Apache Camel - How to use concurrency with WIPs? (8/250-2016)

Parallel Processing - 
EIPs in Camel that support concurrency - you can turn on parallel processing to use thread pool profiles to apply a matching thread pool (see pg 330 of Camel in Action)

• Aggregate
• Multicast -   (see pg 327 of   Camel in Action)
• parallel processing of multiple routes - best used when multiple routes interacts with multiple systems
• send copies of the msg to multiple routes
• aggregate data after all execution complets
• RecipientList
• Splitter
• Threads
• WireTap

Custom Thread Pool - (see pg 320 of Camel in Action)

• create thread pools using java.util.concurrent.Executors 
• ExecutorService threadpool = Executors.newCachedThreadPool
• the thread pool will grow and shrink - no upper bound - very aggressive
• ExecutorService threadpool = Executors.newFixedThreadPool(20)
• 
  

Staged Event Driven Architecture (SEDA) -  (see pg 322 of Camel in Action)

•  breaks down complex application into statges using internal queues - to handover messages between routes.
• eg:

from("file:\\...").to("seda:test")...from("seda:test?concurrentConsumers=20")

• 20