Mercurial > hg
view tests/test-batching.py @ 37283:d4e62df1c73d
debugcommands: drop offset and length from debugindex by default
These fields are an implementation detail of revlog storage. As
such, they are not part of the generic storage "index" interface
and shouldn't be displayed by default.
Because we don't have another way to display these fields, we've
retained support for printing these fields via --verbose.
Yes, I know we should probably be doing all this formatting using
modern formatting/templater APIs. I didn't feel like scope
bloating this patch.
Differential Revision: https://phab.mercurial-scm.org/D3028
author | Gregory Szorc <gregory.szorc@gmail.com> |
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date | Mon, 02 Apr 2018 16:47:53 -0700 |
parents | 4c706037adef |
children | a81d02ea65db |
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# 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 ( error, peer, util, 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 batchiter(self): '''Support for local batching.''' return peer.localiterbatcher(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 proxied methods. batch = it.batchiter() # The calls return futures to eventually hold results. foo = batch.foo(one="One", two="Two") bar = batch.bar("Eins", "Zwei") bar2 = batch.bar(b="Uno", a="Due") # Future shouldn't be set until we submit(). assert isinstance(foo, peer.future) assert not util.safehasattr(foo, 'value') assert not util.safehasattr(bar, 'value') batch.submit() # Call results() to obtain results as a generator. results = batch.results() # Future results shouldn't be set until we consume a value. assert not util.safehasattr(foo, 'value') foovalue = next(results) assert util.safehasattr(foo, 'value') assert foovalue == foo.value print(foo.value) next(results) print(bar.value) next(results) print(bar2.value) # We should be at the end of the results generator. try: next(results) except StopIteration: print('proper end of results generator') else: print('extra emitted element!') # Attempting to call a non-batchable method inside a batch fails. batch = it.batchiter() try: batch.greet(name='John Smith') except error.ProgrammingError as e: print(e) # Attempting to call a local method inside a batch fails. batch = it.batchiter() try: batch.hello() except error.ProgrammingError as e: print(e) # 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,)]) for r in res.split(';'): yield r def batchiter(self): return wireproto.remoteiterbatcher(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)