Loadrunner Unique Names

It is useful to be able to create human-readable unique names to be used for filenames, database keys, logging, etc.  One way to do this is to create a string with the following information:

• load generator name
• vuser id
• iteration number
• timestamp

This can be done easily as follows:

• get load generator name using lr_get_host_name()
• get vuser id using lr_whoami()
• get iteration number using a parameter of type iteration
• get current timestamp using lr_save_datetime()

The following script shows how to do this.

Script

Action()

{

int id

char *host; 

        // get load generator name

host = lr_get_host_name( ); 

//lr_output_message("Host: %s", host);

// get vuser id

lr_whoami(&id, NULL, NULL);

//lr_message( "Vuser id: %d",  id);

        // for iteration add a parameter named "Iteration" of type Iteration

//lr_output_message(lr_eval_string("Iteration: {Iteration}")); 

        // get timestamp, formatted as wanted

        lr_save_datetime("%m-%d-%Y-%I%M%S%p", DATE_NOW, "now"); 

//lr_output_message(lr_eval_string("Time: {now}"));

        // now generate the nice, readable unique id

lr_output_message(lr_eval_string("Host-%s-VuserId-%d-Iteration-{Iteration}-Time-{now}"),host, id);

return 0;

}

Output

Action.c(20): Host-generator02-VuserId-1-Iteration-1-Time-09-13-2012-035856PM [MsgId: MMSG-17999]

Action.c(20): Host-generator02-VuserId-2-Iteration-1-Time-09-13-2012-035856PM [MsgId: MMSG-17999]

Action.c(20): Host-generator02-VuserId-1-Iteration-2-Time-09-13-2012-035857PM [MsgId: MMSG-

Action.c(20): Host-generator02-VuserId-2-Iteration-2-Time-09-13-2012-035857PM [MsgId: MMSG-17999

Action.c(20): Host-generator02-VuserId-1-Iteration-3-Time-09-13-2012-035858PM [MsgId: MMSG-17999]