Merge pull request #32184 from ldziedziul

* pr/32184:
  Polish "Make sure Hazelcast shutdown logs are available"
  Make sure Hazelcast shutdown logs are available

Closes gh-32184

spring-boot-project/spring-boot-autoconfigure/src/main/java/org/springframework/boot/autoconfigure/hazelcast/HazelcastServerConfiguration.java

@@ -52,6 +52,8 @@ class HazelcastServerConfiguration {
 
 	static final String CONFIG_SYSTEM_PROPERTY = "hazelcast.config";
 
+	static final String HAZELCAST_LOGGING_TYPE = "hazelcast.logging.type";
+
 	private static HazelcastInstance getHazelcastInstance(Config config) {
 		if (StringUtils.hasText(config.getInstanceName())) {
 			return Hazelcast.getOrCreateHazelcastInstance(config);
@@ -123,6 +125,22 @@ class HazelcastServerConfiguration {
 
 	}
 
+	@Configuration(proxyBeanMethods = false)
+	@ConditionalOnClass(org.slf4j.Logger.class)
+	static class HazelcastLoggingConfigCustomizerConfiguration {
+
+		@Bean
+		@Order(0)
+		HazelcastConfigCustomizer loggingHazelcastConfigCustomizer() {
+			return (config) -> {
+				if (!config.getProperties().containsKey(HAZELCAST_LOGGING_TYPE)) {
+					config.setProperty(HAZELCAST_LOGGING_TYPE, "slf4j");
+				}
+			};
+		}
+
+	}
+
 	/**
 	 * {@link HazelcastConfigResourceCondition} that checks if the
 	 * {@code spring.hazelcast.config} configuration key is defined.

spring-boot-project/spring-boot-autoconfigure/src/test/java/org/springframework/boot/autoconfigure/hazelcast/HazelcastAutoConfigurationServerTests.java

@@ -206,6 +206,22 @@ class HazelcastAutoConfigurationServerTests {
 		});
 	}
 
+	@Test
+	void autoConfiguredConfigSetsHazelcastLoggingToSlf4j() {
+		this.contextRunner.run((context) -> {
+			Config config = context.getBean(HazelcastInstance.class).getConfig();
+			assertThat(config.getProperty(HazelcastServerConfiguration.HAZELCAST_LOGGING_TYPE)).isEqualTo("slf4j");
+		});
+	}
+
+	@Test
+	void autoConfiguredConfigCanOverrideHazelcastLogging() {
+		this.contextRunner.withUserConfiguration(HazelcastConfigWithJDKLogging.class).run((context) -> {
+			Config config = context.getBean(HazelcastInstance.class).getConfig();
+			assertThat(config.getProperty(HazelcastServerConfiguration.HAZELCAST_LOGGING_TYPE)).isEqualTo("jdk");
+		});
+	}
+
 	private static Config createTestConfig(String instanceName) {
 		Config config = new Config(instanceName);
 		JoinConfig join = config.getNetworkConfig().getJoin();
@@ -236,6 +252,18 @@ class HazelcastAutoConfigurationServerTests {
 
 	}
 
+	@Configuration(proxyBeanMethods = false)
+	static class HazelcastConfigWithJDKLogging {
+
+		@Bean
+		Config anotherHazelcastConfig() {
+			Config config = new Config();
+			config.setProperty(HazelcastServerConfiguration.HAZELCAST_LOGGING_TYPE, "jdk");
+			return config;
+		}
+
+	}
+
 	@SpringAware
 	static class SpringAwareEntryProcessor<V> implements EntryProcessor<String, V, String> {