | * GenericHandler.java | * Created on April 1, 2008, 7:06 PM | * Copyright 2008, Britt Miner. | */ | package org.bminer.jbpm.pd; | | import java.util.regex.*; | import org.jbpm.graph.exe.ExecutionContext; | import org.jbpm.jpdl.el.impl.JbpmExpressionEvaluator; | | /** | * @author bminer | */ | public abstract class GenericHandler { | | // Prepare to identify any EL expressions, #{...}, regex: "#\{.*?}" | String elPatternStr = "#\\{.*?}"; | Pattern elPattern = Pattern.compile(elPatternStr); | | protected String conditionExpression = null; | | /* Evaluate the input as a possible EL expression. */ | protected Object evaluateEL(String inputStr, ExecutionContext ec) { | if (inputStr == null) { | return null; | } | | Matcher matcher = elPattern.matcher(inputStr); | if (matcher.matches()) { //input is one big EL expression | return JbpmExpressionEvaluator.evaluate(inputStr, ec); | } else { | return inputStr; | } | } | | /* Treats input as a possible series of EL expressions and concatenates what | * is found. | */ | protected String concatenateEL(String inputStr, ExecutionContext ec) { | if (inputStr == null) { | return null; | } | | Matcher matcher = elPattern.matcher(inputStr); | StringBuffer buf = new StringBuffer(); | while (matcher.find()) { | // Get the match result | String elExpr = matcher.group(); | // Evaluate EL expression | Object o = JbpmExpressionEvaluator.evaluate(elExpr, ec); | String elValue = ""; | if (o != null) { | elValue = String.valueOf(JbpmExpressionEvaluator.evaluate(elExpr, ec)); | } | // Insert the calculated value in place of the EL expression | matcher.appendReplacement(buf, elValue); | } | matcher.appendTail(buf); | | // Deliver result | if (buf.length() > 0) { | return buf.toString(); | } else { | return null; | } | } | | /* Returns true if the value is a String which contains the pattern delineating | * an EL expression. | */ | protected boolean hasEL(Object value) { | if (value instanceof String) { | Matcher matcher = elPattern.matcher((String) value); | return matcher.find(); | } | return false; | } | | /* Returns true if the value is a String which in its entirety composes | * one EL expression. | */ | protected boolean isEL(Object value) { | if (value instanceof String) { | Matcher matcher = elPattern.matcher((String) value); | return matcher.matches(); | } | return false; | } | | public void setConditionExpression(String condition) { | this.conditionExpression = condition; | } | | public void setCondition(String condition) { | this.conditionExpression = condition; | } | } View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4178088#4178088 Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&p=4178088

16 years, 2 months

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[Design of JBoss jBPM] - Re: What's the future of jBPM BAM console?

by heiko.braun＠jboss.com

SAM is the big picture. But short term goals are to replace the existing jBPM console with a GWT one and provide initial BI capabilities. From this we'll plan to grow a full fledged BAM solution that overlaps with SAM to a certain degree. If you want to help out, we can always use a hand ;) View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4178067#4178067 Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&p=4178067

16 years, 2 months

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[Design of JBoss jBPM] - Re: Cancelling a task fires task-end event

by tom.baeyens＠jboss.com

it is almost impossible to come up with a task lifecycle that satisfies all use cases. typically companies have their own view upon the task lifecycle. probably the generation of the task-end event is that cancellation also has to end the task. as usually cancallation of the task should not cancel the whole process instance. which exact events need to be fired when is certainly that we can have a debate about for jbpm 4. jbpm 3 should be kept stable. in jbpm 4, the task lifecycle is pluggable. it's a PVM process itself. (embeddable execution mode). so we should come up with the most general purpose task lifecycle that users then easily can tweak to their purposes. View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4177861#4177861 Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&p=4177861

16 years, 2 months

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[Design of JBoss jBPM] - Cancelling a task fires task-end event

by kukeltje

I know there is no task-cancel event, but having a task-end event on cancelling a task does not feel right. Any thought? View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4177815#4177815 Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&p=4177815

16 years, 2 months

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[Design of JBoss jBPM] - jbpm-3.3.0.CR1

by thomas.diesler＠jboss.com

Dear Folks, I am pleased to announce that we have just released jbpm-3.3.0.CR1. This release was mainly about productization issues like * SVN source repository * Maven build system * Automated Hudson QA * IzPack based Installer * Defined set of target containers * Defined set of target databases * Bug fixes Prove that we actually did it is here in our Hudson Matrix http://jbpm.dyndns.org:8280/hudson/job/jBPM-Matrix More detailed Release Notes are here https://jira.jboss.org/jira/secure/ReleaseNote.jspa?projectId=10052&style... Finally I'd like to thank everybody who helped to make this release happen. cheers -thomas View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4177737#4177737 Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&p=4177737

16 years, 2 months

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'New' wiki down for almost 2 days

by Ronald van Kuijk

Guys (I'd like to say galls to, come on Tom... ;-)) http://jbpm.dyndns.org/jbpmwiki has been down for almost 2 days now (I think). I get into discussions with people for directing them to non-existent information. Can someone check that out?

16 years, 2 months

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jbpm-dev September 2008