gqfdZddlmZddlZddlZddlmZddlmZddlmZddlm Z dd lm Z dd l m Z e j d Z e j d Ze j d ZGddeZGdde jZGddeZ ddZeZGddeZdS)z'Base constructs for connection pools. )dequeN)event)exc) interfaces)log)util) threadingreset_rollback reset_commit reset_nonec*eZdZdZdZdZdZdZdS) _ConnDialectzpartial implementation of :class:`.Dialect` which provides DBAPI connection methods. When a :class:`_pool.Pool` is combined with an :class:`_engine.Engine`, the :class:`_engine.Engine` replaces this with its own :class:`.Dialect`. c.|dSN)rollbackselfdbapi_connections /srv/buildsys-work-dir/castor/build_node/builder-2/WGSG1/unpkd_srcs/cloudlinux-venv-1.0.6/venv/lib/python3.11/site-packages/sqlalchemy/pool/base.py do_rollbackz_ConnDialect.do_rollback)s!!#####c.|dSr)commitrs r do_commitz_ConnDialect.do_commit,s!!!!!rc.|dSr)closers rdo_closez_ConnDialect.do_close/s     rc td)NzJThe ping feature requires that a dialect is passed to the connection pool.NotImplementedErrorrs rdo_pingz_ConnDialect.do_ping2s! -   rN)__name__ __module__ __qualname____doc__rrrr"rrrrsZ$$$"""!!!     rrc&eZdZdZeZejdd dd Ze d Z e j d Z d Z d Z ejdddZdZdZddZdZdZdZdZdZdZdZdS)Poolz)Abstract base class for connection pools.)z1.3zkThe :paramref:`_pool.Pool.use_threadlocal` parameter is deprecated and will be removed in a future release.)0.7z:class:`.PoolListener` is deprecated in favor of the :class:`_events.PoolEvents` listener interface. The :paramref:`_pool.Pool.listeners` parameter will be removed in a future release.)use_threadlocal listenersNFTc 4|r|x|_|_nd|_tj||t j|_||_||_d|_ ||_ | |_ tj |tddgt gdt"dgidd |_||_| r|j| d | r| |_|r|D]\} } t/j|| | |r|D]}||dSdS) a- Construct a Pool. :param creator: a callable function that returns a DB-API connection object. The function will be called with parameters. :param recycle: If set to a value other than -1, number of seconds between connection recycling, which means upon checkout, if this timeout is surpassed the connection will be closed and replaced with a newly opened connection. Defaults to -1. :param logging_name: String identifier which will be used within the "name" field of logging records generated within the "sqlalchemy.pool" logger. Defaults to a hexstring of the object's id. :param echo: if True, the connection pool will log informational output such as when connections are invalidated as well as when connections are recycled to the default log handler, which defaults to ``sys.stdout`` for output.. If set to the string ``"debug"``, the logging will include pool checkouts and checkins. The :paramref:`_pool.Pool.echo` parameter can also be set from the :func:`_sa.create_engine` call by using the :paramref:`_sa.create_engine.echo_pool` parameter. .. seealso:: :ref:`dbengine_logging` - further detail on how to configure logging. :param use_threadlocal: If set to True, repeated calls to :meth:`connect` within the same application thread will be guaranteed to return the same connection object that is already checked out. This is a legacy use case and the flag has no effect when using the pool with a :class:`_engine.Engine` object. :param reset_on_return: Determine steps to take on connections as they are returned to the pool. reset_on_return can have any of these values: * ``"rollback"`` - call rollback() on the connection, to release locks and transaction resources. This is the default value. The vast majority of use cases should leave this value set. * ``True`` - same as 'rollback', this is here for backwards compatibility. * ``"commit"`` - call commit() on the connection, to release locks and transaction resources. A commit here may be desirable for databases that cache query plans if a commit is emitted, such as Microsoft SQL Server. However, this value is more dangerous than 'rollback' because any data changes present on the transaction are committed unconditionally. * ``None`` - don't do anything on the connection. This setting should generally only be made on a database that has no transaction support at all, namely MySQL MyISAM; when used on this backend, performance can be improved as the "rollback" call is still expensive on MySQL. It is **strongly recommended** that this setting not be used for transaction-supporting databases in conjunction with a persistent pool such as :class:`.QueuePool`, as it opens the possibility for connections still in a transaction to be idle in the pool. The setting may be appropriate in the case of :class:`.NullPool` or special circumstances where the connection pool in use is not being used to maintain connection lifecycle. * ``False`` - same as None, this is here for backwards compatibility. :param events: a list of 2-tuples, each of the form ``(callable, target)`` which will be passed to :func:`.event.listen` upon construction. Provided here so that event listeners can be assigned via :func:`_sa.create_engine` before dialect-level listeners are applied. :param listeners: A list of :class:`.PoolListener`-like objects or dictionaries of callables that receive events when DB-API connections are created, checked out and checked in to the pool. :param dialect: a :class:`.Dialect` that will handle the job of calling rollback(), close(), or commit() on DBAPI connections. If omitted, a built-in "stub" dialect is used. Applications that make use of :func:`_sa.create_engine` should not use this parameter as it is handled by the engine creation strategy. .. versionadded:: 1.1 - ``dialect`` is now a public parameter to the :class:`_pool.Pool`. :param pre_ping: if True, the pool will emit a "ping" (typically "SELECT 1", but is dialect-specific) on the connection upon checkout, to test if the connection is alive or not. If not, the connection is transparently re-connected and upon success, all other pooled connections established prior to that timestamp are invalidated. Requires that a dialect is passed as well to interpret the disconnection error. .. versionadded:: 1.2 N)echoflagrrT)noneNFrreset_on_returnF)resolve_symbol_names)only_propagate) logging_name_orig_logging_namerinstance_loggerr local _threadconns_creator_recycle_invalidate_time_use_threadlocal _pre_pingr symbolparse_user_argumentr r r _reset_on_returnechodispatch_update_dialectrlisten add_listener)rcreatorrecyclerAr+r4r1r,eventsdialectpre_ping _dispatchfntargetls r__init__z Pool.__init__?spH  +:F FD  7 7&*D # D40000%O--  ! /! $ ? ? T 2111xj  !&!@ ! !   C M ! !)E ! B B B  $#DM  /$ / / F T62....  % % %!!!$$$$ % % % %rc|jdSNr9)__dict__rs rr9z Pool._creators}Z((rcN||jd<|||_dSrR)rS_should_wrap_creator_invoke_creator)rrGs rr9z Pool._creators*$+ j!#88AArc& tj|jd}n#t$rfdcYSwxYw|ddurt |dpd}t |d|z }|d|dfdgdfkrS|d krSfd S) zlDetect if creator accepts a single argument, or is sent as a legacy style no-arg function. T)no_selfcSrr'crecrGs rz+Pool._should_wrap_creator..  rNrconnection_recordrcSrr'r[s rr]z+Pool._should_wrap_creator..r^r)r get_callable_argspecr9 TypeErrorlen)rrGargspec defaulted positionalss ` rrVzPool._should_wrap_creators  */ tLLLGG * * *)))) ) ) ) *AJd*>s71:C! '!*oo 1  AJ #)<(=w'G G GN A  N*))) )s 11c|jd| |j|dS#t$r!|jd|dYdSwxYw)NzClosing connection %rzException closing connection %rTexc_info)loggerdebugrDr Exceptionerror)r connections r_close_connectionzPool._close_connection s 1:>>>  M " ": . . . . .    K  1:        s9'A$#A$r*zThe :meth:`_pool.Pool.add_listener` method is deprecated and will be removed in a future release. Please use the :class:`_events.PoolEvents` listener interface.cFtj||dS)aAdd a :class:`.PoolListener`-like object to this pool. ``listener`` may be an object that implements some or all of PoolListener, or a dictionary of callables containing implementations of some or all of the named methods in PoolListener. N)r PoolListener_adapt_listener)rlisteners rrFzPool.add_listeners# //h?????rc6t|S)aProduce a DBAPI connection that is not referenced by any thread-local context. This method is equivalent to :meth:`_pool.Pool.connect` when the :paramref:`_pool.Pool.use_threadlocal` flag is not set to True. When :paramref:`_pool.Pool.use_threadlocal` is True, the :meth:`_pool.Pool.unique_connection` method provides a means of bypassing the threadlocal context. )_ConnectionFairy _checkoutrTs runique_connectionzPool.unique_connection$s ))$///rc t|S)z6Called by subclasses to create a new ConnectionRecord.)_ConnectionRecordrTs r_create_connectionzPool._create_connection2s!&&&rct|dd}|r|j|jkrtj|_|r(t|ddr||dSdSdS)aMark all connections established within the generation of the given connection as invalidated. If this pool's last invalidate time is before when the given connection was created, update the timestamp til now. Otherwise, no action is performed. Connections with a start time prior to this pool's invalidation time will be recycled upon next checkout. _connection_recordNis_validF)getattrr; starttimetime invalidate)rrp exception_checkinrecs r _invalidatezPool._invalidate7sj"6== 0d+cm;;$(IKKD !  - J>> -  ! !) , , , , , - - - -rct)a"Return a new :class:`_pool.Pool`, of the same class as this one and configured with identical creation arguments. This method is used in conjunction with :meth:`dispose` to close out an entire :class:`_pool.Pool` and create a new one in its place. r rTs rrecreatez Pool.recreateHs"###rct)zDispose of this pool. This method leaves the possibility of checked-out connections remaining open, as it only affects connections that are idle in the pool. .. seealso:: :meth:`Pool.recreate` r rTs rdisposez Pool.disposeTs"###rc|jst|S |j}||Sn#t $rYnwxYwt||jS)zReturn a DBAPI connection from the pool. The connection is instrumented such that when its ``close()`` method is called, the connection will be returned to the pool. )r<rwrxr8current_checkout_existingAttributeErrorrrs rconnectz Pool.connectcs$ 4#--d33 3 0#++--C--///    D   ))$0ABBBsA A A cp|jr |j`n#t$rYnwxYw||dS)zGiven a _ConnectionRecord, return it to the :class:`_pool.Pool`. This method is called when an instrumented DBAPI connection has its ``close()`` method called. N)r<r8rr_do_return_conn)rrecords r _return_connzPool._return_connxsZ    %--!     V$$$$$s  ct)z7Implementation for :meth:`get`, supplied by subclasses.r rTs r_do_getz Pool._do_get"###rct)z?Implementation for :meth:`return_conn`, supplied by subclasses.r )rconns rrzPool._do_return_connrrctrr rTs rstatusz Pool.statuss!###r) r-NFNTNNNFN)NT)r#r$r%r&rrDr deprecated_paramsrPpropertyr9setterrVrq deprecatedrFryr|rrrrrrrrr'rrr)r)9s33|~~HT    " X%X%X%  X%t))X)_BB_B***4T_  : @@  @ 0 0 0''' ----" $ $ $ $ $ $CCC* % % %$$$ $$$ $$$$$rr)ceZdZdZddZdZdZdZ dZe j dZ e j dZ e dZd Zdd Zed Zed ZdZddZdZdZddZdS)r{aInternal object which maintains an individual DBAPI connection referenced by a :class:`_pool.Pool`. The :class:`._ConnectionRecord` object always exists for any particular DBAPI connection whether or not that DBAPI connection has been "checked out". This is in contrast to the :class:`._ConnectionFairy` which is only a public facade to the DBAPI connection while it is checked out. A :class:`._ConnectionRecord` may exist for a span longer than that of a single DBAPI connection. For example, if the :meth:`._ConnectionRecord.invalidate` method is called, the DBAPI connection associated with this :class:`._ConnectionRecord` will be discarded, but the :class:`._ConnectionRecord` may be used again, in which case a new DBAPI connection is produced when the :class:`_pool.Pool` next uses this record. The :class:`._ConnectionRecord` is delivered along with connection pool events, including :meth:`_events.PoolEvents.connect` and :meth:`_events.PoolEvents.checkout`, however :class:`._ConnectionRecord` still remains an internal object whose API and internals may change. .. seealso:: :class:`._ConnectionFairy` Tcj||_|r|dt|_dS)NT)first_connect_check)_ConnectionRecord__pool_ConnectionRecord__connectrfinalize_callback)rpoolrs rrPz_ConnectionRecord.__init__s7  5 NNtN 4 4 4!&rNrciS)a`The ``.info`` dictionary associated with the DBAPI connection. This dictionary is shared among the :attr:`._ConnectionFairy.info` and :attr:`_engine.Connection.info` accessors. .. note:: The lifespan of this dictionary is linked to the DBAPI connection itself, meaning that it is **discarded** each time the DBAPI connection is closed and/or invalidated. The :attr:`._ConnectionRecord.record_info` dictionary remains persistent throughout the lifespan of the :class:`._ConnectionRecord` container. r'rTs rinfoz_ConnectionRecord.infos " rciS)aAn "info' dictionary associated with the connection record itself. Unlike the :attr:`._ConnectionRecord.info` dictionary, which is linked to the lifespan of the DBAPI connection, this dictionary is linked to the lifespan of the :class:`._ConnectionRecord` container itself and will remain persistent throughout the life of the :class:`._ConnectionRecord`. .. versionadded:: 1.1 r'rTs r record_infoz_ConnectionRecord.record_infos  rc }nW#t$rJ}tj5|dddn #1swxYwYYd}~nd}~wwxYwt|}tj |fd_ t rj d||S)Nc8totd|Sr)_finalize_fairy)refrArrs rr]z,_ConnectionRecord.checkout..s"<c4d;;rz#Connection %r checked out from pool)rget_connectionrnr safe_reraise_checkin_failed_should_log_debugrwweakrefr fairy_ref_refsaddrlrm)clsrrerrfairyrArs ` @@rcheckoutz_ConnectionRecord.checkoutsallnn )"1133   ) ) )"$$ ) )##C((( ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) )%%'' !13==  < < < < < <    #   K  57G    s8. BA= A-! A=-A1 1A=4A1 5A==Bc^|||ddS)NeT) _no_fairy_ref)rcheckin)rrs rrz!_ConnectionRecord._checkin_faileds0 # 4 (((((rFcP|j|stjd|zdSd|_|j}|j}|jr+|j}|||j+|jjr|j||| |dS)NzDouble checkin attempted on %s) rr warnrprrpoprBrr)rrrpr finalizers rrz_ConnectionRecord.checkins > !- ! I6= > > > F_ {$ ".2244I Ij ! ! !$ " =  4 M ! !*d 3 3 3 $rc|jduSr)rrTs rin_usez_ConnectionRecord.in_uses~T))rc|jSr)rrTs rlast_connect_timez#_ConnectionRecord.last_connect_times ~rc@|j|dSdSr)rp_ConnectionRecord__closerTs rrz_ConnectionRecord.closes# ? & LLNNNNN ' &rc|jdS|r'|jj|j||n&|jj|j|||7|jjd|rdnd|j|jj|n*|jjd|rdnd|j|rtj |_ dS| d|_dS)aInvalidate the DBAPI connection held by this :class:`._ConnectionRecord`. This method is called for all connection invalidations, including when the :meth:`._ConnectionFairy.invalidate` or :meth:`_engine.Connection.invalidate` methods are called, as well as when any so-called "automatic invalidation" condition occurs. :param e: an exception object indicating a reason for the invalidation. :param soft: if True, the connection isn't closed; instead, this connection will be recycled on next checkout. .. versionadded:: 1.0.3 .. seealso:: :ref:`pool_connection_invalidation` Nz*%sInvalidate connection %r (reason: %s:%s)zSoft z%sInvalidate connection %r) rprrBsoft_invalidaterrlr __class__r#r_soft_invalidate_timerrrsofts rrz_ConnectionRecord.invalidate!s , ? " F  F K 0 0$ J J J J K + +DOT1 E E E = K  # #<'R $      K  # #,'R     #)-D & & & LLNNN"DOOOrcd}|j.|j|n|jjdkrQt j|jz |jjkr(|jjd|jd}nt|jj |jkr(|jjd|jd}n7|j |jkr'|jjd|jd}|rA| |j||jS)NFr-z)Connection %r exceeded timeout; recyclingTz=Connection %r invalidated due to pool invalidation; recyclingzCConnection %r invalidated due to local soft invalidation; recycling) rprclearrrr:rrrlr;rr)rrHs rrz _ConnectionRecord.get_connectionQsO ? " IOO    NN     K 2 % % dn,t{/CCC K  # #;T_   GG [ )DN : : K  # #    GG  '$. 8 8 K  # #    G   LLNNN IOO    NN   rc|j|jjjr%|jj|j||j|jd|_dSr)rrrrBrrprqrTs r__closez_ConnectionRecord.__closesg $$&&& ;  % > K & &t = = = %%do666rcd|j}d|_ tj|_||}|jd|||_|r=|jj |j |j||jj r"|j |j|dSdS#t$rW}tj5|jd|dddn#1swxYwYYd}~dSYd}~dSd}~wwxYw)NzCreated new connection %rzError on connect(): %s)rrprrrWrlrmrB first_connect for_modifyexec_once_unless_exceptionrrnr r)rrrrprs r __connectz_ConnectionRecord.__connects{ =!Y[[DN--d33J K  9: F F F(DO # D +66M,,T_dCCC}$ = %%dot<<<<< = = ? ? ?"$$ ? ? !!":A>>> ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ?s<AC D/D*+D D*D D*D D**D/)T)FNF)r#r$r%r&rPrrrprr memoized_propertyrr classmethodrrrrrrrrrrrr'rrr{r{sW>)))) IIJ $    [*)))     **X*X.#.#.#.#`...`======rr{ct|||j|urdS|J|j}||r|r|jd| |pt |||}|j|usJ|||s;|jj r|j || |na#t$rT}|j dd|r| |t|tsYd}~nd}~wwxYw|r|j|dSdSdS)zfCleanup for a :class:`._ConnectionFairy` whether or not it's already been garbage collected. Nz$Connection %r being returned to poolz!Exception during reset or similarTrjr)rdiscardrrprlrmrw_resetrBclose_detachedrq BaseExceptionror isinstancernr)rpr`rrrArrs rrrs MM#$$$   &c 1 1 F!!!&1     K  6     --tE#z1111 LL   % 3=/=M00<<<&&z222    K  3d    ! 2!,,q,111a++        $.8D!!#####$$DDsA0C D$A DD$ceZdZdZdZdZ dZ dZ eddZ dZ dZ e Z dZ edZed Zejd Zed Zdd ZdZdZdZdZdS)rwabProxies a DBAPI connection and provides return-on-dereference support. This is an internal object used by the :class:`_pool.Pool` implementation to provide context management to a DBAPI connection delivered by that :class:`_pool.Pool`. The name "fairy" is inspired by the fact that the :class:`._ConnectionFairy` object's lifespan is transitory, as it lasts only for the length of a specific DBAPI connection being checked out from the pool, and additionally that as a transparent proxy, it is mostly invisible. .. seealso:: :class:`._ConnectionRecord` c0||_||_||_dSr)rpr~_echo)rrr`rAs rrPz_ConnectionFairy.__init__s*"3 rNc|sCt|}||_d|_|t j||_|jtj d|xjdz c_|j js|j r |jdkr|Sd}|dkr |j r|j r |j d|j|j|j}|s:|j r |j d|jtj|j |j|j||S#tj$r}|jrN|j d||j||||d n;|j d |j||j| |j|_n\#t2$rO}t5j5|j|dddn #1swxYwYYd}~nd}~wwxYw|dz}Yd}~nd}~wwxYw|dk|j d |tj d) NrzThis connection is closedrarzPool pre-ping on connection %sz;Pool pre-ping on connection %s failed, will invalidate poolzoDisconnection detected on checkout, invalidating all pooled connections prior to current timestamp (reason: %r)F)rzVDisconnection detected on checkout, invalidating individual connection %s (reason: %r)z+Reconnection attempts exhausted on checkout)r{r_pool_counterrrrrprInvalidRequestErrorrBr=rrlrmrDr"InvalidatePoolErrorr~DisconnectionErrorinvalidate_poolrrrrrnr rr)rr threadconnsrattemptsresultrrs rrxz_ConnectionFairy._checkoutsu 9%..t44EEKEN&&-k%&8&8 #   #)*EFF F ! & /3~  ^q Lll/ >8{ ))N"]2253CDDF!8 ; K--!7 % 0 "5777 &&$e&> )   $;K$$9  ,77:::$$UA$>>>>K$$M(  ,77:::F0??AA$$!FFF*,,FF0@@EEEFFFFFFFFFFFFFFFFA 5 -lld FGGG %&ABBBshB0E I7BI2-H  I2 I%I )I I I I I I I2 I%%I22I7cDt|j|SN)r)rwrxrrTs rrz#_ConnectionFairy._checkout_existingWs))$*D)AAArctt|j|j|jd|j|d|_d|_dSr)rrpr~rrrTs rrz_ConnectionFairy._checkinZsK O  # J  J     "&rcB|jjr |j||j|jtur|jr*|jd|j|j rdnd|j rW|j j s0tj d|j |dS|j dS|j |dS|jt ur|jr*|jd|j|j rdnd|j rW|j j s0tj d|j |dS|j dS|j |dSdS)Nz"Connection %s rollback-on-return%sz , via agentrzlReset agent is not active. This should not occur unless there was already a connectivity error in progress.z Connection %s commit-on-return%s)rBresetr~r@r rrlrmrp _reset_agent is_activer rrDrrr rr)rrs rrz_ConnectionFairy._reseths =  ? M  d&= > > >  N 2 2z  !!8O%)%6>MMB  0(21I< M--d33333%..00000 ))$/////  "l 2 2z  !!6O%)%6>MMB  .(2/I< M++D11111%,,..... ''-----%3 2rc|jjSr)rrlrTs r_loggerz_ConnectionFairy._loggers z  rc|jduS)zbReturn True if this :class:`._ConnectionFairy` still refers to an active DBAPI connection.N)rprTs rrz_ConnectionFairy.is_valids d**rc|jjS)aInfo dictionary associated with the underlying DBAPI connection referred to by this :class:`.ConnectionFairy`, allowing user-defined data to be associated with the connection. The data here will follow along with the DBAPI connection including after it is returned to the connection pool and used again in subsequent instances of :class:`._ConnectionFairy`. It is shared with the :attr:`._ConnectionRecord.info` and :attr:`_engine.Connection.info` accessors. The dictionary associated with a particular DBAPI connection is discarded when the connection itself is discarded. )r~rrTs rrz_ConnectionFairy.infos"&++rc,|jr |jjSdS)aInfo dictionary associated with the :class:`._ConnectionRecord container referred to by this :class:`.ConnectionFairy`. Unlike the :attr:`._ConnectionFairy.info` dictionary, the lifespan of this dictionary is persistent across connections that are disconnected and/or invalidated within the lifespan of a :class:`._ConnectionRecord`. .. versionadded:: 1.1 N)r~rrTs rrz_ConnectionFairy.record_infos   " *6 64rFc|jtjddS|jr|j|||sd|_|dSdS)aMark this connection as invalidated. This method can be called directly, and is also called as a result of the :meth:`_engine.Connection.invalidate` method. When invoked, the DBAPI connection is immediately closed and discarded from further use by the pool. The invalidation mechanism proceeds via the :meth:`._ConnectionRecord.invalidate` internal method. :param e: an exception object indicating a reason for the invalidation. :param soft: if True, the connection isn't closed; instead, this connection will be recycled on next checkout. .. versionadded:: 1.0.3 .. seealso:: :ref:`pool_connection_invalidation` Nz.Can't invalidate an already-closed connection.)rr)rpr rr~rrrs rrz_ConnectionFairy.invalidatess, ? " IF G G G F  " ?  # . . . > > > "DO MMOOOOO  rc&|jj|i|S)zReturn a new DBAPI cursor for the underlying connection. This method is a proxy for the ``connection.cursor()`` DBAPI method. )rpcursor)rargskwargss rrz_ConnectionFairy.cursors&t%t6v666rc,t|j|Sr)rrp)rkeys r __getattr__z_ConnectionFairy.__getattr__st,,,rcn|j|j}t|d|_d|_|j|j|j|_d|_|jj j r)|jj |j|dSdSdS)a"Separate this connection from its Pool. This means that the connection will no longer be returned to the pool when closed, and will instead be literally closed. The containing ConnectionRecord is separated from the DB-API connection, and will create a new connection when next used. Note that any overall connection limiting constraints imposed by a Pool implementation may be violated after a detach, as the detached connection is removed from the pool's knowledge and control. N) r~rremoverrprrrcopyrBdetachrs rrz_ConnectionFairy.detachs  " .)C LL    CM!CN J & &t'> ? ? ? ((DI&*D #z") A #**4?C@@@@@ / . A Arch|xjdzc_|jdkr|dSdS)Nrar)rrrTs rrz_ConnectionFairy.closes8  =A   MMOOOOO  r)NNr)r#r$r%r&rPrpr~rrrxrr_closerrrrr rrrrrrrrr'rrrwrwsr& JCL"MCMCMC[MC^BBB ' ' 'F(.(.(.T!!X!++X+  ,,,$X">777---AAA4rrwr)r& collectionsrrrrrrrrr r r>r r r objectr Identifiedr)r{rsetrrwr'rrrs -..t{>** T[ & &      6   6X$X$X$X$X$3>X$X$X$v H=H=H=H=H=H=H=H=X;?+$+$+$+$\ zzzzzvzzzzzr