de-Service-ify Helper, pass in storage_broker and secret_holder directly.

This makes it more obvious that the Helper currently generates leases with
the Helper's own secrets, rather than getting values from the client, which
is arguably a bug that will likely be resolved with the Accounting project.

src/allmydata/client.py

@@ -111,6 +111,7 @@ class Client(node.Node, pollmixin.PollMixin):
         self.init_lease_secret()
         self.init_storage()
         self.init_control()
+        self.helper = None
         if self.get_config("helper", "enabled", False, boolean=True):
             self.init_helper()
         self._key_generator = KeyGenerator()
@@ -345,9 +346,9 @@ class Client(node.Node, pollmixin.PollMixin):
     def init_helper(self):
         d = self.when_tub_ready()
         def _publish(self):
-            h = Helper(os.path.join(self.basedir, "helper"),
-                       self.stats_provider, self.history)
-            h.setServiceParent(self)
+            self.helper = Helper(os.path.join(self.basedir, "helper"),
+                                 self.storage_broker, self._secret_holder,
+                                 self.stats_provider, self.history)
             # TODO: this is confusing. BASEDIR/private/helper.furl is created
             # by the helper. BASEDIR/helper.furl is consumed by the client
             # who wants to use the helper. I like having the filename be the
@@ -355,7 +356,7 @@ class Client(node.Node, pollmixin.PollMixin):
             # between config inputs and generated outputs is hard to see.
             helper_furlfile = os.path.join(self.basedir,
                                            "private", "helper.furl")
-            self.tub.registerReference(h, furlFile=helper_furlfile)
+            self.tub.registerReference(self.helper, furlFile=helper_furlfile)
         d.addCallback(_publish)
         d.addErrback(log.err, facility="tahoe.init",
                      level=log.BAD, umid="K0mW5w")

src/allmydata/immutable/offloaded.py

@@ -1,7 +1,6 @@
 
 import os, stat, time, weakref
 from zope.interface import implements
-from twisted.application import service
 from twisted.internet import defer
 from foolscap.api import Referenceable, DeadReferenceError, eventually
 import allmydata # for __full_version__
@@ -135,7 +134,8 @@ class CHKUploadHelper(Referenceable, upload.CHKUploader):
                 "application-version": str(allmydata.__full_version__),
                 }
 
-    def __init__(self, storage_index, helper,
+    def __init__(self, storage_index,
+                 helper, storage_broker, secret_holder,
                  incoming_file, encoding_file,
                  results, log_number):
         self._storage_index = storage_index
@@ -153,9 +153,8 @@ class CHKUploadHelper(Referenceable, upload.CHKUploader):
         self._helper.log("CHKUploadHelper starting for SI %s" % self._upload_id,
                          parent=log_number)
 
-        client = helper.parent
-        self._storage_broker = client.get_storage_broker()
-        self._secret_holder = client._secret_holder
+        self._storage_broker = storage_broker
+        self._secret_holder = secret_holder
         self._fetcher = CHKCiphertextFetcher(self, incoming_file, encoding_file,
                                              self._log_number)
         self._reader = LocalCiphertextReader(self, storage_index, encoding_file)
@@ -479,7 +478,7 @@ class LocalCiphertextReader(AskUntilSuccessMixin):
 
 
 
-class Helper(Referenceable, service.MultiService):
+class Helper(Referenceable):
     implements(interfaces.RIHelper, interfaces.IStatsProducer)
     # this is the non-distributed version. When we need to have multiple
     # helpers, this object will become the HelperCoordinator, and will query
@@ -495,8 +494,11 @@ class Helper(Referenceable, service.MultiService):
     chk_upload_helper_class = CHKUploadHelper
     MAX_UPLOAD_STATUSES = 10
 
-    def __init__(self, basedir, stats_provider=None, history=None):
+    def __init__(self, basedir, storage_broker, secret_holder,
+                 stats_provider, history):
         self._basedir = basedir
+        self._storage_broker = storage_broker
+        self._secret_holder = secret_holder
         self._chk_incoming = os.path.join(basedir, "CHK_incoming")
         self._chk_encoding = os.path.join(basedir, "CHK_encoding")
         fileutil.make_dirs(self._chk_incoming)
@@ -514,15 +516,11 @@ class Helper(Referenceable, service.MultiService):
                           "chk_upload_helper.encoded_bytes": 0,
                           }
         self._history = history
-        service.MultiService.__init__(self)
-
-    def setServiceParent(self, parent):
-        service.MultiService.setServiceParent(self, parent)
 
     def log(self, *args, **kwargs):
         if 'facility' not in kwargs:
             kwargs['facility'] = "tahoe.helper"
-        return self.parent.log(*args, **kwargs)
+        return log.msg(*args, **kwargs)
 
     def count(self, key, value=1):
         if self.stats_provider:
@@ -602,6 +600,8 @@ class Helper(Referenceable, service.MultiService):
             else:
                 self.log("creating new upload helper", parent=lp)
                 uh = self.chk_upload_helper_class(storage_index, self,
+                                                  self._storage_broker,
+                                                  self._secret_holder,
                                                   incoming_file, encoding_file,
                                                   r, lp)
                 self._active_uploads[storage_index] = uh
@@ -619,7 +619,7 @@ class Helper(Referenceable, service.MultiService):
         # see if this file is already in the grid
         lp2 = self.log("doing a quick check+UEBfetch",
                        parent=lp, level=log.NOISY)
-        sb = self.parent.get_storage_broker()
+        sb = self._storage_broker
         c = CHKCheckerAndUEBFetcher(sb.get_servers_for_index, storage_index, lp2)
         d = c.check()
         def _checked(res):

src/allmydata/test/test_helper.py

@@ -3,7 +3,6 @@ from twisted.trial import unittest
 from twisted.application import service
 
 from foolscap.api import Tub, fireEventually, flushEventualQueue
-from foolscap.logging import log
 
 from allmydata.storage.server import si_b2a
 from allmydata.storage_client import StorageFarmBroker
@@ -62,15 +61,9 @@ class FakeClient(service.MultiService):
                                    "n": 100,
                                    "max_segment_size": 1*MiB,
                                    }
-    stats_provider = None
-    storage_broker = StorageFarmBroker(None, True)
-    _secret_holder = client.SecretHolder("lease secret")
-    def log(self, *args, **kwargs):
-        return log.msg(*args, **kwargs)
+
     def get_encoding_parameters(self):
         return self.DEFAULT_ENCODING_PARAMETERS
-    def get_storage_broker(self):
-        return self.storage_broker
 
 def flush_but_dont_ignore(res):
     d = flushEventualQueue()
@@ -96,6 +89,8 @@ class AssistedUpload(unittest.TestCase):
     timeout = 240 # It takes longer than 120 seconds on Francois's arm box.
     def setUp(self):
         self.s = FakeClient()
+        self.storage_broker = StorageFarmBroker(None, True)
+        self.secret_holder = client.SecretHolder("lease secret")
         self.s.startService()
 
         self.tub = t = Tub()
@@ -108,9 +103,11 @@ class AssistedUpload(unittest.TestCase):
 
     def setUpHelper(self, basedir):
         fileutil.make_dirs(basedir)
-        self.helper = h = offloaded.Helper(basedir)
+        self.helper = h = offloaded.Helper(basedir,
+                                           self.storage_broker,
+                                           self.secret_holder,
+                                           None, None)
         h.chk_upload_helper_class = CHKUploadHelper_fake
-        h.setServiceParent(self.s)
         self.helper_furl = self.tub.registerReference(h)
 
     def tearDown(self):

src/allmydata/test/test_web.py

@@ -86,6 +86,7 @@ class FakeClient(service.MultiService):
         self.nodemaker = FakeNodeMaker(None, None, None,
                                        self.uploader, None, None,
                                        None, None)
+        self.helper = None
 
     nodeid = "fake_nodeid"
     nickname = "fake_nickname"

src/allmydata/web/root.py

@@ -160,11 +160,7 @@ class Root(rend.Page):
     def child_helper_status(self, ctx):
         # the Helper isn't attached until after the Tub starts, so this child
         # needs to created on each request
-        try:
-            helper = self.client.getServiceNamed("helper")
-        except KeyError:
-            helper = None
-        return status.HelperStatus(helper)
+        return status.HelperStatus(self.client.helper)
 
     child_webform_css = webform.defaultCSS
     child_tahoe_css = nevow_File(resource_filename('allmydata.web', 'tahoe.css'))
@@ -204,12 +200,11 @@ class Root(rend.Page):
         except KeyError:
             ul[T.li["Not running storage server"]]
 
-        try:
-            h = self.client.getServiceNamed("helper")
-            stats = h.get_stats()
+        if self.client.helper:
+            stats = self.client.helper.get_stats()
             active_uploads = stats["chk_upload_helper.active_uploads"]
             ul[T.li["Helper: %d active uploads" % (active_uploads,)]]
-        except KeyError:
+        else:
             ul[T.li["Not running helper"]]
 
         return ctx.tag[ul]