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from __future__ import absolute_import
import zope.interface
class IKeyStoreSync(zope.interface.Interface):
def get(key):
"""
Fetch a key
@return None or bytestring value.
"""
def put(key, value):
"""
Create or overwrite a key.
@param key Bytestring key.
@param value Bytestring alue.
@return deferred producing None or error.
"""
def delete(key):
"""
Delete a key.
@param key Bytestring key.
@return deferred producing None or error.
"""
def seek(key):
"""
Seek to a key, or the next highest key.
@param key Bytestring key.
"""
def first():
"""
Seek to the first key in the store.
@return True if positioned on a key.
"""
def last():
"""
Seek to the last key in the store.
@return True if positioned on a key.
"""
def next():
"""
Seek to the next key in the store.
@return True if positioned on a key.
"""
def prev():
"""
Seek to the previous key in the store.
@return True if positioned on a key.
"""
class IKeyStore(zope.interface.Interface):
def get(key):
"""
Fetch a key.
@return deferred producing None or bytestring value.
"""
def getKeys(key, count):
"""
Fetch a list of keys.
@param key
Bytestring first key to return, or None for first/last key
in space.
@param count Number of keys including first key to return.
"""
def getKeysReverse(key, count):
"""
Fetch a list of keys, walking in reverse.
@param key
Bytestring first key to return, or None for first/last key
in space.
@param count Number of keys including first key to return.
"""
def getItems(key, count):
"""
Fetch a list of (key, value) tuples.
@param key
Bytestring first key to return, or None for first/last key
in space.
@param count Number of keys including first key to return.
"""
def getItemsReverse(key, count):
"""
Fetch a list of (key, value) tuples.
@param key
Bytestring first key to return, or None for first/last key
in space.
@param count Number of keys including first key to return.
"""
def put(key):
"""
Create or overwrite a key.
@param key Bytestring key.
@param value Bytestring alue.
@return deferred producing None or error.
"""
def delete(key):
"""
Delete a key.
@param key Bytestring key.
@return deferred producing None or error.
"""
def putGroup(func):
"""
Execute a function in the context of synchronous (IKeyStoreSync)
transaction, in a private thread.
@param func Function accepting IKeyStoreSync parameter.
@returns deferred producing None or error.
"""
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