JMeter BeanShell explanation and thread calling

Jmeter Commonly used BeanShell

Preprocessor ：BeanShell Preprocess

Sampler ：BeanShellSampler
Post Processors ：BeanShell PostProcess
Assertion ：BeanShell Assertion

Jmeter Common built-in variables in

Specific application ：

Post processor applications ： 

　jmeter Kua thread calls

We talked about how to use regular expressions to extract values , Generally, the extracted values are in the same thread , Any request can be referenced , What if other thread groups also want to refer to ？ At this point, it involves the knowledge of a global variable , Don't talk much , Direct examples start .

1、BeanShell Create global variables （ Cross thread group ）： It can be used Beanshell Sampler or Beanshell Post Processors

1） Create a local variable （ Within the thread group ）：token

2） Use Beanshell Call the created local variable token, And name the global variable newtoken, Example ${__setProperty(newtoken,${token},)}

3） Calling global variables across thread groups

Method 1：${__P(newtoken)}; // Call global variables

Method 2：${__property(newtoken)}; // You can also call global variables in this way , It is equivalent to the above writing

Method 3：Beanshell Preprocessor - take newtoken Take it and assign it to token1, Then you can ${token1} quote

String a1=props.get("newtoken");

vars.put("token1",a1)

Quart thread actual combat demonstration

1、 stay 【 Sign in 】 Thread group's [ Unified login ] Under request , Right click > add to > Post Processors > Regular expressions , Log in the response result after the unified login is successful token Use regular expressions to extract , The reference name is “token”.

  add to beanshell Post Processors ：

${__setProperty(new_token,${token},)}; # Put the local variable token  Assign to global variable new_token
String a=vars.get("token");        #  Get local variables to variables a
log.info("<<<<<<<<<<<<<<<<<<<<<<<<<<<<<");# Print log   It's easy to troubleshoot 
log.info("a="+a);# Print variables a  It is convenient to check whether the value of local variables is wrong 

  Create a new query thread ：

add to http request ：

add to beanshell Preprocessor ：

String a1 = props.get("new_token"); # Read global variables new_token  And assign it to a1
vars.put("token2",a1); # hold a1  Assign a value to  token2
log.info(">>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>");
log.info("token2="+token2);# Print token2

  stay http In the request header token2 Variable ：

  If it runs directly , Log discovery , Run the query thread first , After running the login thread , So I can't get token, Query thread failed .

terms of settlement ：

1） In the test plan Choose to run each thread group independently

 

2） Add a fixed timer to the query thread