How will I use Throughput Shaping Timer from Jmeter API using java code? - jmeter

Question

I want to use the Throughput Shaping Timer using JMeter API in my java code.
My purpose is to to use Throughput Shaping Timer via JMeter API in my code programmatically.
I have already referenced the class file called VariableThroughputTimer.java by adding it to the source directory of my project folder.
Here is a part of my code snippet:
// VariableThroughputTimer
VariableThroughputTimer timer = new VariableThroughputTimer();
timer.setEnabled(true);
timer.setName("VariableThroughputTimer");
timer.setProperty("Start RPS", 1);
timer.setProperty("End RPS", 1000);
timer.setProperty("Duration", 60);
timer.setComment("Table below sets request rate shcedule ant preview graph instantly shows effect of changes.");
timer.setProperty(TestElement.TEST_CLASS, kg.apc.jmeter.vizualizers.CorrectedResultCollector.class.getName());
timer.setProperty(TestElement.GUI_CLASS, kg.apc.jmeter.vizualizers.TransactionsPerSecondGui.class.getName());
// Thread Group
ThreadGroup threadGroup = new ThreadGroup();
threadGroup.setName("Thread Group");
threadGroup.setNumThreads(4);
threadGroup.setRampUp(1);
threadGroup.setDuration(1);;
threadGroup.setSamplerController(loopController);
threadGroup.setSamplerController(PublishController);
threadGroup.setProperty(TestElement.TEST_CLASS, ThreadGroup.class.getName());
threadGroup.setProperty(TestElement.GUI_CLASS, ThreadGroupGui.class.getName());
// Test Plan
TestPlan testPlan = new TestPlan("IOT_Jmeter");
testPlan.setProperty(TestElement.TEST_CLASS, TestPlan.class.getName());
testPlan.setProperty(TestElement.GUI_CLASS, TestPlanGui.class.getName());
testPlan.setUserDefinedVariables((Arguments) new ArgumentsPanel().createTestElement());
// HTTP Request Sampler and Header Manager
HashTree httpRequestTree = new HashTree();
httpRequestTree.add(mqttConnectSampler);
httpRequestTree.add(mqttpubSampler);
httpRequestTree.add(csvDataSet);
httpRequestTree.add(timer);
So whenever, I try to execute the code. It doesn't execute.
Here are the logs from my eclipse IDE:
2019-02-12 16:13:28 [main] INFO StandardJMeterEngine:453 - Starting ThreadGroup: 1 : Thread Group
2019-02-12 16:13:28 [main] INFO StandardJMeterEngine:513 - Starting 4 threads for group Thread Group.
2019-02-12 16:13:28 [main] INFO StandardJMeterEngine:523 - Thread will continue on error
2019-02-12 16:13:28 [main] INFO ThreadGroup:222 - Starting thread group... number=1 threads=4 ramp-up=1 perThread=250.0 delayedStart=false
2019-02-12 16:13:28 [main] INFO ThreadGroup:236 - Started thread group number 1
2019-02-12 16:13:28 [main] INFO StandardJMeterEngine:464 - All thread groups have been started
2019-02-12 16:13:28 [Thread Group 1-1] INFO JMeterThread:705 - Thread started: Thread Group 1-1
2019-02-12 16:13:28 [Thread Group 1-1] INFO FileServer:265 - Stored: C:\Users\angshuman.basak\Downloads\apache-jmeter-5.0\csvDataNew.csv
2019-02-12 16:13:28 [Thread Group 1-1] INFO VariableThroughputTimer:304 - No further RPS schedule, asking threads to stop...
2019-02-12 16:13:28 [Thread Group 1-1] INFO VariableThroughputTimer:319 - Stopping gracefuly threads of Thread Group : Thread Group
2019-02-12 16:13:28 [Thread Group 1-1] INFO JMeterThread:797 - Stopping: Thread Group 1-2
2019-02-12 16:13:28 [Thread Group 1-1] INFO JMeterThread:797 - Stopping: Thread Group 1-3
2019-02-12 16:13:28 [Thread Group 1-1] INFO JMeterThread:797 - Stopping: Thread Group 1-4
2019-02-12 16:13:28 [Thread Group 1-1] INFO JMeterThread:797 - Stopping: Thread Group 1-1
2019-02-12 16:13:28 [Thread Group 1-1] WARN VariableThroughputTimer:147 - No free threads available in current Thread Group Thread Group, made 0 samples/s for expected rps 1.0 samples/s, increase your number of threads
2019-02-12 16:13:28 [Thread Group 1-1] INFO JMeterThread:324 - Thread finished: Thread Group 1-1
2019-02-12 16:13:29 [Thread Group 1-2] INFO JMeterThread:705 - Thread started: Thread Group 1-2
2019-02-12 16:13:29 [Thread Group 1-2] INFO JMeterThread:324 - Thread finished: Thread Group 1-2
2019-02-12 16:13:29 [Thread Group 1-3] INFO JMeterThread:705 - Thread started: Thread Group 1-3
2019-02-12 16:13:29 [Thread Group 1-3] INFO JMeterThread:324 - Thread finished: Thread Group 1-3
2019-02-12 16:13:29 [Thread Group 1-4] INFO JMeterThread:705 - Thread started: Thread Group 1-4
2019-02-12 16:13:29 [Thread Group 1-4] INFO JMeterThread:324 - Thread finished: Thread Group 1-4
2019-02-12 16:13:29 [main] INFO StandardJMeterEngine:223 - Notifying test listeners of end of test
2019-02-12 16:13:29 [main] INFO FileServer:485 - Close: C:\Users\angshuman.basak\Downloads\apache-jmeter-5.0\csvDataNew.csv
2019-02-12 16:13:29 [main] INFO Summariser:327 - summary = 0 in 00:00:00 = ******/s Avg: 0 Min: 9223372036854775807 Max: -9223372036854775808 Err: 0 (0.00%)
summary = 0 in 00:00:00 = ******/s Avg: 0 Min: 9223372036854775807 Max: -9223372036854775808 Err: 0 (0.00%)
The above Summariser represent that the test didn't get executed. From the above logs the Variable Throughput Timer fetches the below:
2019-02-12 16:13:28 [Thread Group 1-1] INFO VariableThroughputTimer:304 - No further RPS schedule, asking threads to stop...
2019-02-12 16:13:28 [Thread Group 1-1] INFO VariableThroughputTimer:319 - Stopping gracefully threads of Thread Group: Thread Group
2019-02-12 16:13:28 [Thread Group 1-1] WARN VariableThroughputTimer:147 - No free threads available in current Thread Group Thread Group, made 0 samples/s for expected rps 1.0 samples/s, increase your number of threads
I want to execute the code with Throughput Shaping Timer programmatically. I would like to have the correct code for VariableThroughputTimer if my implementation is incorrect or resolve the execution issue.
Your aid is really appreciated.

Answer 1

How do you plan to reach 1000 requests per second with 4 threads only? It might be possible only if you have 4 milliseconds response time which is highly unlikely.
As per log entry you should
Thread Group Thread Group, made 0 samples/s for expected rps 1.0 samples/s, increase your number of threads`
also make sure to configure underlying Loop Controller to iterate forever.
Going forward consider using Concurrency Thread Group which can be connected with the Throughput Shaping Timer using Schedule Feedback function so JMeter will be able to kick off extra threads if the current amount is not enough to reach/maintain the target throughput. Check out Using JMeter’s Throughput Shaping Timer Plugin article for more details.

Answer 2

Your Thread Group configuration isn't appropriate according to your required Throughput. As your required throughput is 1000 RPS, you need at-least 1000 threads if the response time is 1 second. If the response time is 0.5 seconds then you need 500 threads to achieve 1000 RPS. So, You can't achieve that 1000 RPS by using only 4 threads. Your response time have to be .004 seconds(4 ms) to achieve 1000 RPS using only 4 threads which is an unusual thing.
You have set your test duration only for 1 seconds which is also wrong for this case.