jmeter In JMeter getting error while generating request payload data dynamically with Groovy

[dipak]

This is the request JSON

{
"Transaction": {
"TrType": "Vehicle",
"CustomerType": "${__chooseRandom(Individual,Company,)}",
},
"IndividualClient": {
"firstName": "test first name",
"lastName": "test last name"
}
"CompanyClient": {
"CompanyName": "test company name",
}
}

So if customer type = Individual then generate Individual else generate Company.

I used JSR223 Pre-Processor and in that.

import groovy.json.JsonOutput
import groovy.json.JsonSlurper
import groovy.json.JsonBuilder

def jsonRequest = null

JsonSlurper jsonSlurper = new JsonSlurper()
jsonRequest = jsonSlurper.parseText(sampler.getArguments().getArgument(0).getValue())

println(JsonOutput.prettyPrint(JsonOutput.toJson(jsonRequest)))

if (jsonRequest.Transaction.CustomerType.equalsIgnoreCase("Individual")) {

jsonBuilder = new JsonBuilder()
jsonBuilder.IndividualClient {
firstName "test first name"
lastName "test last name"
}
vars.put("customertypedetails",jsonBuilder.toPrettyString())
println(vars.get("customertypedetails"))
} else {
jsonBuilder2 = new JsonBuilder()
jsonBuilder2.CompanyClient {
companyName "test company name"
}
vars.put("customertypedetails",jsonBuilder2.toPrettyString())
println(vars.get("customertypedetails"))
}

This ${customertypedetails} i am using in my JSON as;

{
"Transaction": {
"TrType": "Vehicle",
"CustomerType": "${__chooseRandom(Individual,Company,)}",
},
${customertypedetails}
}

2018-03-28 18:06:42,342 ERROR o.a.j.m.JSR223PreProcessor: Problem in JSR223 script, JSR223 PreProcessor
javax.script.ScriptException: javax.script.ScriptException: groovy.json.JsonException: expecting '}' or ',' but got current char '$' with an int value of 36

The current character read is '$' with an int value of 36
expecting '}' or ',' but got current char '$' with an int value of 36
line number 12
index number 305
${newcustomertypedetails}
..^
at org.codehaus.groovy.jsr223.GroovyScriptEngineImpl.eval(GroovyScriptEngineImpl.java:158) ~[groovy-all-2.4.13.jar:2.4.13]
at javax.script.AbstractScriptEngine.eval(Unknown Source) ~[?:1.8.0_161]
at org.apache.jmeter.util.JSR223TestElement.processFileOrScript(JSR223TestElement.java:223) ~[ApacheJMeter_core.jar:4.0 r1823414]
at org.apache.jmeter.modifiers.JSR223PreProcessor.process(JSR223PreProcessor.java:44) [ApacheJMeter_components.jar:4.0 r1823414]
at org.apache.jmeter.threads.JMeterThread.runPreProcessors(JMeterThread.java:849) [ApacheJMeter_core.jar:4.0 r1823414]
at org.apache.jmeter.threads.JMeterThread.executeSamplePackage(JMeterThread.java:467) [ApacheJMeter_core.jar:4.0 r1823414]
at org.apache.jmeter.threads.JMeterThread.processSampler(JMeterThread.java:416) [ApacheJMeter_core.jar:4.0 r1823414]
at org.apache.jmeter.threads.JMeterThread.run(JMeterThread.java:250) [ApacheJMeter_core.jar:4.0 r1823414]
at java.lang.Thread.run(Unknown Source) [?:1.8.0_161]
Caused by: javax.script.ScriptException: groovy.json.JsonException: expecting '}' or ',' but got current char '$' with an int value of 36

The current character read is '$' with an int value of 36
expecting '}' or ',' but got current char '$' with an int value of 36
line number 12
index number 305
${newcustomertypedetails}
..^
at org.codehaus.groovy.jsr223.GroovyScriptEngineImpl.eval(GroovyScriptEngineImpl.java:320) ~[groovy-all-2.4.13.jar:2.4.13]
at org.codehaus.groovy.jsr223.GroovyScriptEngineImpl.eval(GroovyScriptEngineImpl.java:155) ~[groovy-all-2.4.13.jar:2.4.13]
... 8 more
Caused by: groovy.json.JsonException: expecting '}' or ',' but got current char '$' with an int value of 36

The current character read is '$' with an int value of 36
expecting '}' or ',' but got current char '$' with an int value of 36
line number 12
index number 305
${newcustomertypedetails}
..^
at groovy.json.internal.JsonParserCharArray.complain(JsonParserCharArray.java:153) ~[groovy-all-2.4.13.jar:2.4.13]
at groovy.json.internal.JsonParserCharArray.decodeJsonObject(JsonParserCharArray.java:144) ~[groovy-all-2.4.13.jar:2.4.13]
at groovy.json.internal.JsonParserCharArray.decodeValueInternal(JsonParserCharArray.java:186) ~[groovy-all-2.4.13.jar:2.4.13]
at groovy.json.internal.JsonParserCharArray.decodeValue(JsonParserCharArray.java:157) ~[groovy-all-2.4.13.jar:2.4.13]
at groovy.json.internal.JsonParserCharArray.decodeFromChars(JsonParserCharArray.java:46) ~[groovy-all-2.4.13.jar:2.4.13]
at groovy.json.internal.JsonParserCharArray.parse(JsonParserCharArray.java:384) ~[groovy-all-2.4.13.jar:2.4.13]
at groovy.json.internal.BaseJsonParser.parse(BaseJsonParser.java:107) ~[groovy-all-2.4.13.jar:2.4.13]
at groovy.json.JsonSlurper.parseText(JsonSlurper.java:205) ~[groovy-all-2.4.13.jar:2.4.13]
at groovy.json.JsonSlurper$parseText.call(Unknown Source) ~[?:?]
at org.codehaus.groovy.runtime.callsite.CallSiteArray.defaultCall(CallSiteArray.java:48) ~[groovy-all-2.4.13.jar:2.4.13]
at org.codehaus.groovy.runtime.callsite.AbstractCallSite.call(AbstractCallSite.java:113) ~[groovy-all-2.4.13.jar:2.4.13]
at org.codehaus.groovy.runtime.callsite.AbstractCallSite.call(AbstractCallSite.java:125) ~[groovy-all-2.4.13.jar:2.4.13]
at Script52.run(Script52.groovy:12) ~[?:?]
at org.codehaus.groovy.jsr223.GroovyScriptEngineImpl.eval(GroovyScriptEngineImpl.java:317) ~[groovy-all-2.4.13.jar:2.4.13]
at org.codehaus.groovy.jsr223.GroovyScriptEngineImpl.eval(GroovyScriptEngineImpl.java:155) ~[groovy-all-2.4.13.jar:2.4.13]
... 8 more
2018-03-28 18:06:45,352 INFO o.a.j.t.JMeterThread: Thread is done: TG - Create Transaction 2-1
2018-03-28 18:06:45,353 INFO o.a.j.t.JMeterThread: Thread finished: TG - Create Transaction 2-1
2018-03-28 18:06:45,498 INFO o.a.j.t.JMeterThread: Thread is done: TG Authorization 1-1
2018-03-28 18:06:45,499 INFO o.a.j.t.JMeterThread: Thread finished: TG Authorization 1-1
2018-03-28 18:06:45,499 INFO o.a.j.e.StandardJMeterEngine: Notifying test listeners of end of test
2018-03-28 18:06:45,500 INFO o.a.j.g.u.JMeterMenuBar: setRunning(false, *local*)

Please let me know where i am incorrect.