An example for Spring Integration with spring-integration-jpa

Question

I see many examples related to spring-integration-file. But I am looking for an example application where it uses spring-integration-jpa to pull data from database using Inbound Channel Adapter and create a Java object out of it.

Any help is much appreciated.

@Artem Bilan. Thank you for your response.

Vicky
– Vicky

2019-03-14 15:06:20 +00:00
Commented Mar 14, 2019 at 15:06 — Vicky
– Vicky, Commented Mar 14, 2019 at 15:06

Artem Bilan · Accepted Answer · 2024-03-07 15:08:00Z

3

There is a basic JPA sample in the official Spring Integration Samples repository: https://github.com/spring-projects/spring-integration-samples/tree/master/basic/jpa.

The simple Java DSL sample for Inbound Channel Adapter might look like this:

    @Bean
    public IntegrationFlow pollingAdapterFlow(EntityManagerFactory entityManagerFactory) {
        return IntegrationFlow
                .from(Jpa.inboundAdapter(entityManagerFactory)
                                .entityClass(StudentDomain.class)
                                .maxResults(1)
                                .expectSingleResult(true),
                        e -> e.poller(p -> p.trigger(new OnlyOnceTrigger())))
                .channel(c -> c.queue("pollingResults"))
                .get();
    }

edited Mar 7, 2024 at 15:08

answered Mar 13, 2019 at 19:10

Artem Bilan

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5 Comments

Ekaterina Over a year ago

Why are (almost) all the examples XML-based in that repository? It's so painfull.

Artem Bilan Over a year ago

Because they have been made those old days when only an XML configuration existed. Right now we just don't have enough resources to maintain Java DSL samples as well.

sam Over a year ago

For java configurations you can see here docs.spring.io/spring-integration/reference/html/…

JGleason Over a year ago

FTR IntegrationFlows is now deprecated so this is no longer the correct answer.

Artem Bilan Over a year ago

Have just fixed my answer. Thanks

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