| <!doctype html> |
| <html lang="en" dir="ltr" class="blog-wrapper blog-post-page plugin-blog plugin-id-default" data-has-hydrated="false"> |
| <head> |
| <meta charset="UTF-8"> |
| <meta name="generator" content="Docusaurus v3.1.1"> |
| <title data-rh="true">Apache Kafka meets Wayang - Part 1 | Apache Wayang™</title><meta data-rh="true" name="viewport" content="width=device-width,initial-scale=1"><meta data-rh="true" name="twitter:card" content="summary_large_image"><meta data-rh="true" property="og:url" content="https://wayang.apache.org/blog/kafka-meets-wayang-1"><meta data-rh="true" property="og:locale" content="en"><meta data-rh="true" name="docusaurus_locale" content="en"><meta data-rh="true" name="docusaurus_tag" content="default"><meta data-rh="true" name="docsearch:language" content="en"><meta data-rh="true" name="docsearch:docusaurus_tag" content="default"><meta data-rh="true" property="og:title" content="Apache Kafka meets Wayang - Part 1 | Apache Wayang™"><meta data-rh="true" name="description" content="Intro"><meta data-rh="true" property="og:description" content="Intro"><meta data-rh="true" property="og:type" content="article"><meta data-rh="true" property="article:published_time" content="2024-03-05T00:00:00.000Z"><meta data-rh="true" property="article:author" content="https://github.com/kamir"><meta data-rh="true" property="article:tag" content="wayang,kafka,cross organization data collaboration"><link data-rh="true" rel="icon" href="/img/wayang-logo.jpg"><link data-rh="true" rel="canonical" href="https://wayang.apache.org/blog/kafka-meets-wayang-1"><link data-rh="true" rel="alternate" href="https://wayang.apache.org/blog/kafka-meets-wayang-1" hreflang="en"><link data-rh="true" rel="alternate" href="https://wayang.apache.org/blog/kafka-meets-wayang-1" hreflang="x-default"><link rel="alternate" type="application/rss+xml" href="/blog/rss.xml" title="Apache Wayang™ RSS Feed"> |
| <link rel="alternate" type="application/atom+xml" href="/blog/atom.xml" title="Apache Wayang™ Atom Feed"><link rel="stylesheet" href="/assets/css/styles.af2ccd7c.css"> |
| <script src="/assets/js/runtime~main.de98056e.js" defer="defer"></script> |
| <script src="/assets/js/main.0902b4c3.js" defer="defer"></script> |
| </head> |
| <body class="navigation-with-keyboard"> |
| <script>!function(){function t(t){document.documentElement.setAttribute("data-theme",t)}var e=function(){try{return new URLSearchParams(window.location.search).get("docusaurus-theme")}catch(t){}}()||function(){try{return localStorage.getItem("theme")}catch(t){}}();t(null!==e?e:"light")}(),function(){try{const a=new URLSearchParams(window.location.search).entries();for(var[t,e]of a)if(t.startsWith("docusaurus-data-")){var n=t.replace("docusaurus-data-","data-");document.documentElement.setAttribute(n,e)}}catch(t){}}(),document.documentElement.setAttribute("data-announcement-bar-initially-dismissed",function(){try{return"true"===localStorage.getItem("docusaurus.announcement.dismiss")}catch(t){}return!1}())</script><div id="__docusaurus"><div role="region" aria-label="Skip to main content"><a class="skipToContent_fXgn" href="#__docusaurus_skipToContent_fallback">Skip to main content</a></div><div class="announcementBar_mb4j" style="background-color:#fafbfc;color:#091E42" role="banner"><div class="announcementBarPlaceholder_vyr4"></div><div class="content_knG7 announcementBarContent_xLdY">⭐️ If you like Apache Wayang, give it a star on <a target="_blank" href="https://github.com/apache/incubator-wayang">GitHub</a>! ⭐ </div><button type="button" aria-label="Close" class="clean-btn close closeButton_CVFx announcementBarClose_gvF7"><svg viewBox="0 0 15 15" width="14" height="14"><g stroke="currentColor" stroke-width="3.1"><path d="M.75.75l13.5 13.5M14.25.75L.75 14.25"></path></g></svg></button></div><nav aria-label="Main" class="navbar navbar--fixed-top"><div class="navbar__inner"><div class="navbar__items"><button aria-label="Toggle navigation bar" aria-expanded="false" class="navbar__toggle clean-btn" type="button"><svg width="30" height="30" viewBox="0 0 30 30" aria-hidden="true"><path stroke="currentColor" stroke-linecap="round" stroke-miterlimit="10" stroke-width="2" d="M4 7h22M4 15h22M4 23h22"></path></svg></button><a class="navbar__brand" href="/"><div class="navbar__logo"><img src="/img/wayang.png" alt="Wayang Logo" class="themedComponent_mlkZ themedComponent--light_NVdE"><img src="/img/wayang.png" alt="Wayang Logo" class="themedComponent_mlkZ themedComponent--dark_xIcU"></div><b class="navbar__title text--truncate"></b></a></div><div class="navbar__items navbar__items--right"><a class="navbar__item navbar__link" href="/docs/start/download">Download</a><a class="navbar__item navbar__link" href="/docs/introduction/about">About</a><a class="navbar__item navbar__link" href="/docs/guide/installation">Developers</a><div class="navbar__item dropdown dropdown--hoverable dropdown--right"><a href="#" aria-haspopup="true" aria-expanded="false" role="button" class="navbar__link">Community</a><ul class="dropdown__menu"><li><a aria-current="page" class="dropdown__link dropdown__link--active" href="/blog/">Blog</a></li><li><a class="dropdown__link" href="/docs/community/mailinglist">Project</a></li></ul></div><div class="navbar__item dropdown dropdown--hoverable dropdown--right"><a href="#" aria-haspopup="true" aria-expanded="false" role="button" class="navbar__link">ASF</a><ul class="dropdown__menu"><li><a href="https://www.apache.org/" target="_blank" rel="noopener noreferrer" class="dropdown__link">Foundation</a></li><li><a href="https://www.apache.org/licenses/" target="_blank" rel="noopener noreferrer" class="dropdown__link">License</a></li><li><a href="https://www.apache.org/events/current-event.html" target="_blank" rel="noopener noreferrer" class="dropdown__link">Events</a></li><li><a href="https://privacy.apache.org/policies/privacy-policy-public.html" target="_blank" rel="noopener noreferrer" class="dropdown__link">Privacy</a></li><li><a href="https://www.apache.org/security/" target="_blank" rel="noopener noreferrer" class="dropdown__link">Security</a></li><li><a href="https://www.apache.org/foundation/sponsorship.html" target="_blank" rel="noopener noreferrer" class="dropdown__link">Sponsorship</a></li><li><a href="https://www.apache.org/foundation/thanks.html" target="_blank" rel="noopener noreferrer" class="dropdown__link">Thanks</a></li><li><a href="https://www.apache.org/foundation/policies/conduct.html" target="_blank" rel="noopener noreferrer" class="dropdown__link">Code of Conduct</a></li></ul></div><a href="https://github.com/apache/incubator-wayang" target="_blank" rel="noopener noreferrer" class="navbar__item navbar__link header-github-link" aria-label="GitHub repository"></a><div class="toggle_vylO colorModeToggle_DEke"><button class="clean-btn toggleButton_gllP toggleButtonDisabled_aARS" type="button" disabled="" title="Switch between dark and light mode (currently light mode)" aria-label="Switch between dark and light mode (currently light mode)" aria-live="polite"><svg viewBox="0 0 24 24" width="24" height="24" class="lightToggleIcon_pyhR"><path fill="currentColor" d="M12,9c1.65,0,3,1.35,3,3s-1.35,3-3,3s-3-1.35-3-3S10.35,9,12,9 M12,7c-2.76,0-5,2.24-5,5s2.24,5,5,5s5-2.24,5-5 S14.76,7,12,7L12,7z M2,13l2,0c0.55,0,1-0.45,1-1s-0.45-1-1-1l-2,0c-0.55,0-1,0.45-1,1S1.45,13,2,13z M20,13l2,0c0.55,0,1-0.45,1-1 s-0.45-1-1-1l-2,0c-0.55,0-1,0.45-1,1S19.45,13,20,13z M11,2v2c0,0.55,0.45,1,1,1s1-0.45,1-1V2c0-0.55-0.45-1-1-1S11,1.45,11,2z M11,20v2c0,0.55,0.45,1,1,1s1-0.45,1-1v-2c0-0.55-0.45-1-1-1C11.45,19,11,19.45,11,20z M5.99,4.58c-0.39-0.39-1.03-0.39-1.41,0 c-0.39,0.39-0.39,1.03,0,1.41l1.06,1.06c0.39,0.39,1.03,0.39,1.41,0s0.39-1.03,0-1.41L5.99,4.58z M18.36,16.95 c-0.39-0.39-1.03-0.39-1.41,0c-0.39,0.39-0.39,1.03,0,1.41l1.06,1.06c0.39,0.39,1.03,0.39,1.41,0c0.39-0.39,0.39-1.03,0-1.41 L18.36,16.95z M19.42,5.99c0.39-0.39,0.39-1.03,0-1.41c-0.39-0.39-1.03-0.39-1.41,0l-1.06,1.06c-0.39,0.39-0.39,1.03,0,1.41 s1.03,0.39,1.41,0L19.42,5.99z M7.05,18.36c0.39-0.39,0.39-1.03,0-1.41c-0.39-0.39-1.03-0.39-1.41,0l-1.06,1.06 c-0.39,0.39-0.39,1.03,0,1.41s1.03,0.39,1.41,0L7.05,18.36z"></path></svg><svg viewBox="0 0 24 24" width="24" height="24" class="darkToggleIcon_wfgR"><path fill="currentColor" d="M9.37,5.51C9.19,6.15,9.1,6.82,9.1,7.5c0,4.08,3.32,7.4,7.4,7.4c0.68,0,1.35-0.09,1.99-0.27C17.45,17.19,14.93,19,12,19 c-3.86,0-7-3.14-7-7C5,9.07,6.81,6.55,9.37,5.51z M12,3c-4.97,0-9,4.03-9,9s4.03,9,9,9s9-4.03,9-9c0-0.46-0.04-0.92-0.1-1.36 c-0.98,1.37-2.58,2.26-4.4,2.26c-2.98,0-5.4-2.42-5.4-5.4c0-1.81,0.89-3.42,2.26-4.4C12.92,3.04,12.46,3,12,3L12,3z"></path></svg></button></div><div class="navbarSearchContainer_Bca1"><div class="navbar__search"><span aria-label="expand searchbar" role="button" class="search-icon" tabindex="0"></span><input id="search_input_react" type="search" placeholder="Loading..." aria-label="Search" class="navbar__search-input search-bar" disabled=""></div></div></div></div><div role="presentation" class="navbar-sidebar__backdrop"></div></nav><div id="__docusaurus_skipToContent_fallback" class="main-wrapper mainWrapper_z2l0"><div class="container margin-vert--lg"><div class="row"><aside class="col col--3"><nav class="sidebar_re4s thin-scrollbar" aria-label="Blog recent posts navigation"><div class="sidebarItemTitle_pO2u margin-bottom--md">All our posts</div><ul class="sidebarItemList_Yudw clean-list"><li class="sidebarItem__DBe"><a class="sidebarItemLink_mo7H" href="/blog/wayang-release-odysse">Apache Wayang Release Odysse</a></li><li class="sidebarItem__DBe"><a class="sidebarItemLink_mo7H" href="/blog/wayang-tensorflow">Integrating ML platforms in Wayang</a></li><li class="sidebarItem__DBe"><a class="sidebarItemLink_mo7H" href="/blog/wayang-federated-ai">Wayang and the Federated AI</a></li><li class="sidebarItem__DBe"><a class="sidebarItemLink_mo7H" href="/blog/wayang-python-api">Pywayang - Apache Wayang's Python API</a></li><li class="sidebarItem__DBe"><a class="sidebarItemLink_mo7H" href="/blog/kafka-meets-wayang-3">Apache Kafka meets Wayang - Part 3</a></li><li class="sidebarItem__DBe"><a class="sidebarItemLink_mo7H" href="/blog/wayang-vs-trino">Apache Wayang vs. Presto/Trino</a></li><li class="sidebarItem__DBe"><a class="sidebarItemLink_mo7H" href="/blog/kafka-meets-wayang-2">Apache Kafka meets Wayang - Part 2</a></li><li class="sidebarItem__DBe"><a aria-current="page" class="sidebarItemLink_mo7H sidebarItemLinkActive_I1ZP" href="/blog/kafka-meets-wayang-1">Apache Kafka meets Wayang - Part 1</a></li><li class="sidebarItem__DBe"><a class="sidebarItemLink_mo7H" href="/blog/website_update">Website updated</a></li></ul></nav></aside><main class="col col--7" itemscope="" itemtype="https://schema.org/Blog"><article itemprop="blogPost" itemscope="" itemtype="https://schema.org/BlogPosting"><meta itemprop="description" content="Intro"><header><h1 class="title_f1Hy" itemprop="headline">Apache Kafka meets Wayang - Part 1</h1><div class="container_mt6G margin-vert--md"><time datetime="2024-03-05T00:00:00.000Z" itemprop="datePublished">March 5, 2024</time> · <!-- -->4 min read</div><div class="margin-top--md margin-bottom--sm row"><div class="col col--6 authorCol_Hf19"><div class="avatar margin-bottom--sm"><a href="https://github.com/kamir" target="_blank" rel="noopener noreferrer" class="avatar__photo-link"><img class="avatar__photo" src="https://avatars.githubusercontent.com/u/1241122?v=4" alt="Mirko Kämpf" itemprop="image"></a><div class="avatar__intro" itemprop="author" itemscope="" itemtype="https://schema.org/Person"><div class="avatar__name"><a href="https://github.com/kamir" target="_blank" rel="noopener noreferrer" itemprop="url"><span itemprop="name">Mirko Kämpf</span></a></div><small class="avatar__subtitle" itemprop="description">(P)PMC Apache Wayang</small></div></div></div></div></header><div id="__blog-post-container" class="markdown" itemprop="articleBody"><h2 class="anchor anchorWithStickyNavbar_LWe7" id="intro">Intro<a href="#intro" class="hash-link" aria-label="Direct link to Intro" title="Direct link to Intro"></a></h2> |
| <p>This article is the first of a four part series about federated data analysis using Apache Wayang. |
| The first article starts with an introduction of a typical data colaboration scenario which will emerge in our digital future.</p> |
| <p>In part two and three we will share a summary of our Apache Kafka client implementation for Apache Wayang. |
| We started with the Java Platform (part 2) and the Apache Spark implementation follows (W.I.P.) in part three.</p> |
| <p>The use case behind this work is an imaginary data collaboration scenario. |
| We see this example and the demand for a solution already in many places. |
| For us this is motivation enough to propose a solution. |
| This would also allow us to do more local data processing, and businesses can stop moving data around the world, but rather care about data locality while they expose and share specific information to others by using data federation. |
| This reduces complexity of data management and cost dramatically.</p> |
| <p>For this purpose, we illustrate a cross organizational data sharing scenario from the finance sector soon. |
| This analysis pattern will also be relevant in the context of data analysis along supply chains, another typical example where data from many stakeholder together is needed but never managed in one place, for good reasons.</p> |
| <p>Data federation can help us to unlock the hidden value of all those isolated data lakes.</p> |
| <h2 class="anchor anchorWithStickyNavbar_LWe7" id="a-cross-organizational-data-sharing-scenario">A cross organizational data sharing scenario<a href="#a-cross-organizational-data-sharing-scenario" class="hash-link" aria-label="Direct link to A cross organizational data sharing scenario" title="Direct link to A cross organizational data sharing scenario"></a></h2> |
| <p>Our goal is the implementation of a cross organization decentralized data processing scenario, in which protected local data should be processed in combination with public data from public sources in a collaborative manner. |
| Instead of copying all data into a central data lake or a central data platform we decided to use federated analytics. |
| Apache Wayang is the tool we work with. |
| In our case, the public data is hosted on publicly available websites or data pods. |
| A client can use the HTTP(S) protocol to read the data which is given in a well defined format. |
| For simplicity we decided to use CSV format. |
| When we look into the data of each participant we have a different perspective.</p> |
| <p>Our processing procedure should calculate a particular metric on the <em>local data</em> of each participant. |
| An example of such a metric is the average spending of all users on a particular product category per month. |
| This can vary from partner to partner, hence, we want to be able to calculate a peer-group comparison so that each partner can see its own metric compared with a global average calculated from contributions by all partners. |
| Such a process requires global averaging and local averaging. |
| And due to governance constraints, we can’t bring all raw data together in one place.</p> |
| <p>Instead, we want to use Apache Wayang for this purpose. |
| We simplify the procedure and split it into two phases. |
| Phase one is the process, which allows each participant to calculate the local metrics. |
| This requires only local data. The second phase requires data from all collaborating partners. |
| The monthly sum and counter values per partner and category are needed in one place by all other parties. |
| Hence, the algorithm of the first phase stores the local results locally, and the contributions to the global results in an externally accessible Kafka topic. |
| We assume this is done by each of the partners.</p> |
| <p>Now we have a scenario, in which an Apache Wayang process must be able to read data from multiple Apache Kafka topics from multiple Apache Kafka clusters but finally writes into a single Kafka topic, which then can be accessed by all the participating clients.</p> |
| <p><img decoding="async" loading="lazy" alt="images/image-1.png" src="/assets/images/image-1-9cc35d5aea2b867d7e5759a96bd02334.png" width="904" height="550" class="img_ev3q"></p> |
| <p>The illustration shows the data flows in such a scenario. |
| Jobs with red border are executed by the participants in isolation within their own data processing environments. |
| But they share some of the data, using publicly accessible Kafka topics, marked by A. Job 4 is the Apache Wayang job in our focus: here we intent to read data from 3 different source systems, and write results into a fourth system (marked as B), which can be accesses by all participants again.</p> |
| <p>With this in mind we want to implement an Apache Wayang application which implements the illustrated <em>Job 4</em>. |
| Since as of today, there is now <em>KafkaSource</em> and <em>KafkaSink</em> available in Apache Wayang, an implementation of both will be our first step. |
| Our assumption is, that in the beginning, there won’t be much data.</p> |
| <p>Apache Spark is not required to cope with the load, but we expect, that in the future, a single Java application would not be able to handle our workload. |
| Hence, we want to utilize the Apache Wayang abstraction over multiple processing platforms, starting with Java. |
| Later, we want to switch to Apache Spark.</p></div><footer class="row docusaurus-mt-lg blogPostFooterDetailsFull_mRVl"><div class="col"><b>Tags:</b><ul class="tags_jXut padding--none margin-left--sm"><li class="tag_QGVx"><a class="tag_zVej tagRegular_sFm0" href="/blog/tags/wayang">wayang</a></li><li class="tag_QGVx"><a class="tag_zVej tagRegular_sFm0" href="/blog/tags/kafka">kafka</a></li><li class="tag_QGVx"><a class="tag_zVej tagRegular_sFm0" href="/blog/tags/cross-organization-data-collaboration">cross organization data collaboration</a></li></ul></div></footer></article><nav class="pagination-nav docusaurus-mt-lg" aria-label="Blog post page navigation"><a class="pagination-nav__link pagination-nav__link--prev" href="/blog/kafka-meets-wayang-2"><div class="pagination-nav__sublabel">Newer Post</div><div class="pagination-nav__label">Apache Kafka meets Wayang - Part 2</div></a><a class="pagination-nav__link pagination-nav__link--next" href="/blog/website_update"><div class="pagination-nav__sublabel">Older Post</div><div class="pagination-nav__label">Website updated</div></a></nav></main><div class="col col--2"><div class="tableOfContents_bqdL thin-scrollbar"><ul class="table-of-contents table-of-contents__left-border"><li><a href="#intro" class="table-of-contents__link toc-highlight">Intro</a></li><li><a href="#a-cross-organizational-data-sharing-scenario" class="table-of-contents__link toc-highlight">A cross organizational data sharing scenario</a></li></ul></div></div></div></div></div><footer class="footer footer--dark"><div class="container container-fluid"><div class="row footer__links"><div class="col footer__col"><div class="footer__title">Community</div><ul class="footer__items clean-list"><li class="footer__item"><a href="https://lists.apache.org/list.html?dev@wayang.apache.org" target="_blank" rel="noopener noreferrer" class="footer__link-item">Mailing list<svg width="13.5" height="13.5" aria-hidden="true" viewBox="0 0 24 24" class="iconExternalLink_nPIU"><path fill="currentColor" d="M21 13v10h-21v-19h12v2h-10v15h17v-8h2zm3-12h-10.988l4.035 4-6.977 7.07 2.828 2.828 6.977-7.07 4.125 4.172v-11z"></path></svg></a></li><li class="footer__item"><a href="https://www.youtube.com/@apachewayang" target="_blank" rel="noopener noreferrer" class="footer__link-item">YouTube<svg width="13.5" height="13.5" aria-hidden="true" viewBox="0 0 24 24" class="iconExternalLink_nPIU"><path fill="currentColor" d="M21 13v10h-21v-19h12v2h-10v15h17v-8h2zm3-12h-10.988l4.035 4-6.977 7.07 2.828 2.828 6.977-7.07 4.125 4.172v-11z"></path></svg></a></li><li class="footer__item"><a href="https://www.linkedin.com/company/apachewayang" target="_blank" rel="noopener noreferrer" class="footer__link-item">LinkedIn<svg width="13.5" height="13.5" aria-hidden="true" viewBox="0 0 24 24" class="iconExternalLink_nPIU"><path fill="currentColor" d="M21 13v10h-21v-19h12v2h-10v15h17v-8h2zm3-12h-10.988l4.035 4-6.977 7.07 2.828 2.828 6.977-7.07 4.125 4.172v-11z"></path></svg></a></li><li class="footer__item"><a href="https://www.reddit.com/r/ApacheWayang" target="_blank" rel="noopener noreferrer" class="footer__link-item">Reddit<svg width="13.5" height="13.5" aria-hidden="true" viewBox="0 0 24 24" class="iconExternalLink_nPIU"><path fill="currentColor" d="M21 13v10h-21v-19h12v2h-10v15h17v-8h2zm3-12h-10.988l4.035 4-6.977 7.07 2.828 2.828 6.977-7.07 4.125 4.172v-11z"></path></svg></a></li><li class="footer__item"><a href="https://twitter.com/apachewayang" target="_blank" rel="noopener noreferrer" class="footer__link-item">Twitter<svg width="13.5" height="13.5" aria-hidden="true" viewBox="0 0 24 24" class="iconExternalLink_nPIU"><path fill="currentColor" d="M21 13v10h-21v-19h12v2h-10v15h17v-8h2zm3-12h-10.988l4.035 4-6.977 7.07 2.828 2.828 6.977-7.07 4.125 4.172v-11z"></path></svg></a></li></ul></div><div class="col footer__col"><div class="footer__title">Documentation</div><ul class="footer__items clean-list"><li class="footer__item"><a class="footer__link-item" href="/docs/start/download">Install</a></li><li class="footer__item"><a class="footer__link-item" href="/docs/introduction/features">Features</a></li><li class="footer__item"><a class="footer__link-item" href="/docs/introduction/benchmark">Benchmark</a></li><li class="footer__item"><a class="footer__link-item" href="/docs/community/security">Security</a></li></ul></div><div class="col footer__col"><div class="footer__title">Repositories</div><ul class="footer__items clean-list"><li class="footer__item"><a href="https://github.com/apache/incubator-wayang" target="_blank" rel="noopener noreferrer" class="footer__link-item">Code<svg width="13.5" height="13.5" aria-hidden="true" viewBox="0 0 24 24" class="iconExternalLink_nPIU"><path fill="currentColor" d="M21 13v10h-21v-19h12v2h-10v15h17v-8h2zm3-12h-10.988l4.035 4-6.977 7.07 2.828 2.828 6.977-7.07 4.125 4.172v-11z"></path></svg></a></li><li class="footer__item"><a href="https://github.com/apache/incubator-wayang-website" target="_blank" rel="noopener noreferrer" class="footer__link-item">Website<svg width="13.5" height="13.5" aria-hidden="true" viewBox="0 0 24 24" class="iconExternalLink_nPIU"><path fill="currentColor" d="M21 13v10h-21v-19h12v2h-10v15h17v-8h2zm3-12h-10.988l4.035 4-6.977 7.07 2.828 2.828 6.977-7.07 4.125 4.172v-11z"></path></svg></a></li></ul></div></div><div class="footer__bottom text--center"><div class="margin-bottom--sm"><a href="https://www.apache.org/" rel="noopener noreferrer" class="footerLogoLink_BH7S"><img src="/img/asf-logo.svg" alt="ASF logo" class="footer__logo themedComponent_mlkZ themedComponent--light_NVdE" width="200"><img src="/img/asf-logo.svg" alt="ASF logo" class="footer__logo themedComponent_mlkZ themedComponent--dark_xIcU" width="200"></a></div><div class="footer__copyright"><div> |
| <p> |
| Copyright © 2025 The Apache Software Foundation, Licensed under the Apache License, Version 2.0. <br> |
| Apache Wayang, Wayang, Apache, the Apache feather logo, and the Apache Wayang project logo are either registered trademarks or trademarks of The Apache Software Foundation in the United States and other countries. All other marks mentioned may be trademarks or registered trademarks of their respective owners. |
| </p> |
| </div></div></div></div></footer></div> |
| </body> |
| </html> |
