PutDistributedMapCache
Description
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.'
Tags
cache, distributed, map, put
Properties
In the list below required Properties are shown with an asterisk (*). Other properties are considered optional. The table also indicates any default values, and whether a property supports the NiFi Expression Language.
| Display Name | API Name | Default Value | Allowable Values | Description |
|---|---|---|---|---|
| Cache Entry Identifier * | 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, using FlowFile attributes and Environment variables. | ||
| Distributed Cache Service * | Distributed Cache Service | Controller Service: DistributedMapCacheClient Implementations: HazelcastMapCacheClient MapCacheClientService RedisDistributedMapCacheClientService SimpleRedisDistributedMapCacheClientService | The Controller Service that is used to cache flow files | |
| Cache update strategy * | Cache update strategy | Replace if present |
| Determines how the cache is updated if the cache already contains the entry |
| Max cache entry size | Max cache entry size | 1 MB | The maximum amount of data to put into cache |
Dynamic Properties
This component does not support dynamic properties.
Relationships
| 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
This processor does not read attributes.
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. |
State Management
This component does not store state.
Restricted
This component is not restricted.
Input Requirement
This component requires an incoming relationship.
System Resource Considerations
This component does not specify system resource considerations.
See Also
DistributedMapCacheClientService, DistributedMapCacheServer, FetchDistributedMapCache