purge
Flush all local data to the persistence service
Syntax
Description
flushes all local data to the persistence service and removes it locally.purgedKeys
= purge(c
)
Examples
Start a persistence service that uses Redis™ as the persistence provider. The service requires a connection name and an open port. Once the service is running, you can connect to the service using the connection name and create a cache.
ctrl = mps.cache.control('myRedisConnection','Redis','Port',4519); start(ctrl) c = mps.cache.connect('myCache', 'Connection', 'myRedisConnection');
Add keys and values to the cache.
put(c,'keyOne',10,'keyTwo',20,'keyThree',30,'keyFour',[400 500],'keyFive',magic(5))
Retain a few keys locally. For more information, see retain
.
retain(c, {'keyOne','keyTwo'})
Modify the local keys and purge the data. Display the keys and values in the cache as a MATLAB® table.
put(c,'keyOne',rand(3),'keyTwo', eye(10)) purgedKeys = purge(c) tt = table(keys(c), get(c,keys(c))','VariableNames',{'Keys','Values'}) display(c)
purgedKeys = 2×1 cell array {'keyOne'} {'keyTwo'} tt = 5×2 table Keys Values __________ ______________ 'keyFive' [ 5×5 double] 'keyFour' [ 1×2 double] 'keyOne' [ 3×3 double] 'keyThree' [ 30] 'keyTwo' [10×10 double] c = RedisCache with properties: Host: 'localhost' Port: 4519 Name: 'myCache' Operations: "read | write | create | update" LocalKeys: {} Connection: 'myRedisConnection' Use getp instead of dot notation to access properties.
Input Arguments
A data cache represented by a persistence provider specific data cache object.
Currently, Redis and MATLAB are the only supported persistence providers. Therefore, the cache objects will be
of type mps.cache.RedisCache
or
mps.cache.MATFileCache
.
Example: c
Output Arguments
List of keys that were written to the persistence service, returned as a cell array of character vectors.
Version History
Introduced in R2018b
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