{"id":25623,"date":"2020-02-20T15:00:46","date_gmt":"2020-02-20T14:00:46","guid":{"rendered":"https:\/\/www.microsoft.com\/en-gb\/industry\/blog\/?p=25623"},"modified":"2022-02-04T16:27:42","modified_gmt":"2022-02-04T15:27:42","slug":"introducing-event-hubs-data-generator","status":"publish","type":"post","link":"https:\/\/www.microsoft.com\/en-gb\/industry\/blog\/technetuk\/2020\/02\/20\/introducing-event-hubs-data-generator\/","title":{"rendered":"Introducing Event Hubs Data Generator"},"content":{"rendered":"<p><img loading=\"lazy\" decoding=\"async\" class=\"attachment-full size-full webp-format\" src=\"https:\/\/www.microsoft.com\/en-us\/industry\/blog\/wp-content\/uploads\/sites\/22\/2020\/02\/EventHubsHeader.jpg\" alt=\"An image representing Azure Event Hubs, next to an illustration of Bit the Raccoon.\" width=\"1920\" height=\"700\" data-orig-srcset=\"https:\/\/www.microsoft.com\/en-us\/industry\/blog\/wp-content\/uploads\/sites\/22\/2020\/02\/EventHubsHeader.jpg 1920w, https:\/\/www.microsoft.com\/en-us\/industry\/blog\/wp-content\/uploads\/sites\/22\/2020\/02\/EventHubsHeader-300x109.jpg 300w, https:\/\/www.microsoft.com\/en-us\/industry\/blog\/wp-content\/uploads\/sites\/22\/2020\/02\/EventHubsHeader-1024x373.jpg 1024w, https:\/\/www.microsoft.com\/en-us\/industry\/blog\/wp-content\/uploads\/sites\/22\/2020\/02\/EventHubsHeader-768x280.jpg 768w, https:\/\/www.microsoft.com\/en-us\/industry\/blog\/wp-content\/uploads\/sites\/22\/2020\/02\/EventHubsHeader-1536x560.jpg 1536w, https:\/\/www.microsoft.com\/en-us\/industry\/blog\/wp-content\/uploads\/sites\/22\/2020\/02\/EventHubsHeader-330x120.jpg 330w, https:\/\/www.microsoft.com\/en-us\/industry\/blog\/wp-content\/uploads\/sites\/22\/2020\/02\/EventHubsHeader-800x292.jpg 800w, https:\/\/www.microsoft.com\/en-us\/industry\/blog\/wp-content\/uploads\/sites\/22\/2020\/02\/EventHubsHeader-400x146.jpg 400w\" data-orig-src=\"https:\/\/www.microsoft.com\/en-us\/industry\/blog\/wp-content\/uploads\/sites\/22\/2020\/02\/EventHubsHeader.jpg\" \/><\/p>\n<p>Event Hub Data Generator (EHDG) is a tool which generates realistic fake data based on a provided schema and sends it to Azure Event Hubs. The purpose is to remove the pain of initial set up that is faced by many developers. For instance, if someone is trying to demonstrate streaming data sets in PowerBI, they likely need to set up a stream analytics job, and in order for them to set up a stream analytics job, they need data; in particular hot data. Setting up this stream of hot data, particularly data that is useful for your use case, can be a tedious and lengthy process. Even if they had access to real data they could stream, real data is often messy &#8211; requiring endless cleaning. Event Hub Data Generator (EHDG) is here to make simplify this process and allow the developer to work on the later parts of the pipeline sooner.<\/p>\n<h2>Event Hubs<\/h2>\n<p>Azure Event Hubs, a Platform-as-a-Service offering, is a big data streaming platform and event ingestion service. Highly scalable and reliable, it can receive and process millions of events per second with low latency.<\/p>\n<p>Event Hubs can be used for a number of different scenarios, such as:<\/p>\n<ul>\n<li>Anomaly detection<\/li>\n<li>Device telemetry streaming<\/li>\n<li>Live dashboarding<\/li>\n<\/ul>\n<h2>Fake Data<\/h2>\n<p>Not every developer has the time to generate a tool to populate their databases or ingestion services. This is where fake data, otherwise known as test or dummy data comes in. Fake data serves to exist where real data is normally present, acting as a placeholder for testing purposes in a non-production environment.<\/p>\n<h2>JSON-Faker-Schema<\/h2>\n<p>Event Hub Data Generator (EHDG) is heavily based on the work of JSON-Schema-Faker&#8217;s JavaScript library. JSON-Faker-Schema can generate realistic fake data in JSON format for many areas, including people, address, finance, and company etc. The data generated will be based on the schema provided by the user. JSON-Faker-Schema adheres to the JSON Schema, which is a standard for a valid JSON file.<\/p>\n<p>A very simple example of valid schema;<\/p>\n<pre>{\n  <span style=\"color: #ff0000\">\"firstName\"<\/span>: {\n    <span style=\"color: #ff0000\">\"type\"<\/span>: <span style=\"color: #ff0000\">\"string\"<\/span>,\n    <span style=\"color: #ff0000\">\"faker\"<\/span>: <span style=\"color: #ff0000\">\"name.firstName\"<\/span>\n  }\n}<\/pre>\n<p>Given that Event Hubs Data Generator makes use of a library called JSON-Faker-Schema &#8211; it would be wise to refer to the documentation provided on their <a href=\"https:\/\/github.com\https://www.microsoft.com/json-schema-faker\https://www.microsoft.com/json-schema-faker\/\">Github<\/a> when you&#8217;re getting started. Their website includes a <a href=\"https:\/\https://www.microsoft.com/json-schema-faker.js.org\/\" target=\"_blank\" rel=\"noopener noreferrer\">playground environment<\/a> that is especially useful when testing whether your schema is valid.<\/p>\n<h2>Providers<\/h2>\n<p>The concept of providers is an important one in JSON-Faker-Schema &#8211; providers are the generator attributes that are packaged together. For instance, generator attributes such as firstName, lastName are packaged into a Provider called Person. Providers can be thought of as logical groupings of attributes. A complete and exhaustive list of providers can be found on the <a href=\"https:\/\/github.com\/Marak\/faker.js\/wiki\" target=\"_blank\" rel=\"noopener noreferrer\">Faker Github Wiki<\/a>.<\/p>\n<h2>How EHDG Works<\/h2>\n<p>This tool is web based, and as such, the implementation differs slightly from the documentation in the Github repository for the library we are using. We are using HTML forms (index.html) to pass data into the JavaScript file (index.js) which includes the Faker logic.<\/p>\n<p>On the HTML page, index.html, the textbox field &#8216;method&#8217; you are to insert a valid schema:<\/p>\n<pre>{\n  <span style=\"color: #ff0000\">\"firstName\"<\/span>: {\n    <span style=\"color: #ff0000\">\"type\"<\/span>: <span style=\"color: #ff0000\">\"string\"<\/span>,\n    <span style=\"color: #ff0000\">\"faker\"<\/span>: <span style=\"color: #ff0000\">\"name.firstName\"<\/span>\n  }\n}<\/pre>\n<p>In our index.js file we can pass these values from the form using the Express library. Here&#8217;s an example of how it works:<\/p>\n<pre><span style=\"color: #cc99ff\">var<\/span> <span style=\"color: #800080\">method<\/span> <span style=\"color: #800000\">=<\/span> req.<span style=\"color: #808080\">body<\/span>.<span style=\"color: #808080\">method<\/span>;<\/pre>\n<p>Once we have the form values we can then perform our Faker logic:<\/p>\n<pre><span style=\"color: #cc99ff\">var<\/span> <span style=\"color: #800080\">dataJSON<\/span> <span style=\"color: #800000\">=<\/span> JSON.<span style=\"color: #808080\">parse<\/span>(method);\n        <span style=\"color: #cc99ff\">var<\/span> <span style=\"color: #800080\">data<\/span> <span style=\"color: #800000\">=<\/span> fakerSchema.<span style=\"color: #808080\">generate<\/span>(dataJSON);\n        <span style=\"color: #cc99ff\">const<\/span> <span style=\"color: #800080\">eventData<\/span> <span style=\"color: #800000\">=<\/span> {<span style=\"color: #808080\">body<\/span>: data};\n        client.<span style=\"color: #808080\">send<\/span>(eventData);<\/pre>\n<p>Outputting &#8216;eventData&#8217; to console would look like this:<\/p>\n<pre>{\n  <span style=\"color: #ff0000\">\"firstName\"<\/span>: <span style=\"color: #ff0000\">\"Oswald\"<\/span>\n}<\/pre>\n<h2>Using EHDG<\/h2>\n<p>Instructions to set up this tool to run locally can be found <a href=\"https:\/\/github.com\/JalalUddin7\/EventHubDataGenerator\/blob\/master\/documentation\/Deploying%20EHDG%20(locally).md\" target=\"_blank\" rel=\"noopener noreferrer\">here<\/a>.<\/p>\n<p>Below is a short, simple guide on how to use the tool. A more detailed guide on the form is available <a href=\"https:\/\/github.com\/JalalUddin7\/EventHubDataGenerator\/blob\/master\/documentation\/Getting%20Started.md\" target=\"_blank\" rel=\"noopener noreferrer\">here<\/a>.<\/p>\n<ol start=\"\">\n<li>Set up an Event Hub through the Azure Portal<\/li>\n<li>Go into the Event Hub&#8217;s SAS settings and copy the Event Hub&#8217;s Connection String and Namepace.<\/li>\n<li>Paste those aforementioned values into the web UI into the respective fields.<\/li>\n<li>Specify number of messages you want produced.<\/li>\n<li>Input a valid schema.<\/li>\n<li>Press submit.<\/li>\n<li>Check your Event Hub&#8217;s monitor to see incoming messages.<\/li>\n<\/ol>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"attachment-full size-full webp-format aligncenter\" src=\"https:\/\/www.microsoft.com\/en-us\/industry\/blog\/wp-content\/uploads\/sites\/22\/2020\/02\/Picture3.png\" alt=\"\" width=\"875\" height=\"737\" data-orig-srcset=\"https:\/\/www.microsoft.com\/en-us\/industry\/blog\/wp-content\/uploads\/sites\/22\/2020\/02\/Picture3.png 875w, https:\/\/www.microsoft.com\/en-us\/industry\/blog\/wp-content\/uploads\/sites\/22\/2020\/02\/Picture3-300x253.png 300w, https:\/\/www.microsoft.com\/en-us\/industry\/blog\/wp-content\/uploads\/sites\/22\/2020\/02\/Picture3-768x647.png 768w, https:\/\/www.microsoft.com\/en-us\/industry\/blog\/wp-content\/uploads\/sites\/22\/2020\/02\/Picture3-297x250.png 297w, https:\/\/www.microsoft.com\/en-us\/industry\/blog\/wp-content\/uploads\/sites\/22\/2020\/02\/Picture3-330x278.png 330w, https:\/\/www.microsoft.com\/en-us\/industry\/blog\/wp-content\/uploads\/sites\/22\/2020\/02\/Picture3-800x674.png 800w, https:\/\/www.microsoft.com\/en-us\/industry\/blog\/wp-content\/uploads\/sites\/22\/2020\/02\/Picture3-400x337.png 400w\" data-orig-src=\"https:\/\/www.microsoft.com\/en-us\/industry\/blog\/wp-content\/uploads\/sites\/22\/2020\/02\/Picture3.png\" \/><\/p>\n<h2>Going Forward<\/h2>\n<p>The possibilities are endless. As mentioned earlier, you can use Event Hub for live dashboarding, and anomaly detection amongst other things. For instance, you can set up a pipeline that includes the following: Event Hub, Stream Analytics and PowerBI and set data alerts in the PowerBI dashboard, which is effectively a way to carry out anomaly detection.<\/p>\n<p>If there are any further questions, please take a look at the <a href=\"https:\/\/github.com\/JalalUddin7\/EventHubDataGenerator\" target=\"_blank\" rel=\"noopener noreferrer\">Github<\/a>.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Event Hub Data Generator (EHDG) is a tool which generates realistic fake data based on a provided schema and sends it to Azure Event Hubs. The purpose is to remove the pain of initial set up that is faced by many developers.<\/p>\n","protected":false},"author":430,"featured_media":25758,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"ep_exclude_from_search":false,"_classifai_error":"","footnotes":""},"categories":[594],"post_tag":[519],"content-type":[],"coauthors":[1128],"class_list":["post-25623","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-technetuk","tag-technet-uk"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v23.9 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Introducing Event Hubs Data Generator - Microsoft Industry Blogs - United Kingdom<\/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.microsoft.com\/en-gb\/industry\/blog\/technetuk\/2020\/02\/20\/introducing-event-hubs-data-generator\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Introducing Event Hubs Data Generator - Microsoft Industry Blogs - United Kingdom\" \/>\n<meta property=\"og:description\" content=\"Event Hub Data Generator (EHDG) is a tool which generates realistic fake data based on a provided schema and sends it to Azure Event Hubs. 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