mirror of https://github.com/Icinga/icinga2.git
147 lines
3.8 KiB
C++
147 lines
3.8 KiB
C++
/******************************************************************************
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* Icinga 2 *
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* Copyright (C) 2012 Icinga Development Team (http://www.icinga.org/) *
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* *
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* This program is free software; you can redistribute it and/or *
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* modify it under the terms of the GNU General Public License *
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* as published by the Free Software Foundation; either version 2 *
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* of the License, or (at your option) any later version. *
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* *
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* This program is distributed in the hope that it will be useful, *
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* but WITHOUT ANY WARRANTY; without even the implied warranty of *
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the *
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* GNU General Public License for more details. *
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* *
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* You should have received a copy of the GNU General Public License *
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* along with this program; if not, write to the Free Software Foundation *
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA. *
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******************************************************************************/
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#ifndef ATTRIBUTE_H
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#define ATTRIBUTE_H
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#include "base/value.h"
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namespace icinga
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{
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/**
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* The type of an attribute for a DynamicObject.
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*
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* @ingroup base
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*/
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enum AttributeType
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{
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Attribute_Transient = 1,
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/* Unlike transient attributes local attributes are persisted
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* in the program state file. */
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Attribute_Local = 2,
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/* Replicated attributes are sent to other daemons for which
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* replication is enabled. */
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Attribute_Replicated = 4,
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/* Attributes read from the config file are implicitly marked
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* as config attributes. */
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Attribute_Config = 8,
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/* Combination of all attribute types */
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Attribute_All = Attribute_Transient | Attribute_Local | Attribute_Replicated | Attribute_Config
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};
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class I2_BASE_API AttributeBase
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{
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public:
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AttributeBase(void);
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void Set(const Value& value);
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Value Get(void) const;
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operator Value(void) const;
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bool IsEmpty(void) const;
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protected:
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void InternalSet(const Value& value);
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const Value& InternalGet(void) const;
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private:
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Value m_Value;
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AttributeBase(const AttributeBase& other);
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AttributeBase& operator=(const AttributeBase& other);
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};
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template<typename T>
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class Attribute : public AttributeBase
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{
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public:
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/**
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* @threadsafety Always.
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*/
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void Set(const T& value)
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{
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AttributeBase::Set(value);
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}
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/**
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* @threadsafety Always.
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*/
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Attribute<T>& operator=(const T& rhs)
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{
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Set(rhs);
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return *this;
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}
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T Get(void) const
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{
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Value value = AttributeBase::Get();
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if (value.IsEmpty())
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return T();
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return static_cast<T>(value);
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}
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/**
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* @threadsafety Always.
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*/
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operator T(void) const
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{
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return Get();
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}
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};
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/**
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* An attribute for a DynamicObject.
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*
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* @ingroup base
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*/
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class I2_BASE_API AttributeHolder
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{
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public:
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AttributeHolder(AttributeType type, AttributeBase *boundAttribute = NULL);
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AttributeHolder(const AttributeHolder& other);
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~AttributeHolder(void);
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void Bind(AttributeBase *boundAttribute);
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void SetValue(double tx, const Value& value);
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Value GetValue(void) const;
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void SetType(AttributeType type);
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AttributeType GetType(void) const;
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void SetTx(double tx);
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double GetTx(void) const;
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private:
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AttributeType m_Type; /**< The type of the attribute. */
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double m_Tx; /**< The timestamp of the last value change. */
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bool m_OwnsAttribute; /**< Whether we own the Data pointer. */
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AttributeBase *m_Attribute; /**< The current value of the attribute. */
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};
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}
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#endif /* ATTRIBUTE_H */
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