Provides the classes associated with logs.

Class TraceInterceptorprovides AOP implementation to insert codes to the beginning and end of an associated method. This class can not be used independently. See more details of this class in Javadoc.

Classes ExceptionInterceptor and LoggingHelper jointly provide methods to Intercept runtime exceptions, and then send logs or exceptions to the remote server. The Arrow WebService provides interface and WSDL, and uses REST-Style to post the data.