{"id":86899,"date":"2019-01-22T13:00:10","date_gmt":"2019-01-22T11:00:10","guid":{"rendered":"https:\/\/www.javacodegeeks.com\/?p=86899"},"modified":"2019-01-22T11:32:28","modified_gmt":"2019-01-22T09:32:28","slug":"spring-boot-overriding-bean-definition","status":"publish","type":"post","link":"https:\/\/www.javacodegeeks.com\/2019\/01\/spring-boot-overriding-bean-definition.html","title":{"rendered":"Spring-Boot 2.1.x and overriding bean definition"},"content":{"rendered":"<p>I was recently <a href=\"https:\/\/github.com\/spring-projects\/spring-framework\/wiki\/Upgrading-to-Spring-Framework-5.x#upgrading-to-version-51\">migrating an application from Spring Boot 1.5.X to Spring Boot 2.X<\/a> and saw an issue with overriding Spring Bean definitions. One of the configurations was along these lines in Kotlin:<\/p>\n<pre class=\"wp-block-preformatted brush:java\">@Configuration\nclass DynamoConfig {\n\n    @Bean\n    fun dynamoDbAsyncClient(dynamoProperties: DynamoProperties): DynamoDbAsyncClient {\n        ...\n    }\n\n    @Bean\n    fun dynampoDbSyncClient(dynamoProperties: DynamoProperties): DynamoDbClient {\n        ...\n    }\n}<\/pre>\n<p>Now, for a test I wanted to override these 2 bean definitions and did something along these lines:<\/p>\n<pre class=\"wp-block-preformatted brush:java\">@SpringBootTest\nclass DynamoConfigTest {\n\n    @Test\n    fun saveHotel() {\n        val hotelRepo = DynamoHotelRepo(localDynamoExtension.asyncClient!!)\n        val hotel = Hotel(id = \"1\", name = \"test hotel\", address = \"test address\", state = \"OR\", zip = \"zip\")\n        val resp = hotelRepo.saveHotel(hotel)\n\n        StepVerifier.create(resp)\n                .expectNext(hotel)\n                .expectComplete()\n                .verify()\n    }\n\n\n    @TestConfiguration\n    class SpringConfig {\n        @Bean\n        fun dynamoDbAsyncClient(dynamoProperties: DynamoProperties): DynamoDbAsyncClient {\n            ...\n        }\n\n        @Bean\n        fun dynamoDbSyncClient(dynamoProperties: DynamoProperties): DynamoDbClient {\n            ...\n        }\n    }\n}<\/pre>\n<p>This type of overriding works with Spring Boot 1.5.X but fails with Spring Boot 2.1.X with an error:<div style=\"display:inline-block; margin: 15px 0;\"> <div id=\"adngin-JavaCodeGeeks_incontent_video-0\" style=\"display:inline-block;\"><\/div> <\/div><\/p>\n<pre class=\"wp-block-preformatted brush:java\">Invalid bean definition with name 'dynamoDbAsyncClient' defined in sample.dyn.repo.DynamoConfigTest$SpringConfig:.. \nThere is already .. defined in class path resource [sample\/dyn\/config\/DynamoConfig.class]] bound<\/pre>\n<p>I feel this behavior is right, not allowing beans to overridden this way is the correct default behavior for an application, however I do want the ability to override the beans for tests and thanks to a <a href=\"https:\/\/stackoverflow.com\/questions\/53139244\/spring-boot-2-1-bean-override-vs-primary\">Stack Overflow answer<\/a> and <a href=\"https:\/\/github.com\/spring-projects\/spring-boot\/wiki\/Spring-Boot-2.1-Release-Notes#bean-overriding\">Spring Boot 2.1.X release notes<\/a>, the fix is to allow overrides using a property &#8220;spring.main.allow-bean-definition-overriding=true&#8221;, so with this change, the test looks like this:<\/p>\n<pre class=\"wp-block-preformatted brush:java\">@SpringBootTest(properties = [\"spring.main.allow-bean-definition-overriding=true\"])\nclass DynamoConfigTest {\n\n    @Test\n    fun saveHotel() {\n        val hotelRepo = DynamoHotelRepo(localDynamoExtension.asyncClient!!)\n        val hotel = Hotel(id = \"1\", name = \"test hotel\", address = \"test address\", state = \"OR\", zip = \"zip\")\n        val resp = hotelRepo.saveHotel(hotel)\n\n        StepVerifier.create(resp)\n                .expectNext(hotel)\n                .expectComplete()\n                .verify()\n    }\n\n\n    @TestConfiguration\n    class SpringConfig {\n        @Bean\n        fun dynamoDbAsyncClient(dynamoProperties: DynamoProperties): DynamoDbAsyncClient {\n            ...\n        }\n\n        @Bean\n        fun dynamoDbSyncClient(dynamoProperties: DynamoProperties): DynamoDbClient {\n            ...\n        }\n    }\n}<\/pre>\n<div class=\"attribution\">\n<table>\n<tbody>\n<tr>\n<td>\n<p>Published on Java Code Geeks with permission by Biju Kunjummen, partner at our <a href=\"\/\/www.javacodegeeks.com\/join-us\/jcg\/\" target=\"_blank\" rel=\"noopener\">JCG program<\/a>. See the original article here: <a href=\"http:\/\/www.java-allandsundry.com\/2019\/01\/spring-boot-21x-and-overriding-bean.html\" target=\"_blank\" rel=\"noopener\">Spring-Boot 2.1.x and overriding bean definition<\/a><\/p>\n<p>Opinions expressed by Java Code Geeks contributors are their own.<\/p>\n<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n","protected":false},"excerpt":{"rendered":"<p>I was recently migrating an application from Spring Boot 1.5.X to Spring Boot 2.X and saw an issue with overriding Spring Bean definitions. One of the configurations was along these lines in Kotlin: @Configuration class DynamoConfig { @Bean fun dynamoDbAsyncClient(dynamoProperties: DynamoProperties): DynamoDbAsyncClient { &#8230; } @Bean fun dynampoDbSyncClient(dynamoProperties: DynamoProperties): DynamoDbClient { &#8230; } } Now, &hellip;<\/p>\n","protected":false},"author":236,"featured_media":240,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[8],"tags":[854],"class_list":["post-86899","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-enterprise-java","tag-spring-boot"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.5 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Spring-Boot 2.1.x and overriding bean definition - Java Code Geeks<\/title>\n<meta name=\"description\" content=\"Interested to learn about Spring Bean definitions? 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