# Register deserialization handlers for objects
# that will pass between server and client
from bootstrapvz.remote import register_deserialization_handlers
register_deserialization_handlers()


def waituntil(predicate, timeout=5, interval=0.05):
	import time
	threshhold = time.time() + timeout
	while time.time() < threshhold:
		if predicate():
			return True
		time.sleep(interval)
	return False


def read_from_socket(socket_path, termination_string, timeout):
		import socket
		import select
		import errno
		console = socket.socket(socket.AF_UNIX, socket.SOCK_STREAM)
		console.connect(socket_path)
		console.setblocking(0)

		output = ''
		ptr = 0
		continue_select = True
		nooutput_for = 0
		select_timeout = .5
		while continue_select:
			read_ready, _, _ = select.select([console], [], [], select_timeout)
			if console in read_ready:
				nooutput_for = 0
				while True:
					try:
						output += console.recv(1024)
						if termination_string in output[ptr:]:
							continue_select = False
						else:
							ptr = len(output) - len(termination_string)
						break
					except socket.error, e:
						if e.errno != errno.EWOULDBLOCK:
							raise Exception(e)
						continue_select = False
			else:
				nooutput_for += select_timeout
			if nooutput_for > timeout:
				from exceptions import SocketReadTimeout
				msg = ('Reading from socket `{path}\' timed out after {seconds} seconds.'
				       .format(path=socket_path, timeout=nooutput_for))
				raise SocketReadTimeout(msg)
		console.close()
		return output