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@ -27,7 +27,7 @@ For example:
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The debugger needs to remember the session which is being debugged The permission manager has a testability function, where it can be set to emulate that it’s running as a SaaS (Software As A Service – the cloud) platform, even when the tests run in a “on-premise” local lab.">
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<meta property="og:type" content="article">
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<meta property="og:url" content="https://alguidelines.dev/docs/navpatterns/patterns/singleton/singleton-codeunit/"><meta property="og:image" content="https://alguidelines.dev/images/og-image-fission.png"><meta property="article:section" content="docs">
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<meta property="article:modified_time" content="2022-02-20T13:18:49+01:00"><meta property="og:site_name" content="alguidelines.dev - Business Central Design Patterns">
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<meta property="article:modified_time" content="2022-02-24T14:45:35+01:00"><meta property="og:site_name" content="alguidelines.dev - Business Central Design Patterns">
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<meta itemprop=name content="Singleton Codeunit">
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<meta itemprop=description content="By Bogdana Botez at Microsoft Development Center Copenhagen
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@ -35,9 +35,9 @@ Problem: In some situations, global state needs to be preserved at runtime throu
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There are functionality areas in NAV where centralized application management code is needed, like for example managing permissions, notifications, the debugger etc. State needs to be preserved across calls to the management codeunit.
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For example:
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The debugger needs to remember the session which is being debugged The permission manager has a testability function, where it can be set to emulate that it’s running as a SaaS (Software As A Service – the cloud) platform, even when the tests run in a “on-premise” local lab.">
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<meta itemprop=dateModified content="2022-02-20T13:18:49+01:00">
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<meta itemprop=dateModified content="2022-02-24T14:45:35+01:00">
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<meta name=twitter:title content="Singleton Codeunit">
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<meta name=twitter:description content="By Bogdana Botez at Microsoft Development Center Copenhagen
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@ -75,7 +75,7 @@ For example:
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@ -86,7 +86,7 @@ For example:
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<input type=search class="form-control td-search-input" placeholder=" Search this site…" aria-label="Search this site…" autocomplete=off data-offline-search-index-json-src=/offline-search-index.2b0c36478a8660f3dec37e0c539508bc.json data-offline-search-base-href=/ data-offline-search-max-results=10>
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@ -157,7 +157,7 @@ For example:
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<a href=/docs/navpatterns/ class="align-left pl-0 td-sidebar-link td-sidebar-link__section" id=m-docsnavpatterns><span>NAV Patterns Archive</span></a>
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<ul class="ul-2 foldable">
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<li class="td-sidebar-nav__section-title td-sidebar-nav__section with-child active-path" id=m-docsnavpatternspatterns-li>
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<a href=/docs/navpatterns/patterns/ class="align-left pl-0 td-sidebar-link td-sidebar-link__section" id=m-docsnavpatternspatterns><span>Patterns</span></a>
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<a href=/docs/navpatterns/patterns/ class="align-left pl-0 td-sidebar-link td-sidebar-link__section" id=m-docsnavpatternspatterns><span>1. Patterns</span></a>
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@ -514,19 +514,21 @@ For example:
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<h5 class=taxonomy-title>Categories</h5>
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<li><a class=taxonomy-term href=https://alguidelines.dev/categories/archived-pattern/ data-taxonomy-term=archived-pattern><span class=taxonomy-label>Archived Pattern</span><span class=taxonomy-count>1</span></a></li>
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<li><a class=taxonomy-term href=https://alguidelines.dev/categories/best-practice/ data-taxonomy-term=best-practice><span class=taxonomy-label>Best Practice</span><span class=taxonomy-count>21</span></a></li>
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<li><a class=taxonomy-term href=https://alguidelines.dev/categories/pattern/ data-taxonomy-term=pattern><span class=taxonomy-label>Pattern</span><span class=taxonomy-count>4</span></a></li>
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<li><a class=taxonomy-term href=https://alguidelines.dev/categories/best-practice/ data-taxonomy-term=best-practice><span class=taxonomy-label>Best Practice</span><span class=taxonomy-count>84</span></a></li>
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</div>
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</aside>
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@ -540,7 +542,7 @@ For example:
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<a href=https://alguidelines.dev/docs/navpatterns/>NAV Patterns Archive</a>
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</li>
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<li class=breadcrumb-item>
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<a href=https://alguidelines.dev/docs/navpatterns/patterns/>Patterns</a>
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<a href=https://alguidelines.dev/docs/navpatterns/patterns/>1. Patterns</a>
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</li>
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<li class=breadcrumb-item>
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<a href=https://alguidelines.dev/docs/navpatterns/patterns/singleton/>Singleton</a>
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@ -553,6 +555,18 @@ For example:
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<div class=td-content>
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<h1>Singleton Codeunit</h1>
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<header class=article-meta>
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<div class="taxonomy taxonomy-terms-article taxo-tags">
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<h5 class=taxonomy-title>Tags:</h5>
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<ul class=taxonomy-terms>
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<li><a class=taxonomy-term href=https://alguidelines.dev/tags/c/al/ data-taxonomy-term=c/al><span class=taxonomy-label>C/AL</span></a></li>
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</ul>
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<h5 class=taxonomy-title>Categories:</h5>
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<ul class=taxonomy-terms>
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<li><a class=taxonomy-term href=https://alguidelines.dev/categories/pattern/ data-taxonomy-term=pattern><span class=taxonomy-label>Pattern</span></a></li>
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</ul>
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</div>
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</header>
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<p><em>By Bogdana Botez at Microsoft Development Center Copenhagen</em></p>
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<p><a href=Singleton-Codeunit.png><img src=Singleton-Codeunit.png alt=" "></a></p>
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@ -617,7 +631,7 @@ For example:
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</ul>
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<p><strong>Note:</strong> while the object-oriented <strong>Singleton</strong> pattern can restrict the number of instantiations of the singleton to an integer n > 0, in Dynamics NAV the <strong>Singleton Codeunit</strong> can only have n=1.</p>
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<div class="text-muted mt-5 pt-3 border-top">
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Last modified February 20, 2022: <a href=https://github.com/microsoft/alguidelines/commit/cceb0c945e0383599f497350ca254d5755edda65>Restructure for Docsy theme (cceb0c94)</a>
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Last modified February 24, 2022: <a href=https://github.com/microsoft/alguidelines/commit/5ee0436639455a35835c5ce88241d3fad662ee06>Added tags & categories + cleanup (5ee04366)</a>
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</main>
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