When Iam using flowable version 6.7.2 it is working perfectly fine with below scenario
my delegate class Iam setting a service url like below execution.setVaraible(“url”, http://localhost/restApi) and in my http task in flowable ui Iam using request url as
<flowable:field name=“requestUrl”>
<flowable:expression><![CDATA[${url}]]></flowable:expression>
</flowable:field>
But when I upgraded the version to 6.8.0 Iam getting null value in my http task
Hey @Venkata,
Can you please provide a minimal reproducible example showing this problem? I do not see a reason why this wouldn’t work.
Cheers,
Filip
Thanks @filiphr for your response.
In my delegate class, iam using execution.setVaraible(“url”, http://localhost/restApi);
in my flowable using below in process work flow.
<serviceTask id="assignuser" name="assignuser" flowable:parallelInSameTransaction="true" flowable:type="http">
<extensionElements>
<flowable:field name="requestMethod">
<flowable:string><![CDATA[GET]]></flowable:string>
</flowable:field>
<flowable:field name="requestUrl">
<flowable:expression><![CDATA[${url}]]></flowable:expression>
</flowable:field>
<flowable:field name="requestHeaders">
<flowable:string><![CDATA[content-type: application/json]]></flowable:string>
</flowable:field>
</extensionElements>
</serviceTask>
This is working with version 6.7.2 but not with 6.8.0. Getting NPE when iam using the ${url}.
Can you please share your entire stacktrace that you are getting? The XML snippet you shared looks fine.
Cheers,
Filip
Here is the error details @filiphr
Error while closing command context.
java.lang.NullPointerException: null
at java.util.concurrent.CompletableFuture.screenExecutor(Unknown Source) ~[na:1.8.0_321]
at java.util.concurrent.CompletableFuture.supplyAsync(Unknown Source) ~[na:1.8.0_321]
at org.flowable.common.engine.impl.async.DefaultAsyncTaskExecutor.submit(DefaultAsyncTaskExecutor.java:89) ~[flowable-engine-common-6.8.0.jar!/:6.8.0]
at org.flowable.common.engine.impl.async.DefaultAsyncTaskInvoker.submit(DefaultAsyncTaskInvoker.java:40) ~[flowable-engine-common-6.8.0.jar!/:6.8.0]
at org.flowable.http.common.impl.BaseHttpActivityDelegate.prepareAndExecuteRequest(BaseHttpActivityDelegate.java:223) ~[flowable-http-common-6.8.0.jar!/:6.8.0]
at org.flowable.engine.impl.bpmn.http.DefaultBpmnHttpActivityDelegate.execute(DefaultBpmnHttpActivityDelegate.java:111) ~[flowable-engine-6.8.0.jar!/:6.8.0]
at org.flowable.engine.impl.delegate.invocation.FutureJavaDelegateInvocation.invoke(FutureJavaDelegateInvocation.java:38) ~[flowable-engine-6.8.0.jar!/:6.8.0]
at org.flowable.engine.impl.delegate.invocation.DelegateInvocation.proceed(DelegateInvocation.java:32) ~[flowable-engine-6.8.0.jar!/:6.8.0]
at org.flowable.engine.impl.delegate.invocation.DefaultDelegateInterceptor.handleInvocation(DefaultDelegateInterceptor.java:26) ~[flowable-engine-6.8.0.jar!/:6.8.0]
at org.flowable.engine.impl.bpmn.behavior.ServiceTaskFutureJavaDelegateActivityBehavior.execute(ServiceTaskFutureJavaDelegateActivityBehavior.java:120) ~[flowable-engine-6.8.0.jar!/:6.8.0]
at org.flowable.engine.impl.bpmn.helper.ClassDelegate.execute(ClassDelegate.java:194) ~[flowable-engine-6.8.0.jar!/:6.8.0]
at org.flowable.engine.impl.agenda.ContinueProcessOperation.executeActivityBehavior(ContinueProcessOperation.java:298) ~[flowable-engine-6.8.0.jar!/:6.8.0]
at org.flowable.engine.impl.agenda.ContinueProcessOperation.executeSynchronous(ContinueProcessOperation.java:175) ~[flowable-engine-6.8.0.jar!/:6.8.0]
at org.flowable.engine.impl.agenda.ContinueProcessOperation.continueThroughFlowNode(ContinueProcessOperation.java:125) ~[flowable-engine-6.8.0.jar!/:6.8.0]
at org.flowable.engine.impl.agenda.ContinueProcessOperation.run(ContinueProcessOperation.java:88) ~[flowable-engine-6.8.0.jar!/:6.8.0]
at org.flowable.common.engine.impl.AbstractEngineConfiguration.lambda$new$0(AbstractEngineConfiguration.java:195) ~[flowable-engine-common-6.8.0.jar!/:6.8.0]
at org.flowable.engine.impl.interceptor.CommandInvoker.executeOperation(CommandInvoker.java:130) ~[flowable-engine-6.8.0.jar!/:6.8.0]
at org.flowable.engine.impl.interceptor.CommandInvoker.executeOperations(CommandInvoker.java:114) ~[flowable-engine-6.8.0.jar!/:6.8.0]
at org.flowable.engine.impl.interceptor.CommandInvoker.execute(CommandInvoker.java:72) ~[flowable-engine-6.8.0.jar!/:6.8.0]
at org.flowable.engine.impl.interceptor.BpmnOverrideContextInterceptor.execute(BpmnOverrideContextInterceptor.java:26) ~[flowable-engine-6.8.0.jar!/:6.8.0]
at org.flowable.common.engine.impl.interceptor.TransactionContextInterceptor.execute(TransactionContextInterceptor.java:53) ~[flowable-engine-common-6.8.0.jar!/:6.8.0]
at org.flowable.common.engine.impl.interceptor.CommandContextInterceptor.execute(CommandContextInterceptor.java:105) ~[flowable-engine-common-6.8.0.jar!/:6.8.0]
at org.flowable.common.spring.SpringTransactionInterceptor.lambda$execute$0(SpringTransactionInterceptor.java:57) [flowable-spring-common-6.8.0.jar!/:6.8.0]
at org.springframework.transaction.support.TransactionTemplate.execute(TransactionTemplate.java:140) ~[spring-tx-5.3.24.jar!/:5.3.24]
at org.flowable.common.spring.SpringTransactionInterceptor.execute(SpringTransactionInterceptor.java:57) [flowable-spring-common-6.8.0.jar!/:6.8.0]
The null pointer seems to be coming due to the executor service being null. How are you creating the engine? Can you please share a minimal reproducible project?