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Bolt NameFunctionalityReferences
Enrichment SplitterThis bolt extracts fields and values from a message that can be enriched and sends them to the appropriate enrichment bolt. The configuration for which fields have an associated enrichment is stored in Zookeper. 
Enrichment BoltThis bolt takes the enrichment information from the splitter bolt (key + value), extracts the value, cross references the value against the enrichment store, and then sends the value of the enrichment to the joiner bolt. There can be n enrichment bolts and each enrichment bolt has to be associated with a back end store (which is primarily Hbase). These bolts also use an in-memory cache so they don't thrash the back end reference store. There is a corresponding bulk loader provided per enrichment to be able to bootstrap the enrichment storeEnrichments 
Enrichment Joiner BoltJoin the enrichments with the original message. The bolt waits for all the enrichments to come in prior to joining. If an enrichment part does not come in, then the bolt times out that enrichment and sends the message down the topology without that enrichment part. 
Threat Intel Splitter Bolt Splits the message the same way the Enrichment Splitter does. Based on Zookeeper configs, parts of the message that can be enriched get passed to the Threat Intel bolt, which checks for threat data on that element. 
Threat Intel Bolt This bolt takes the enrichment information from the splitter bolt (key + value), extracts the value, cross references the value against the Threat Intel store, and then sends the value of the enrichment to the joiner bolt. There can be n enrichment bolts and each enrichment bolt has to be associated with a back end store (which is primarily Hbase). These bolts also use an in-memory cache so they don't thrash the back end reference store. There is a corresponding bulk loader provided per enrichment to be able to bootstrap the enrichment storeThreat Intel 
Threat Intel Joiner Bolt  
Writer Bolt See Supported Data Stores for a list of available extensions