FileVarRW Class Reference

Inheritance diagram for FileVarRW:

List of all members.

Classes
class	Error
Public Member Functions
const Element &	read (const Id &)
	Read a variable from a route [such as nexthop].
void	write (const Id &, const Element &)
	Write a variable to a route.
void	sync ()
	VarRW must perform all pending writes to the route now.
void	printVars ()
void	load (const string &fname)
void	set_verbose (bool)
Private Member Functions
bool	doLine (const string &line)
void	clear_trash ()
Private Attributes
const Element *	_map [VAR_MAX]
ElementFactory	_ef
Element *	_trash [MAX_TRASH]
int	_trashc
bool	_verbose
Static Private Attributes
static const int	MAX_TRASH = 666

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Member Function Documentation

const Element & FileVarRW::read

(

const Id &

id

)

[virtual]

Read a variable from a route [such as nexthop].

If the protocol doesn't support the requested variable, and exception should be thrown.

If the variable is not present in the current route, then an ElemNull should be returned [for example if ipv6 is requested on a v4 route].

VarRW is responsible for deleting the object read [it owns it]. However care must be taken not to delete objects that were obtained by write() even though we pass them to read() later.

Returns:

Element requested, or ElemNull of element is not available.

Parameters:

id	The variable that is being requested [such as metric].

Implements VarRW.

void FileVarRW::sync

(

)

[virtual]

VarRW must perform all pending writes to the route now.

This is usefull in scenarios where VarRW decides to cache read and writes and perform the actual writes at the end [i.e. it stores pointers to elements].

All pointers to elements [by write] may become invalid after a sync.

Reimplemented from VarRW.

void FileVarRW::write	(	const Id &	id,
		const Element &	e
	)		[virtual]

Write a variable to a route.

VarRW does not own Element, so it must not delete it.

Parameters:

id	Identifier of variable that must be written to.
e	Value that must be written to the variable.

Implements VarRW.

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The documentation for this class was generated from the following files:

• /home/greearb/git/xorp.ct.github/xorp/policy/tests/file_varrw.hh
• /home/greearb/git/xorp.ct.github/xorp/policy/tests/file_varrw.cc