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openhab-addons/bundles/org.openhab.persistence.inmemory
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lsiepel 90da4e40cc Apply Spotless after release (#17016) 
* Spotless

Signed-off-by: Leo Siepel <leosiepel@gmail.com>
Signed-off-by: Ciprian Pascu <contact@ciprianpascu.ro>
2025-01-02 09:49:00 +02:00
..
src New Crowdin updates (#16967) 2025-01-02 09:48:58 +02:00
NOTICE [inmemory] Initial contribution (#15063) 2023-06-24 11:15:09 +02:00
pom.xml Apply Spotless after release (#17016) 2025-01-02 09:49:00 +02:00
README.md [inmemory] Default persistence strategy Forecast (#16496) 2025-01-02 09:48:57 +02:00

README.md

InMemory Persistence

The InMemory persistence service provides a volatile storage, i.e. it is cleared on shutdown. Because of that the restoreOnStartup strategy is not supported for this service.

The main use-case is to store data that is needed during runtime, e.g. temporary storage of forecast data that is retrieved from a binding.

The default strategy for this service is forecast. Unlike other persistence services, you MUST add a configuration, otherwise no data will be persisted. To avoid excessive memory usage, it is recommended to persist only a limited number of items and use a strategy that stores only data that is actually needed.

The service has a global configuration option maxEntries to limit the number of datapoints per item, the default value is 512. When the number of datapoints is reached and a new value is persisted, the oldest (by timestamp) value will be removed. A maxEntries value of 0 disables automatic purging.