Introduce RedisSessionExpirationStore

With this commit it is now possible to customize the expiration policy in RedisIndexedHttpSession

Closes gh-2906

spring-session-data-redis/src/integration-test/java/org/springframework/session/data/redis/RedisIndexedSessionRepositoryITests.java

@@ -19,6 +19,7 @@ package org.springframework.session.data.redis;
 import java.nio.charset.StandardCharsets;
 import java.util.Map;
 import java.util.UUID;
+import java.util.concurrent.TimeUnit;
 
 import org.junit.jupiter.api.BeforeEach;
 import org.junit.jupiter.api.Test;
@@ -135,6 +136,22 @@ class RedisIndexedSessionRepositoryITests extends AbstractRedisITests {
 			.isEqualTo(expectedAttributeValue);
 	}
 
+	@Test
+	void saveThenSaveSessionKeyAndShadowKeyWith5MinutesDifference() {
+		RedisSession toSave = this.repository.createSession();
+		String expectedAttributeName = "a";
+		String expectedAttributeValue = "b";
+		toSave.setAttribute(expectedAttributeName, expectedAttributeValue);
+		this.repository.save(toSave);
+
+		Long sessionKeyExpire = this.redis.getExpire("RedisIndexedSessionRepositoryITests:sessions:" + toSave.getId(),
+				TimeUnit.SECONDS);
+		Long shadowKeyExpire = this.redis
+			.getExpire("RedisIndexedSessionRepositoryITests:sessions:expires:" + toSave.getId(), TimeUnit.SECONDS);
+		long differenceInSeconds = sessionKeyExpire - shadowKeyExpire;
+		assertThat(differenceInSeconds).isEqualTo(300);
+	}
+
 	@Test
 	void putAllOnSingleAttrDoesNotRemoveOld() {
 		RedisSession toSave = this.repository.createSession();

spring-session-data-redis/src/integration-test/java/org/springframework/session/data/redis/SortedSetRedisSessionExpirationStoreITests.java

@@ -0,0 +1,121 @@
+/*
+ * Copyright 2014-2024 the original author or authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      https://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.springframework.session.data.redis;
+
+import java.time.Clock;
+import java.time.Duration;
+import java.time.Instant;
+import java.time.LocalDateTime;
+import java.time.ZoneOffset;
+
+import org.junit.jupiter.api.Test;
+import org.junit.jupiter.api.extension.ExtendWith;
+
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.context.annotation.Bean;
+import org.springframework.context.annotation.Configuration;
+import org.springframework.context.annotation.Import;
+import org.springframework.data.redis.connection.RedisConnectionFactory;
+import org.springframework.data.redis.core.RedisTemplate;
+import org.springframework.data.redis.serializer.RedisSerializer;
+import org.springframework.session.data.redis.RedisIndexedSessionRepository.RedisSession;
+import org.springframework.test.context.ContextConfiguration;
+import org.springframework.test.context.junit.jupiter.SpringExtension;
+import org.springframework.test.context.web.WebAppConfiguration;
+
+import static org.assertj.core.api.Assertions.assertThat;
+import static org.mockito.BDDMockito.given;
+import static org.mockito.Mockito.mock;
+
+/**
+ * Tests for {@link SortedSetRedisSessionExpirationStore}
+ *
+ * @author Marcus da Coregio
+ */
+@ExtendWith(SpringExtension.class)
+@ContextConfiguration(classes = SortedSetRedisSessionExpirationStoreITests.Config.class)
+@WebAppConfiguration
+class SortedSetRedisSessionExpirationStoreITests {
+
+	@Autowired
+	private SortedSetRedisSessionExpirationStore expirationStore;
+
+	@Autowired
+	private RedisTemplate<String, Object> redisTemplate;
+
+	private static final Instant mockedTime = LocalDateTime.of(2024, 5, 8, 10, 30, 0)
+		.atZone(ZoneOffset.UTC)
+		.toInstant();
+
+	private static final Clock clock;
+
+	static {
+		clock = Clock.fixed(mockedTime, ZoneOffset.UTC);
+	}
+
+	@Test
+	void saveThenStoreSessionWithItsExpiration() {
+		Instant expireAt = mockedTime.plusSeconds(5);
+		RedisSession session = createSession("123", expireAt);
+		this.expirationStore.save(session);
+		Double score = this.redisTemplate.opsForZSet().score("spring:session:sessions:expirations", "123");
+		assertThat(score).isEqualTo(expireAt.toEpochMilli());
+	}
+
+	@Test
+	void removeWhenSessionIdExistsThenRemoved() {
+		RedisSession session = createSession("toBeRemoved", mockedTime);
+		this.expirationStore.save(session);
+		Double score = this.redisTemplate.opsForZSet().score("spring:session:sessions:expirations", "toBeRemoved");
+		assertThat(score).isEqualTo(mockedTime.toEpochMilli());
+		this.expirationStore.remove("toBeRemoved");
+		score = this.redisTemplate.opsForZSet().score("spring:session:sessions:expirations", "toBeRemoved");
+		assertThat(score).isNull();
+	}
+
+	private RedisSession createSession(String sessionId, Instant expireAt) {
+		RedisSession session = mock();
+		given(session.getId()).willReturn(sessionId);
+		given(session.getLastAccessedTime()).willReturn(expireAt);
+		given(session.getMaxInactiveInterval()).willReturn(Duration.ZERO);
+		return session;
+	}
+
+	@Configuration(proxyBeanMethods = false)
+	@Import(AbstractRedisITests.BaseConfig.class)
+	static class Config {
+
+		@Bean
+		RedisTemplate<String, Object> redisTemplate(RedisConnectionFactory redisConnectionFactory) {
+			RedisTemplate<String, Object> redisTemplate = new RedisTemplate<>();
+			redisTemplate.setKeySerializer(RedisSerializer.string());
+			redisTemplate.setHashKeySerializer(RedisSerializer.string());
+			redisTemplate.setConnectionFactory(redisConnectionFactory);
+			return redisTemplate;
+		}
+
+		@Bean
+		RedisSessionExpirationStore redisSessionExpirationStore(RedisTemplate<String, Object> redisTemplate) {
+			SortedSetRedisSessionExpirationStore store = new SortedSetRedisSessionExpirationStore(redisTemplate,
+					RedisIndexedSessionRepository.DEFAULT_NAMESPACE);
+			store.setClock(SortedSetRedisSessionExpirationStoreITests.clock);
+			return store;
+		}
+
+	}
+
+}