feat(memory): Add Sqlite support for JDBC chat memory(#4698)

memory/repository/spring-ai-model-chat-memory-repository-jdbc/pom.xml

@@ -85,6 +85,13 @@
 			<optional>true</optional>
 		</dependency>
 
+		<dependency>
+			<groupId>org.xerial</groupId>
+			<artifactId>sqlite-jdbc</artifactId>
+			<scope>test</scope>
+			<optional>true</optional>
+		</dependency>
+
 		<dependency>
 			<groupId>org.springframework.boot</groupId>
 			<artifactId>spring-boot-starter-test</artifactId>

memory/repository/spring-ai-model-chat-memory-repository-jdbc/src/main/java/org/springframework/ai/chat/memory/repository/jdbc/JdbcChatMemoryRepositoryDialect.java

@@ -78,6 +78,7 @@ static JdbcChatMemoryRepositoryDialect from(DataSource dataSource) {
 			case "MySQL", "MariaDB" -> new MysqlChatMemoryRepositoryDialect();
 			case "Microsoft SQL Server" -> new SqlServerChatMemoryRepositoryDialect();
 			case "HSQL Database Engine" -> new HsqldbChatMemoryRepositoryDialect();
+			case "SQLite" -> new SqliteChatMemoryRepositoryDialect();
 			default -> // Add more as needed
 				new PostgresChatMemoryRepositoryDialect();
 		};

memory/repository/spring-ai-model-chat-memory-repository-jdbc/src/main/java/org/springframework/ai/chat/memory/repository/jdbc/SqliteChatMemoryRepositoryDialect.java

@@ -0,0 +1,47 @@
+/*
+ * Copyright 2024-2025 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.ai.chat.memory.repository.jdbc;
+
+/**
+ * Sqlite dialect for chat memory repository.
+ *
+ * @author guan xu
+ * @since 1.1.0
+ */
+public class SqliteChatMemoryRepositoryDialect implements JdbcChatMemoryRepositoryDialect {
+
+	@Override
+	public String getSelectMessagesSql() {
+		return "SELECT content, type FROM SPRING_AI_CHAT_MEMORY WHERE conversation_id = ? ORDER BY timestamp";
+	}
+
+	@Override
+	public String getInsertMessageSql() {
+		return "INSERT INTO SPRING_AI_CHAT_MEMORY (conversation_id, content, type, timestamp) VALUES (?, ?, ?, ?)";
+	}
+
+	@Override
+	public String getSelectConversationIdsSql() {
+		return "SELECT DISTINCT conversation_id FROM SPRING_AI_CHAT_MEMORY";
+	}
+
+	@Override
+	public String getDeleteMessagesSql() {
+		return "DELETE FROM SPRING_AI_CHAT_MEMORY WHERE conversation_id = ?";
+	}
+
+}

memory/repository/spring-ai-model-chat-memory-repository-jdbc/src/main/resources/org/springframework/ai/chat/memory/repository/jdbc/schema-sqlite.sql

@@ -0,0 +1,10 @@
+CREATE TABLE IF NOT EXISTS SPRING_AI_CHAT_MEMORY (
+    conversation_id TEXT NOT NULL,
+    content TEXT NOT NULL,
+    type TEXT NOT NULL,
+    timestamp INTEGER NOT NULL,
+    CHECK (type IN ('USER', 'ASSISTANT', 'SYSTEM', 'TOOL'))
+);
+
+CREATE INDEX IF NOT EXISTS SPRING_AI_CHAT_MEMORY_CONVERSATION_ID_TIMESTAMP_IDX
+ON SPRING_AI_CHAT_MEMORY(conversation_id, timestamp);

memory/repository/spring-ai-model-chat-memory-repository-jdbc/src/test/java/org/springframework/ai/chat/memory/repository/jdbc/AbstractJdbcChatMemoryRepositoryIT.java

@@ -16,7 +16,6 @@
 
 package org.springframework.ai.chat.memory.repository.jdbc;
 
-import java.sql.Timestamp;
 import java.util.List;
 import java.util.UUID;
 import java.util.stream.Collectors;
@@ -84,7 +83,7 @@ void saveMessagesSingleMessage(String content, MessageType messageType) {
 		assertThat(result.get("conversation_id")).isEqualTo(conversationId);
 		assertThat(result.get("content")).isEqualTo(message.getText());
 		assertThat(result.get("type")).isEqualTo(messageType.name());
-		assertThat(result.get("timestamp")).isInstanceOf(Timestamp.class);
+		assertThat(result.get("timestamp")).isNotNull();
 	}
 
 	@Test
@@ -114,7 +113,7 @@ void saveMessagesMultipleMessages() {
 			assertThat(result.get("conversation_id")).isEqualTo(conversationId);
 			assertThat(result.get("content")).isEqualTo(message.getText());
 			assertThat(result.get("type")).isEqualTo(message.getMessageType().name());
-			assertThat(result.get("timestamp")).isInstanceOf(Timestamp.class);
+			assertThat(result.get("timestamp")).isNotNull();
 		}
 
 		var count = this.chatMemoryRepository.findByConversationId(conversationId).size();

memory/repository/spring-ai-model-chat-memory-repository-jdbc/src/test/java/org/springframework/ai/chat/memory/repository/jdbc/JdbcChatMemoryRepositorySqliteIT.java

@@ -0,0 +1,35 @@
+/*
+ * Copyright 2023-2025 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.ai.chat.memory.repository.jdbc;
+
+import org.springframework.boot.test.context.SpringBootTest;
+import org.springframework.test.context.TestPropertySource;
+import org.springframework.test.context.jdbc.Sql;
+
+/**
+ * Integration tests for {@link JdbcChatMemoryRepository} with Sqlite.
+ *
+ * @author guan xu
+ */
+@SpringBootTest
+@TestPropertySource(properties = { "spring.datasource.url=jdbc:sqlite::memory:",
+		"spring.datasource.driver-class-name=org.sqlite.JDBC",
+		"spring.ai.chat.memory.repository.jdbc.initialize-schema=always" })
+@Sql(scripts = "classpath:org/springframework/ai/chat/memory/repository/jdbc/schema-sqlite.sql")
+class JdbcChatMemoryRepositorySqliteIT extends AbstractJdbcChatMemoryRepositoryIT {
+
+}