loadrunner12.55：常用函数汇总说明之Transaction Functions参数函数

根据使用手册内容可见，LR支持的关于Transaction Functions包括：

lr_end_cross_vuser_transaction	Marks the completion in this Vuser of a transaction started by a different Vuser.
lr_end_sub_transaction	Marks the end of a sub-transaction.
lr_end_transaction	Marks the end of a transaction.
lr_end_transaction_instance	Marks the end of a transaction instance.
lr_fail_trans_with_error	Sets the status of open transactions to LR_FAIL and sends an error message.
lr_get_trans_instance_duration	Returns the duration of a transaction instance specified by its handle.
lr_get_trans_instance_status	Returns the current status of a transaction instance.
lr_get_trans_instance_think_time	Gets the think time of a transaction instance specified by its handle.
lr_get_trans_instance_wasted_time	Gets the wasted time of a transaction instance by its handle.
lr_get_transaction_duration	Gets the duration of a transaction by its name.
lr_get_transaction_status	Gets the current status of a transaction.
lr_get_transaction_think_time	Gets the think time of a transaction by its name.
lr_get_transaction_wasted_time	Gets the wasted time of a transaction by its name.
lr_resume_transaction	Resumes collecting transaction data.
lr_resume_transaction_instance	Resumes collecting transaction instance data.
lr_set_transaction	Create a transaction manually.
lr_set_transaction_instance_status	Sets the status of a transaction instance.
lr_set_transaction_status	Sets the status of open transactions.
lr_set_transaction_status_by_name	Sets the status of a transaction.
lr_start_cross_vuser_transaction	Initiates a transaction that is closed in one or more Vusers other than the initiating Vuser.
lr_start_sub_transaction	Marks the beginning of a sub-transaction.
lr_start_transaction	Marks the beginning of a transaction.
lr_start_transaction_instance	Starts a nested transaction specified by its parent's handle.
lr_stop_transaction	Stops the collection of transaction data.
lr_stop_transaction_instance	Stops collecting data for a transaction specified by its handle.
lr_wasted_time	Sets the wasted time for all open transactions.

1、lr_start_transaction  &  lr_end_transaction

 设定订票系统的登录事务login：

lr_start_end_transaction_Func()
{

/*Correlation comment - Do not change!  Original value='131159.414823815zHtzfVcpttAtHQpAHtt' Name ='userSession' Type ='ResponseBased'*/
	web_reg_save_param_ex(
		"ParamName=userSession",
		"LB=name="userSession" value="",
		"RB="/>
<table border",
		SEARCH_FILTERS,
		"Scope=Body",
		"IgnoreRedirections=No",
		"RequestUrl=*/nav.pl*",
		LAST);

	web_url("WebTours", 
		"URL=http://127.0.0.1:1080/WebTours/", 
		"Resource=0", 
		"RecContentType=text/html", 
		"Referer=", 
		"Snapshot=t8.inf", 
		"Mode=HTML", 
		LAST);

	lr_start_transaction("login");


	web_submit_data("login.pl",
		"Action=http://127.0.0.1:1080/cgi-bin/login.pl",
		"Method=POST",
		"RecContentType=text/html",
		"Referer=http://127.0.0.1:1080/cgi-bin/nav.pl?in=home",
		"Snapshot=t9.inf",
		"Mode=HTML",
		ITEMDATA,
		"Name=userSession", "Value={userSession}", ENDITEM,
		"Name=username", "Value=jojo", ENDITEM,
		"Name=password", "Value=bean", ENDITEM,
		"Name=JSFormSubmit", "Value=on", ENDITEM,
		"Name=login.x", "Value=0", ENDITEM,
		"Name=login.y", "Value=0", ENDITEM,
		LAST);
	
	lr_end_transaction("login", LR_AUTO);

	web_image("Search Flights Button", 
		"Alt=Search Flights Button", 
		"Snapshot=t10.inf", 
		LAST);

	web_submit_form("reservations.pl", 
		"Snapshot=t11.inf", 
		ITEMDATA, 
		"Name=depart", "Value=Denver", ENDITEM, 
		"Name=departDate", "Value=04/24/2021", ENDITEM, 
		"Name=arrive", "Value=London", ENDITEM, 
		"Name=returnDate", "Value=04/25/2021", ENDITEM, 
		"Name=numPassengers", "Value=1", ENDITEM, 
		"Name=roundtrip", "Value=<OFF>", ENDITEM, 
		"Name=seatPref", "Value=None", ENDITEM, 
		"Name=seatType", "Value=Coach", ENDITEM, 
		"Name=findFlights.x", "Value=52", ENDITEM, 
		"Name=findFlights.y", "Value=6", ENDITEM, 
		LAST);

	web_submit_form("reservations.pl_2", 
		"Snapshot=t12.inf", 
		ITEMDATA, 
		"Name=outboundFlight", "Value=020;338;04/24/2021", ENDITEM, 
		"Name=reserveFlights.x", "Value=36", ENDITEM, 
		"Name=reserveFlights.y", "Value=5", ENDITEM, 
		LAST);

	web_submit_form("reservations.pl_3", 
		"Snapshot=t13.inf", 
		ITEMDATA, 
		"Name=firstName", "Value=Jojo", ENDITEM, 
		"Name=lastName", "Value=Bean", ENDITEM, 
		"Name=address1", "Value=", ENDITEM, 
		"Name=address2", "Value=", ENDITEM, 
		"Name=pass1", "Value=Jojo Bean", ENDITEM, 
		"Name=creditCard", "Value=", ENDITEM, 
		"Name=expDate", "Value=", ENDITEM, 
		"Name=saveCC", "Value=<OFF>", ENDITEM, 
		"Name=buyFlights.x", "Value=47", ENDITEM, 
		"Name=buyFlights.y", "Value=9", ENDITEM, 
		LAST);


	web_image("SignOff Button", 
		"Alt=SignOff Button", 
		"Ordinal=1", 
		"Snapshot=t14.inf", 
		LAST);

	return 0;
}

 显示事务完成响应时间时0.1504秒，执行函数web_submit_data本身消耗的时间是0.0083秒。

 2、lr_start_sub_transaction  &  lr_end_sub_transaction

lr_start_end_sub_transaction()
{
	int i, baseIter = 10;
    char dude[1000];
//Start Parent
    lr_start_transaction("Master");
//Start first sub transaction
    lr_start_sub_transaction("FirstT", "Master");
//Start nested child of first sub transaction
    lr_start_sub_transaction("FirstT_Child1", "FirstT");
 // Artificially create some elapsed time
        for (i=0; i<(20 * baseIter); ++i)
            sprintf(dude, 
                "This is the way we kill time in a script = %d", i);
            
    lr_end_sub_transaction("FirstT_Child1",LR_AUTO);
// Start second nested child
    lr_start_sub_transaction("FirstT_Child2", "FirstT");  
// Artificially create some elapsed time
        for (i=0; i<(20 * baseIter); ++i)
            sprintf(dude, 
                "This is the way we kill time in a script = %d", i);
	lr_end_sub_transaction("FirstT_Child2",LR_AUTO);
    lr_end_sub_transaction("FirstT",LR_AUTO);
    //Start a second sub transaction
    lr_start_sub_transaction("SecondT", "Master");    
        for (i=0; i< (20 * baseIter); ++i)
            sprintf(dude, 
                "This is the way we kill time in a script = %d", i);            
    lr_end_sub_transaction("SecondT",LR_AUTO);
    lr_end_transaction("Master", LR_AUTO);


	return 0;
}

　　

 3、lr_stop_transaction  &  lr_resume_transaction

 此处不再进行具体举例说明，推荐使用lr_start_sub_transaction和lr_set_transaction。

4、lr_set_transaction

lr_set_transaction_Func()
{
	lr_set_transaction("Multiple_Orders", 45.3, LR_PASS);
	return 0;
}

　　

 5、lr_set_transaction_status

lr_set_transaction_status_Func()
{
	int i, baseIter = 10;
    char dude[1000];
//Start Parent
    lr_start_transaction("Master");
    
 // Artificially create some elapsed time
    for (i=0; i<(20 * baseIter); ++i)
        sprintf(dude, 
            "This is the way we kill time in a script = %d", i);
    
    //Start a second sub transaction
    lr_start_sub_transaction("FirstT", "Master");    
	    for (i=0; i< (20 * baseIter); ++i)
	        sprintf(dude, 
	            "This is the way we kill time in a script = %d", i);
	    
			if (i>1)//超过1秒则修改事务状态为失败
			    lr_set_transaction_status(LR_FAIL);	

	
	lr_end_sub_transaction("FirstT",LR_AUTO);

    
    lr_end_transaction("Master", LR_PASS);
        
	return 0;
}

　　

 可以看到，事务FirstT的状态被修改为Fail，而Master事务的状态不受影响。

6、lr_set_transaction_status_by_name

lr_set_transaction_status_by_name_Func()
{
	int i, baseIter = 10;
    char dude[1000];
//Start Parent
    lr_start_transaction("Master");
    
 // Artificially create some elapsed time
    for (i=0; i<(20 * baseIter); ++i)
        sprintf(dude, 
            "This is the way we kill time in a script = %d", i);
    
    //Start a second sub transaction
    lr_start_sub_transaction("FirstT", "Master");    
	    for (i=0; i< (20 * baseIter); ++i)
	        sprintf(dude, 
	            "This is the way we kill time in a script = %d", i);
	    
			if (i>1)//超过1秒则修改事务状态为失败
			    lr_set_transaction_status_by_name(LR_FAIL,"FirstT");	

	
	lr_end_sub_transaction("FirstT",LR_AUTO);

    
    lr_end_transaction("Master", LR_AUTO);
	return 0;
}

 可以看到根据子事务FirstT的名称将其LR_AUTO状态成功修改为LR_FAIL，但是父事务Master不受影响。

7、lr_get_transaction_duration

lr_get_transaction_duration_Func()
{
	double trans_time;
	int status;
/*Correlation comment - Do not change!  Original value='131159.414823815zHtzfVcpttAtHQpAHtt' Name ='userSession' Type ='ResponseBased'*/
	web_reg_save_param_ex(
		"ParamName=userSession",
		"LB=name="userSession" value="",
		"RB="/>
<table border",
		SEARCH_FILTERS,
		"Scope=Body",
		"IgnoreRedirections=No",
		"RequestUrl=*/nav.pl*",
		LAST);
	
	
	web_url("WebTours", 
		"URL=http://127.0.0.1:1080/WebTours/", 
		"Resource=0", 
		"RecContentType=text/html", 
		"Referer=", 
		"Snapshot=t8.inf", 
		"Mode=HTML", 
		LAST);
		
	lr_start_transaction("login");
	
	web_submit_data("login.pl",
		"Action=http://127.0.0.1:1080/cgi-bin/login.pl",
		"Method=POST",
		"RecContentType=text/html",
		"Referer=http://127.0.0.1:1080/cgi-bin/nav.pl?in=home",
		"Snapshot=t9.inf",
		"Mode=HTML",
		ITEMDATA,
		"Name=userSession", "Value={userSession}", ENDITEM,
		"Name=username", "Value=jojo", ENDITEM,
		"Name=password", "Value=bean", ENDITEM,
		"Name=JSFormSubmit", "Value=on", ENDITEM,
		"Name=login.x", "Value=0", ENDITEM,
		"Name=login.y", "Value=0", ENDITEM,
		LAST);
	
	lr_end_transaction("login", LR_AUTO);

	web_image("Search Flights Button", 
		"Alt=Search Flights Button", 
		"Snapshot=t10.inf", 
		LAST);

	lr_start_transaction("Flight");
	
	//步骤1：选择航班出发地和目的地及座位属性
	web_submit_form("reservations.pl", 
		"Snapshot=t11.inf", 
		ITEMDATA, 
		"Name=depart", "Value=Denver", ENDITEM, 
		"Name=departDate", "Value=04/24/2021", ENDITEM, 
		"Name=arrive", "Value=London", ENDITEM, 
		"Name=returnDate", "Value=04/25/2021", ENDITEM, 
		"Name=numPassengers", "Value=1", ENDITEM, 
		"Name=roundtrip", "Value=<OFF>", ENDITEM, 
		"Name=seatPref", "Value=None", ENDITEM, 
		"Name=seatType", "Value=Coach", ENDITEM, 
		"Name=findFlights.x", "Value=52", ENDITEM, 
		"Name=findFlights.y", "Value=6", ENDITEM, 
		LAST);

	//步骤2：选择乘坐航班
	web_submit_form("reservations.pl_2", 
		"Snapshot=t12.inf", 
		ITEMDATA, 
		"Name=outboundFlight", "Value=020;338;04/24/2021", ENDITEM, 
		"Name=reserveFlights.x", "Value=36", ENDITEM, 
		"Name=reserveFlights.y", "Value=5", ENDITEM, 
		LAST);
	

	
	//步骤3：完成支付
	status=web_submit_form("reservations.pl_3", 
		"Snapshot=t13.inf", 
		ITEMDATA, 
		"Name=firstName", "Value=Jojo", ENDITEM, 
		"Name=lastName", "Value=Bean", ENDITEM, 
		"Name=address1", "Value=", ENDITEM, 
		"Name=address2", "Value=", ENDITEM, 
		"Name=pass1", "Value=Jojo Bean", ENDITEM, 
		"Name=creditCard", "Value=", ENDITEM, 
		"Name=expDate", "Value=", ENDITEM, 
		"Name=saveCC", "Value=<OFF>", ENDITEM, 
		"Name=buyFlights.x", "Value=47", ENDITEM, 
		"Name=buyFlights.y", "Value=9", ENDITEM, 
		LAST);
		
	// Get transaction time to this point,即获取支付的时间
	trans_time=lr_get_transaction_duration("Flight");
	
	 /* End transaction with operation result - pass or fail */
	if (status == 0)
	     lr_end_transaction("Flight", LR_PASS);
	else
	     lr_end_transaction("Flight", LR_FAIL);

	
	if (trans_time)
	     lr_output_message("The duration up to the submit is %f seconds", trans_time);
	else
	     lr_output_message("The duration cannot be determined.");

	web_image("SignOff Button", 
		"Alt=SignOff Button", 
		"Ordinal=1", 
		"Snapshot=t14.inf", 
		LAST);

	return 0;
}

　

 可以看到，lr_get_transaction_duration函数获取的响应时间0.286135秒与事务结束时统计的响应时间为0.2901秒非常接近，这是因为我将lr_get_transaction_duration插在了事务结束的前面。

8、lr_get_transaction_think_time

lr_get_transaction_think_time_Func()
{
	double think_time;
	int status;

/*Correlation comment - Do not change!  Original value='131159.414823815zHtzfVcpttAtHQpAHtt' Name ='userSession' Type ='ResponseBased'*/
	web_reg_save_param_ex(
		"ParamName=userSession",
		"LB=name="userSession" value="",
		"RB="/>
<table border",
		SEARCH_FILTERS,
		"Scope=Body",
		"IgnoreRedirections=No",
		"RequestUrl=*/nav.pl*",
		LAST);

	web_url("WebTours", 
		"URL=http://127.0.0.1:1080/WebTours/", 
		"Resource=0", 
		"RecContentType=text/html", 
		"Referer=", 
		"Snapshot=t8.inf", 
		"Mode=HTML", 
		LAST);
		
	lr_think_time(1);

	//登录
	web_submit_data("login.pl",
		"Action=http://127.0.0.1:1080/cgi-bin/login.pl",
		"Method=POST",
		"RecContentType=text/html",
		"Referer=http://127.0.0.1:1080/cgi-bin/nav.pl?in=home",
		"Snapshot=t9.inf",
		"Mode=HTML",
		ITEMDATA,
		"Name=userSession", "Value={userSession}", ENDITEM,
		"Name=username", "Value=jojo", ENDITEM,
		"Name=password", "Value=bean", ENDITEM,
		"Name=JSFormSubmit", "Value=on", ENDITEM,
		"Name=login.x", "Value=0", ENDITEM,
		"Name=login.y", "Value=0", ENDITEM,
		LAST);
	

	web_image("Search Flights Button", 
		"Alt=Search Flights Button", 
		"Snapshot=t10.inf", 
		LAST);
	
	lr_start_transaction("Flight");
	
	lr_think_time(1);
	
	//步骤1：选择航班出发地和目的地及座位属性
	web_submit_form("reservations.pl", 
		"Snapshot=t11.inf", 
		ITEMDATA, 
		"Name=depart", "Value=Denver", ENDITEM, 
		"Name=departDate", "Value=04/24/2021", ENDITEM, 
		"Name=arrive", "Value=London", ENDITEM, 
		"Name=returnDate", "Value=04/25/2021", ENDITEM, 
		"Name=numPassengers", "Value=1", ENDITEM, 
		"Name=roundtrip", "Value=<OFF>", ENDITEM, 
		"Name=seatPref", "Value=None", ENDITEM, 
		"Name=seatType", "Value=Coach", ENDITEM, 
		"Name=findFlights.x", "Value=52", ENDITEM, 
		"Name=findFlights.y", "Value=6", ENDITEM, 
		LAST);
	
	lr_think_time(2);
	
	//步骤2：选择乘坐航班
	web_submit_form("reservations.pl_2", 
		"Snapshot=t12.inf", 
		ITEMDATA, 
		"Name=outboundFlight", "Value=020;338;04/24/2021", ENDITEM, 
		"Name=reserveFlights.x", "Value=36", ENDITEM, 
		"Name=reserveFlights.y", "Value=5", ENDITEM, 
		LAST);
	think_time=lr_get_transaction_think_time("Flight");//请确保在RunTime Settings中勾选Replay think time as recorded,否则将显示The think time cannot be determined.
	
	//步骤3：完成支付
	status=web_submit_form("reservations.pl_3", 
		"Snapshot=t13.inf", 
		ITEMDATA, 
		"Name=firstName", "Value=Jojo", ENDITEM, 
		"Name=lastName", "Value=Bean", ENDITEM, 
		"Name=address1", "Value=", ENDITEM, 
		"Name=address2", "Value=", ENDITEM, 
		"Name=pass1", "Value=Jojo Bean", ENDITEM, 
		"Name=creditCard", "Value=", ENDITEM, 
		"Name=expDate", "Value=", ENDITEM, 
		"Name=saveCC", "Value=<OFF>", ENDITEM, 
		"Name=buyFlights.x", "Value=47", ENDITEM, 
		"Name=buyFlights.y", "Value=9", ENDITEM, 
		LAST);
	
	 /* End transaction with operation result - pass or fail */
	if (status == 0)
	    lr_end_transaction("Flight", LR_PASS);
	else
	    lr_end_transaction("Flight", LR_FAIL);
	if (think_time)
	    lr_output_message("The transaction think time is %f seconds", think_time);
	else
	    lr_output_message("The think time cannot be determined.");


	web_image("SignOff Button", 
		"Alt=SignOff Button", 
		"Ordinal=1", 
		"Snapshot=t14.inf", 
		LAST);

	return 0;
}

 可以看到，函数获取的思考时间3.000505秒与事务统计的思考时间3.0005秒基本一致。

9、lr_get_transaction_wasted_time

lr_get_transaction_wasted_time_Func()
{
	double wasteTime,trans_time;
	int status;
/*Correlation comment - Do not change!  Original value='131159.414823815zHtzfVcpttAtHQpAHtt' Name ='userSession' Type ='ResponseBased'*/
	web_reg_save_param_ex(
		"ParamName=userSession",
		"LB=name="userSession" value="",
		"RB="/>
<table border",
		SEARCH_FILTERS,
		"Scope=Body",
		"IgnoreRedirections=No",
		"RequestUrl=*/nav.pl*",
		LAST);

	web_url("WebTours", 
		"URL=http://127.0.0.1:1080/WebTours/", 
		"Resource=0", 
		"RecContentType=text/html", 
		"Referer=", 
		"Snapshot=t8.inf", 
		"Mode=HTML", 
		LAST);
		

	//登录
	web_submit_data("login.pl",
		"Action=http://127.0.0.1:1080/cgi-bin/login.pl",
		"Method=POST",
		"RecContentType=text/html",
		"Referer=http://127.0.0.1:1080/cgi-bin/nav.pl?in=home",
		"Snapshot=t9.inf",
		"Mode=HTML",
		ITEMDATA,
		"Name=userSession", "Value={userSession}", ENDITEM,
		"Name=username", "Value=jojo", ENDITEM,
		"Name=password", "Value=bean", ENDITEM,
		"Name=JSFormSubmit", "Value=on", ENDITEM,
		"Name=login.x", "Value=0", ENDITEM,
		"Name=login.y", "Value=0", ENDITEM,
		LAST);
	

	web_image("Search Flights Button", 
		"Alt=Search Flights Button", 
		"Snapshot=t10.inf", 
		LAST);
	
	lr_start_transaction("Flight");
	
	
	//步骤1：选择航班出发地和目的地及座位属性
	web_submit_form("reservations.pl", 
		"Snapshot=t11.inf", 
		ITEMDATA, 
		"Name=depart", "Value=Denver", ENDITEM, 
		"Name=departDate", "Value=04/24/2021", ENDITEM, 
		"Name=arrive", "Value=London", ENDITEM, 
		"Name=returnDate", "Value=04/25/2021", ENDITEM, 
		"Name=numPassengers", "Value=1", ENDITEM, 
		"Name=roundtrip", "Value=<OFF>", ENDITEM, 
		"Name=seatPref", "Value=None", ENDITEM, 
		"Name=seatType", "Value=Coach", ENDITEM, 
		"Name=findFlights.x", "Value=52", ENDITEM, 
		"Name=findFlights.y", "Value=6", ENDITEM, 
		LAST);
	
	
	//步骤2：选择乘坐航班
	web_submit_form("reservations.pl_2", 
		"Snapshot=t12.inf", 
		ITEMDATA, 
		"Name=outboundFlight", "Value=020;338;04/24/2021", ENDITEM, 
		"Name=reserveFlights.x", "Value=36", ENDITEM, 
		"Name=reserveFlights.y", "Value=5", ENDITEM, 
		LAST);

	//步骤3：完成支付
	status=web_submit_form("reservations.pl_3", 
		"Snapshot=t13.inf", 
		ITEMDATA, 
		"Name=firstName", "Value=Jojo", ENDITEM, 
		"Name=lastName", "Value=Bean", ENDITEM, 
		"Name=address1", "Value=", ENDITEM, 
		"Name=address2", "Value=", ENDITEM, 
		"Name=pass1", "Value=Jojo Bean", ENDITEM, 
		"Name=creditCard", "Value=", ENDITEM, 
		"Name=expDate", "Value=", ENDITEM, 
		"Name=saveCC", "Value=<OFF>", ENDITEM, 
		"Name=buyFlights.x", "Value=47", ENDITEM, 
		"Name=buyFlights.y", "Value=9", ENDITEM, 
		LAST);
	
	// Get transaction wasted time to this point获取截止到此刻的事务浪费时间
	wasteTime=lr_get_transaction_wasted_time("Flight");
	
	 /* End transaction with operation result - pass or fail */
	if (status == 0)
	    lr_end_transaction("Flight", LR_PASS);
	else
	    lr_end_transaction("Flight", LR_FAIL);
	if (wasteTime)
	    lr_output_message("The transaction wasted time is %f seconds", wasteTime);
	else
	    lr_output_message("The wasted time cannot be determined.");


	web_image("SignOff Button", 
		"Alt=SignOff Button", 
		"Ordinal=1", 
		"Snapshot=t14.inf", 
		LAST);

    
	return 0;
}

可以看出，函数获取的浪费时间0.011592基本与事务统计的浪费时间0.0116基本一致，这是因为我将函数放在了事务结束前面。

10.lr_get_transaction_status

lr_get_transaction_status_Func()
{

	int status;

/*Correlation comment - Do not change!  Original value='131159.414823815zHtzfVcpttAtHQpAHtt' Name ='userSession' Type ='ResponseBased'*/
	web_reg_save_param_ex(
		"ParamName=userSession",
		"LB=name="userSession" value="",
		"RB="/>
<table border",
		SEARCH_FILTERS,
		"Scope=Body",
		"IgnoreRedirections=No",
		"RequestUrl=*/nav.pl*",
		LAST);

	web_url("WebTours", 
		"URL=http://127.0.0.1:1080/WebTours/", 
		"Resource=0", 
		"RecContentType=text/html", 
		"Referer=", 
		"Snapshot=t8.inf", 
		"Mode=HTML", 
		LAST);
		

	//登录
	web_submit_data("login.pl",
		"Action=http://127.0.0.1:1080/cgi-bin/login.pl",
		"Method=POST",
		"RecContentType=text/html",
		"Referer=http://127.0.0.1:1080/cgi-bin/nav.pl?in=home",
		"Snapshot=t9.inf",
		"Mode=HTML",
		ITEMDATA,
		"Name=userSession", "Value={userSession}", ENDITEM,
		"Name=username", "Value=jojo", ENDITEM,
		"Name=password", "Value=bean", ENDITEM,
		"Name=JSFormSubmit", "Value=on", ENDITEM,
		"Name=login.x", "Value=0", ENDITEM,
		"Name=login.y", "Value=0", ENDITEM,
		LAST);
	

	web_image("Search Flights Button", 
		"Alt=Search Flights Button", 
		"Snapshot=t10.inf", 
		LAST);
	
	lr_start_transaction("Flight");
	
	
	//步骤1：选择航班出发地和目的地及座位属性
	web_submit_form("reservations.pl", 
		"Snapshot=t11.inf", 
		ITEMDATA, 
		"Name=depart", "Value=Denver", ENDITEM, 
		"Name=departDate", "Value=04/24/2021", ENDITEM, 
		"Name=arrive", "Value=London", ENDITEM, 
		"Name=returnDate", "Value=04/25/2021", ENDITEM, 
		"Name=numPassengers", "Value=1", ENDITEM, 
		"Name=roundtrip", "Value=<OFF>", ENDITEM, 
		"Name=seatPref", "Value=None", ENDITEM, 
		"Name=seatType", "Value=Coach", ENDITEM, 
		"Name=findFlights.x", "Value=52", ENDITEM, 
		"Name=findFlights.y", "Value=6", ENDITEM, 
		LAST);
	

	
	//步骤2：选择乘坐航班
	web_submit_form("reservations.pl_2", 
		"Snapshot=t12.inf", 
		ITEMDATA, 
		"Name=outboundFlight", "Value=020;338;04/24/2021", ENDITEM, 
		"Name=reserveFlights.x", "Value=36", ENDITEM, 
		"Name=reserveFlights.y", "Value=5", ENDITEM, 
		LAST);
	
	lr_set_transaction_status(LR_FAIL);//修改事务状态
		
	if (lr_get_transaction_status("Flight") == LR_FAIL) {

     /* web_url has failed the transaction. No point in continuing, 
      * because future calls will probably fail too */
     lr_end_transaction("Flight", LR_FAIL);
     return 0;
	}
	
	//步骤3：完成支付
	status=web_submit_form("reservations.pl_3", 
		"Snapshot=t13.inf", 
		ITEMDATA, 
		"Name=firstName", "Value=Jojo", ENDITEM, 
		"Name=lastName", "Value=Bean", ENDITEM, 
		"Name=address1", "Value=", ENDITEM, 
		"Name=address2", "Value=", ENDITEM, 
		"Name=pass1", "Value=Jojo Bean", ENDITEM, 
		"Name=creditCard", "Value=", ENDITEM, 
		"Name=expDate", "Value=", ENDITEM, 
		"Name=saveCC", "Value=<OFF>", ENDITEM, 
		"Name=buyFlights.x", "Value=47", ENDITEM, 
		"Name=buyFlights.y", "Value=9", ENDITEM, 
		LAST);


	web_image("SignOff Button", 
		"Alt=SignOff Button", 
		"Ordinal=1", 
		"Snapshot=t14.inf", 
		LAST);
	return 0;
}

 可以看到，修改事务的状态后通过该函数成功获取修改后的事务最新状态。

11、lr_wasted_time

lr_wasted_time_Func() {
    int i, baseIter = 10;
    char dude[1000];
    double wasteTime, actualElapsedTime; 
    merc_timer_handle_t MasterT, timer;

    // Examine the total elapsed time of the action
    MasterT = lr_start_timer();

    //Start transaction
    lr_start_transaction("Demo");

    // Create some elapsed time for the transaction
    for (i=0; i< (10 * baseIter); ++i)
            sprintf(dude, "This is the way we create elapsed time artificially = %d", i);            

    // Add some think time
    lr_think_time(0.5);
    // Create some wasted time and record it with timer
    timer = lr_start_timer();

    for (i=0; i< (5 * baseIter); ++i)
            sprintf(dude, "This is the way we waste time in a script = %d", i);

    wasteTime = lr_end_timer(timer);
    lr_output_message("User created waste time = %lf", wasteTime);
    lr_output_message("Before lr_waste_time: Duration = %lf - Waste = %lf",        
        lr_get_transaction_duration("Demo"),
        lr_get_transaction_wasted_time("Demo"));
    /* Convert Timer in seconds to wasted time in milliseconds and add to internally generated waste time */
    wasteTime *= 1000;
    lr_wasted_time(wasteTime);
    lr_output_message("After lr_waste_time: Duration = %lf - Waste = %lf",
            lr_get_transaction_duration("Demo"),
            lr_get_transaction_wasted_time("Demo"));

    lr_output_message("Think time = %lf", 
        lr_get_transaction_think_time("Demo"));

    lr_end_transaction("Demo", LR_AUTO);
    actualElapsedTime = lr_end_timer(MasterT);
    lr_output_message("Total Elapsed time for Action = %lf", actualElapsedTime);
    return 0;
}

12、lr_fail_trans_with_error

lr_fail_trans_with_error_Func()
{
	int i, baseIter = 10;
    char dude[1000];
//Start Parent
    lr_start_transaction("Master");
    
 // Artificially create some elapsed time
    for (i=0; i<(20 * baseIter); ++i)
        sprintf(dude, 
            "This is the way we kill time in a script = %d", i);
    
    //Start a second sub transaction
    lr_start_sub_transaction("FirstT", "Master");    
	    for (i=0; i< (20 * baseIter); ++i)
	        sprintf(dude, 
	            "This is the way we kill time in a script = %d", i);
	    
			if (i>1)//超过1秒则修改事务状态为失败,并打印错误消息
				lr_fail_trans_with_error("An error has occurred,the time %d secs is more than 1 sec", i);

	
	lr_end_sub_transaction("FirstT",LR_AUTO);

    
    lr_end_transaction("Master", LR_PASS);
        
	return 0;
}

待续.....