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// Copyright Yahoo. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
/**
* @file exceptions.h
* @ingroup util
*
* @brief Various common exception classes.
*
* @author H�kon Humberset
* @date 2004-03-31
* @version $Id$
*/
#pragma once
#include "exception.h"
#include "stringfmt.h"
#include <memory>
namespace vespalib {
#ifdef IAM_DOXYGEN
/**
* @class vespalib::UnsupportedOperationException
* @brief Exception telling that the requested operation is not supported.
**/
/**
* @class vespalib::IllegalArgumentException
* @brief Exception telling that illegal arguments was passed to a function.
**/
/**
* @class vespalib::IllegalStateException
* @brief Exception telling that the object has an illegal state.
**/
/**
* @class vespalib::OverflowException
* @brief XXX - Exception telling that some sort of overflow happened? unused
**/
/**
* @class vespalib::UnderflowException
* @brief XXX - Exception telling that some sort of underflow happened? unused
**/
/**
* @class vespalib::FatalException
* @brief Something went seriously wrong and the application should terminate
**/
#else
VESPA_DEFINE_EXCEPTION(UnsupportedOperationException, Exception);
VESPA_DEFINE_EXCEPTION(IllegalArgumentException, Exception);
VESPA_DEFINE_EXCEPTION(IllegalStateException, Exception);
VESPA_DEFINE_EXCEPTION(OverflowException, Exception);
VESPA_DEFINE_EXCEPTION(UnderflowException, Exception);
VESPA_DEFINE_EXCEPTION(TimeoutException, Exception);
VESPA_DEFINE_EXCEPTION(FatalException, Exception);
VESPA_DEFINE_EXCEPTION(NetworkSetupFailureException, IllegalStateException);
#endif
//-----------------------------------------------------------------------------
/**
* @brief Exception indicating the failure to listen for connections
* on a socket.
**/
class ExceptionWithPayload : public std::exception {
public:
class Anything {
public:
using UP = std::unique_ptr<Anything>;
virtual ~Anything() = default;
};
explicit ExceptionWithPayload(vespalib::stringref msg);
ExceptionWithPayload(vespalib::stringref msg, Anything::UP payload);
ExceptionWithPayload(ExceptionWithPayload &&) noexcept;
ExceptionWithPayload & operator = (ExceptionWithPayload &&) noexcept;
~ExceptionWithPayload() override;
void setPayload(Anything::UP payload) { _payload = std::move(payload); }
const char * what() const noexcept override;
private:
vespalib::string _msg;
Anything::UP _payload;
};
class OOMException : public ExceptionWithPayload {
public:
explicit OOMException(vespalib::stringref msg) : ExceptionWithPayload(msg) { }
OOMException(vespalib::stringref msg, Anything::UP payload) : ExceptionWithPayload(msg, std::move(payload)) { }
};
/**
* @brief Exception indicating the failure to listen for connections
* on a socket.
**/
class PortListenException : public Exception
{
private:
int _port;
vespalib::string _protocol;
vespalib::string make_message(int port, vespalib::stringref protocol, vespalib::stringref msg);
public:
PortListenException(int port, vespalib::stringref protocol, vespalib::stringref msg = "",
vespalib::stringref location = "", int skipStack = 0);
PortListenException(int port, vespalib::stringref protocol, const Exception &cause, vespalib::stringref msg = "",
vespalib::stringref location = "", int skipStack = 0);
PortListenException(PortListenException &&) noexcept;
PortListenException & operator = (PortListenException &&) noexcept;
PortListenException(const PortListenException &);
PortListenException & operator = (const PortListenException &);
~PortListenException() override;
VESPA_DEFINE_EXCEPTION_SPINE(PortListenException);
int get_port() const { return _port; }
const vespalib::string &get_protocol() const { return _protocol; }
};
//-----------------------------------------------------------------------------
/**
* @brief Exception signaling that some sort of I/O error happened.
**/
class IoException : public Exception {
public:
enum Type { UNSPECIFIED,
ILLEGAL_PATH, NO_PERMISSION, DISK_PROBLEM,
INTERNAL_FAILURE, NO_SPACE, NOT_FOUND, CORRUPT_DATA,
TOO_MANY_OPEN_FILES, DIRECTORY_HAVE_CONTENT, FILE_FULL,
ALREADY_EXISTS };
IoException(stringref msg, Type type, stringref location, int skipStack = 0);
IoException(stringref msg, Type type, const Exception& cause, stringref location, int skipStack = 0);
IoException(const IoException &);
IoException & operator =(const IoException &) = delete;
IoException(IoException &&) noexcept;
IoException & operator =(IoException &&) noexcept;
~IoException() override;
VESPA_DEFINE_EXCEPTION_SPINE(IoException);
static string createMessage(stringref msg, Type type);
Type getType() const { return _type; }
/** Use this function as a way to map error from errno to a Type. */
static Type getErrorType(int error);
private:
Type _type;
};
class SilenceUncaughtException : public ExceptionWithPayload::Anything {
public:
SilenceUncaughtException(const SilenceUncaughtException &) = delete;
SilenceUncaughtException & operator = (const SilenceUncaughtException &) = delete;
SilenceUncaughtException(SilenceUncaughtException &&) noexcept = delete;
SilenceUncaughtException & operator=(SilenceUncaughtException &&) noexcept = delete;
SilenceUncaughtException(const std::exception & e);
~SilenceUncaughtException() override;
private:
std::terminate_handler _oldTerminate;
};
/**
* NOTE: This function must only be called from within a catch block,
* and the parameter must reference the caught exception.
*
* Based on the run-time type of the exception, determine if it is
* safe to handle this exception and continue normal program
* operation. If the exception is considered safe, no additional
* action is taken. If the exception is considered unsafe, it will be
* re-thrown.
*
* Unsafe exceptions fall under two categories; exceptions that are
* specifically designed to end program execution and exceptions that
* have an elevated chance of causing issues when being thrown across
* code that is not completely exception safe.
**/
void rethrow_if_unsafe(const std::exception &e);
}
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