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This page describes how to use Pub/Sub in Java applications built with
the Spring Framework.
Spring Cloud GCP has several modules for sending
messages to Pub/Sub topics and receiving messages from
Pub/Sub subscriptions using the Spring Framework. You can use
these modules independently or combine them for different use cases:
Spring Cloud GCP Pub/Sub Starter
lets you send and receive messages using helper classes
and call the Pub/Sub Java client library for more advanced scenarios.
Spring Integration Channel Adapters for Pub/Sub let you connect
Spring Integration Message Channels
with Pub/Sub.
Spring Cloud Stream Binder for Pub/Sub lets you use Pub/Sub as
messaging middleware in Spring Cloud Stream applications.
[[["Easy to understand","easyToUnderstand","thumb-up"],["Solved my problem","solvedMyProblem","thumb-up"],["Other","otherUp","thumb-up"]],[["Hard to understand","hardToUnderstand","thumb-down"],["Incorrect information or sample code","incorrectInformationOrSampleCode","thumb-down"],["Missing the information/samples I need","missingTheInformationSamplesINeed","thumb-down"],["Other","otherDown","thumb-down"]],["Last updated 2025-08-25 UTC."],[],[],null,["# Using Pub/Sub in Spring applications\n\nThis page describes how to use Pub/Sub in Java applications built with\nthe [Spring Framework](https://spring.io/projects/spring-framework).\n\n[Spring Cloud GCP](https://googlecloudplatform.github.io/spring-cloud-gcp/reference/html/index.html) has several modules for sending\nmessages to Pub/Sub topics and receiving messages from\nPub/Sub subscriptions using the Spring Framework. You can use\nthese modules independently or combine them for different use cases:\n\n- **Spring Cloud GCP Pub/Sub Starter** lets you send and receive messages using helper classes and call the Pub/Sub Java client library for more advanced scenarios.\n- **Spring Integration Channel Adapters for Pub/Sub** let you connect Spring Integration [Message Channels](https://docs.spring.io/spring-integration/reference/channel.html) with Pub/Sub.\n- **Spring Cloud Stream Binder for Pub/Sub** lets you use Pub/Sub as messaging middleware in Spring Cloud Stream applications.\n\n| **Note:** The [Spring Cloud GCP](https://github.com/GoogleCloudPlatform/spring-cloud-gcp/tree/main/spring-cloud-gcp-pubsub/src)Library does not provide access to [AckReplyConsumerWithResponse](/java/docs/reference/google-cloud-pubsub/latest/com.google.cloud.pubsub.v1.AckReplyConsumerWithResponse), which is a required module to implement the exactly-once feature using the Java client library.\n\nUsing Spring Cloud GCP Pub/Sub Starter\n--------------------------------------\n\nFollow [Spring Framework on Google Cloud reference guide - Cloud Pub/Sub](https://googlecloudplatform.github.io/spring-cloud-gcp/reference/html/index.html#cloud-pubsub)\nfor further details on the Spring Cloud GCP Pub/Sub Starter and instructions on how to use it.\n\nUsing Spring Integration channel adapters\n-----------------------------------------\n\nFollow [Spring Framework on Google Cloud reference guide - Channel Adapters for Cloud Pub/Sub](https://googlecloudplatform.github.io/spring-cloud-gcp/reference/html/index.html#channel-adapters-for-cloud-pubsub)\nfor further details on the Spring Integration channel adapters and instructions on how to use them.\n\nUsing Spring Cloud Stream Binder\n--------------------------------\n\nFollow [Spring Framework on Google Cloud reference guide - Spring Cloud Stream Binder for Cloud Pub/Sub](https://googlecloudplatform.github.io/spring-cloud-gcp/reference/html/index.html#spring-cloud-stream)\nfor further details on the Spring Cloud Stream Binder and instructions on how to use it."]]
