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Error handling and logging in C++ class design include: Exception handling: Capture and handle exceptions, and use custom exception classes to provide specific error information. Error code: Use an integer or enumeration to represent the error condition and return it in the return value. Assertion: Verify pre- and post-conditions, and throw an exception if they are not met. C++ library logging: Basic logging using std::cerr and std::clog. External logging libraries: Integrate third-party libraries for advanced features such as level filtering and log file rotation. Custom log class: Create your own log class, abstract the underlying mechanism, and provide a common interface to record different levels of information.
Error handling and logging in C++ class design
In C++ programming, robust error handling and logging mechanism Essential for building stable and reliable applications. This article explores how to implement effective error handling and logging in class design.
Error handling
try-catch
statement to catch exceptions and take action based on the exception type appropriate measures. Customize the exception class by inheriting the exception
class to provide specific error information. assert()
macro to verify pre- and post-conditions in your code and throw an exception if the condition does not hold. Logging
std::cerr
and std::clog
Stream for basic logging. Practical Case
Consider a reader-writer problem in which a reader thread and a writer thread concurrently access a shared data structure. The following example shows how to use exception handling and logging to handle potential concurrency issues:
class DataStructure { public: void read() { try { // 读操作 } catch (const std::exception& e) { log_error(e); } } void write() { try { // 写操作 } catch (const std::exception& e) { log_error(e); } } private: void log_error(const std::exception& e) { std::cerr << "错误信息: " << e.what() << std::endl; } };
By catching exceptions on read and write operations, we ensure that concurrency issues do not crash the application, but instead Log as an error and continue execution.
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