l) TyrService Cache
- Leonard Schubert
Structure
Each frigg instance has a memory cache with a cache controller. New values are sent to all connected servers per tcp (encrypted serialized objects). The values are grouped by user id. If a function invalidates the cache, the value group is removed on all connected servers. The first new request populates the values for all connected servers again.
This decreases the need to query the database for data that is seldomly changed: more reads then updates. This is the case for polling getSigningRequests for document changes.
At the moment only getSigningRequests is cached. Methods that invalidate the cache can by annotated with "@cache(invalidate=true)", or if the invalidation does not target the logged in user, CacheManager.invalidate(userid) can be used.
Activation and configuration
The tyrservice implementation has to be set to com.stepover.frigg.server.TyrServiceCached. This can not be done for keys with TyrServiceExtended implementation.
UPDATE tyrservice
SET implementation = 'com.stepover.frigg.server.TyrServiceCached'
WHERE tyrservice_id = 'customer-key';in the config.ini
config key | example | description | optional |
|---|---|---|---|
tyrcache | true | activates the tyrservice cachee |
|
tyrcache_port | default 1110 | the port the listener listens on | optional |
tyrcache_host | host | the host the listener listens on, if not set, all hostnames | optional |
tyrcache_servers | host1:1110,host2:1110 | a comma seperated list of servers to connect to |
|
tyrcache_lifetime | default 300 | the lifetime of a cache object in seconds | optional |
tyrcache_max_objects | default 10000 | the maximum amount of objects stored in the cache before objects get evicted | optional |
tyrcache_encryption_key | default value hard coded, should be changed | the key used to encrypt the objects, 32 characters |
|