[jira] [Created] (CAMEL-16213) exchnage pooling

["Luca Burgazzoli (Jira)" <ji...@apache.org>]

Luca Burgazzoli created CAMEL-16213:
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             Summary: exchnage pooling
                 Key: CAMEL-16213
                 URL: https://issues.apache.org/jira/browse/CAMEL-16213
             Project: Camel
          Issue Type: Improvement
          Components: came-core
            Reporter: Luca Burgazzoli


By default a brand new exchange is created for each message received by a component and that's usually fine but for very simple routes, like those created by the camel-kafka-connector or the Kantive Sources in camel-k it may be useful to have an option to create pools of reusable exchanges as:
- exchanges are short living objects and routes are simple 
- exchanges are heavy (multiple maps for properties and headers)
- camel-kafka-connector and knative sources are likely to receive the same messages type, with the same set of headers so the maps allocated by the exchange can safely be recycled to reduce allocations and resizing

In addition to the reason above, we can leverages exchange pooling to:
- implement back pressure driven by the resource constraints to be sure we don't exceed resources consumption and we don't degrade the the service (i.e. long GC pause) 
- have a way to create tailored exchanges, i.e. by providing an exchange that does not have in/out but just in  




https://github.com/chrisvest/stormpot



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