How to include extension jar to flowable modeler UI


#1

Dear Flowable Team,

I have created few custom user tasks and bundled in an extension which i need to include in flowable-modeler UI.

I am able to include them in the Eclipse designer and able to construct a custom workflow. When trying to import the custom workflow in flowable-modeler UI, its treating my custom tasks as default Service task.

Any help on this would be appreciated.

Thanks in advance.
Manjunath M T


Java Service Task in Designer / Modeler
#2

Hi Manjunath,

What I did on the process-test branch is that I created ne group Crystalball and several service tasks in it. There is also new subprocess type specified.
Have a look on the following link:

Simulation subprocess was defined like:

{
  "type": "node",
  "id": "SimulationSubProcess",
  "title": "Simulation sub process",
  "description": "A simulation sub process scope",
  "view": "<?xml version=\"1.0\" encoding=\"UTF-8\" standalone=\"no\"?>\n<svg\n   xmlns=\"http://www.w3.org/2000/svg\"\n   xmlns:svg=\"http://www.w3.org/2000/svg\"\n   xmlns:oryx=\"http://www.b3mn.org/oryx\"\n   xmlns:xlink=\"http://www.w3.org/1999/xlink\"\n   width=\"200\"\n   height=\"160\"\n   version=\"1.0\">\n  <defs></defs>\n  <oryx:magnets>\n  \t<oryx:magnet oryx:cx=\"1\" oryx:cy=\"50\" oryx:anchors=\"left\" />\n  \t<oryx:magnet oryx:cx=\"1\" oryx:cy=\"80\" oryx:anchors=\"left\" />\n  \t<oryx:magnet oryx:cx=\"1\" oryx:cy=\"110\" oryx:anchors=\"left\" />\n  \t\n  \t<oryx:magnet oryx:cx=\"70\" oryx:cy=\"159\" oryx:anchors=\"bottom\" />\n  \t<oryx:magnet oryx:cx=\"100\" oryx:cy=\"159\" oryx:anchors=\"bottom\" />\n  \t<oryx:magnet oryx:cx=\"130\" oryx:cy=\"159\" oryx:anchors=\"bottom\" />\n  \t\n  \t<oryx:magnet oryx:cx=\"199\" oryx:cy=\"50\" oryx:anchors=\"right\" />\n  \t<oryx:magnet oryx:cx=\"199\" oryx:cy=\"80\" oryx:anchors=\"right\" />\n  \t<oryx:magnet oryx:cx=\"199\" oryx:cy=\"110\" oryx:anchors=\"right\" />\n  \t\n  \t<oryx:magnet oryx:cx=\"70\" oryx:cy=\"1\" oryx:anchors=\"top\" />\n  \t<oryx:magnet oryx:cx=\"100\" oryx:cy=\"1\" oryx:anchors=\"top\" />\n  \t<oryx:magnet oryx:cx=\"130\" oryx:cy=\"1\" oryx:anchors=\"top\" />\n  \t\n  \t<oryx:magnet oryx:cx=\"100\" oryx:cy=\"80\" oryx:default=\"yes\" />\n  </oryx:magnets>\n  <g pointer-events=\"fill\" oryx:minimumSize=\"120 100\" oryx:maximumSize=\"\" >\n    <rect id=\"text_frame\" oryx:anchors=\"bottom top right left\" x=\"0\" y=\"0\" width=\"190\" height=\"160\" rx=\"10\" ry=\"10\" stroke=\"none\" stroke-width=\"0\" fill=\"none\" />\n\t<rect id=\"bg_frame\" oryx:anchors=\"bottom top right left\" x=\"0\" y=\"0\" width=\"200\" height=\"160\" rx=\"10\" ry=\"10\" stroke=\"#bbbbbb\" stroke-width=\"1\" fill=\"#ffffff\" />\n\t<rect id=\"border\" oryx:anchors=\"top bottom left right\" oryx:resize=\"vertical horizontal\" x=\"2.5\" y=\"2.5\" width=\"195\" height=\"155\" rx=\"8\" ry=\"8\" stroke=\"black\" stroke-width=\"1\" fill=\"none\" />\n\t<text \n\t\tfont-size=\"12\" \n\t\tid=\"text_name\" \n\t\tx=\"8\" \n\t\ty=\"10\" \n\t\toryx:align=\"top left\"\n\t\toryx:fittoelem=\"text_frame\"\n\t\toryx:anchors=\"left top\" \n\t\tstroke=\"#373e48\">\n\t</text>\n\t\n\t<g \tid=\"parallel\"\n\t\ttransform=\"translate(1)\">\n\t\t<path \n\t\t\tid=\"parallelpath\"\n\t\t\toryx:anchors=\"bottom\" \n\t\t\tfill=\"none\" stroke=\"#bbbbbb\" d=\"M96 145 v10 M100 145 v10 M104 145 v10\" \n\t\t\tstroke-width=\"2\"\n\t\t/>\n\t</g>\n\t<g \tid=\"sequential\"\n\t\ttransform=\"translate(1)\">\n\t\t<path \n\t\t\tid=\"sequentialpath\"\n\t\t\toryx:anchors=\"bottom\" \n\t\t\tfill=\"none\" stroke=\"#bbbbbb\" stroke-width=\"2\" d=\"M95,154h10 M95,150h10 M95,146h10\"\n\t\t/>\n\t</g>\n  </g>\n</svg>",
  "icon": "activity/expanded.subprocess.png",
  "groups": [
    "Crystalball"
  ],
  "propertyPackages": [
    "overrideidpackage",
    "namepackage",
    "documentationpackage",
    "asynchronousdefinitionpackage",
    "exclusivedefinitionpackage",
    "executionlistenerspackage",
    "multiinstance_typepackage",
    "multiinstance_cardinalitypackage",
    "multiinstance_collectionpackage",
    "multiinstance_variablepackage",
    "multiinstance_conditionpackage",
    "istransactionpackage",
    "virtual_engine_configuration_package"
  ],
  "hiddenPropertyPackages": [],
  "roles": [
    "Activity",
    "sequence_start",
    "sequence_end",
    "all"
  ]
},

the most important property is virtual_engine_configuration_package

{
    "name" : "virtual_engine_configuration_package",
    "properties" : [ {
      "id" : "virtual_engine_configuration",
      "type" : "String",
      "title" : "Virtual engine configuration",
      "value" : "",
      "description" : "Path to the resource with virtual engine configuration.",
      "popular" : true,
      "refToView" : "border"
    }

the xml representation after the conversion from json is:

<subProcess id="subProcess" >
      <extensionElements>
        <flowable:type>simulation</flowable:type>
        <flowable:virtualEngineConfiguration><![CDATA[${virtualEngineCfg}]]></flowable:virtualEngineConfiguration>
      </extensionElements>

I would say you need to do something similar with service tasks in the stencilset_bpmn.json palette.

Regards
Martin


#3

Thanks @martin.grofcik for your quick response.

Actually i am looking for and easy way to import/include my extension jar to flowable-modeler so that i can able to see the custom built tasks in the flowable-modeler palette.


#4

Hi @martin.grofcik

I have followed your steps. Created the packages and associated the packages to node. Getting below error while validating the bpmn process after placing my component to stencil in modeler.

Error:
Invalid reference in diagram interchange definition: could not find sid-83C46F1C-F907-45EA-B722-3235098D086A

Could you please help what have i missed?


#5

Really hard to say. Any stack trace or jUnit test?

Martin


#6

Hi @martin.grofcik

Please find below stacktrace:

11:06:12,887 [http-nio-8080-exec-10] ERROR org.flowable.editor.language.json.converter.BpmnJsonConverter  - Error converting DMTask
java.lang.NullPointerException
        at org.flowable.editor.language.json.converter.BpmnJsonConverter.processJsonElements(BpmnJsonConverter.java:685)
        at org.flowable.editor.language.json.converter.BpmnJsonConverter.convertToBpmnModel(BpmnJsonConverter.java:586)
        at org.flowable.editor.language.json.converter.BpmnJsonConverter.convertToBpmnModel(BpmnJsonConverter.java:443)
        at org.flowable.app.service.editor.BpmnDisplayJsonConverter.processProcessElements(BpmnDisplayJsonConverter.java:95)
        at org.flowable.app.rest.editor.EditorDisplayJsonClientResource.getModelJSON(EditorDisplayJsonClientResource.java:53)
        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
        at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
        at java.lang.reflect.Method.invoke(Method.java:498)
        at org.springframework.web.method.support.InvocableHandlerMethod.doInvoke(InvocableHandlerMethod.java:205)
        at org.springframework.web.method.support.InvocableHandlerMethod.invokeForRequest(InvocableHandlerMethod.java:133)
        at org.springframework.web.servlet.mvc.method.annotation.ServletInvocableHandlerMethod.invokeAndHandle(ServletInvocableHandlerMethod.java
:97)
        at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.invokeHandlerMethod(RequestMappingHandlerAdapter.ja
va:827)
        at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.handleInternal(RequestMappingHandlerAdapter.java:73
8)
        at org.springframework.web.servlet.mvc.method.AbstractHandlerMethodAdapter.handle(AbstractHandlerMethodAdapter.java:85)
        at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:967)
        at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:901)
        at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:970)
        at org.springframework.web.servlet.FrameworkServlet.doGet(FrameworkServlet.java:861)
        at javax.servlet.http.HttpServlet.service(HttpServlet.java:635)
        at org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:846)
        at javax.servlet.http.HttpServlet.service(HttpServlet.java:742)
        at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:230)
        at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:165)
        at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52)
        at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:192)
        at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:165)
        at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:317)
        at org.springframework.security.web.access.intercept.FilterSecurityInterceptor.invoke(FilterSecurityInterceptor.java:127)
        at org.springframework.security.web.access.intercept.FilterSecurityInterceptor.doFilter(FilterSecurityInterceptor.java:91)
        at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:331)
        at org.springframework.security.web.access.ExceptionTranslationFilter.doFilter(ExceptionTranslationFilter.java:114)
        at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:331)
        at org.springframework.security.web.session.SessionManagementFilter.doFilter(SessionManagementFilter.java:137)
        at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:331)
        at org.springframework.security.web.authentication.AnonymousAuthenticationFilter.doFilter(AnonymousAuthenticationFilter.java:111)
        at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:331)
        at org.springframework.security.web.servletapi.SecurityContextHolderAwareRequestFilter.doFilter(SecurityContextHolderAwareRequestFilter.j
ava:170)
        at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:331)
        at org.springframework.security.web.savedrequest.RequestCacheAwareFilter.doFilter(RequestCacheAwareFilter.java:63)
        at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:331)
        at org.flowable.app.filter.FlowableCookieFilter.doFilterInternal(FlowableCookieFilter.java:156)
        at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107)
        at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:331)
        at org.springframework.security.web.authentication.logout.LogoutFilter.doFilter(LogoutFilter.java:116)
        at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:331)
        at org.springframework.security.web.header.HeaderWriterFilter.doFilterInternal(HeaderWriterFilter.java:64)
        at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107)
        at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:331)
        at org.springframework.security.web.context.SecurityContextPersistenceFilter.doFilter(SecurityContextPersistenceFilter.java:105)
        at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:331)
        at org.springframework.security.web.context.request.async.WebAsyncManagerIntegrationFilter.doFilterInternal(WebAsyncManagerIntegrationFil
ter.java:56)
        at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107)
        at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:331)
        at org.springframework.security.web.FilterChainProxy.doFilterInternal(FilterChainProxy.java:214)
        at org.springframework.security.web.FilterChainProxy.doFilter(FilterChainProxy.java:177)
        at org.springframework.web.filter.DelegatingFilterProxy.invokeDelegate(DelegatingFilterProxy.java:346)
        at org.springframework.web.filter.DelegatingFilterProxy.doFilter(DelegatingFilterProxy.java:262)
        at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:192)
        at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:165)
        at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:198)
        at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:96)
        at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:140)
        at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:80)
        at org.apache.catalina.valves.AbstractAccessLogValve.invoke(AbstractAccessLogValve.java:624)
        at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:87)
        at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:341)
        at org.apache.coyote.http11.Http11Processor.service(Http11Processor.java:799)
        at org.apache.coyote.AbstractProcessorLight.process(AbstractProcessorLight.java:66)
        at org.apache.coyote.AbstractProtocol$ConnectionHandler.process(AbstractProtocol.java:861)
        at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1455)
        at org.apache.tomcat.util.net.SocketProcessorBase.run(SocketProcessorBase.java:49)
        at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
        at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
        at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)
        at java.lang.Thread.run(Thread.java:748)
08:14:26,822 [HikariPool-1 housekeeper] WARN  com.zaxxer.hikari.pool.HikariPool  - 9h8m20s378ms993?s332ns - Thread starvation or clock leap detec
ted (housekeeper delta=HikariPool-1).
08:17:13,034 [http-nio-8080-exec-10] ERROR org.flowable.editor.language.json.converter.BpmnJsonConverter  - Error converting DMTask
java.lang.NullPointerException
        at org.flowable.editor.language.json.converter.BpmnJsonConverter.processJsonElements(BpmnJsonConverter.java:685)
        at org.flowable.editor.language.json.converter.BpmnJsonConverter.convertToBpmnModel(BpmnJsonConverter.java:586)
        at org.flowable.editor.language.json.converter.BpmnJsonConverter.convertToBpmnModel(BpmnJsonConverter.java:443)
        at org.flowable.app.rest.editor.ModelValidationRestResource.validate(ModelValidationRestResource.java:40)
        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
        at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
        at java.lang.reflect.Method.invoke(Method.java:498)
        at org.springframework.web.method.support.InvocableHandlerMethod.doInvoke(InvocableHandlerMethod.java:205)
        at org.springframework.web.method.support.InvocableHandlerMethod.invokeForRequest(InvocableHandlerMethod.java:133)
        at org.springframework.web.servlet.mvc.method.annotation.ServletInvocableHandlerMethod.invokeAndHandle(ServletInvocableHandlerMethod.java
:97)
        at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.invokeHandlerMethod(RequestMappingHandlerAdapter.ja
va:827)
        at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.handleInternal(RequestMappingHandlerAdapter.java:73
8)
        at org.springframework.web.servlet.mvc.method.AbstractHandlerMethodAdapter.handle(AbstractHandlerMethodAdapter.java:85)
        at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:967)
        at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:901)
        at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:970)
        at org.springframework.web.servlet.FrameworkServlet.doPost(FrameworkServlet.java:872)
        at javax.servlet.http.HttpServlet.service(HttpServlet.java:661)
        at org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:846)
        at javax.servlet.http.HttpServlet.service(HttpServlet.java:742)
        at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:230)
        at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:165)
        at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52)
        at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:192)
        at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:165)
        at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:317)
        at org.springframework.security.web.access.intercept.FilterSecurityInterceptor.invoke(FilterSecurityInterceptor.java:127)
        at org.springframework.security.web.access.intercept.FilterSecurityInterceptor.doFilter(FilterSecurityInterceptor.java:91)
        at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:331)
        at org.springframework.security.web.access.ExceptionTranslationFilter.doFilter(ExceptionTranslationFilter.java:114)
        at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:331)
        at org.springframework.security.web.session.SessionManagementFilter.doFilter(SessionManagementFilter.java:137)
        at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:331)
        at org.springframework.security.web.authentication.AnonymousAuthenticationFilter.doFilter(AnonymousAuthenticationFilter.java:111)
        at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:331)
        at org.springframework.security.web.servletapi.SecurityContextHolderAwareRequestFilter.doFilter(SecurityContextHolderAwareRequestFilter.j
ava:170)
        at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:331)
        at org.springframework.security.web.savedrequest.RequestCacheAwareFilter.doFilter(RequestCacheAwareFilter.java:63)
        at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:331)
        at org.flowable.app.filter.FlowableCookieFilter.doFilterInternal(FlowableCookieFilter.java:156)
        at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107)
        at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:331)
        at org.springframework.security.web.authentication.logout.LogoutFilter.doFilter(LogoutFilter.java:116)
        at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:331)
        at org.springframework.security.web.header.HeaderWriterFilter.doFilterInternal(HeaderWriterFilter.java:64)
        at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107)
        at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:331)
        at org.springframework.security.web.context.SecurityContextPersistenceFilter.doFilter(SecurityContextPersistenceFilter.java:105)
        at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:331)
        at org.springframework.security.web.context.request.async.WebAsyncManagerIntegrationFilter.doFilterInternal(WebAsyncManagerIntegrationFil
ter.java:56)
        at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107)
        at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:331)
        at org.springframework.security.web.FilterChainProxy.doFilterInternal(FilterChainProxy.java:214)
        at org.springframework.security.web.FilterChainProxy.doFilter(FilterChainProxy.java:177)
        at org.springframework.web.filter.DelegatingFilterProxy.invokeDelegate(DelegatingFilterProxy.java:346)
        at org.springframework.web.filter.DelegatingFilterProxy.doFilter(DelegatingFilterProxy.java:262)
        at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:192)
        at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:165)
        at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:198)
        at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:96)
        at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:140)
        at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:80)
        at org.apache.catalina.valves.AbstractAccessLogValve.invoke(AbstractAccessLogValve.java:624)
        at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:87)
        at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:341)
        at org.apache.coyote.http11.Http11Processor.service(Http11Processor.java:799)
        at org.apache.coyote.AbstractProcessorLight.process(AbstractProcessorLight.java:66)
        at org.apache.coyote.AbstractProtocol$ConnectionHandler.process(AbstractProtocol.java:861)
        at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1455)
        at org.apache.tomcat.util.net.SocketProcessorBase.run(SocketProcessorBase.java:49)
        at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
        at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
        at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)
        at java.lang.Thread.run(Thread.java:748)

Below is the stencilset_bpmn.json changes.

   {
            "type": "node",
            "id": "DMTask",
            "title": "DM task",
            "description": "An automatic task with service logic",
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                "Activities"
            ],
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            "hiddenPropertyPackages": [],
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                }
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                    "id": "dmRequest",
                    "type": "String",
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                    "value": "",
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                    "popular": true
                }
            ]
        },
        {
            "name": "dmresponsepackage",
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                {
                    "id": "dmResponse",
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        }


#7

It seems that

for (JsonNode shapeNode : shapesArrayNode) {

shapesArrayNode is null. It’s hard to guess why. The best way to find and solve this problem is to debug it.

Martin