Questions related to Processor or DataFormat

Hi

I want to understand more about Processor, DataFormat, ProducerTemplate and
ConsumerTemplate.
When shall I choose them, I mean what scenarios I must consider using each
of them.

I searched over internet but was not clear enough. I believe its because I
am new to camel and may be not following the terminologies.

Can you please provide any examples with a proper use case.

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