Issue while sending a JSON object with BeanShell PreProcessor

Question

I want to send one JSON Object to the HTTP Request body in JMeter using the BeanShell PreProcessor. To model the JSON object I am using java code (with some business logic). Hence I created one BeanShell PreProcessor and wrote the java code as follows,

import org.json.JSONArray;
import org.json.JSONException;
import org.json.JSONObject;

    String key="testKey";
    int lastID=5548;
    int totalCount=198;
    JSONObject obj1 = new JSONObject();
    JSONArray obj2 = new JSONArray();
    for (int i=1;i<=totalCount;i++)
    {
        JSONObject item = new JSONObject();
        item.put("taskId", Integer.toString(lastID+i));
        item.put("taskOrder",1);
        item.put("snapshotTemplateKey",key);
        obj2.put(item);
        obj1.put("changeControlTasks", obj2);
        obj1.put("ccName","Eleven" );
        obj1.put("snapshotTemplateKey",key);
    }
    log.info(obj1);
    vars.putObject("jsonData",obj1);

And in the HTTP request body, I am trying to fetch the data as follows,

${jsonData}

With the above code, It is throwing the below shared error

Request :

POST data:
${jsonData}

Error in the logs:

2017/08/06 07:27:10 ERROR - jmeter.util.BeanShellInterpreter: Error invoking bsh method: eval
Sourced file: inline evaluation of: ``import org.json.JSONArray; import org.json.JSONException; 
import org.json.JSONOb . . . '' : Error in method invocation: Method info(  ) not found in class'org.apache.log.Logger'

Can any one suggest what is issue with above code and how to resolve the same.

any suggestions or solutions will also be appreciated.

Ori Marko · Accepted Answer · 2017-08-06T03:57:26.627

1

obj2 hold the data. Use obj2 instead of obj1:

 vars.putObject("jsonData",obj2);

For log convert toSring

 log.info(obj1.toString());

edited Aug 06 '17 at 03:57

answered Aug 05 '17 at 19:10

Ori Marko

56,308
23
131
233

Tried your suggestion, still facing the same issue – Prasad Aug 06 '17 at 02:00
Add to answer log issue – Ori Marko Aug 06 '17 at 04:01

score 0 · Answer 2 · answered Aug 07 '17 at 04:03

Your Beanshell won't work as it will fail at this line:
```
log.info(obj1); 
```
as you won't be able to print a JSON Object into the log
Even if you work it around your HTTP Request sampler won't work for the same reason: you cannot put a JSON Object as a body data as JMeter expects a String there

Beanshell is not the best scripting option, when you run your test with high number of threads this function will become the bottleneck, you should consider switching to JSR223 PreProcessor and Groovy language instead. Groovy has built-in JSON support and its performance is much better as well-behaved Groovy scripts can be compiled and cached. The substitution Groovy code would be something like:

import groovy.json.JsonBuilder

def key = 'testKey'
def lastID = 5548
def totalCount = 198

JsonBuilder builder = new JsonBuilder()

def array = []
1.upto(totalCount, {
    def taskId = (lastID + "${it}".toInteger())
    array << [getKey: { key }, getTaskId: { taskId }, getTaskOrder: { 1 }]

})

builder(
        {
            changeControlTasks array.collect() {
                [
                        "snapshotTemplateKey": it.getKey(),
                        "taskId"             : it.getTaskId(),
                        "taskOrder"          : it.getTaskOrder()
                ]
            }
            snapshotTemplateKey "testKey"
            ccName "Eleven"
        }
)

vars.put('jsonData', builder.toPrettyString())

Issue while sending a JSON object with BeanShell PreProcessor

2 Answers2