TECH KNOW STUDY

While I was searching for a JMeter problem, I saw a guy asking help for a complicated Workload scenario in a blog.
Scenario:-
The under-test web application has 5 scenarios. The ratio to hit these scenarios are as follows : 10:25:30:5:30 by percentage. The total time of execution is 5 hours. In the first hour the number of users should be 100, next hour it should be 80, then it should be 200, the 4th hour it should be 500 and in the last hour it should be 300.
So I thought to put that workload model over here to the reach of others also.

Solution for ERRORS encountered while executing JMeter scripts from ANT

In previous posts, I mentioned that how to integrate JMeter scripts with ANT. So that we will get a clear HTML report after execution. In this post, I am describing the solutions for the error which I faced while following the process of integration.

1. Failed to process ..\bin\Test.jtl: -

   This error will come if there Test.jtl file having no content. To come out from this error just follow the below process and remember no need to create a empty Test.jtl file.
   when we execute the "ant" command from command prompt by default it will create a jtl file same name as jmx file.

2. Test.jtl does not exist: -

   This error will come when we hit "ant" command from the command prompt to execute the JMeter script.
   
   
   The solution to overcome this error is, Need to uncomment some lines from the build.xml file. As shown in below snapshot
   
   

JMeter Script Execution with ANT from ANT folder structure

Stepping Thread Group

JMeter "JDBC Connection" for Oracle DataBase(PLSQL)

Ultimate Thread Group

1. Add a Ultimate Thread Group
2. Add no. of rows depend on how may Thread/Slots you wants
3. Ex. Fig.1
   I am adding 5 rows with different configuration
   
   
   
   Configuration description:-

•        Start Thread Count- We need to put no. of user we want to execute with that Thread/Slots.All the thread will start one by one like we have 100 users in first thread for execution.
•          Initial Delay-This is the time delay for first user to hit the server after execution started.
•          Start-up time- We can say it used to find the ramp up time for the thread. Start up time will be divided among each user as (Threads Count / Start-up Time). So here it is (100/10). It means 10 sec for each user to hit the server.
•          Hold Load For- Once all the user ramp up related to that particular thread,  load of 100 users will be there for 80sec.
•          Shutdown Time- After 80 seconds users need to stop the hitting server. So here it is 5 seconds. It means within 5 seconds all the user will stop the hitting server.

Difference between Regression and Re-testing

Print JMETER "HTTP Request" Parameters Value into a CSV File

Reading a file through Bean Shell in Jmeter

We can read a file in JMeter using different Classes and These are below.

       1.FileReader class

       2.FileInputStream class

Now if we try to dig little deep about these classes,First we need to know when to use "InputStream" and when to go for "Reader". Main difference between them is, InputStream is used to read binary data, while Reader is used to read text data.

An InputStream is the method of getting information from resource. It observe the data byte by byte without performing any kind of translation. If you are reading image data, or any binary file, this method is used.

A Reader is used for character streams. If the information you are reading is all text, then the Reader will take care of the character decoding for you and give you unicode characters from the raw input stream. If you are reading any type of text, this method is used.

Now other thing is we can read the file in two ways,

            1. char by char.

            2. line by line.

1. File Reader - Read Char by char:
import java.io.FileReader;

FileReader fileReader=new FileReader("Path/Example.txt");
int i =fileReader.read();
while(i!=-1)

{
  System.out.print((char)i);
  i=fileReader.read();
}

2. File Reader - Read line by line:
import java.io.FileReader;
FileReader fileReader=new FileReader("Path/Example.txt");
BufferedReader bufferReader= new BufferedReader(fileReader);
String line=bufferReader.readLine();
while(line!=null)

{
    System.out.println(line);
    line=bufferReader.readLine();
}
   fileReader.close();
   bufferReader.close();

3. File Input Stream- Read Char by char :
import java.io.FileInputStream;System.out.println("Method");

FileInputStream fileInputStream=new FileInputStream("Path/Example.txt");

int i=fileInputStream.read();

while (i!=-1)

{

System.out.print((char)i);

i=fileInputStream.read();

}

fileInputStream.close();

4. File Input Stream -Read line by line:
import java.io.FileInputStream;
FileInputStream fileInputStream= new FileInputStream("Path/Example.txt");
InputStreamReader inputStreamReader=new InputStreamReader(fileInputStream);//An InputStreamReader is a bridge from byte streams to character streams
BufferedReader br = new BufferedReader(inputStreamReader);
String line=br.readLine();
while(line!= null)
{
  System.out.println(line);
      line=br.readLine();
}
  inputStreamReader.close(); 
  fileInputStream.close();

Notes:-
1.path:- It is the location where your resource file is present.