LoadRunner如何在脚本运行时修改log设置选项

LoadRunner如何在脚本运行时修改log设置选项?答案是使用lr_set_debug_message函数:

lr_set_debug_message

Sets the message level for the script execution.

int lr_set_debug_message (unsigned int message_level, unsigned int on_off);

例子:

lr_set_debug_message(LR_MSG_CLASS_EXTENDED_LOG |             LR_MSG_CLASS_FULL_TRACE, LR_SWITCH_ON );

rc = lrd_fetch(Csr1, 1, 1, 0, PrintRow3);

if (rc>2000)

lr_debug_message(LR_MSG_CLASS_FULL_TRACE, 
             "Fetch failed returned %d", rc);

/* Now reset message class to former level */
lr_set_debug_message(LR_MSG_CLASS_EXTENDED_LOG |             LR_MSG_CLASS_FULL_TRACE, LR_SWITCH_OFF );

参数message_level的设置与LR的run-time设置界面中的选项有对应关系,可参考下表以及LR的帮助文档:

Each logging option has a C-constant that is a binary value with a 1 in the position that corresponds to the log option.

Log Level

C Constant

Value

Binary Value

Disabled

LR_MSG_CLASS_DISABLE_LOG

0

00000000 00000000

Brief

LR_MSG_CLASS_BRIEF_LOG

1

00000000 00000001

Extended Log

LR_MSG_CLASS_EXTENDED_LOG

16

00000000 00010000

Result Data

LR_MSG_CLASS_RESULT_DATA

2

00000000 00000010

Parameter Substitution

LR_MSG_CLASS_PARAMETERS

4

00000000 00000100

Full Run-Time Trace

LR_MSG_CLASS_FULL_TRACE

8

00000000 00001000

Log on Error

LR_MSG_CLASS_JIT_LOG_ON_ERROR

512

00000010 00000000

在脚本动态设置log选项前,可以采用下面的函数来清空已有的设置:

// Turn off all logging options (this is the same as having logging disabled).
void jds_clear_log_options(void) {
      unsigned int log_options = lr_get_debug_message();
      lr_set_debug_message(log_options, LR_SWITCH_OFF); 
      return;
}

脚本中使用了lr_get_debug_message函数来取得当前的设置。

参考:

http://www.jds.net.au/tech-tips/loadrunner-log-options/

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