For the latest stable version, please use Spring Boot 3.4.1!

Hazelcast

If Hazelcast is on the classpath and a suitable configuration is found, Spring Boot auto-configures a HazelcastInstance that you can inject in your application.

Spring Boot first attempts to create a client by checking the following configuration options:

  • The presence of a ClientConfig bean.

  • A configuration file defined by the spring.hazelcast.config property.

  • The presence of the hazelcast.client.config system property.

  • A hazelcast-client.xml in the working directory or at the root of the classpath.

  • A hazelcast-client.yaml (or hazelcast-client.yml) in the working directory or at the root of the classpath.

If a client can not be created, Spring Boot attempts to configure an embedded server. If you define a Config bean, Spring Boot uses that. If your configuration defines an instance name, Spring Boot tries to locate an existing instance rather than creating a new one.

You could also specify the Hazelcast configuration file to use through configuration, as shown in the following example:

  • Properties

  • YAML

spring.hazelcast.config=classpath:config/my-hazelcast.xml
spring:
  hazelcast:
    config: "classpath:config/my-hazelcast.xml"

Otherwise, Spring Boot tries to find the Hazelcast configuration from the default locations: hazelcast.xml in the working directory or at the root of the classpath, or a YAML counterpart in the same locations. We also check if the hazelcast.config system property is set. See the Hazelcast documentation for more details.

By default, @SpringAware on Hazelcast components is supported. The ManagedContext can be overridden by declaring a HazelcastConfigCustomizer bean with an @Order higher than zero.
Spring Boot also has explicit caching support for Hazelcast. If caching is enabled, the HazelcastInstance is automatically wrapped in a CacheManager implementation.