Merge pull request #40 from zopefoundation/asyncio

Asyncio-based ZEO client and server (2)

.travis.yml

@@ -1,15 +1,35 @@
 language: python
 sudo: false
-python:
-    - 2.7
-    - 3.3
-    - 3.4
-    - pypy
+matrix:
+    include:
+        - os: linux
+          python: 2.7
+        - os: linux
+          python: 3.4
+        - os: linux
+          python: 3.5
+        - os: linux
+          python: 3.4
+          env: ZEO_MTACCEPTOR=1
+        - os: linux
+          python: 3.5
+          env: ZEO_MTACCEPTOR=1
+        - os: linux
+          python: 2.7
+          env: ZEO4_SERVER=1
+        - os: linux
+          python: 3.5
+          env: ZEO4_SERVER=1
+        - os: linux
+          python: 3.5
+          env: BUILOUT_OPTIONS=extra=,uvloop
 install:
-    - pip install -U setuptools
-    - python bootstrap.py
-    - bin/buildout
+    - pip install zc.buildout
+    - buildout $BUILOUT_OPTIONS
+cache:
+  directories:
+    - eggs
 script:
-    - bin/test -v1 -j99
+    - bin/test -v1j99
 notifications:
     email: false

CHANGES.rst

@@ -1,9 +1,105 @@
 Changelog
 =========
 
-4.2.0 (unreleased)
+- Added a ``ClientStorage`` ``server-sync`` configuration option and
+  ``server_sync`` constructor argument to force a server round trip at
+  the beginning of transactions to wait for any outstanding
+  invalidations at the start of the transaction to be delivered.
+
+- When creating an ad hoc server, a log file isn't created by
+  default. You must pass a ``log`` option specifying a log file name.
+
+- The ZEO server register method now returns the storage last
+  transaction, allowing the client to avoid an extra round trip during
+  cache verification.
+
+- Client disconnect errors are now transient errors.  When
+  applications retry jobs that raise transient errors, jobs (e.g. web
+  requests) with disconnect errors will be retried. Together with
+  blocking synchronous ZEO server calls for a limited time while
+  disconnected, this change should allow brief disconnections due to
+  server restart to avoid generating client-visible errors (e.g. 500
+  web responses).
+
+- Fixed bugs in using the ZEO 5 client with ZEO 4 servers.
+
+5.0.0a2 (2016-07-30)
+--------------------
+
+- Added the ability to pass credentials when creating client storages.
+
+  This is experimental in that passing credentials will cause
+  connections to an ordinary ZEO server to fail, but it facilitates
+  experimentation with custom ZEO servers. Doing this with custom ZEO
+  clients would have been awkward due to the many levels of
+  composition involved.
+
+  In the future, we expect to support server security plugins that
+  consume credentials for authentication (typically over SSL).
+
+  Note that credentials are opaque to ZEO. They can be any object with
+  a true value.  The client mearly passes them to the server, which
+  will someday pass them to a plugin.
+
+5.0.0a1 (2016-07-21)
+--------------------
+
+- Added a ClientStorage prefetch method to prefetch oids.
+
+  When oids are prefetched, requests are made at once, but the caller
+  doesn't block waiting for the results.  Rather, then the caller
+  later tries to fetch data for one of the object ids, it's either
+  delivered right away from the ZEO cache, if the prefetch for the
+  object id has completed, or the caller blocks until the inflight
+  prefetch completes. (No new request is made.)
+
+- Fixed: SSL clients of servers with signed certs didn't load default
+  certs and were unable to connect.
+
+5.0.0a0 (2016-07-08)
+--------------------
+
+This is a major ZEO revision, which replaces the ZEO network protocol
+implementation.
+
+New features:
+
+- SSL support
+
+- Optional client-side conflict resolution.
+
+- Lots of mostly internal clean ups.
+
+Dropped features:
+
+- The ZEO authentication protocol.
+
+  This will be replaced by new authentication mechanims leveraging SSL.
+
+- The ZEO monitor server.
+
+- Full cache verification.
+
+- Client suppprt for servers older than ZODB 3.9
+
+- Server support for clients older than ZEO 4.2.0
+
+
+
+4.2.0 (2016-06-15)
 ------------------
 
+- Changed loadBefore to operate more like load behaved, especially
+  with regard to the load lock.  This allowes ZEO to work with the
+  upcoming ZODB 5, which used loadbefore rather than load.
+
+  Reimplemented load using loadBefore, thus testing loadBefore
+  extensively via existing tests.
+
+- Other changes to work with ZODB 5 (as well as ZODB 4)
+
+- Fixed: the ZEO cache loadBefore method failed to utilize current data.
+
 - Drop support for Python 2.6 and 3.2.
 
 4.2.0b1 (2015-06-05)