LoadRunner参数和变量之间的转换

这是用LoadRunner自定义监控Tomcat的脚本为基础而写的脚本.阐述了参数相互之间以及参数与变量之间复制传递原理.下面的代码注释是按照自己的理解写的,正确性不一定保证.

Action()
{
	//定义三个字符数组用于条件判断
	char jFM[100];
	char jTM[100];
	char jMM[100];

	//必须要预先声明数据转换函数,否则得到的监控结果不正确.
	double atof(const char *string);

	//以下三个web_reg_save_param负责从Tomcat中抓取监控数据
	web_reg_save_param("JVM_Free_Memory",
				"LB=Free memory:",
				"RB=MB",
				"ORD=1",
				LAST);
	web_reg_save_param("JVM_Total_Memory",
				"LB=Total memory:",
				"RB=MB",
				"ORD=1",
				LAST);
	web_reg_save_param("JVM_Max_Memory",
				"LB=Max memory:",
				"RB=MB",
				"ORD=1",
				LAST);

	//设定监控事务
    	lr_start_transaction("Status");
	//登陆Tomcat
	web_set_user("admin", "admin", "localhost:8080");
	//Tomcat监控URL
	web_url("status",
			"URL=http://localhost:8080/manager/status",
			"Resource=0",
			"RecContentType=text/html",
			"Snapshot=t1.inf",
			"Mode=HTML",
			LAST);

    	lr_end_transaction("Status", LR_PASS);
	//通过用户自定义监控Tomcat_JVM的使用情况
	//lr_user_data_point("JVM Free Memory", atof(lr_eval_string("{JVM_Free_Memory}")));
	//lr_user_data_point("JVM Total Memory", atof(lr_eval_string("{JVM_Total_Memory}")));
	//lr_user_data_point("JVM Max Memory", atof(lr_eval_string("{JVM_Max_Memory}")));

	lr_output_message("**********************************");

	//打印监控值
    	lr_output_message(lr_eval_string("{JVM_Free_Memory}"));
    	lr_output_message(lr_eval_string("{JVM_Total_Memory}"));
    	lr_output_message(lr_eval_string("{JVM_Max_Memory}"));

	lr_output_message("**********************************");

	//将参数的值保存在另外一个参数中(其实从运行原理上说,类似于C++中的引用)
	lr_save_string(lr_eval_string("{JVM_Free_Memory}"), "JFreeMem");
	lr_save_string(lr_eval_string("{JVM_Total_Memory}"), "JTotalMem");
	lr_save_string(lr_eval_string("{JVM_Max_Memory}"), "JMaxMem");

	lr_output_message("**********************************");

	//打印"引用"中的值
	lr_output_message(lr_eval_string("{JFreeMem}"));
	lr_output_message(lr_eval_string("{JTotalMem}"));
	lr_output_message(lr_eval_string("{JMaxMem}"));

	lr_output_message("**********************************");

	//将参数值赋给变量(字符串数组)
	strcpy(jFM, lr_eval_string("{JVM_Free_Memory}"));
	strcpy(jTM, lr_eval_string("{JVM_Total_Memory}"));
	strcpy(jMM, lr_eval_string("{JVM_Max_Memory}"));

	//进行逻辑判断
	if (strcmp(jFM, "") == 0 && strcmp(jTM, "") == 0 && strcmp(jMM, "") == 0) {
		lr_output_message("%s", "无参数");
	} else {
		lr_output_message("%s", "有参数");
	}
	
	//输出实际值
	lr_output_message("**********************************");
	lr_output_message("%s", jFM);
	lr_output_message("%s", jTM);
	lr_output_message("%s", jMM);
	lr_output_message("**********************************");

	//将变量值保存在另外一个参数中(其实从运行原理上说,类似于C++中的引用)
	lr_save_string(jFM, "JFreeMem");
	lr_save_string(jTM, "JTotalMem");
	lr_save_string(jMM, "JMaxMem");
	lr_output_message("**********************************");

	return 0;
}