lr_resume_transaction_instance

Resumes reporting transaction instance data within a script.

void lr_resume_transaction_instance( long trans_handle );  

Arguments

The lr_resume_transaction_instance function resumes the reporting of transaction data within the script that was suspended by lr_stop_transaction_instance. After a call to lr_stop_transaction_instance, statistics returned by the "get" Transaction Functions reflect only the data up to that call, until this function is called.

Data collection, however, is not interrupted. After the call to lr_resume_transaction_instance, the "get" functions return all data since the start of the transaction. Furthermore, the final results when the test is analyzed will reflect the total values, including the periods in between the transaction instance stop and resume.

If lr_resume_transaction_instance is not called, the final results reflect the statistics only until the call to lr_stop_transaction_instance.

The parent_handle is the value returned from the call to lr_start_transaction_instance that created the instance.

lr_stop_transaction_instance and lr_resume_transaction_instance can be used to conditionally collect information about either the beginning, or all of the transaction.

Note that you will not be able to differentiate in analysis between iterations when lr_stop_transaction_instance was called and iterations where it was not.

For more flexible ways recording transaction times conditionally, see lr_start_sub_transaction, lr_set_transaction, and lr_start_timer

Return Values

No value is returned.

Parameterization

You cannot use standard parameterization for any arguments in this function.

Example

In the following example, lr_stop_transaction_instance and lr_resume_transaction_instance show the effect of stopping and resuming the instance.

Action() {
    int i;
    int iteration = 1000;
    char aStr[100];
    long trans_handle;

    /* The handle argument of zero indicates 
        that there is no parent transaction */

    trans_handle = lr_start_transaction_instance("Stop&Start", 0);

    /* Do part of business process. Represented
        here by loop to ensure that some 
        time passes. */

    for (i=0; i < iteration; ++i) {
        sprintf(aStr, "%d", i);    
      //lr_log_message("%d",i);
    }

    /* Output the duration to this point 
        with transaction instance active */

    lr_output_message("First time = %f", 
        lr_get_trans_instance_duration(trans_handle));

    // Stop the transaction instance

    lr_stop_transaction_instance(trans_handle);

    /* Output the duration to this point 
        with transaction stopped */

    lr_output_message("Immediately after stop = %f", 
        lr_get_trans_instance_duration(trans_handle));

    // Ensure that some time passes

    for (i=0; i < iteration; ++i) {
        sprintf(aStr, "%d", i);
        //lr_log_message("%d",i);
    }

    /* Output the duration to this point 
        with transaction instance still stopped but 
        more time passed. Note that time is the same.
        The time spent in the loop while the transaction
        instance was stopped is not reported. */

    lr_output_message("After stop and loop = %f", 
        lr_get_trans_instance_duration(trans_handle));

    // Resume the transaction instance

    lr_resume_transaction_instance(trans_handle);

    /* Note that with the instance resumed, 
        all the time passed since the start is 
        reported, including the time spent in the
        loop while the instance was stopped. */

    lr_output_message("After resume time = %f", 
        lr_get_trans_instance_duration(trans_handle));

    // Add time to duration

    for (i=0; i < iteration; ++i) {
        sprintf(aStr, "%d", i);
        //lr_log_message("%d",i);
}

    /* Total time reported */

    lr_output_message("After resume and loop = %f", 
        lr_get_trans_instance_duration(trans_handle));

    // End transaction instance

    lr_end_transaction_instance(trans_handle, LR_AUTO);
    return 0;
}

Example: Output:
Action.c(14): Notify: Transaction Stop&Start started.
   
Action.c(26): First time = 0.609375
Action.c(31): Notify: Transaction Stop&Start stopped.
Action.c(36): Immediately after stop = 0.609375
Action.c(50): After stop and loop = 0.609375
Action.c(54): Notify: Transaction Stop&Start resumed.
Action.c(60): After resume time = 1.250000
Action.c(70): After resume and loop = 1.859375
Action.c(75): Notify: Transaction Stop&Start ended with Pass status (Duration: 1.8594).