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145 lines
4.3 KiB
C++
145 lines
4.3 KiB
C++
#pragma once
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#include <cerrno>
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#include <vector>
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#include <memory>
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#include <Poco/Exception.h>
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#include <Common/StackTrace.h>
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namespace Poco { class Logger; }
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namespace DB
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{
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namespace ErrorCodes
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{
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extern const int POCO_EXCEPTION;
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extern const int METRIKA_OTHER_ERROR;
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}
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class Exception : public Poco::Exception
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{
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public:
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Exception() {} /// For deferred initialization.
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Exception(const std::string & msg, int code) : Poco::Exception(msg, code) {}
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Exception(const std::string & msg, const Exception & nested_exception, int code)
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: Poco::Exception(msg, nested_exception, code), trace(nested_exception.trace) {}
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enum CreateFromPocoTag { CreateFromPoco };
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Exception(CreateFromPocoTag, const Poco::Exception & exc) : Poco::Exception(exc.displayText(), ErrorCodes::POCO_EXCEPTION) {}
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Exception * clone() const override { return new Exception(*this); }
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void rethrow() const override { throw *this; }
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const char * name() const throw() override { return "DB::Exception"; }
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const char * what() const throw() override { return message().data(); }
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/// Add something to the existing message.
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void addMessage(const std::string & arg) { extendedMessage(arg); }
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const StackTrace & getStackTrace() const { return trace; }
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private:
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StackTrace trace;
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const char * className() const throw() override { return "DB::Exception"; }
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};
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/// Contains an additional member `saved_errno`. See the throwFromErrno function.
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class ErrnoException : public Exception
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{
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public:
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ErrnoException(const std::string & msg, int code, int saved_errno_)
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: Exception(msg, code), saved_errno(saved_errno_) {}
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ErrnoException * clone() const override { return new ErrnoException(*this); }
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void rethrow() const override { throw *this; }
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int getErrno() const { return saved_errno; }
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private:
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int saved_errno;
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const char * name() const throw() override { return "DB::ErrnoException"; }
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const char * className() const throw() override { return "DB::ErrnoException"; }
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};
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using Exceptions = std::vector<std::exception_ptr>;
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std::string errnoToString(int code, int the_errno = errno);
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[[noreturn]] void throwFromErrno(const std::string & s, int code, int the_errno = errno);
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/** Try to write an exception to the log (and forget about it).
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* Can be used in destructors in the catch-all block.
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*/
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void tryLogCurrentException(const char * log_name, const std::string & start_of_message = "");
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void tryLogCurrentException(Poco::Logger * logger, const std::string & start_of_message = "");
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/** Prints current exception in canonical format.
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* with_stacktrace - prints stack trace for DB::Exception.
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* check_embedded_stacktrace - if DB::Exception has embedded stacktrace then
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* only this stack trace will be printed.
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*/
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std::string getCurrentExceptionMessage(bool with_stacktrace, bool check_embedded_stacktrace = false);
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/// Returns error code from ErrorCodes
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int getCurrentExceptionCode();
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/// An execution status of any piece of code, contains return code and optional error
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struct ExecutionStatus
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{
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int code = 0;
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std::string message;
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ExecutionStatus() = default;
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explicit ExecutionStatus(int return_code, const std::string & exception_message = "")
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: code(return_code), message(exception_message) {}
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static ExecutionStatus fromCurrentException(const std::string & start_of_message = "");
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std::string serializeText() const;
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void deserializeText(const std::string & data);
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bool tryDeserializeText(const std::string & data);
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};
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void tryLogException(std::exception_ptr e, const char * log_name, const std::string & start_of_message = "");
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void tryLogException(std::exception_ptr e, Poco::Logger * logger, const std::string & start_of_message = "");
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std::string getExceptionMessage(const Exception & e, bool with_stacktrace, bool check_embedded_stacktrace = false);
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std::string getExceptionMessage(std::exception_ptr e, bool with_stacktrace);
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void rethrowFirstException(const Exceptions & exceptions);
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template <typename T>
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std::enable_if_t<std::is_pointer_v<T>, T> exception_cast(std::exception_ptr e)
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{
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try
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{
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std::rethrow_exception(std::move(e));
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}
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catch (std::remove_pointer_t<T> & concrete)
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{
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return &concrete;
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}
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catch (...)
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{
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return nullptr;
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}
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}
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}
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