|
|
# test-batching.py - tests for transparent command batching
|
|
|
#
|
|
|
# Copyright 2011 Peter Arrenbrecht <peter@arrenbrecht.ch>
|
|
|
#
|
|
|
# This software may be used and distributed according to the terms of the
|
|
|
# GNU General Public License version 2 or any later version.
|
|
|
|
|
|
from __future__ import absolute_import, print_function
|
|
|
|
|
|
from mercurial import (
|
|
|
peer,
|
|
|
wireproto,
|
|
|
)
|
|
|
|
|
|
# equivalent of repo.repository
|
|
|
class thing(object):
|
|
|
def hello(self):
|
|
|
return "Ready."
|
|
|
|
|
|
# equivalent of localrepo.localrepository
|
|
|
class localthing(thing):
|
|
|
def foo(self, one, two=None):
|
|
|
if one:
|
|
|
return "%s and %s" % (one, two,)
|
|
|
return "Nope"
|
|
|
def bar(self, b, a):
|
|
|
return "%s und %s" % (b, a,)
|
|
|
def greet(self, name=None):
|
|
|
return "Hello, %s" % name
|
|
|
def batch(self):
|
|
|
'''Support for local batching.'''
|
|
|
return peer.localbatch(self)
|
|
|
|
|
|
# usage of "thing" interface
|
|
|
def use(it):
|
|
|
|
|
|
# Direct call to base method shared between client and server.
|
|
|
print(it.hello())
|
|
|
|
|
|
# Direct calls to proxied methods. They cause individual roundtrips.
|
|
|
print(it.foo("Un", two="Deux"))
|
|
|
print(it.bar("Eins", "Zwei"))
|
|
|
|
|
|
# Batched call to a couple of (possibly proxied) methods.
|
|
|
batch = it.batch()
|
|
|
# The calls return futures to eventually hold results.
|
|
|
foo = batch.foo(one="One", two="Two")
|
|
|
bar = batch.bar("Eins", "Zwei")
|
|
|
# We can call non-batchable proxy methods, but the break the current batch
|
|
|
# request and cause additional roundtrips.
|
|
|
greet = batch.greet(name="John Smith")
|
|
|
# We can also add local methods into the mix, but they break the batch too.
|
|
|
hello = batch.hello()
|
|
|
bar2 = batch.bar(b="Uno", a="Due")
|
|
|
# Only now are all the calls executed in sequence, with as few roundtrips
|
|
|
# as possible.
|
|
|
batch.submit()
|
|
|
# After the call to submit, the futures actually contain values.
|
|
|
print(foo.value)
|
|
|
print(bar.value)
|
|
|
print(greet.value)
|
|
|
print(hello.value)
|
|
|
print(bar2.value)
|
|
|
|
|
|
# local usage
|
|
|
mylocal = localthing()
|
|
|
print()
|
|
|
print("== Local")
|
|
|
use(mylocal)
|
|
|
|
|
|
# demo remoting; mimicks what wireproto and HTTP/SSH do
|
|
|
|
|
|
# shared
|
|
|
|
|
|
def escapearg(plain):
|
|
|
return (plain
|
|
|
.replace(':', '::')
|
|
|
.replace(',', ':,')
|
|
|
.replace(';', ':;')
|
|
|
.replace('=', ':='))
|
|
|
def unescapearg(escaped):
|
|
|
return (escaped
|
|
|
.replace(':=', '=')
|
|
|
.replace(':;', ';')
|
|
|
.replace(':,', ',')
|
|
|
.replace('::', ':'))
|
|
|
|
|
|
# server side
|
|
|
|
|
|
# equivalent of wireproto's global functions
|
|
|
class server(object):
|
|
|
def __init__(self, local):
|
|
|
self.local = local
|
|
|
def _call(self, name, args):
|
|
|
args = dict(arg.split('=', 1) for arg in args)
|
|
|
return getattr(self, name)(**args)
|
|
|
def perform(self, req):
|
|
|
print("REQ:", req)
|
|
|
name, args = req.split('?', 1)
|
|
|
args = args.split('&')
|
|
|
vals = dict(arg.split('=', 1) for arg in args)
|
|
|
res = getattr(self, name)(**vals)
|
|
|
print(" ->", res)
|
|
|
return res
|
|
|
def batch(self, cmds):
|
|
|
res = []
|
|
|
for pair in cmds.split(';'):
|
|
|
name, args = pair.split(':', 1)
|
|
|
vals = {}
|
|
|
for a in args.split(','):
|
|
|
if a:
|
|
|
n, v = a.split('=')
|
|
|
vals[n] = unescapearg(v)
|
|
|
res.append(escapearg(getattr(self, name)(**vals)))
|
|
|
return ';'.join(res)
|
|
|
def foo(self, one, two):
|
|
|
return mangle(self.local.foo(unmangle(one), unmangle(two)))
|
|
|
def bar(self, b, a):
|
|
|
return mangle(self.local.bar(unmangle(b), unmangle(a)))
|
|
|
def greet(self, name):
|
|
|
return mangle(self.local.greet(unmangle(name)))
|
|
|
myserver = server(mylocal)
|
|
|
|
|
|
# local side
|
|
|
|
|
|
# equivalent of wireproto.encode/decodelist, that is, type-specific marshalling
|
|
|
# here we just transform the strings a bit to check we're properly en-/decoding
|
|
|
def mangle(s):
|
|
|
return ''.join(chr(ord(c) + 1) for c in s)
|
|
|
def unmangle(s):
|
|
|
return ''.join(chr(ord(c) - 1) for c in s)
|
|
|
|
|
|
# equivalent of wireproto.wirerepository and something like http's wire format
|
|
|
class remotething(thing):
|
|
|
def __init__(self, server):
|
|
|
self.server = server
|
|
|
def _submitone(self, name, args):
|
|
|
req = name + '?' + '&'.join(['%s=%s' % (n, v) for n, v in args])
|
|
|
return self.server.perform(req)
|
|
|
def _submitbatch(self, cmds):
|
|
|
req = []
|
|
|
for name, args in cmds:
|
|
|
args = ','.join(n + '=' + escapearg(v) for n, v in args)
|
|
|
req.append(name + ':' + args)
|
|
|
req = ';'.join(req)
|
|
|
res = self._submitone('batch', [('cmds', req,)])
|
|
|
return res.split(';')
|
|
|
|
|
|
def batch(self):
|
|
|
return wireproto.remotebatch(self)
|
|
|
|
|
|
@peer.batchable
|
|
|
def foo(self, one, two=None):
|
|
|
encargs = [('one', mangle(one),), ('two', mangle(two),)]
|
|
|
encresref = peer.future()
|
|
|
yield encargs, encresref
|
|
|
yield unmangle(encresref.value)
|
|
|
|
|
|
@peer.batchable
|
|
|
def bar(self, b, a):
|
|
|
encresref = peer.future()
|
|
|
yield [('b', mangle(b),), ('a', mangle(a),)], encresref
|
|
|
yield unmangle(encresref.value)
|
|
|
|
|
|
# greet is coded directly. It therefore does not support batching. If it
|
|
|
# does appear in a batch, the batch is split around greet, and the call to
|
|
|
# greet is done in its own roundtrip.
|
|
|
def greet(self, name=None):
|
|
|
return unmangle(self._submitone('greet', [('name', mangle(name),)]))
|
|
|
|
|
|
# demo remote usage
|
|
|
|
|
|
myproxy = remotething(myserver)
|
|
|
print()
|
|
|
print("== Remote")
|
|
|
use(myproxy)
|
|
|
|