{"id":28050,"date":"2024-03-16T09:39:01","date_gmt":"2024-03-16T09:39:01","guid":{"rendered":"https:\/\/www.silicloud.com\/blog\/how-can-flink-read-data-from-redis\/"},"modified":"2024-03-22T12:31:03","modified_gmt":"2024-03-22T12:31:03","slug":"how-can-flink-read-data-from-redis","status":"publish","type":"post","link":"https:\/\/www.silicloud.com\/blog\/how-can-flink-read-data-from-redis\/","title":{"rendered":"How can Flink read data from Redis?"},"content":{"rendered":"

One common way to read data in Flink is by connecting to Redis. Here are the general steps to read data from Redis using Flink:<\/p>\n

    \n
  1. Add the necessary dependencies: Include Redis-related dependencies in the pom.xml file of the Flink project, such as:<\/li>\n<\/ol>\n
    <dependency<\/span>><\/span>\r\n    <groupId<\/span>><\/span>org.apache.flink<\/groupId<\/span>><\/span>\r\n    <artifactId<\/span>><\/span>flink-connector-redis_2.11<\/artifactId<\/span>><\/span>\r\n    <version<\/span>><\/span>${flink.version}<\/version<\/span>><\/span>\r\n<\/dependency<\/span>><\/span>\r\n<\/code><\/pre>\n
      \n
    1. Set up a Flink execution environment.<\/li>\n<\/ol>\n
      StreamExecutionEnvironment<\/span> env<\/span> =<\/span> StreamExecutionEnvironment.getExecutionEnvironment();\r\n<\/code><\/pre>\n
        \n
      1. Create a Redis connection configuration.<\/li>\n<\/ol>\n
        FlinkJedisPoolConfig<\/span> jedisConfig<\/span> =<\/span> new<\/span> FlinkJedisPoolConfig<\/span>.Builder()\r\n        .setHost(\"localhost\"<\/span>)\r\n        .setPort(6379<\/span>)\r\n        .build();\r\n<\/code><\/pre>\n
          \n
        1. includeSource()<\/li>\n<\/ol>\n
          DataStream<String> dataStream = env.addSource(new<\/span> RedisSource<\/span><>(jedisConfig, new<\/span> MyRedisMapper<\/span>()));\r\n<\/code><\/pre>\n
          MyRedisMapper is a custom class that implements the RedisMapper interface, used to specify the data format in Redis and how data is mapped to Flink data streams.<\/p>\n
            \n
          1. RedisMapper is responsible for mapping data to and from a Redis database.<\/li>\n<\/ol>\n
            public<\/span> class<\/span> MyRedisMapper<\/span> implements<\/span> RedisMapper<\/span><String> {\r\n    @Override<\/span>\r\n    public<\/span> RedisCommandDescription getCommandDescription<\/span>()<\/span> {\r\n        \/\/ \u6307\u5b9aRedis\u547d\u4ee4\uff0c\u4f8b\u5982GET key<\/span>\r\n        return<\/span> new<\/span> RedisCommandDescription<\/span>(RedisCommand.GET);\r\n    }\r\n    \r\n    @Override<\/span>\r\n    public<\/span> String getKeyFromData<\/span>(String data)<\/span> {\r\n        \/\/ \u4eceRedis\u4e2d\u83b7\u53d6\u7684\u6570\u636e\u4e2d\u63d0\u53d6\u7528\u4e8e\u5206\u533a\u7684\u952e<\/span>\r\n        return<\/span> data;\r\n    }\r\n    \r\n    @Override<\/span>\r\n    public<\/span> String getValueFromData<\/span>(String data)<\/span> {\r\n        \/\/ \u4eceRedis\u4e2d\u83b7\u53d6\u7684\u6570\u636e\u4e2d\u63d0\u53d6\u503c<\/span>\r\n        return<\/span> data;\r\n    }\r\n}\r\n<\/code><\/pre>\n
              \n
            1. could you please press the print button?<\/li>\n<\/ol>\n
              dataStream.print();\r\n<\/code><\/pre>\n
                \n
              1. carry out<\/li>\n<\/ol>\n
                env.execute(\"Read from Redis\"<\/span>);\r\n<\/code><\/pre>\n
                In this way, Flink can read data from Redis and process it. Please make appropriate adjustments and extensions based on the actual situation.<\/p>\n","protected":false},"excerpt":{"rendered":"
                One common way to read data in Flink is by connecting to Redis. Here are the general steps to read data from Redis using Flink: Add the necessary dependencies: Include Redis-related dependencies in the pom.xml file of the Flink project, such as: <dependency> <groupId>org.apache.flink<\/groupId> <artifactId>flink-connector-redis_2.11<\/artifactId> <version>${flink.version}<\/version> <\/dependency> Set up a Flink execution environment. StreamExecutionEnvironment env […]<\/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-28050","post","type-post","status-publish","format-standard","hentry","category-uncategorized"],"yoast_head":"\nHow can Flink read data from Redis? - Blog - Silicon Cloud<\/title>\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-can-flink-read-data-from-redis\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"How can Flink read data from Redis?\" \/>\n<meta property=\"og:description\" content=\"One common way to read data in Flink is by connecting to Redis. Here are the general steps to read data from Redis using Flink: Add the necessary dependencies: Include Redis-related dependencies in the pom.xml file of the Flink project, such as: <dependency> <groupId>org.apache.flink<\/groupId> <artifactId>flink-connector-redis_2.11<\/artifactId> <version>${flink.version}<\/version> <\/dependency> Set up a Flink execution environment. StreamExecutionEnvironment env […]\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.silicloud.com\/blog\/how-can-flink-read-data-from-redis\/\" \/>\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=\"2024-03-16T09:39:01+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2024-03-22T12:31:03+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-can-flink-read-data-from-redis\/#article\",\"isPartOf\":{\"@id\":\"https:\/\/www.silicloud.com\/blog\/how-can-flink-read-data-from-redis\/\"},\"author\":{\"name\":\"Jackson Davis\",\"@id\":\"https:\/\/www.silicloud.com\/blog\/#\/schema\/person\/55a10b8b0457c35884c25677889ad350\"},\"headline\":\"How can Flink read data from Redis?\",\"datePublished\":\"2024-03-16T09:39:01+00:00\",\"dateModified\":\"2024-03-22T12:31:03+00:00\",\"mainEntityOfPage\":{\"@id\":\"https:\/\/www.silicloud.com\/blog\/how-can-flink-read-data-from-redis\/\"},\"wordCount\":133,\"commentCount\":0,\"publisher\":{\"@id\":\"https:\/\/www.silicloud.com\/blog\/#organization\"},\"inLanguage\":\"en-US\"},{\"@type\":\"WebPage\",\"@id\":\"https:\/\/www.silicloud.com\/blog\/how-can-flink-read-data-from-redis\/\",\"url\":\"https:\/\/www.silicloud.com\/blog\/how-can-flink-read-data-from-redis\/\",\"name\":\"How can Flink read data from Redis? - Blog - Silicon Cloud\",\"isPartOf\":{\"@id\":\"https:\/\/www.silicloud.com\/blog\/#website\"},\"datePublished\":\"2024-03-16T09:39:01+00:00\",\"dateModified\":\"2024-03-22T12:31:03+00:00\",\"breadcrumb\":{\"@id\":\"https:\/\/www.silicloud.com\/blog\/how-can-flink-read-data-from-redis\/#breadcrumb\"},\"inLanguage\":\"en-US\",\"potentialAction\":[{\"@type\":\"ReadAction\",\"target\":[\"https:\/\/www.silicloud.com\/blog\/how-can-flink-read-data-from-redis\/\"]}]},{\"@type\":\"BreadcrumbList\",\"@id\":\"https:\/\/www.silicloud.com\/blog\/how-can-flink-read-data-from-redis\/#breadcrumb\",\"itemListElement\":[{\"@type\":\"ListItem\",\"position\":1,\"name\":\"Home\",\"item\":\"https:\/\/www.silicloud.com\/blog\/\"},{\"@type\":\"ListItem\",\"position\":2,\"name\":\"How can Flink read data from Redis?\"}]},{\"@type\":\"WebSite\",\"@id\":\"https:\/\/www.silicloud.com\/blog\/#website\",\"url\":\"https:\/\/www.silicloud.com\/blog\/\",\"name\":\"Silicon Cloud Blog\",\"description\":\"\",\"publisher\":{\"@id\":\"https:\/\/www.silicloud.com\/blog\/#organization\"},\"inLanguage\":\"en-US\"},{\"@type\":\"Organization\",\"@id\":\"https:\/\/www.silicloud.com\/blog\/#organization\",\"name\":\"Silicon Cloud Blog\",\"url\":\"https:\/\/www.silicloud.com\/blog\/\",\"logo\":{\"@type\":\"ImageObject\",\"inLanguage\":\"en-US\",\"@id\":\"https:\/\/www.silicloud.com\/blog\/#\/schema\/logo\/image\/\",\"url\":\"https:\/\/www.silicloud.com\/blog\/wp-content\/uploads\/2023\/11\/EN-SILICON-Full.png\",\"contentUrl\":\"https:\/\/www.silicloud.com\/blog\/wp-content\/uploads\/2023\/11\/EN-SILICON-Full.png\",\"width\":1024,\"height\":1024,\"caption\":\"Silicon Cloud Blog\"},\"image\":{\"@id\":\"https:\/\/www.silicloud.com\/blog\/#\/schema\/logo\/image\/\"},\"sameAs\":[\"https:\/\/www.facebook.com\/SiliCloudGlobal\/\",\"https:\/\/twitter.com\/SiliCloudGlobal\"]},{\"@type\":\"Person\",\"@id\":\"https:\/\/www.silicloud.com\/blog\/#\/schema\/person\/55a10b8b0457c35884c25677889ad350\",\"name\":\"Jackson Davis\",\"image\":{\"@type\":\"ImageObject\",\"inLanguage\":\"en-US\",\"@id\":\"https:\/\/www.silicloud.com\/blog\/#\/schema\/person\/image\/\",\"url\":\"https:\/\/secure.gravatar.com\/avatar\/2fdb47d6df1226e92380d96973782572a97b0675d098bb914410dec348eb5d29?s=96&d=mm&r=g\",\"contentUrl\":\"https:\/\/secure.gravatar.com\/avatar\/2fdb47d6df1226e92380d96973782572a97b0675d098bb914410dec348eb5d29?s=96&d=mm&r=g\",\"caption\":\"Jackson Davis\"},\"url\":\"https:\/\/www.silicloud.com\/blog\/author\/jacksondavis\/\"}]}<\/script>\n<!-- \/ Yoast SEO Premium plugin. -->","yoast_head_json":{"title":"How can Flink read data from Redis? - Blog - Silicon Cloud","robots":{"index":"index","follow":"follow","max-snippet":"max-snippet:-1","max-image-preview":"max-image-preview:large","max-video-preview":"max-video-preview:-1"},"canonical":"https:\/\/www.silicloud.com\/blog\/how-can-flink-read-data-from-redis\/","og_locale":"en_US","og_type":"article","og_title":"How can Flink read data from Redis?","og_description":"One common way to read data in Flink is by connecting to Redis. Here are the general steps to read data from Redis using Flink: Add the necessary dependencies: Include Redis-related dependencies in the pom.xml file of the Flink project, such as: <dependency> <groupId>org.apache.flink<\/groupId> <artifactId>flink-connector-redis_2.11<\/artifactId> <version>${flink.version}<\/version> <\/dependency> Set up a Flink execution environment. StreamExecutionEnvironment env […]","og_url":"https:\/\/www.silicloud.com\/blog\/how-can-flink-read-data-from-redis\/","og_site_name":"Blog - Silicon Cloud","article_publisher":"https:\/\/www.facebook.com\/SiliCloudGlobal\/","article_published_time":"2024-03-16T09:39:01+00:00","article_modified_time":"2024-03-22T12:31:03+00:00","author":"Jackson Davis","twitter_card":"summary_large_image","twitter_creator":"@SiliCloudGlobal","twitter_site":"@SiliCloudGlobal","twitter_misc":{"Written by":"Jackson Davis","Est. reading time":"1 minute"},"schema":{"@context":"https:\/\/schema.org","@graph":[{"@type":"Article","@id":"https:\/\/www.silicloud.com\/blog\/how-can-flink-read-data-from-redis\/#article","isPartOf":{"@id":"https:\/\/www.silicloud.com\/blog\/how-can-flink-read-data-from-redis\/"},"author":{"name":"Jackson Davis","@id":"https:\/\/www.silicloud.com\/blog\/#\/schema\/person\/55a10b8b0457c35884c25677889ad350"},"headline":"How can Flink read data from Redis?","datePublished":"2024-03-16T09:39:01+00:00","dateModified":"2024-03-22T12:31:03+00:00","mainEntityOfPage":{"@id":"https:\/\/www.silicloud.com\/blog\/how-can-flink-read-data-from-redis\/"},"wordCount":133,"commentCount":0,"publisher":{"@id":"https:\/\/www.silicloud.com\/blog\/#organization"},"inLanguage":"en-US"},{"@type":"WebPage","@id":"https:\/\/www.silicloud.com\/blog\/how-can-flink-read-data-from-redis\/","url":"https:\/\/www.silicloud.com\/blog\/how-can-flink-read-data-from-redis\/","name":"How can Flink read data from Redis? - Blog - Silicon Cloud","isPartOf":{"@id":"https:\/\/www.silicloud.com\/blog\/#website"},"datePublished":"2024-03-16T09:39:01+00:00","dateModified":"2024-03-22T12:31:03+00:00","breadcrumb":{"@id":"https:\/\/www.silicloud.com\/blog\/how-can-flink-read-data-from-redis\/#breadcrumb"},"inLanguage":"en-US","potentialAction":[{"@type":"ReadAction","target":["https:\/\/www.silicloud.com\/blog\/how-can-flink-read-data-from-redis\/"]}]},{"@type":"BreadcrumbList","@id":"https:\/\/www.silicloud.com\/blog\/how-can-flink-read-data-from-redis\/#breadcrumb","itemListElement":[{"@type":"ListItem","position":1,"name":"Home","item":"https:\/\/www.silicloud.com\/blog\/"},{"@type":"ListItem","position":2,"name":"How can Flink read data from Redis?"}]},{"@type":"WebSite","@id":"https:\/\/www.silicloud.com\/blog\/#website","url":"https:\/\/www.silicloud.com\/blog\/","name":"Silicon Cloud Blog","description":"","publisher":{"@id":"https:\/\/www.silicloud.com\/blog\/#organization"},"inLanguage":"en-US"},{"@type":"Organization","@id":"https:\/\/www.silicloud.com\/blog\/#organization","name":"Silicon Cloud Blog","url":"https:\/\/www.silicloud.com\/blog\/","logo":{"@type":"ImageObject","inLanguage":"en-US","@id":"https:\/\/www.silicloud.com\/blog\/#\/schema\/logo\/image\/","url":"https:\/\/www.silicloud.com\/blog\/wp-content\/uploads\/2023\/11\/EN-SILICON-Full.png","contentUrl":"https:\/\/www.silicloud.com\/blog\/wp-content\/uploads\/2023\/11\/EN-SILICON-Full.png","width":1024,"height":1024,"caption":"Silicon Cloud Blog"},"image":{"@id":"https:\/\/www.silicloud.com\/blog\/#\/schema\/logo\/image\/"},"sameAs":["https:\/\/www.facebook.com\/SiliCloudGlobal\/","https:\/\/twitter.com\/SiliCloudGlobal"]},{"@type":"Person","@id":"https:\/\/www.silicloud.com\/blog\/#\/schema\/person\/55a10b8b0457c35884c25677889ad350","name":"Jackson Davis","image":{"@type":"ImageObject","inLanguage":"en-US","@id":"https:\/\/www.silicloud.com\/blog\/#\/schema\/person\/image\/","url":"https:\/\/secure.gravatar.com\/avatar\/2fdb47d6df1226e92380d96973782572a97b0675d098bb914410dec348eb5d29?s=96&d=mm&r=g","contentUrl":"https:\/\/secure.gravatar.com\/avatar\/2fdb47d6df1226e92380d96973782572a97b0675d098bb914410dec348eb5d29?s=96&d=mm&r=g","caption":"Jackson Davis"},"url":"https:\/\/www.silicloud.com\/blog\/author\/jacksondavis\/"}]}},"_links":{"self":[{"href":"https:\/\/www.silicloud.com\/blog\/wp-json\/wp\/v2\/posts\/28050","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.silicloud.com\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.silicloud.com\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.silicloud.com\/blog\/wp-json\/wp\/v2\/users\/10"}],"replies":[{"embeddable":true,"href":"https:\/\/www.silicloud.com\/blog\/wp-json\/wp\/v2\/comments?post=28050"}],"version-history":[{"count":1,"href":"https:\/\/www.silicloud.com\/blog\/wp-json\/wp\/v2\/posts\/28050\/revisions"}],"predecessor-version":[{"id":62323,"href":"https:\/\/www.silicloud.com\/blog\/wp-json\/wp\/v2\/posts\/28050\/revisions\/62323"}],"wp:attachment":[{"href":"https:\/\/www.silicloud.com\/blog\/wp-json\/wp\/v2\/media?parent=28050"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.silicloud.com\/blog\/wp-json\/wp\/v2\/categories?post=28050"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.silicloud.com\/blog\/wp-json\/wp\/v2\/tags?post=28050"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}