exception.h revision 303975
1/*- 2 * Copyright (c) 2011, 2012, 2013 Spectra Logic Corporation 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions, and the following disclaimer, 10 * without modification. 11 * 2. Redistributions in binary form must reproduce at minimum a disclaimer 12 * substantially similar to the "NO WARRANTY" disclaimer below 13 * ("Disclaimer") and any redistribution must be conditioned upon 14 * including a substantially similar Disclaimer requirement for further 15 * binary redistribution. 16 * 17 * NO WARRANTY 18 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 19 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 20 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR 21 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 22 * HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 23 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 24 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 25 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, 26 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING 27 * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 28 * POSSIBILITY OF SUCH DAMAGES. 29 * 30 * Authors: Justin T. Gibbs (Spectra Logic Corporation) 31 * 32 * $FreeBSD: releng/11.0/lib/libdevdctl/exception.h 300906 2016-05-28 17:43:40Z asomers $ 33 */ 34 35/** 36 * \file zfsd_exception.h 37 * 38 * Definition of the ZfsdException class hierarchy. All exceptions 39 * explicitly thrown by Zfsd are defined here. 40 */ 41#ifndef _DEVDCTL_EXCEPTION_H_ 42#define _DEVDCTL_EXCEPTION_H_ 43 44/*============================ Namespace Control =============================*/ 45namespace DevdCtl 46{ 47 48/*============================= Class Definitions ============================*/ 49 50/*--------------------------------- Exception --------------------------------*/ 51/** 52 * \brief Class allowing unified reporting/logging of exceptional events. 53 */ 54class Exception 55{ 56public: 57 /** 58 * \brief Exception constructor allowing arbitrary string 59 * data to be reported. 60 * 61 * \param fmt Printf-like string format specifier. 62 */ 63 Exception(const char *fmt, ...); 64 65 /** 66 * \brief Augment/Modify a Exception's string data. 67 */ 68 std::string& GetString(); 69 70 /** 71 * \brief Emit exception data to syslog(3). 72 */ 73 virtual void Log() const; 74 75protected: 76 Exception(); 77 78 /** 79 * \brief Convert exception string format and arguments provided 80 * in event constructors into a linear string. 81 */ 82 void FormatLog(const char *fmt, va_list ap); 83 84 std::string m_log; 85}; 86 87inline std::string & 88Exception::GetString() 89{ 90 return (m_log); 91} 92 93/*------------------------------ ParseException ------------------------------*/ 94/** 95 * Exception thrown when an event string is not converted to an actionable 96 * Event object. 97 */ 98class ParseException : public Exception 99{ 100public: 101 enum Type 102 { 103 /** Improperly formatted event string encountered. */ 104 INVALID_FORMAT, 105 106 /** No handlers for this event type. */ 107 DISCARDED_EVENT_TYPE, 108 109 /** Unhandled event type. */ 110 UNKNOWN_EVENT_TYPE 111 }; 112 113 /** 114 * Constructor 115 * 116 * \param type The type of this exception. 117 * \param parsedBuffer The parsing buffer active at the time of 118 * the exception. 119 * \param offset The location in the parse buffer where this 120 * exception occurred. 121 */ 122 ParseException(Type type, const std::string &parsedBuffer, 123 size_t offset = 0); 124 125 /** 126 * Accessor 127 * 128 * \return The classification for this exception. 129 */ 130 Type GetType() const; 131 132 /** 133 * Accessor 134 * 135 * \return The offset into the event string where this exception 136 * occurred. 137 */ 138 size_t GetOffset() const; 139 140private: 141 /** The type of this exception. */ 142 Type m_type; 143 144 /** The parsing buffer that was active at the time of the exception. */ 145 const std::string m_parsedBuffer; 146 147 /** 148 * The offset into the event string buffer from where this 149 * exception was triggered. 150 */ 151 size_t m_offset; 152}; 153 154//- ParseException Inline Const Public Methods --------------------------------- 155inline ParseException::Type 156ParseException::GetType() const 157{ 158 return (m_type); 159} 160 161inline size_t 162ParseException::GetOffset() const 163{ 164 return (m_offset); 165} 166 167} // namespace DevdCtl 168#endif /* _DEVDCTL_EXCEPTION_H_ */ 169