Q. To determine how many messages to read until it can stop:-

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Q. For correlation when you might not have a size but know that you’re expecting messages that share a common header value within a known time, Spring Integration provides the HeaderAttributeCorrelationStrategy.

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Q. The only custom logic is a POJO with an @Aggregator annotation on a method expecting a collection of Message objects.

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Q. You want to conditionally move a message through different processes based on some criteria.

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Q. There are some convenient default routers available to fill common needs:-

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Q. To receive messages from an external system and process them using Spring Integration.

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Q. Adapters are opaque in nature.

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Q. Sometimes, functionality is made available from within the application via:-

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Q. You use Spring Integration’s inbound-channel-adapter element to wire the TwitterMessageSource and a poller element.

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Q. The API surfaces a Paging object, which works something like Criteria in Hibernate.

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Q. To take an input file or a payload and reliably, and systematically, decompose it into events that an ESB can work with:-

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Q. Spring Integration does support reading files into the bus.

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Q. No processing system (such as an ESB) can deal with a million records at once efficiently.

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Q. Spring Batch reads the file, transforms the records into:-

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Q. The BPM engine would thread together the different actors and work lists,

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Q. You want to expose an interface to clients of your service, without betraying the fact that your service is implemented in terms of messaging middleware.

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Q. Serving to abstract away the functionality of other components in an abbreviated interface to provide courser functionality.

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Q. The capability to hide messaging behind a POJO interface.

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Q. The most fundamental support for gateways comes from the Spring Integration class:-

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Q. The SimpleMessagingGateway needs a request and a response channel, and it coordinates the rest.

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