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The Memory Adapter allows to store an entire hash map to memory. The hash map object as a whole can be managed with the Memory adapter the same way as any other objects. Additionally, the Memory adapter allows to add, change, retrieve, and remove elements from a stored hash map. Therefore, the Memory adapter provides an additional parameter hashMapKey. If this parameter is provided, the Memory adapter does not access the entire map, but tries to access the specified element of the map.

This can significantly increase the performance, if you e.g. want to cache some data you frequently need to lookup, in comparison to caching this data in a database.