rosbridge_library.capabilities.fragmentation.Fragmentation Class Reference

Inheritance diagram for rosbridge_library.capabilities.fragmentation.Fragmentation:

Public Member Functions
def	__init__ (self, protocol)
def	fragment (self, message, fragment_size, mid=None)
Public Member Functions inherited from rosbridge_library.capability.Capability
def	__init__ (self, protocol)
def	basic_type_check (self, msg, types_info)
def	finish (self)
def	handle_message (self, message)

Public Attributes
	fragmentation_seed
Public Attributes inherited from rosbridge_library.capability.Capability
	protocol

Static Public Attributes
int	fragmentation_seed = 0

Private Member Functions
def	_create_fragment (self, fragment, num, total, mid)
def	_fragment_generator (self, msg, size, mid)

Detailed Description

The Fragmentation capability doesn't define any incoming operation
handlers, but provides methods to fragment outgoing messages 

Definition at line 37 of file fragmentation.py.

Constructor & Destructor Documentation

__init__()

def rosbridge_library.capabilities.fragmentation.Fragmentation.__init__	(		self,
			protocol
	)

Definition at line 43 of file fragmentation.py.

Member Function Documentation

_create_fragment()

def rosbridge_library.capabilities.fragmentation.Fragmentation._create_fragment (   self,   fragment,   num,   total,   mid  )

private

Given a string fragment of the original message, creates
the appropriate fragment message 

Definition at line 97 of file fragmentation.py.

_fragment_generator()

def rosbridge_library.capabilities.fragmentation.Fragmentation._fragment_generator (   self,   msg,   size,   mid  )

private

Returns a generator of fragment messages 

Definition at line 88 of file fragmentation.py.

fragment()

def rosbridge_library.capabilities.fragmentation.Fragmentation.fragment	(		self,
			message,
			fragment_size,
			mid = None
	)

Serializes the provided message, then splits the serialized
message according to fragment_size, then sends the fragments.

If the size of the message is less than the fragment size, then
the original message is returned rather than a single fragment

Since fragmentation is typically only used for very large messages,
this method returns a generator for fragments rather than a list

Keyword Arguments
message       -- the message dict object to be fragmented
fragment_size -- the max size for the fragments
mid           -- (optional) if provided, the fragment messages
will be given this id.  Otherwise an id will be auto-generated.

Returns a generator of message dict objects representing the fragments

Definition at line 47 of file fragmentation.py.

Member Data Documentation

fragmentation_seed [1/2]

int rosbridge_library.capabilities.fragmentation.Fragmentation.fragmentation_seed = 0

static

Definition at line 41 of file fragmentation.py.

fragmentation_seed [2/2]

rosbridge_library.capabilities.fragmentation.Fragmentation.fragmentation_seed

Definition at line 68 of file fragmentation.py.

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

• fragmentation.py