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Metadata-Version: 1.1
Name: kazoo
Version: 2.2.1.dev0
Summary: Higher Level Zookeeper Client
Home-page: https://kazoo.readthedocs.org
Author: Kazoo team
Author-email: python-zk@googlegroups.com
License: Apache 2.0
Description: =====
        Kazoo
        =====
        
        .. image:: https://travis-ci.org/python-zk/kazoo.svg?branch=master
            :target: https://travis-ci.org/python-zk/kazoo
            :alt: Travis Build
        
        .. image:: https://img.shields.io/pypi/v/kazoo.svg
            :target: https://pypi.python.org/pypi/kazoo/
            :alt: Latest Version
        
        .. image:: https://img.shields.io/pypi/dm/kazoo.svg
            :target: https://pypi.python.org/pypi/kazoo/
            :alt: Downloads
        
        ``kazoo`` implements a higher level API to `Apache Zookeeper`_ for Python
        clients.
        
        See `the full docs`_ for more information.
        
        License
        =======
        
        ``kazoo`` is offered under the Apache License 2.0.
        
        Authors
        =======
        
        ``kazoo`` started under the `Nimbus Project`_ and through collaboration with
        the open-source community has been merged with code from `Mozilla`_ and the
        `Zope Corporation`_. It has since gathered an active community of over two
        dozen contributors.
        
        .. _Apache Zookeeper: http://zookeeper.apache.org/
        .. _the full docs: http://kazoo.rtfd.org/
        .. _Nimbus Project: http://www.nimbusproject.org/
        .. _Zope Corporation: http://zope.com/
        .. _Mozilla: http://www.mozilla.org/
        
        
        Changelog
        =========
        
        2.2.1 (2015-06-17)
        ------------------
        
        Features
        ********
        
        Bug Handling
        ************
        - handle NameError with basestring on py3k.
        
        Documentation
        *************
        
        2.2 (2015-06-15)
        ----------------
        
        Documentation
        *************
        
        Features
        ********
        
        -  Issue #234: Add support for reconfig cluster membership operation
        
        Bug Handling
        ************
        
        - #315: multiple acquires of a kazoo lock using the lock recipe would
          block when using `acquire` even when non-blocking is specified (only
          when the lock was/has been already acquired).
        - #318: At exit register takes ``*args`` and ``**kwargs`` not args and kargs
        
        Documentation
        *************
        
        2.1 (2015-05-11)
        ----------------
        
        Features
        ********
        
        - Start running tests against Zookeeper 3.5.0 alpha and explicitly configure
          the `admin.serverPort` in tests to avoid port conflicts. The Zookeeper
          alpha version is not yet officially supported.
        - Integrate eventlet *handler* support into kazoo so that along with [gevent,
          threading] handlers there can now be a dedicated eventlet handler for
          projects that need to (or want to) use eventlet (such as those working
          in the openstack community). The ``requirements_eventlet.txt`` file lists
          the optional eventlet requirement(s) that needs to be satisfied when this
          new handler is used.
        - Use ``six`` to nicely handle the cross compatibility of kazoo with
          python 2.x and 3.x (reducing/removing the need to have custom compatibility
          code that replicates what six already provides).
        - Add ``state_change_event`` to ``kazoo.recipe.partitioner.SetPartitioner``
          which is set on every state change.
        - Add a NonBlockingLease recipe.  The recipe allows e.g. cron jobs scheduled
          on multiple machines to ensure that at most N instances will run a particular
          job, with lease timeout for graceful handover in case of node failures.
        
        
        Bug Handling
        ************
        
        - #291: Kazoo lock recipe was only partially re-entrant in that multiple
          calls to `acquire` would obtain the the lock but the first call to `release`
          would remove the underlying lock. This would leave the X - 1 other `acquire`
          statements unprotected (and no longer holding there expected lock). To fix
          this the comment about that lock recipe being re-entrant has been removed
          and multiple acquires will now block when attempted.
        
        - #78: Kazoo now uses socketpairs instead of pipes making it compatible with
          Windows.
        
        - #144, #221: Let `client.command` work with IPv6 addresses.
        
        - #216: Fixed timeout for ConnectionHandler._invoke.
        
        - #261: Creating a sequential znode under / doesn't work.
        
        - #274: Add server_version() retries (by default 4 attempts will be made) to
          better handle flakey responses.
        
        - #271: Fixed handling of KazooState.SUSPENDED in SetPartitioner.
        
        - #283: Fixed a race condition in SetPartitioner when party changes during
          handling of lock acquisition.
        
        - #303: don't crash on random input as the hosts string.
        
        Documentation
        *************
        
        - #222: Document that committed on the transaction is used to ensure only one
          commit and is not an indicator of whether operations in the transaction
          returned desired results.
        
        2.0 (2014-06-19)
        ----------------
        
        Documentation
        *************
        
        - Extend support to Python 3.4, deprecating Python 3.2.
        - Issue #198: Mention Zake as a sophisticated kazoo mock testing library.
        - Issue #181: Add documentation on basic logging setup.
        
        
        2.0b1 (2014-04-24)
        ------------------
        
        API Changes
        ***********
        
        - Null or None data is no longer treated as "". Pull req #165, patch by
          Raul Gutierrez S. This will affect how you should treat null data in a
          znode vs. an empty string.
        - Passing acl=[] to create() now works properly instead of an InvalidACLError
          as it returned before. Patch by Raul Gutierrez S in PR #164.
        - Removed the dependency on zope.interface. The classes in the interfaces
          module are left for documentation purposes only (issue #131).
        
        Features
        ********
        
        - Logging levels have been reduced.
        
          - Logging previously at the ``logging.DEBUG`` level is now logged at
            the ``kazoo.loggingsupport.BLATHER`` level (5).
        
          - Some low-level logging previously at the ``logging.INFO`` level is
            now logged at the ``logging.DEBUG`` level.
        
        - Issue #133: Introduce a new environment variable `ZOOKEEPER_PORT_OFFSET`
          for the testing support, to run the testing cluster on a different range.
        
        Bug Handling
        ************
        
        - When authenticating via add_auth() the auth data will be saved to ensure that
          the authentication happens on reconnect (as is the case when feeding auth
          data via KazooClient's constructor). PR #172, patch by Raul Gutierrez S.
        - Change gevent import to remove deprecation warning when newer gevent is
          used. PR #191, patch by Hiroaki Kawai.
        - Lock recipe was failing to use the client's sleep_func causing issues with
          gevent. Issue #150.
        - Calling a DataWatch or ChildrenWatch instance twice (decorator) now throws
          an exception as only a single function can be associated with a single
          watcher. Issue #154.
        - Another fix for atexit handling so that when disposing of connections the
          atexit handler is removed. PR #190, patch by Devaev Maxim.
        - Fix atexit handling for kazoo threading handler, PR #183. Patch by
          Brian Wickman.
        - Partitioner should handle a suspended connection properly and restore
          an allocated state if it was allocated previously. Patch by Manish Tomar.
        - Issue #167: Closing a client that was never started throws a type error.
          Patch by Joshua Harlow.
        - Passing dictionaries to KazooClient.__init__() wasn't actually working
          properly. Patch by Ryan Uber.
        - Issue #119: Handler timeout takes the max of the random interval or
          the read timeout to ensure a negative number isn't used for the read
          timeout.
        - Fix ordering of exception catches in lock.acquire as it was capturing a
          parent exception before the child. Patch by ReneSac.
        - Fix issue with client.stop() not always setting the client state to
          KeeperState.CLOSED. Patch by Jyrki Pulliainen in PR #174.
        - Issue #169: Fixed pipes leaking into child processes.
        
        Documentation
        *************
        
        - Add section on contributing recipes, add maintainer/status information for
          existing recipes.
        - Add note about alternate use of DataWatch.
        
        1.3.1 (2013-09-25)
        ------------------
        
        Bug Handling
        ************
        
        - #118, #125, #128: Fix unknown variable in KazooClient `command_retry`
          argument handling.
        
        - #126: Fix `KazooRetry.copy` to correctly copy sleep function.
        
        - #118: Correct session/socket timeout conversion (int vs. float).
        
        Documentation
        *************
        
        - #121: Add a note about `kazoo.recipe.queue.LockingQueue` requiring a
          Zookeeper 3.4+ server.
        
        
        1.3 (2013-09-05)
        ----------------
        
        Features
        ********
        
        - #115: Limit the backends we use for SLF4J during tests.
        
        - #112: Add IPv6 support. Patch by Dan Kruchinin.
        
        1.2.1 (2013-08-01)
        ------------------
        
        Bug Handling
        ************
        
        - Issue #108: Circular import fail when importing kazoo.recipe.watchers
          directly has now been resolved. Watchers and partitioner properly import
          the KazooState from kazoo.protocol.states rather than kazoo.client.
        - Issue #109: Partials not usable properly as a datawatch call can now be
          used. All funcs will be called with 3 args and fall back to 2 args if
          there's an argument error.
        - Issue #106, #107: `client.create_async` didn't strip change root from the
          returned path.
        
        1.2 (2013-07-24)
        ----------------
        
        Features
        ********
        
        - KazooClient can now be stopped more reliably even if its in the middle
          of a long retry sleep. This utilizes the new interrupt feature of
          KazooRetry which lets the sleep be broken down into chunks and an
          interrupt function called to determine if the retry should fail early.
        
        - Issue #62, #92, #89, #101, #102: Allow KazooRetry to have a
          max deadline, transition properly when connection fails to LOST, and
          setup separate connection retry behavior from client command retry
          behavior. Patches by Mike Lundy.
        
        - Issue #100: Make it easier to see exception context in threading and
          connection modules.
        
        - Issue #85: Increase information density of logs and don't prevent
          dynamic reconfiguration of log levels at runtime.
        
        - Data-watchers for the same node are no longer 'stacked'. That is, if
          a get and an exists call occur for the same node with the same watch
          function, then it will be registered only once. This change results in
          Kazoo behaving per Zookeeper client spec regarding repeat watch use.
        
        Bug Handling
        ************
        
        - Issue #53: Throw a warning upon starting if the chroot path doesn't exist
          so that it's more obvious when the chroot should be created before
          performing more operations.
        
        - Kazoo previously would let the same function be registered as a data-watch
          or child-watch multiple times, and then call it multiple times upon being
          triggered. This was non-compliant Zookeeper client behavior, the same
          watch can now only be registered once for the same znode path per Zookeeper
          client documentation.
        
        - Issue #105: Avoid rare import lock problems by moving module imports in
          client.py to the module scope.
        
        - Issue #103: Allow prefix-less sequential znodes.
        
        - Issue #98: Extend testing ZK harness to work with different file locations
          on some versions of Debian/Ubuntu.
        
        - Issue #97: Update some docstrings to reflect current state of handlers.
        
        - Issue #62, #92, #89, #101, #102: Allow KazooRetry to have a
          max deadline, transition properly when connection fails to LOST, and
          setup separate connection retry behavior from client command retry
          behavior. Patches by Mike Lundy.
        
        API Changes
        ***********
        
        - The `kazoo.testing.harness.KazooTestHarness` class directly inherits from
          `unittest.TestCase` and you need to ensure to call its `__init__` method.
        
        - DataWatch no longer takes any parameters besides for the optional function
          during instantiation. The additional options are now implicitly True, with
          the user being left to ignore events as they choose. See the DataWatch
          API docs for more information.
        
        - Issue #99: Better exception raised when the writer fails to close. A
          WriterNotClosedException that inherits from KazooException is now raised
          when the writer fails to close in time.
        
        1.1 (2013-06-08)
        ----------------
        
        Features
        ********
        
        - Issue #93: Add timeout option to lock/semaphore acquire methods.
        
        - Issue #79 / #90: Add ability to pass the WatchedEvent to DataWatch and
          ChildWatch functions.
        
        - Respect large client timeout values when closing the connection.
        
        - Add a `max_leases` consistency check to the semaphore recipe.
        
        - Issue #76: Extend testing helpers to allow customization of the Java
          classpath by specifying the new `ZOOKEEPER_CLASSPATH` environment variable.
        
        - Issue #65: Allow non-blocking semaphore acquisition.
        
        Bug Handling
        ************
        
        - Issue #96: Provide Windows compatibility in testing harness.
        
        - Issue #95: Handle errors deserializing connection response.
        
        - Issue #94: Clean up stray bytes in connection pipe.
        
        - Issue #87 / #88: Allow re-acquiring lock after cancel.
        
        - Issue #77: Use timeout in initial socket connection.
        
        - Issue #69: Only ensure path once in lock and semaphore recipes.
        
        - Issue #68: Closing the connection causes exceptions to be raised by watchers
          which assume the connection won't be closed when running commands.
        
        - Issue #66: Require ping reply before sending another ping, otherwise the
          connection will be considered dead and a ConnectionDropped will be raised
          to trigger a reconnect.
        
        - Issue #63: Watchers weren't reset on lost connection.
        
        - Issue #58: DataWatcher failed to re-register for changes after non-existent
          node was created then deleted.
        
        API Changes
        ***********
        
        - KazooClient.create_async now supports the makepath argument.
        
        - KazooClient.ensure_path now has an async version, ensure_path_async.
        
        1.0 (2013-03-26)
        ----------------
        
        Features
        ********
        
        - Added a LockingQueue recipe. The queue first locks an item and removes it
          from the queue only after the consume() method is called. This enables other
          nodes to retake the item if an error occurs on the first node.
        
        Bug Handling
        ************
        
        - Issue #50: Avoid problems with sleep function in mixed gevent/threading
          setup.
        
        - Issue #56: Avoid issues with watch callbacks evaluating to false.
        
        1.0b1 (2013-02-24)
        ------------------
        
        Features
        ********
        
        - Refactored the internal connection handler to use a single thread. It now
          uses a deque and pipe to signal the ZK thread that there's a new command to
          send, so that the ZK thread can send it, or retrieve a response.
          Processing ZK requests and responses serially in a single thread eliminates
          the need for a bunch of the locking, the peekable queue and two threads
          working on the same underlying socket.
        
        - Issue #48: Added documentation for the `retry` helper module.
        
        - Issue #55: Fix `os.pipe` file descriptor leak and introduce a
          `KazooClient.close` method. The method is particular useful in tests, where
          multiple KazooClients are created and closed in the same process.
        
        Bug Handling
        ************
        
        - Issue #46: Avoid TypeError in GeneratorContextManager on process shutdown.
        
        - Issue #43: Let DataWatch return node data if allow_missing_node is used.
        
        0.9 (2013-01-07)
        ----------------
        
        API Changes
        ***********
        
        - When a retry operation ultimately fails, it now raises a
          `kazoo.retry.RetryFailedError` exception, instead of a general `Exception`
          instance. `RetryFailedError` also inherits from the base `KazooException`.
        
        Features
        ********
        
        - Improvements to Debian packaging rules.
        
        Bug Handling
        ************
        
        - Issue #39 / #41: Handle connection dropped errors during session writes.
          Ensure client connection is re-established to a new ZK node if available.
        
        - Issue #38: Set `CLOEXEC` flag on all sockets when available.
        
        - Issue #37 / #40: Handle timeout errors during `select` calls on sockets.
        
        - Issue #36: Correctly set `ConnectionHandler.writer_stopped` even if an
          exception is raised inside the writer, like a retry operation failing.
        
        0.8 (2012-10-26)
        ----------------
        
        API Changes
        ***********
        
        - The `KazooClient.__init__` took as `watcher` argument as its second keyword
          argument. The argument had no effect anymore since version 0.5 and was
          removed.
        
        Bug Handling
        ************
        
        - Issue #35: `KazooClient.__init__` didn't pass on `retry_max_delay` to the
          retry helper.
        
        - Issue #34: Be more careful while handling socket connection errors.
        
        0.7 (2012-10-15)
        ----------------
        
        Features
        ********
        
        - DataWatch now has a `allow_missing_node` setting that allows a watch to be
          set on a node that doesn't exist when the DataWatch is created.
        - Add new Queue recipe, with optional priority support.
        - Add new Counter recipe.
        - Added debian packaging rules.
        
        Bug Handling
        ************
        
        - Issue #31 fixed: Only catch KazooExceptions in catch-all calls.
        - Issue #15 fixed again: Force sleep delay to be a float to appease gevent.
        - Issue #29 fixed: DataWatch and ChildrenWatch properly re-register their
          watches on server disconnect.
        
        0.6 (2012-09-27)
        ----------------
        
        API Changes
        ***********
        
        - Node paths are assumed to be Unicode objects. Under Python 2 pure-ascii
          strings will also be accepted. Node values are considered bytes. The byte
          type is an alias for `str` under Python 2.
        - New KeeperState.CONNECTED_RO state for Zookeeper servers connected in
          read-only mode.
        - New NotReadOnlyCallError exception when issuing a write change against a
          server thats currently read-only.
        
        Features
        ********
        
        - Add support for Python 3.2, 3.3 and PyPy (only for the threading handler).
        - Handles connecting to Zookeeper 3.4+ read-only servers.
        - Automatic background scanning for a Read/Write server when connected to a
          server in read-only mode.
        - Add new Semaphore recipe.
        - Add a new `retry_max_delay` argument to the client and by default limit the
          retry delay to at most an hour regardless of exponential backoff settings.
        - Add new `randomize_hosts` argument to `KazooClient`, allowing one to disable
          host randomization.
        
        Bug Handling
        ************
        
        - Fix bug with locks not handling intermediary lock contenders disappearing.
        - Fix bug with set_data type check failing to catch unicode values.
        - Fix bug with gevent 0.13.x backport of peekable queue.
        - Fix PatientChildrenWatch to use handler specific sleep function.
        
        0.5 (2012-09-06)
        ----------------
        
        Skipping a version to reflect the magnitude of the change. Kazoo is now a pure
        Python client with no C bindings. This release should run without a problem
        on alternate Python implementations such as PyPy and Jython. Porting to Python
        3 in the future should also be much easier.
        
        Documentation
        *************
        
        - Docs have been restructured to handle the new classes and locations of the
          methods from the pure Python refactor.
        
        Bug Handling
        ************
        
        This change may introduce new bugs, however there is no longer the possibility
        of a complete Python segfault due to errors in the C library and/or the C
        binding.
        
        - Possible segfaults from the C lib are gone.
        - Password mangling due to the C lib is gone.
        - The party recipes didn't set their participating flag to False after
          leaving.
        
        Features
        ********
        
        - New `client.command` and `client.server_version` API, exposing Zookeeper's
          four letter commands and giving access to structured version information.
        - Added 'include_data' option for get_children to include the node's Stat
          object.
        - Substantial increase in logging data with debug mode. All correspondence with
          the Zookeeper server can now be seen to help in debugging.
        
        API Changes
        ***********
        
        - The testing helpers have been moved from `testing.__init__` into a
          `testing.harness` module. The official API's of `KazooTestCase` and
          `KazooTestHarness` can still be directly imported from `testing`.
        - The kazoo.handlers.util module was removed.
        - Backwards compatible exception class aliases are provided for now in kazoo
          exceptions for the prior C exception names.
        - Unicode strings now work fine for node names and are properly converted to
          and from unicode objects.
        - The data value argument for the create and create_async methods of the
          client was made optional and defaults to an empty byte string. The data
          value must be a byte string. Unicode values are no longer allowed and
          will raise a TypeError.
        
        
        0.3 (2012-08-23)
        ----------------
        
        API Changes
        ***********
        
        - Handler interface now has an rlock_object for use by recipes.
        
        Bug Handling
        ************
        
        - Fixed password bug with updated zc-zookeeper-static release, which retains
          null bytes in the password properly.
        - Fixed reconnect hammering, so that the reconnection follows retry jitter and
          retry backoff's.
        - Fixed possible bug with using a threading.Condition in the set partitioner.
          Set partitioner uses new rlock_object handler API to get an appropriate RLock
          for gevent.
        - Issue #17 fixed: Wrap timeout exceptions with staticmethod so they can be
          used directly as intended. Patch by Bob Van Zant.
        - Fixed bug with client reconnection looping indefinitely using an expired
          session id.
        
        0.2 (2012-08-12)
        ----------------
        
        Documentation
        *************
        
        - Fixed doc references to start_async using an AsyncResult object, it uses
          an Event object.
        
        Bug Handling
        ************
        
        - Issue #16 fixed: gevent zookeeper logging failed to handle a monkey patched
          logging setup. Logging is now setup such that a greenlet is used for logging
          messages under gevent, and the thread one is used otherwise.
        - Fixed bug similar to #14 for ChildrenWatch on the session listener.
        - Issue #14 fixed: DataWatch had inconsistent handling of the node it was
          watching not existing. DataWatch also properly spawns its _get_data function
          to avoid blocking session events.
        - Issue #15 fixed: sleep_func for SequentialGeventHandler was not set on the
          class appropriately leading to additional arguments being passed to
          gevent.sleep.
        - Issue #9 fixed: Threads/greenlets didn't gracefully shut down. Handler now
          has a start/stop that is used by the client when calling start and stop that
          shuts down the handler workers. This addresses errors and warnings that could
          be emitted upon process shutdown regarding a clean exit of the workers.
        - Issue #12 fixed: gevent 0.13 doesn't use the same start_new_thread as gevent
          1.0 which resulted in a fully monkey-patched environment halting due to the
          wrong thread. Updated to use the older kazoo method of getting the real thread
          module object.
        
        API Changes
        ***********
        
        - The KazooClient handler is now officially exposed as KazooClient.handler
          so that the appropriate sync objects can be used by end-users.
        - Refactored ChildrenWatcher used by SetPartitioner into a publicly exposed
          PatientChildrenWatch under recipe.watchers.
        
        Deprecations
        ************
        
        - connect/connect_async has been renamed to start/start_async to better match
          the stop to indicate connection handling. The prior names are aliased for
          the time being.
        
        Recipes
        *******
        
        - Added Barrier and DoubleBarrier implementation.
        
        0.2b1 (2012-07-27)
        ------------------
        
        Bug Handling
        ************
        
        - ZOOKEEPER-1318: SystemError is caught and rethrown as the proper invalid
          state exception in older zookeeper python bindings where this issue is still
          valid.
        - ZOOKEEPER-1431: Install the latest zc-zookeeper-static library or use the
          packaged ubuntu one for ubuntu 12.04 or later.
        - ZOOKEEPER-553: State handling isn't checked via this method, we track it in
          a simpler manner with the watcher to ensure we know the right state.
        
        Features
        ********
        
        - Exponential backoff with jitter for retrying commands.
        - Gevent 0.13 and 1.0b support.
        - Lock, Party, SetPartitioner, and Election recipe implementations.
        - Data and Children watching API's.
        - State transition handling with listener registering to handle session state
          changes (choose to fatal the app on session expiration, etc.)
        - Zookeeper logging stream redirected into Python logging channel under the
          name 'Zookeeper'.
        - Base client library with handler support for threading and gevent async
          environments.
        
Keywords: zookeeper lock leader configuration
Platform: UNKNOWN
Classifier: Development Status :: 5 - Production/Stable
Classifier: License :: OSI Approved :: Apache Software License
Classifier: Intended Audience :: Developers
Classifier: Operating System :: OS Independent
Classifier: Programming Language :: Python
Classifier: Programming Language :: Python :: 2
Classifier: Programming Language :: Python :: 2.6
Classifier: Programming Language :: Python :: 2.7
Classifier: Programming Language :: Python :: 3
Classifier: Programming Language :: Python :: 3.3
Classifier: Programming Language :: Python :: 3.4
Classifier: Programming Language :: Python :: Implementation :: CPython
Classifier: Programming Language :: Python :: Implementation :: PyPy
Classifier: Topic :: Communications
Classifier: Topic :: System :: Distributed Computing
Classifier: Topic :: System :: Networking