{"id":2346,"date":"2024-03-12T09:38:52","date_gmt":"2024-03-12T09:38:52","guid":{"rendered":"https:\/\/www.silicloud.com\/blog\/how-to-configure-master-slave-databases-in-spring-boot\/"},"modified":"2024-04-26T14:45:40","modified_gmt":"2024-04-26T14:45:40","slug":"how-to-configure-master-slave-databases-in-spring-boot","status":"publish","type":"post","link":"https:\/\/www.silicloud.com\/blog\/how-to-configure-master-slave-databases-in-spring-boot\/","title":{"rendered":"How to configure master-slave databases in Spring Boot?"},"content":{"rendered":"<p>In <a href=\"https:\/\/spring.io\/\">Spring<\/a> Boot, configuring master-slave databases can be achieved by setting up multiple data sources in the application.properties file. Here is an example configuration:<\/p>\n<p>Configure the main data source in the application.properties file.<\/p>\n<pre class=\"post-pre\"><code class=\"lang-properties\">spring.datasource.url=jdbc:mysql:\/\/localhost:3306\/main_db\r\nspring.datasource.username=root\r\nspring.datasource.password=password\r\nspring.datasource.driver-class-name=com.mysql.cj.jdbc.Driver\r\n<\/code><\/pre>\n<p>Configure the data source in the application.properties file.<\/p>\n<pre class=\"post-pre\"><code class=\"lang-properties\">spring.datasource.secondary.url=jdbc:mysql:\/\/localhost:3306\/secondary_db\r\nspring.datasource.secondary.username=root\r\nspring.datasource.secondary.password=password\r\nspring.datasource.secondary.driver-class-name=com.mysql.cj.jdbc.Driver\r\n<\/code><\/pre>\n<p>3. Create a configuration class to define multiple data source configurations.<\/p>\n<pre class=\"post-pre\"><code class=\"lang-java\">@Configuration\r\npublic class DataSourceConfig {\r\n\r\n    @Primary\r\n    @Bean(name = \"mainDataSource\")\r\n    @ConfigurationProperties(prefix = \"spring.datasource\")\r\n    public DataSource mainDataSource() {\r\n        return DataSourceBuilder.create().build();\r\n    }\r\n\r\n    @Bean(name = \"secondaryDataSource\")\r\n    @ConfigurationProperties(prefix = \"spring.datasource.secondary\")\r\n    public DataSource secondaryDataSource() {\r\n        return DataSourceBuilder.create().build();\r\n    }\r\n}\r\n<\/code><\/pre>\n<p>Specify the data source in the Repository.<\/p>\n<pre class=\"post-pre\"><code class=\"lang-java\">@Repository\r\npublic class MainRepository {\r\n\r\n    @Autowired\r\n    @Qualifier(\"mainDataSource\")\r\n    private DataSource dataSource;\r\n\r\n    \/\/ Repository methods\r\n}\r\n\r\n@Repository\r\npublic class SecondaryRepository {\r\n\r\n    @Autowired\r\n    @Qualifier(\"secondaryDataSource\")\r\n    private DataSource dataSource;\r\n\r\n    \/\/ Repository methods\r\n}\r\n<\/code><\/pre>\n<p>By following the steps above, it is possible to configure master-slave databases in Spring Boot and use different data sources in the Repository for operations.<\/p>\n<p>&nbsp;<\/p>\n<p>&nbsp;<\/p>\n<p>More tutorials<\/p>\n<p><a class=\"LinkSuggestion__Link-sc-1gewdgc-4 cLBplk\" href=\"https:\/\/www.silicloud.com\/blog\/tutorial-on-hibernate-tomcat-jndi-datasource\/\" target=\"_blank\" rel=\"noopener\">Tutorial on how to set up a Hibernate Tomcat JNDI DataSource.<span class=\"sc-gswNZR eASTkv\">(Opens in a new browser tab)<\/span><\/a><\/p>\n<p><a class=\"LinkSuggestion__Link-sc-1gewdgc-4 cLBplk\" href=\"https:\/\/www.silicloud.com\/blog\/what-is-the-principle-behind-redis-master-slave-replication\/\" target=\"_blank\" rel=\"noopener\">What is the principle behind Redis master-slave replication?<span class=\"sc-gswNZR eASTkv\">(Opens in a new browser tab)<\/span><\/a><\/p>\n<p><a class=\"LinkSuggestion__Link-sc-1gewdgc-4 cLBplk\" href=\"https:\/\/www.silicloud.com\/blog\/spring-boot-cli\/\" target=\"_blank\" rel=\"noopener\">Spring Boot CLI<span class=\"sc-gswNZR eASTkv\">(Opens in a new browser tab)<\/span><\/a><\/p>\n<p><a class=\"LinkSuggestion__Link-sc-1gewdgc-4 cLBplk\" href=\"https:\/\/www.silicloud.com\/blog\/how-to-use-databases-in-pyqt5\/\" target=\"_blank\" rel=\"noopener\">How to use databases in PyQt5?<span class=\"sc-gswNZR eASTkv\">(Opens in a new browser tab)<\/span><\/a><\/p>\n<p><a class=\"LinkSuggestion__Link-sc-1gewdgc-4 cLBplk\" href=\"https:\/\/www.silicloud.com\/blog\/how-does-user-permission-management-work-in-hive\/\" target=\"_blank\" rel=\"noopener\">How does user permission management work in Hive?<span class=\"sc-gswNZR eASTkv\">(Opens in a new browser tab)<\/span><\/a><\/p>\n","protected":false},"excerpt":{"rendered":"<p>In Spring Boot, configuring master-slave databases can be achieved by setting up multiple data sources in the application.properties file. Here is an example configuration: Configure the main data source in the application.properties file. spring.datasource.url=jdbc:mysql:\/\/localhost:3306\/main_db spring.datasource.username=root spring.datasource.password=password spring.datasource.driver-class-name=com.mysql.cj.jdbc.Driver Configure the data source in the application.properties file. spring.datasource.secondary.url=jdbc:mysql:\/\/localhost:3306\/secondary_db spring.datasource.secondary.username=root spring.datasource.secondary.password=password spring.datasource.secondary.driver-class-name=com.mysql.cj.jdbc.Driver 3. Create a configuration class to [&hellip;]<\/p>\n","protected":false},"author":10,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_import_markdown_pro_load_document_selector":0,"_import_markdown_pro_submit_text_textarea":"","footnotes":""},"categories":[1],"tags":[],"class_list":["post-2346","post","type-post","status-publish","format-standard","hentry","category-uncategorized"],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v21.5 (Yoast SEO v21.5) - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>How to configure master-slave databases in Spring Boot? - Blog - Silicon Cloud<\/title>\n<meta name=\"description\" content=\"In Spring Boot, configuring master-slave databases can be achieved by setting up multiple data sources in the application.properties file.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.silicloud.com\/blog\/how-to-configure-master-slave-databases-in-spring-boot\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"How to configure master-slave databases in Spring Boot?\" \/>\n<meta property=\"og:description\" content=\"In Spring Boot, configuring master-slave databases can be achieved by setting up multiple data sources in the application.properties file.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.silicloud.com\/blog\/how-to-configure-master-slave-databases-in-spring-boot\/\" \/>\n<meta property=\"og:site_name\" content=\"Blog - Silicon Cloud\" \/>\n<meta property=\"article:publisher\" content=\"https:\/\/www.facebook.com\/SiliCloudGlobal\/\" \/>\n<meta property=\"article:published_time\" content=\"2024-03-12T09:38:52+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2024-04-26T14:45:40+00:00\" \/>\n<meta name=\"author\" content=\"Jackson Davis\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:creator\" content=\"@SiliCloudGlobal\" \/>\n<meta name=\"twitter:site\" content=\"@SiliCloudGlobal\" \/>\n<meta name=\"twitter:label1\" content=\"Written by\" \/>\n\t<meta name=\"twitter:data1\" content=\"Jackson Davis\" \/>\n\t<meta name=\"twitter:label2\" content=\"Est. reading time\" \/>\n\t<meta name=\"twitter:data2\" content=\"1 minute\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\/\/schema.org\",\"@graph\":[{\"@type\":\"Article\",\"@id\":\"https:\/\/www.silicloud.com\/blog\/how-to-configure-master-slave-databases-in-spring-boot\/#article\",\"isPartOf\":{\"@id\":\"https:\/\/www.silicloud.com\/blog\/how-to-configure-master-slave-databases-in-spring-boot\/\"},\"author\":{\"name\":\"Jackson Davis\",\"@id\":\"https:\/\/www.silicloud.com\/blog\/#\/schema\/person\/55a10b8b0457c35884c25677889ad350\"},\"headline\":\"How to configure master-slave databases in Spring Boot?\",\"datePublished\":\"2024-03-12T09:38:52+00:00\",\"dateModified\":\"2024-04-26T14:45:40+00:00\",\"mainEntityOfPage\":{\"@id\":\"https:\/\/www.silicloud.com\/blog\/how-to-configure-master-slave-databases-in-spring-boot\/\"},\"wordCount\":164,\"commentCount\":0,\"publisher\":{\"@id\":\"https:\/\/www.silicloud.com\/blog\/#organization\"},\"inLanguage\":\"en-US\"},{\"@type\":\"WebPage\",\"@id\":\"https:\/\/www.silicloud.com\/blog\/how-to-configure-master-slave-databases-in-spring-boot\/\",\"url\":\"https:\/\/www.silicloud.com\/blog\/how-to-configure-master-slave-databases-in-spring-boot\/\",\"name\":\"How to configure master-slave databases in Spring Boot? 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