Questions:
I am using some library in my maven based project. The jar of this library may/may not contain some other dependent libraries.
I am calling xyz function of this library. There is a requirement where I need to check time taken by each of the functions that are called inside xyz function. These functions may/ may not be publicly accessible.
Any idea how to do this ? Would aspect work in such scenario ?
How to&Answers:
Yes, aspects should work. Here is the small example for spring package
private final Logger log = LoggerFactory.getLogger(this.getClass());
@Pointcut("within(@org.springframework.stereotype.Repository *)")
public void springBeanPointcut() {
}
@Around("springBeanPointcut()")
public Object logAround(ProceedingJoinPoint joinPoint) throws Throwable {
if (log.isDebugEnabled()) {
log.debug("Enter: {}.{}()",
joinPoint.getSignature().getDeclaringTypeName(),
joinPoint.getSignature().getName());
}
try {
Object result = joinPoint.proceed();
if (log.isDebugEnabled()) {
log.debug("Exit: {}.{}()",
joinPoint.getSignature().getDeclaringTypeName(),
joinPoint.getSignature().getName());
}
return result;
} catch (IllegalArgumentException e) {
log.error("Error:{}.{}()",
joinPoint.getSignature().getDeclaringTypeName(),
joinPoint.getSignature().getName());
throw e;
}
}
Configure your logger format for logging millisecond time log, or just put your logic to compute the time taken.
Tags: exception, function, javajava, performance, time
