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We are psyched to announce the release of:

taskflow 0.9.0: Taskflow structured state management library.

For more details, please see the git log history below and:

    http://launchpad.net/taskflow/+milestone/0.9.0

Please report issues through launchpad:

    http://bugs.launchpad.net/taskflow/

Changes in taskflow 0.8.1..0.9.0
--------------------------------

c76ee25 2015-04-18 14:44:24 +0000 Validate correct exception subclass in 'raise_with_cause'
18d3cd1 2015-04-17 21:05:21 -0700 Remove link to kazoo eventlet handler
672e1f4 2015-04-16 16:29:49 -0700 Add states generating venv and use pydot2
50eb387 2015-04-16 12:08:30 -0700 Add strict job state transition checking
0a94d68 2015-04-16 18:15:17 +0000 Uncap library requirements for liberty
018dbf6 2015-04-15 16:10:33 -0700 Have reset state handlers go through a shared list
0eee98d 2015-04-15 15:43:08 -0700 Add job states in docs + states in python
661f3b0 2015-04-12 22:57:28 -0700 Expose r/o listener callback + details filter callback
15d73cb 2015-04-11 10:16:13 -0700 Expose listener notification type + docs
d8e76fd 2015-04-10 20:25:51 -0700 Ensure listener args are always a tuple/immutable
624001a 2015-04-10 17:11:26 -0700 Include the 'dump_memory_backend' example in the docs
8910cdb 2015-04-09 15:02:06 -0700 Make resolution/retry strategies more clear and better
4ef79bc 2015-04-08 16:21:34 -0700 Rename notifier 'listeners' to 'topics'
ee7f07f 2015-04-08 15:28:25 -0700 Mention link to states doc in notify state transitions
0ad2fd9 2015-04-08 15:22:46 -0700 Ensure we don't get stuck in formatting loops
c64ca27 2015-04-08 14:04:38 -0700 Add note about thread safety of fake filesystem
647b69e 2015-04-05 09:46:19 -0700 Have the notification/listener docs match other sections
ebc0782 2015-04-04 19:46:20 -0700 Put semantics preservation section into note block
2ad837c 2015-04-03 17:37:34 -0700 Note that the traditional mode also avoids this truncation issue
7e8981a 2015-04-03 16:11:04 -0700 Avoid going into causes of non-taskflow exceptions
aa8be4b 2015-04-03 16:04:46 -0700 Use the ability to chain exceptions correctly
9cb7181 2015-04-03 17:40:28 +0000 Add a example showing how to share an executor
c553d65 2015-04-02 11:54:42 -0700 Shrink the bookshelf description
17b7c21 2015-04-01 17:12:38 -0700 Remove link about implementing job garbage binning
254d3f9 2015-04-01 14:34:30 -0700 Put the examples/misc/considerations under a new section
f7d81c7 2015-04-01 13:10:49 -0700 Add a suspension engine section
ce7b1d2 2015-03-31 11:43:55 -0700 Allow ls() to list recursively (using breadth-first)
1714cca 2015-03-30 14:55:05 -0700 Turn 'check_who' into a decorator
bb0af4f 2015-03-30 13:05:43 -0700 Use 'node' terminology instead of 'item' terminology
de68bc2 2015-03-29 22:59:04 -0700 Allow providing a node stringify function to tree pformat
f11579b 2015-03-29 22:53:47 -0700 Add in memory filesystem clearing
d33b316 2015-03-29 22:48:42 -0700 Just unify having a single requirements.txt file
30c7c0c 2015-03-25 21:59:27 -0700 Add memory backend get() support

Diffstat (except docs and test files)
-------------------------------------

requirements-py2.txt                               |  36 -----
requirements-py3.txt                               |  30 ----
requirements.txt                                   |  36 +++++
taskflow/engines/action_engine/analyzer.py         |   6 +-
taskflow/engines/action_engine/completer.py        | 131 ++++++++++++----
taskflow/engines/action_engine/runtime.py          |  33 +++--
taskflow/engines/worker_based/protocol.py          |  32 ++--
taskflow/examples/dump_memory_backend.py           |   7 +-
taskflow/examples/share_engine_thread.py           |  81 ++++++++++
taskflow/exceptions.py                             |  16 +-
taskflow/jobs/backends/impl_zookeeper.py           | 164 +++++++++++++--------
taskflow/patterns/graph_flow.py                    |  91 ++++++------
taskflow/persistence/backends/impl_dir.py          |   8 +-
taskflow/persistence/backends/impl_memory.py       |  61 +++++++-
taskflow/persistence/backends/impl_sqlalchemy.py   |  74 ++++++----
taskflow/persistence/backends/impl_zookeeper.py    |  32 ++--
taskflow/states.py                                 |  33 ++++-
.../unit/persistence/test_memory_persistence.py    |  40 +++++
taskflow/types/notifier.py                         |  81 ++++++----
taskflow/types/tree.py                             |  17 ++-
test-requirements.txt                              |   4 +-
tools/generate_states.sh                           |  36 -----
tools/state_graph.py                               |  18 ++-
tools/update_states.sh                             |  40 +++++
tox.ini                                            |  18 ++-
38 files changed, 982 insertions(+), 408 deletions(-)


Requirements updates
--------------------

diff --git a/requirements.txt b/requirements.txt
new file mode 100644
index 0000000..8e0c5f3
--- /dev/null
+++ b/requirements.txt
@@ -0,0 +1,36 @@
+# The order of packages is significant, because pip processes them in the order
+# of appearance. Changing the order has an impact on the overall integration
+# process, which may cause wedges in the gate later.
+
+# See: https://bugs.launchpad.net/pbr/+bug/1384919 for why this is here...
+pbr>=0.6,!=0.7,<1.0
+
+# Packages needed for using this library.
+
+# Only needed on python 2.6
+ordereddict
+
+# Python 2->3 compatibility library.
+six>=1.9.0
+
+# Enum library made for <= python 3.3
+enum34
+
+# Very nice graph library
+networkx>=1.8
+
+# Used for backend storage engine loading.
+stevedore>=1.3.0  # Apache-2.0
+
+# Backport for concurrent.futures which exists in 3.2+
+futures>=2.1.6
+
+# Used for structured input validation
+jsonschema>=2.0.0,<3.0.0
+
+# For common utilities
+oslo.utils>=1.4.0                       # Apache-2.0
+oslo.serialization>=1.4.0               # Apache-2.0
+
+# For deprecation of things
+debtcollector>=0.3.0  # Apache-2.0
diff --git a/test-requirements.txt b/test-requirements.txt
index 23d9ac3..939b2ff 100644
--- a/test-requirements.txt
+++ b/test-requirements.txt
@@ -6 +6 @@ hacking<0.11,>=0.10.0
-oslotest>=1.5.1,<1.6.0  # Apache-2.0
+oslotest>=1.5.1  # Apache-2.0
@@ -33 +33 @@ sphinx>=1.1.2,!=1.2.0,!=1.3b1,<1.3
-oslosphinx>=2.5.0,<2.6.0  # Apache-2.0
+oslosphinx>=2.5.0  # Apache-2.0