bitbake: asyncrpc: Abstract sockets

Rewrites the asyncrpc client and server code to make it possible to have
other transport backends that are not stream based (e.g. websockets
which are message based). The connection handling classes are now shared
between both the client and server to make it easier to implement new
transport mechanisms

(Bitbake rev: 2aaeae53696e4c2f13a169830c3b7089cbad6eca)

Signed-off-by: Joshua Watt <JPEWhacker@gmail.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

bitbake/lib/hashserv/__init__.py

@@ -15,13 +15,6 @@ UNIX_PREFIX = "unix://"
 ADDR_TYPE_UNIX = 0
 ADDR_TYPE_TCP = 1
 
-# The Python async server defaults to a 64K receive buffer, so we hardcode our
-# maximum chunk size. It would be better if the client and server reported to
-# each other what the maximum chunk sizes were, but that will slow down the
-# connection setup with a round trip delay so I'd rather not do that unless it
-# is necessary
-DEFAULT_MAX_CHUNK = 32 * 1024
-
 UNIHASH_TABLE_DEFINITION = (
     ("method", "TEXT NOT NULL", "UNIQUE"),
     ("taskhash", "TEXT NOT NULL", "UNIQUE"),
@@ -102,20 +95,6 @@ def parse_address(addr):
         return (ADDR_TYPE_TCP, (host, int(port)))
 
 
-def chunkify(msg, max_chunk):
-    if len(msg) < max_chunk - 1:
-        yield ''.join((msg, "\n"))
-    else:
-        yield ''.join((json.dumps({
-                'chunk-stream': None
-            }), "\n"))
-
-        args = [iter(msg)] * (max_chunk - 1)
-        for m in map(''.join, itertools.zip_longest(*args, fillvalue='')):
-            yield ''.join(itertools.chain(m, "\n"))
-        yield "\n"
-
-
 def create_server(addr, dbname, *, sync=True, upstream=None, read_only=False):
     from . import server
     db = setup_database(dbname, sync=sync)