8f838d04ce
Fixes: #9455 Issue link: https://github.com/spring-projects/spring-integration/issues/9455 * Add an `IntegrationKeepAlive` infrastructure bean to initiate a long-lived non-daemon thread to keep application alive when it cannot be kept like that for various reason, but has to. * Expose `spring.integration.keepAlive` global property to disable an `IntegrationKeepAlive` auto-startup * Test and document the feature
17 lines
1.6 KiB
Plaintext
17 lines
1.6 KiB
Plaintext
[[keep-alive]]
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= Integration Keep Alive
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Starting with version 6.4, Spring Integration provides an `IntegrationKeepAlive` infrastructure bean.
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It manages an `spring-integration-keep-alive` non-daemon forever thread which keeps an application running.
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In some use-cases, e.g. `WebSocketInboundChannelAdapter` based on the `StandardWebSocketClient` does not use non-daemon thread for session, therefore an application may exit prematurely.
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Or an application logic may have only service activators or outbound channel adapters which rely on some other interaction, but not loops from executors like the one from Web server.
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Or all the threads in the application are virtual.
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The `IntegrationKeepAlive` is started automatically only if `TaskScheduler` is configured for non-daemon threads and there is no `AbstractPollingEndpoint` beans in the application context.
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In case of the `TaskScheduler` bean configured for daemon or virtual threads, the `IntegrationKeepAlive` is started regardless of the presence for `AbstractPollingEndpoint` beans.
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This component can be disabled by the `spring.integration.keepAlive` global property.
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See xref:configuration/global-properties.adoc[Global Properties] for more information.
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The `IntegrationKeepAlive` can be injected in some service and stopped manually if there is no need to keep an application alive or such a status is managed somewhere else.
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See also Spring Boot https://docs.spring.io/spring-boot/reference/features/spring-application.html#features.spring-application.virtual-threads[Virtual Threads] documentation for a `spring.main.keep-alive` property. |