Jmeter - How to loop data based on the 'jar' file - loops

Question

I want to create scenario where i want use data from jar file into Jmeter Loop logic.
My jar looks like:
public String Australia()
{
String a = "{"
+ "\"location\": {"
+ "\"lat\": -33.8669710,"
+ "\"lng\": 151.1958750"
+ "},"
+ "\"accuracy\": 50,"
+ "\"name\": \"Google Shoes!\","
+ "\"phone_number\": \"[phone]\","
+ "\"address\": \"48 Pirrama Road, Pyrmont, NSW 2009, Australia\","
+ "\"types\": [\"shoe_store\"],"
+ "\"website\": \"http://www.google.com.au/\","
+ "\"language\": \"en-AU\""
+
"}";
return a;
}
public String canada()
{
String c = "{"
+ "\"location\": {"
+ "\"lat\": -33.8669710,"
+ "\"lng\": 151.1958750"
+ "},"
+ "\"accuracy\": 50,"
+ "\"name\": \"Google Shoes!\","
+ "\"phone_number\": \"[phone]\","
+ "\"address\": \"48 Pirrama Road, Pyrmont, NSW 2009, Canada\","
+ "\"types\": [\"shoe_store\"],"
+ "\"website\": \"http://www.google.com.ca/\","
+ "\"language\": \"en-CA\""
+
"}";
return c;
}
1) with above data i want to 'feed' Jmeter call as described on the bellow picture
2) every time i add new country at the jar file, loop be increased accordingly.
Some thought how this could be done, what should i use as variable and how i can tell the loop to increase?

Answer 1

Add JSR223 PreProcessor as a child of the 002_2_send payment request
Put the following code into "Script" area:
def testData = new com.example.TestData()
def methods = testData.class.getDeclaredMethods()
def payload = org.apache.commons.lang.reflect.MethodUtils.invokeExactMethod(testData, methods[vars.get('__jm__Loop Controller__idx') as int].getName())
sampler.addNonEncodedArgument('',payload,'')
sampler.setPostBodyRaw(true)
Define "Loop Count" in the Loop Controller using __groovy() function like:
${__groovy(com.example.TestData.getDeclaredMethods().size(),)}
Change com.example to your own package name and TestData to your class name
Once you drop the new version of .jar to JMeter Classpath you will need to restart JMeter to pick up the changes
That's it, each iteration of the Loop Controller the JSR223 PreProcessor will execute the next function in your class and update the request body with the returned data:
References:
Java Reflection API
Apache Groovy - Why and How You Should Use It