Token Management in JMeter for Repeated Requests

Apache JMeter is a powerful Java application used for testing the performance and functional behavior of various applications and protocols. One common scenario in testing is the need to generate a token once and then reuse it for multiple requests. Here’s how you can efficiently manage tokens in JMeter:

Step 1: Generate and Extract Token

First, generate the token in one Thread Group and store it using a Json Extractor. Ensure to configure the request with necessary parameters such as host, path, grant-type, client-id, and client-secret. Then, define the JSON Path expressions to extract the token and store it in a variable, such as `access_token`.

Step 2: Store Token

Using a BeanShell Assertion, store the token using the `setProperty()` function. This function facilitates interThreadCommunication, ensuring the token is accessible across different threads. The syntax would be: `${__setProperty(access_token_new, ${access_token})}`.

Step 3: Reuse Token

In subsequent threads, configure requests to utilize the token. This is achieved by using the `property()` function: `${__property(access_token_new)}`.

Important Note:

- Ensure that the number of users/threads for token generation is set to 1, while for other requests, it can be 1 or more.

- Running the test plan will generate the token once, which can then be reused multiple times for other requests.