Subject: How does a solid state diode work?

I find all of the online and text book informations incomplete. say i take a 
forward biased diode arrangement (+)---P/N---(-)the text book states that the 
holes in the p transistor move away from the (+) terminal and into the n type 
transistor while the electrons in the n type move into the P type. I find this 
is incomplete. What about the electrons in the rest of the circuit what are 
they doing? and also what happens when all the holes in the P type transistor 
have swapped with the electrons in the n type transistor. wouldnt the current 
stop flowing?

Re: How does a solid state diode work?