Conversion between LoadRunner parameters and variables

This is a script based on the script for custom monitoring Tomcat using LoadRunner. this article describes how parameters interact and how parameters and variables are copied and transferred. the following code comments are written according to your own understanding, and the correctness is not guaranteed.

 

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1. Action ()
2. {
3. // Define a three-character array for condition judgment
4. Char JFM [100];
5. Char JTM [100];
6. Char jmm [100];
8. // You must declare the data conversion function in advance. Otherwise, the monitoring result is incorrect.
9. Double atof (const char * string );
11. // The following three web_reg_save_param documents capture monitoring data from Tomcat:
12. Web_reg_save_param ("jvm_free_memory ",
13. "LB = free memory :",
14. "RB = Mb ",
15. "Ord = 1 ",
16. Last );
17. Web_reg_save_param ("jvm_total_memory ",
18. "LB = total memory :",
19. "RB = Mb ",
20. "Ord = 1 ",
21. Last );
22. Web_reg_save_param ("jvm_max_memory ",
23. "LB = max memory :",
24. "RB = Mb ",
25. "Ord = 1 ",
26. Last );
28. // Set monitoring transactions
29. Lr_start_transaction ("status ");
30. // Log on to Tomcat
31. Web_set_user ("admin", "admin", "localhost: 8080 ");
32. // Tomcat monitoring URL
33. Web_url ("status ",
34. "Url = http: // localhost: 8080/manager/status ",
35. "Resource = 0 ",
36. "Reccontenttype = text/html ",
37. "Snapshot = t1.inf ",
38. "Mode = html ",
39. Last );
41. Lr_end_transaction ("status", lr_pass );
42. // User-defined monitoring of atat_jvm usage
43. // Lr_user_data_point ("JVM free memory", atof (lr_eval_string ("{jvm_free_memory }")));
44. // Lr_user_data_point ("JVM total memory", atof (lr_eval_string ("{jvm_total_memory }")));
45. // Lr_user_data_point ("JVM Max memory", atof (lr_eval_string ("{jvm_max_memory }")));
47. Lr_output_message ("**********************************");
49. // Print Monitoring Value
50. Lr_output_message (lr_eval_string ("{jvm_free_memory }"));
51. Lr_output_message (lr_eval_string ("{jvm_total_memory }"));
52. Lr_output_message (lr_eval_string ("{jvm_max_memory }"));
54. Lr_output_message ("**********************************");
56. // Save the parameter value in another parameter (in principle, it is similar to the reference in C ++)
57. Lr_save_string (lr_eval_string ("{jvm_free_memory}"), "jfreemem ");
58. Lr_save_string (lr_eval_string ("{jvm_total_memory}"), "jtotalmem ");
59. Lr_save_string (lr_eval_string ("{jvm_max_memory}"), "jmaxmem ");
61. Lr_output_message ("**********************************");
63. // Print the value in "Reference"
64. Lr_output_message (lr_eval_string ("{jfreemem }"));
65. Lr_output_message (lr_eval_string ("{jtotalmem }"));
66. Lr_output_message (lr_eval_string ("{jmaxmem }"));
68. Lr_output_message ("**********************************");
70. // Assign the parameter value to the variable (String Array)
71. Strcpy (JFM, lr_eval_string ("{jvm_free_memory }"));
72. Strcpy (JTM, lr_eval_string ("{jvm_total_memory }"));
73. Strcpy (jmm, lr_eval_string ("{jvm_max_memory }"));
75. // Perform logical judgment
76. If (strcmp (JFM, "") = 0 & strcmp (JTM, "") = 0 & strcmp (jmm, "") = 0 ){
77. Lr_output_message ("% s", "No parameter ");
78. } Else {
79. Lr_output_message ("% s", "parameter ");
80. }
82. // Output the actual value
83. Lr_output_message ("**********************************");
84. Lr_output_message ("% s", JFM );
85. Lr_output_message ("% s", JTM );
86. Lr_output_message ("% s", jmm );
87. Lr_output_message ("**********************************");
89. // Save the variable value in another parameter (in principle, it is similar to the reference in C ++)
90. Lr_save_string (JFM, "jfreemem ");
91. Lr_save_string (JTM, "jtotalmem ");
92. Lr_save_string (jmm, "jmaxmem ");
93. Lr_output_message ("**********************************");
95. Return 0;
96. }

Conversion between LoadRunner parameters and variables