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versioned.cpython-39.pyc
a Me- @ s d Z ddlZddlZddlmZmZmZmZmZ ddl Z ddl Z ddl Z ddl Z ddlZ ddlZ ddlZ ddlZ ddlZ G dd de jjZe jjZe jjZe jjZe jj Z e jj Z e jj Z G dd de jj Z dS )zDNS Versioned Zones. N)CallableDequeOptionalSetUnionc @ s e Zd ZdZdS )UseTransactionz-To alter a versioned zone, use a transaction.N)__name__ __module__ __qualname____doc__ r r 1/usr/lib/python3.9/site-packages/dns/versioned.pyr s r c sX e Zd Zg dZeZejjddfe e ej j e f ejjee ed ege e f d fdd Zd7e e e e eddd Zd8eed d d Zdd Zdd Zdd Ze e ddddZe ed ege e f ddddZdd Z d d Z d d Z d d! Z d"d# Z d$d% Z!d9e ej j e f eej"jd& fd'd( Z#e ej j e f dd)d*d+Z$ej%j&d fe ej j e f e ej%j'e f e ej%j'e f eej(j)d, fd-d. Z*ej%j&d fe ej j e f e ej%j'e f e ej%j'e f ee ej(j) d, fd/d0 Z+ej%j&fe ej j e f e ej%j'e f e ej%j'e f dd1d2d3Z,e ej j e f ej(j)dd4d5d6Z- Z.S ):Zone) _versionsZ_versions_lock _write_txn_write_waiters _write_event_pruning_policy_readersTN)originrdclass relativizepruning_policyc st t ||| t | _t | _|du r6| j| _ n|| _ d| _ d| _ t | _ t | _| dt| dd| dS )a Initialize a versioned zone object. *origin* is the origin of the zone. It may be a ``dns.name.Name``, a ``str``, or ``None``. If ``None``, then the zone's origin will be set by the first ``$ORIGIN`` line in a zone file. *rdclass*, an ``int``, the zone's rdata class; the default is class IN. *relativize*, a ``bool``, determine's whether domain names are relativized to the zone's origin. The default is ``True``. *pruning policy*, a function taking a ``Zone`` and a ``Version`` and returning a ``bool``, or ``None``. Should the version be pruned? If ``None``, the default policy, which retains one version is used. NT) replacement)super__init__ collectionsdequer threadingLock _version_lock_default_pruning_policyr r r r setr _commit_version_unlockedWritableVersion)selfr r r r __class__r r r . s z Zone.__init__)idserialreturnc C s: |d ur|d urt d| j |d urbd }t| jD ]}|j|kr8|} qPq8|d u rtdn|d ur| jrztjj }n| j d usJ | j }d }t| jD ]@}|j |}|r| | jtjj}|r|d j|kr|} qq|d u rtdn | jd }t| d|}| j| |W d S 1 s,0 Y d S )Nz!cannot specify both id and serialzversion not foundr zserial not foundF) ValueErrorr reversedr r( KeyErrorr dnsnameemptyr nodesget get_rdatasetr rdatatypeZSOAr) Transactionr add) r% r( r) versionvZonamenZrdstxnr r r readerS s< z Zone.readerF)r r* c C s d }| j \ | jd u rD|| jkrDt| |dd| _d | _W d qt }| j| W d n1 sl0 Y | q| j | jS )NT)Zmake_immutable) r r r r6 r Eventr appendwaitZ_setup_version)r% r Zeventr r r writerw s * z Zone.writerc C s( t | jdkr$| j | _| j d S )Nr )lenr popleftr r" )r% r r r !_maybe_wakeup_one_waiter_unlocked s z&Zone._maybe_wakeup_one_waiter_unlockedc C s dS )NTr )r% zoner8 r r r r! s z Zone._default_pruning_policyc C st t | jdksJ t | jdkr6tdd | jD }n | jd j}| jd j|k rp| | | jd rp| j qBd S )Nr c s s | ]}|j jV qd S N)r8 r( ).0r; r r r <genexpr> z0Zone._prune_versions_unlocked.<locals>.<genexpr>r+ )rA r r minr( r rB )r% Z least_keptr r r _prune_versions_unlocked s z Zone._prune_versions_unlocked) max_versionsr* c sD dur dk rt d du r*dd }n fdd}| | dS )zYSet a pruning policy that retains up to the specified number of versions N z max versions must be at least 1c S s dS )NFr rD _r r r policy s z%Zone.set_max_versions.<locals>.policyc s t | j kS rE )rA r rM rK r r rO s )r, set_pruning_policy)r% rK rO r rP r set_max_versions s zZone.set_max_versions)rO r* c C sF |du r| j }| j || _| W d n1 s80 Y dS )a Set the pruning policy for the zone. The *policy* function takes a `Version` and returns `True` if the version should be pruned, and `False` otherwise. `None` may also be specified for policy, in which case the default policy is used. Pruning checking proceeds from the least version and the first time the function returns `False`, the checking stops. I.e. the retained versions are always a consecutive sequence. N)r! r r rJ )r% rO r r r rQ s zZone.set_pruning_policyc C s> | j $ | j| | W d n1 s00 Y d S rE )r r removerJ r% r; r r r _end_read s zZone._end_readc C s | j |ksJ d | _ | d S rE )r rC rT r r r _end_write_unlocked s zZone._end_write_unlockedc C s4 | j | | W d n1 s&0 Y d S rE )r rV rT r r r _end_write s zZone._end_writec C sB | j | | |j| _| jd u r,|| _|d ur>| | d S rE )r r> rJ r2 r rV r% r; r8 r r r r r# s z Zone._commit_version_unlockedc C s8 | j | ||| W d n1 s*0 Y d S rE )r r# rX r r r _commit_version s zZone._commit_versionc C s( t | jdkr | jd jd }nd}|S )Nr r+ rL )rA r r( )r% r( r r r _get_next_version_id s zZone._get_next_version_id)r0 creater* c s |rt t |S rE )r r find_node)r% r0 r[ r& r r r\ s zZone.find_node)r0 r* c C s t d S rE r )r% r0 r r r delete_node s zZone.delete_node)r0 rdtypecoversr[ r* c s$ |rt t |||}tj|S rE )r r find_rdatasetr/ rdatasetImmutableRdatasetr% r0 r_ r` r[ rb r& r r ra s zZone.find_rdatasetc s4 |rt t |||}|d ur,tj|S d S d S rE )r r r4 r/ rb rc rd r& r r r4 $ s zZone.get_rdataset)r0 r_ r` r* c C s t d S rE r] )r% r0 r_ r` r r r delete_rdataset3 s zZone.delete_rdataset)r0 r r* c C s t d S rE r] )r% r0 r r r r replace_rdataset; s zZone.replace_rdataset)NN)F)F)/r r r __slots__NodeZ node_factoryr/ Z rdataclassINr r r0 NamestrZ RdataClassboolr Versionr intr6 r< r@ rC r! rJ rR rQ rU rV rW r# rY rZ Znoder\ r^ r5 ZNONEZ RdataTyperb ZRdatasetra r4 re rf __classcell__r r r& r r ! s & $1 r ) r r r typingr r r r r Z dns.exceptionr/ Z dns.immutableZdns.nameZdns.nodeZdns.rdataclassZ dns.rdatasetZ dns.rdatatypeZdns.rdtypes.ANY.SOAZdns.zone exceptionZ DNSExceptionr rD Z VersionedNoderh ZImmutableVersionedNodeZ ImmutableNoderm r$ ZImmutableVersionr6 r r r r r <module> s(