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hooks.cpython-310.pyc
o .&aa @ s d dl Z d dlZd dlmZmZ d dlmZmZ d dlm Z e e Z edg dZ d ZdZdZG d d de Zdd d ZG d d d eZG dd deZG dd deZG dd deZdS ) N)deque namedtuple)accepts_kwargssix) EVENT_ALIASESNodeList)firstmiddlelast c @ s e Zd Zdd ZdS )r c C s4 t | j}t | j}t | j}t|||}|S N)copyr r r r )self first_copy middle_copy last_copycopied r 0/usr/lib/python3/dist-packages/botocore/hooks.py__copy__ s zNodeList.__copy__N)__name__ __module__ __qualname__r r r r r r s c C s& | D ]}|d dur|d S q|S )a Find first non None response in a list of tuples. This function can be used to find the first non None response from handlers connected to an event. This is useful if you are interested in the returned responses from event handlers. Example usage:: print(first_non_none_response([(func1, None), (func2, 'foo'), (func3, 'bar')])) # This will print 'foo' :type responses: list of tuples :param responses: The responses from the ``EventHooks.emit`` method. This is a list of tuples, and each tuple is (handler, handler_response). :param default: If no non-None responses are found, then this default value will be returned. :return: The first non-None response in the list of tuples. r Nr ) responsesdefaultresponser r r first_non_none_response& s r c @ sd e Zd Zdd Z dddZ dddZ dd d Zd d Z dd dZdd Z dd Z dS )BaseEventHooksc K s g S )a Call all handlers subscribed to an event. :type event_name: str :param event_name: The name of the event to emit. :type **kwargs: dict :param **kwargs: Arbitrary kwargs to pass through to the subscribed handlers. The ``event_name`` will be injected into the kwargs so it's not necesary to add this to **kwargs. :rtype: list of tuples :return: A list of ``(handler_func, handler_func_return_value)`` r r event_namekwargsr r r emitC s zBaseEventHooks.emitNFc C | j |||| j|d dS )a@ Register an event handler for a given event. If a ``unique_id`` is given, the handler will not be registered if a handler with the ``unique_id`` has already been registered. Handlers are called in the order they have been registered. Note handlers can also be registered with ``register_first()`` and ``register_last()``. All handlers registered with ``register_first()`` are called before handlers registered with ``register()`` which are called before handlers registered with ``register_last()``. register_methodunique_id_uses_countN)_verify_and_register _registerr r handler unique_idr& r r r registerT s zBaseEventHooks.registerc C r# )zRegister an event handler to be called first for an event. All event handlers registered with ``register_first()`` will be called before handlers registered with ``register()`` and ``register_last()``. r$ N)r' _register_firstr) r r r register_firstg s z BaseEventHooks.register_firstc C r# )zRegister an event handler to be called last for an event. All event handlers registered with ``register_last()`` will be called after handlers registered with ``register_first()`` and ``register()``. r$ N)r' _register_lastr) r r r register_lastt s z BaseEventHooks.register_lastc C s& | | | | ||||| d S r )_verify_is_callable_verify_accept_kwargs)r r r* r+ r% r& r r r r' s z#BaseEventHooks._verify_and_registerc C s dS )zUnregister an event handler for a given event. If no ``unique_id`` was given during registration, then the first instance of the event handler is removed (if the event handler has been registered multiple times). Nr r) r r r unregister s zBaseEventHooks.unregisterc C s t |s td| d S )Nz"Event handler %s must be callable.)r callable ValueErrorr funcr r r r1 s z"BaseEventHooks._verify_is_callablec C s0 z t |s td| W dS ty Y dS w )zVerifies a callable accepts kwargs :type func: callable :param func: A callable object. :returns: True, if ``func`` accepts kwargs, otherwise False. z9Event handler %s must accept keyword arguments (**kwargs)FN)r r5 TypeErrorr6 r r r r2 s z$BaseEventHooks._verify_accept_kwargsNFNNF) r r r r" r, r. r0 r' r3 r1 r2 r r r r r B s" r c @ st e Zd Zdd ZdddZdd Zdd Z dd d Z dd dZ dddZ dd Z dddZ dd Z d S )HierarchicalEmitterc C s i | _ t | _i | _d S r ) _lookup_cache _PrefixTrie _handlers_unique_id_handlersr r r r __init__ s z HierarchicalEmitter.__init__Fc C s g }| j |}|du r| j|}|| j |< n|s g S ||d< g }|D ]!}td|| |di |}|||f |rE|durE| S q$|S )a Emit an event with optional keyword arguments. :type event_name: string :param event_name: Name of the event :type kwargs: dict :param kwargs: Arguments to be passed to the handler functions. :type stop_on_response: boolean :param stop_on_response: Whether to stop on the first non-None response. If False, then all handlers will be called. This is especially useful to handlers which mutate data and then want to stop propagation of the event. :rtype: list :return: List of (handler, response) tuples from all processed handlers. Nr z Event %s: calling handler %sr )r< getr> prefix_searchloggerdebugappend)r r r! stop_on_responser handlers_to_callr* r r r r _emit s" zHierarchicalEmitter._emitc K s | ||S )a; Emit an event by name with arguments passed as keyword args. >>> responses = emitter.emit( ... 'my-event.service.operation', arg1='one', arg2='two') :rtype: list :return: List of (handler, response) tuples from all processed handlers. rI r r r r r" s zHierarchicalEmitter.emitc K s | j ||dd}|r|d S dS )a Emit an event by name with arguments passed as keyword args, until the first non-``None`` response is received. This method prevents subsequent handlers from being invoked. >>> handler, response = emitter.emit_until_response( 'my-event.service.operation', arg1='one', arg2='two') :rtype: tuple :return: The first (handler, response) tuple where the response is not ``None``, otherwise (``None``, ``None``). T)rG )NNrJ )r r r! r r r r emit_until_response s z'HierarchicalEmitter.emit_until_responseNc C | j ||||td d S Nsection)_register_section_MIDDLEr) r r r r( z HierarchicalEmitter._registerc C rM rN )rQ _FIRSTr) r r r r- rS z#HierarchicalEmitter._register_firstc C rM rN )rQ _LASTr) r r r r/ rS z"HierarchicalEmitter._register_lastc C s |d urL|| j v r3| j | dd }|r)|s td| | j | d d7 < d S |r1td| d S | jj|||d d|i}|rFd|d< || j |< n | jj|||d i | _d S )NcountzInitial registration of unique id %s was specified to use a counter. Subsequent register calls to unique id must specify use of a counter as well.r zInitial registration of unique id %s was specified to not use a counter. Subsequent register calls to unique id must specify not to use a counter as well.rO r* )r? rB r5 r> append_itemr< )r r r* r+ r& rP rV unique_id_handler_itemr r r rQ s8 z%HierarchicalEmitter._register_sectionc C s |d urPz | j | dd }W n ty Y d S w |r@|d u r&td| |dkr3| j |d }n | j | d d8 < d S |rHtd| | j |d }z | j|| i | _W d S tyg Y d S w )NrV zInitial registration of unique id %s was specified to use a counter. Subsequent unregister calls to unique id must specify use of a counter as well.r r* zInitial registration of unique id %s was specified to not use a counter. Subsequent unregister calls to unique id must specify not to use a counter as well.)r? rB KeyErrorr5 popr> remove_itemr< )r r r* r+ r& rV r r r r3 0 s< z HierarchicalEmitter.unregisterc C s< | }| j }t| j|d< t| j|d< ||_|S )Nr> r? ) __class____dict__r r> r? )r new_instance new_stater r r r R s z HierarchicalEmitter.__copy__)Fr9 r: ) r r r rA rI r" rL r( r- r/ rQ r3 r r r r r r; s$ ( ( "r; c @ sv e Zd ZdddZdd Zdd Z dd d Z dd d Z dd dZ dddZ dd Z dd Z dd Z dS ) EventAliaserNc C s$ || _ |d u r t| _ i | _|| _d S r )_event_aliasesr _alias_name_cache_emitter)r event_emitter event_aliasesr r r rA \ s zEventAliaser.__init__c K | |}| jj|fi |S r )_alias_event_namerc r" r r r! aliased_event_namer r r r" c zEventAliaser.emitc K rf r )rg rc rL rh r r r rL g rj z EventAliaser.emit_until_responseFc C | |}| j||||S r )rg rc r, r r r* r+ r& ri r r r r, k zEventAliaser.registerc C rk r )rg rc r. rl r r r r. r rm zEventAliaser.register_firstc C rk r )rg rc r0 rl r r r r0 y rm zEventAliaser.register_lastc C rk r )rg rc r3 rl r r r r3 rm zEventAliaser.unregisterc C s || j v r | j | S | j D ]H\}}|d}d|vr/z ||||< W n ty. Y qw ||v r@|d}| ||| nqd|}t d||f || j |< | S || j |< |S )N.z!Changing event name from %s to %s) rb ra itemssplitindexr5 _replace_subsectionjoinrD rE )r r old_partnew_part event_parts old_partsnew_namer r r rg s, z EventAliaser._alias_event_namec C sZ t t|D ]$}|| |d kr*|||t| |kr*|g|||t| < d S qd S )Nr )rangelen)r sectionsrw ru ir r r rr s z EventAliaser._replace_subsectionc C s | t| jt| jS r )r\ r rc ra r@ r r r r s zEventAliaser.__copy__r r9 r: ) r r r rA r" rL r, r. r0 r3 rg rr r r r r r r` [ s& & r` c @ sT e Zd ZdZdd ZefddZdd Zdd Zd d Z d d Z dd Z dd Z dS )r= aj Specialized prefix trie that handles wildcards. The prefixes in this case are based on dot separated names so 'foo.bar.baz' is:: foo -> bar -> baz Wildcard support just means that having a key such as 'foo.bar.*.baz' will be matched with a call to ``get_items(key='foo.bar.ANYTHING.baz')``. You can think of this prefix trie as the equivalent as defaultdict(list), except that it can do prefix searches: foo.bar.baz -> A foo.bar -> B foo -> C Calling ``get_items('foo.bar.baz')`` will return [A + B + C], from most specific to least specific. c C s d i d d| _ d S )N)chunkchildrenvalues)_rootr@ r r r rA s z_PrefixTrie.__init__c C s | d}| j}|D ] }||d vr!|di d}||d |< |}q |d | }q |d du r6tg g g |d< |d | | dS )zAdd an item to a key. If a value is already associated with that key, the new value is appended to the list for the key. rn r~ N)r} r r~ r )rp r r rF )r keyvaluerP key_partscurrentpart new_childr r r rW s z_PrefixTrie.append_itemc C s* t }|d}| j}| |||d |S )zCollect all items that are prefixes of key. Prefix in this case are delineated by '.' characters so 'foo.bar.baz' is a 3 chunk sequence of 3 "prefixes" ( "foo", "bar", and "baz"). rn r )r rp r _get_items)r r collectedr r r r r rC s z_PrefixTrie.prefix_searchc C s ||fg}t |}|r[| \}}|d r)|d } | j| j | j } |t| ||ksW|d } | || } | d} |d }| d urL|| |f | d urW|| |f |s d S d S )Nr r~ *r ) rz rZ r r r extendleftreversedrB rF )r starting_noder r starting_indexstack key_parts_len current_noderq node_listcomplete_orderr~ directswildcard next_indexr r r r s& z_PrefixTrie._get_itemsc C s& | d}| j}| j|||dd dS )zRemove an item associated with a key. If the value is not associated with the key a ``ValueError`` will be raised. If the key does not exist in the trie, a ``ValueError`` will be raised. rn r )rq N)rp r _remove_item)r r r r r r r r r[ s z_PrefixTrie.remove_itemc C s |d u rd S |t |k rp|d || }|d urg| ||||d |t |d krR|d }||jv r;|j| n||jv rG|j| n ||jv rR|j| |d sc|d se|d || = d S d S d S tdd| d S )Nr~ r r zkey is not in trie: %srn ) rz rB r r remover r r5 rs )r r r r rq next_noder r r r r ( s* z_PrefixTrie._remove_itemc C s | }| | j}||_|S r )r\ _recursive_copyr] )r new_copy copied_attrsr r r r A s z_PrefixTrie.__copy__c C sV i }| D ]"\}}t|trt|||< qt|tr$| |||< q|||< q|S r )ro isinstancer r dictr )r node copied_noder r r r r r K s z_PrefixTrie._recursive_copyN) r r r __doc__rA rR rW rC r r[ r r r r r r r r= s r= r )r logging collectionsr r botocore.compatr r botocore.utilsr getLoggerr rD _NodeListrT rR rU r r objectr r; r` r= r r r r <module> s" d 6b