{"id":52669,"date":"2025-09-11T13:00:55","date_gmt":"2025-09-11T13:00:55","guid":{"rendered":"https:\/\/www.devopsschool.com\/blog\/?p=52669"},"modified":"2025-09-11T13:01:50","modified_gmt":"2025-09-11T13:01:50","slug":"appdynamics-lab-create-a-sample-load-for-apm-in-petclinic-app","status":"publish","type":"post","link":"https:\/\/www.devopsschool.com\/blog\/appdynamics-lab-create-a-sample-load-for-apm-in-petclinic-app\/","title":{"rendered":"Appdynamics: Lab – Create a Sample Load for APM in petclinic App using Jmeter"},"content":{"rendered":"\n

Here\u2019s the exact JMeter setup<\/strong> to create Owners at
http:\/\/43.204.220.89:8080\/petclinic\/owners\/new<\/code>.<\/p>\n\n\n\n

Thread Group (your load)<\/h1>\n\n\n\n
    \n
  • Users: as needed (e.g., 50\/200\/1000)<\/li>\n\n\n\n
  • Ramp-up: e.g., 60s<\/li>\n\n\n\n
  • Loop: as needed<\/li>\n<\/ul>\n\n\n\n

    Config Elements<\/h1>\n\n\n\n
      \n
    1. HTTP Request Defaults<\/strong><\/li>\n<\/ol>\n\n\n\n
        \n
      • Server Name: 43.204.220.89<\/code><\/li>\n\n\n\n
      • Port: 8080<\/code><\/li>\n\n\n\n
      • Protocol: http<\/code><\/li>\n<\/ul>\n\n\n\n
          \n
        1. HTTP Cookie Manager<\/strong> (enable cookies for session)<\/li>\n\n\n\n
        2. HTTP Header Manager<\/strong><\/li>\n<\/ol>\n\n\n\n
            \n
          • Content-Type: application\/x-www-form-urlencoded<\/code><\/li>\n<\/ul>\n\n\n\n
              \n
            1. CSV Data Set Config<\/strong> (to feed random data at scale)<\/li>\n<\/ol>\n\n\n\n
                \n
              • Filename: owners.csv<\/code><\/li>\n\n\n\n
              • Variable Names: first,last,address,city,phone<\/code><\/li>\n\n\n\n
              • Recycle on EOF: True<\/code><\/li>\n\n\n\n
              • Stop thread on EOF: False<\/code><\/li>\n\n\n\n
              • Example owners.csv<\/code> line:
                John,Doe,12 Baker Street,London,0700012345<\/code><\/li>\n<\/ul>\n\n\n\n

                Samplers & Post-Processors<\/h1>\n\n\n\n

                1) GET form page (fetch cookies and optional CSRF)<\/h2>\n\n\n\n

                Sampler:<\/strong> HTTP Request<\/p>\n\n\n\n

                  \n
                • Method: GET<\/code><\/li>\n\n\n\n
                • Path: \/petclinic\/owners\/new<\/code><\/li>\n<\/ul>\n\n\n\n

                  Post-Processor (optional, if CSRF is enabled):<\/strong> CSS Selector Extractor<\/em><\/p>\n\n\n\n

                    \n
                  • Name of created variable: csrf<\/code><\/li>\n\n\n\n
                  • CSS Selector: input[name=_csrf]<\/code><\/li>\n\n\n\n
                  • Attribute: value<\/code>
                    (If you don\u2019t see a hidden _csrf<\/code> field in the HTML, skip this extractor and the _csrf<\/code> param below.)<\/em><\/li>\n<\/ul>\n\n\n\n

                    2) POST create owner<\/h2>\n\n\n\n

                    Sampler:<\/strong> HTTP Request<\/p>\n\n\n\n

                      \n
                    • Method: POST<\/code><\/li>\n\n\n\n
                    • Path: \/petclinic\/owners\/new<\/code><\/li>\n\n\n\n
                    • Parameters (add as form params):\n
                        \n
                      • firstName<\/code> = ${first}<\/code><\/li>\n\n\n\n
                      • lastName<\/code> = ${last}<\/code><\/li>\n\n\n\n
                      • address<\/code> = ${address}<\/code><\/li>\n\n\n\n
                      • city<\/code> = ${city}<\/code><\/li>\n\n\n\n
                      • telephone<\/code> = ${phone}<\/code><\/li>\n\n\n\n
                      • _csrf<\/code> = ${csrf}<\/code> (only if extractor above succeeded)<\/em><\/li>\n<\/ul>\n<\/li>\n<\/ul>\n\n\n\n

                        (Alternative body if you prefer raw):<\/strong>
                        firstName=${first}&lastName=${last}&address=${address}&city=${city}&telephone=${phone}&_csrf=${csrf}<\/code><\/p>\n\n\n\n

                        Assertion (to confirm success):<\/strong> Response Assertion<\/em><\/p>\n\n\n\n

                          \n
                        • Contains: Owner Information<\/code>
                          (Petclinic typically redirects to \/petclinic\/owners\/{id}<\/code> showing that text on success.)<\/em><\/li>\n<\/ul>\n\n\n\n

                          Tips for mass traffic<\/h1>\n\n\n\n
                            \n
                          • Add a Uniform Random Timer<\/strong> (e.g., 300\u20131200 ms) to better mimic users.<\/li>\n\n\n\n
                          • Scale Thread Group<\/code> users + loop to hit your target RPS.<\/li>\n\n\n\n
                          • If you see 302 redirects, enable \u201cFollow Redirects\u201d on the POST sampler.<\/li>\n<\/ul>\n\n\n\n

                            That\u2019s it\u2014this pair of samplers (GET\u2192POST) with CSV data will flood the endpoint with realistic owner-creation requests.<\/p>\n\n\n\n

                            Sample JMeter File and Sample Data<\/h2>\n\n\n\n