Gets the content of a FlowFile and puts it to a distributed map cache, using a cache key computed from FlowFile attributes. If the cache already contains the entry and the cache update strategy is ‘keep original’ the entry is not replaced.’


map, cache, put, distributed


In the list below, the names of required properties appear in bold. Any other properties (not in bold) are considered optional. The table also indicates any default values, and whether a property supports the Expression Language Guide.

Name Default Value Allowable Values Description
Cache Entry Identifier A FlowFile attribute, or the results of an Attribute Expression Language statement, which will be evaluated against a FlowFile in order to determine the cache key
Supports Expression Language: true
Distributed Cache Service Controller Service API:
The Controller Service that is used to cache flow files
Cache update strategy replace * Replace if present
* Keep original
Determines how the cache is updated if the cache already contains the entry
Max cache entry size 1 MB The maximum amount of data to put into cache


Name Description
failure Any FlowFile that cannot be inserted into the cache will be routed to this relationship
success Any FlowFile that is successfully inserted into cache will be routed to this relationship

Reads Attributes:

None specified.

Writes Attributes:

Name Description
cached All FlowFiles will have an attribute 'cached'. The value of this attribute is true, is the FlowFile is cached, otherwise false.

See Also:

DistributedMapCacheClientService, DistributedMapCacheServer, FetchDistributedMapCache