Class MarshalledEvent

Class to contain an event marshalled into the wire form.

Typical uses:

App reads data according to a wire protocol that matches
the protocol used here (pkt size + pickling). (This is a flaw
in the design of this, but as this is an attempt to partially
encapsulate something that's currently not at all encapsulated
it is sufficient if used with care):

myData = (get the data somehow)
me = MarshalledEvent()
me.SetData(myData)
myEvent = me.GetEvent()

App has an event that it wants to send to multiple file handles:

me = MarshalledEvent()
me.SetEvent(myEvent)
for fh in handles():
    me.Write(fh)

Unmarshall the event object from the binary data held internally.

Set the binary data of the event.

Create the marshalled form of the event and hold it internally.

Write the binary data out to the specified filehandle.