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<head>
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<title>Event Bridge | alguidelines.dev - Business Central Design Patterns</title>
<meta name=description content="Created by waldo & Arend-Jan Kauffmann, Described by waldo
<title>Event Bridge | alguidelines.dev - Business Central Design Patterns</title><meta name=description content="Created by waldo & Arend-Jan Kauffmann, Described by waldo
Abstract
In the world of interfaces, it is important to preserve (certain) events over …">
<meta property="og:title" content="Event Bridge">
@ -44,8 +43,7 @@ Like in this example, we have an interface, to implement different ways for gett
<link href=/scss/main.min.84a617ff0c0265eb62b5cd2929c572f4ed37dc4907d0cf068be4eb2974f6d60f.css rel=stylesheet integrity>
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@ -57,36 +55,24 @@ Like in this example, we have an interface, to implement different ways for gett
<ul class="navbar-nav mt-2 mt-lg-0">
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<a class=nav-link href=/docs/><i class="fas fa-book"></i><span>Docs</span></a>
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<a class=nav-link href=https://discord.gg/4wbfNv3 target=_blank><i class="fab fa-discord"></i><span>Discord</span></a>
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<input type=search class="form-control td-search-input" placeholder="&#xf002; Search this site…" aria-label="Search this site…" autocomplete=off data-offline-search-index-json-src=/offline-search-index.c6558a635de208ea1007e79e444e323a.json data-offline-search-base-href=/ data-offline-search-max-results=10>
<button class="btn btn-link td-sidebar__toggle d-md-none p-0 ml-3 fas fa-bars" type=button data-toggle=collapse data-target=#td-section-nav aria-controls=td-docs-nav aria-expanded=false aria-label="Toggle section navigation">
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<div id=content-desktop></div>
<nav class="collapse td-sidebar-nav" id=td-section-nav>
</form></div><div id=content-desktop></div><nav class="collapse td-sidebar-nav" id=td-section-nav>
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<a href=/docs/ title="AL Guidelines" class="align-left pl-0 td-sidebar-link td-sidebar-link__section tree-root" id=m-docs><span>Docs</span></a>
@ -104,9 +90,9 @@ Like in this example, we have an interface, to implement different ways for gett
<a href=/docs/patterns/facade-pattern/ class="align-left pl-0 td-sidebar-link td-sidebar-link__page" id=m-docspatternsfacade-pattern><span>Façade</span></a>
</li><li class="td-sidebar-nav__section-title td-sidebar-nav__section without-child" id=m-docspatternsgeneric-method-pattern-li>
<a href=/docs/patterns/generic-method-pattern/ class="align-left pl-0 td-sidebar-link td-sidebar-link__page" id=m-docspatternsgeneric-method-pattern><span>Generic Method</span></a>
</li>
</ul>
</li><li class="td-sidebar-nav__section-title td-sidebar-nav__section with-child" id=m-docsbestpractices-li>
</li><li class="td-sidebar-nav__section-title td-sidebar-nav__section without-child" id=m-docspatternsno-series-li>
<a href=/docs/patterns/no-series/ class="align-left pl-0 td-sidebar-link td-sidebar-link__page" id=m-docspatternsno-series><span>No. Series</span></a>
</li></ul></li><li class="td-sidebar-nav__section-title td-sidebar-nav__section with-child" id=m-docsbestpractices-li>
<a href=/docs/bestpractices/ class="align-left pl-0 td-sidebar-link td-sidebar-link__section" id=m-docsbestpractices><span>Best Practices</span></a>
<ul class="ul-2 foldable">
<li class="td-sidebar-nav__section-title td-sidebar-nav__section without-child collapse" id=m-docsbestpracticesapi-page-li>
@ -153,9 +139,7 @@ Like in this example, we have an interface, to implement different ways for gett
<a href=/docs/bestpractices/variable-naming/ class="align-left pl-0 td-sidebar-link td-sidebar-link__page" id=m-docsbestpracticesvariable-naming><span>Variable Naming</span></a>
</li><li class="td-sidebar-nav__section-title td-sidebar-nav__section without-child collapse" id=m-docsbestpracticesvariables-declarations-order-li>
<a href=/docs/bestpractices/variables-declarations-order/ class="align-left pl-0 td-sidebar-link td-sidebar-link__page" id=m-docsbestpracticesvariables-declarations-order><span>Variables Declarations Order</span></a>
</li>
</ul>
</li><li class="td-sidebar-nav__section-title td-sidebar-nav__section with-child" id=m-docsnavpatterns-li>
</li></ul></li><li class="td-sidebar-nav__section-title td-sidebar-nav__section with-child" id=m-docsnavpatterns-li>
<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>
<ul class="ul-2 foldable">
<li class="td-sidebar-nav__section-title td-sidebar-nav__section with-child collapse" id=m-docsnavpatternspatterns-li>
@ -170,9 +154,7 @@ Like in this example, we have an interface, to implement different ways for gett
<ul class="ul-4 foldable">
<li class="td-sidebar-nav__section-title td-sidebar-nav__section without-child collapse" id=m-docsnavpatternspatternsblocked-entitydata-driven-blocked-entity-li>
<a href=/docs/navpatterns/patterns/blocked-entity/data-driven-blocked-entity/ class="align-left pl-0 td-sidebar-link td-sidebar-link__page" id=m-docsnavpatternspatternsblocked-entitydata-driven-blocked-entity><span>Data Driven Blocked Entity</span></a>
</li>
</ul>
</li><li class="td-sidebar-nav__section-title td-sidebar-nav__section without-child collapse" id=m-docsnavpatternspatternscached-web-service-calls-li>
</li></ul></li><li class="td-sidebar-nav__section-title td-sidebar-nav__section without-child collapse" id=m-docsnavpatternspatternscached-web-service-calls-li>
<a href=/docs/navpatterns/patterns/cached-web-service-calls/ class="align-left pl-0 td-sidebar-link td-sidebar-link__page" id=m-docsnavpatternspatternscached-web-service-calls><span>Cached Web Server Calls</span></a>
</li><li class="td-sidebar-nav__section-title td-sidebar-nav__section without-child collapse" id=m-docsnavpatternspatternsconditional-cascading-update-li>
<a href=/docs/navpatterns/patterns/conditional-cascading-update/ class="align-left pl-0 td-sidebar-link td-sidebar-link__page" id=m-docsnavpatternspatternsconditional-cascading-update><span>Conditional Cascading Update</span></a>
@ -227,9 +209,7 @@ Like in this example, we have an interface, to implement different ways for gett
<ul class="ul-4 foldable">
<li class="td-sidebar-nav__section-title td-sidebar-nav__section without-child collapse" id=m-docsnavpatternspatternsnet-exception-handling-in-caltryfunction-net-exception-handling-in-cal-li>
<a href=/docs/navpatterns/patterns/net-exception-handling-in-cal/tryfunction-net-exception-handling-in-cal/ class="align-left pl-0 td-sidebar-link td-sidebar-link__page" id=m-docsnavpatternspatternsnet-exception-handling-in-caltryfunction-net-exception-handling-in-cal><span>TryFunction NET Exception Handling in CAL</span></a>
</li>
</ul>
</li><li class="td-sidebar-nav__section-title td-sidebar-nav__section without-child collapse" id=m-docsnavpatternspatternsno-series-li>
</li></ul></li><li class="td-sidebar-nav__section-title td-sidebar-nav__section without-child collapse" id=m-docsnavpatternspatternsno-series-li>
<a href=/docs/navpatterns/patterns/no-series/ class="align-left pl-0 td-sidebar-link td-sidebar-link__page" id=m-docsnavpatternspatternsno-series><span>No Series</span></a>
</li><li class="td-sidebar-nav__section-title td-sidebar-nav__section with-child collapse" id=m-docsnavpatternspatternsnotifications-li>
<a href=/docs/navpatterns/patterns/notifications/ class="align-left pl-0 td-sidebar-link td-sidebar-link__section" id=m-docsnavpatternspatternsnotifications><span>Notifications</span></a>
@ -238,9 +218,7 @@ Like in this example, we have an interface, to implement different ways for gett
<a href=/docs/navpatterns/patterns/notifications/in-context-notifications/ class="align-left pl-0 td-sidebar-link td-sidebar-link__page" id=m-docsnavpatternspatternsnotificationsin-context-notifications><span>In-context Notifications</span></a>
</li><li class="td-sidebar-nav__section-title td-sidebar-nav__section without-child collapse" id=m-docsnavpatternspatternsnotificationsnotification-lifecycle-management-pattern-li>
<a href=/docs/navpatterns/patterns/notifications/notification-lifecycle-management-pattern/ class="align-left pl-0 td-sidebar-link td-sidebar-link__page" id=m-docsnavpatternspatternsnotificationsnotification-lifecycle-management-pattern><span>Notification Lifecycle Management Pattern</span></a>
</li>
</ul>
</li><li class="td-sidebar-nav__section-title td-sidebar-nav__section without-child collapse" id=m-docsnavpatternspatternsobserver-li>
</li></ul></li><li class="td-sidebar-nav__section-title td-sidebar-nav__section without-child collapse" id=m-docsnavpatternspatternsobserver-li>
<a href=/docs/navpatterns/patterns/observer/ class="align-left pl-0 td-sidebar-link td-sidebar-link__page" id=m-docsnavpatternspatternsobserver><span>Observer</span></a>
</li><li class="td-sidebar-nav__section-title td-sidebar-nav__section without-child collapse" id=m-docsnavpatternspatternsposting-routine-select-behavior-li>
<a href=/docs/navpatterns/patterns/posting-routine-select-behavior/ class="align-left pl-0 td-sidebar-link td-sidebar-link__page" id=m-docsnavpatternspatternsposting-routine-select-behavior><span>Posting Routine - Select Behavior</span></a>
@ -255,9 +233,7 @@ Like in this example, we have an interface, to implement different ways for gett
<a href=/docs/navpatterns/patterns/queries/use-queries-to-detect-duplicate-records/ class="align-left pl-0 td-sidebar-link td-sidebar-link__page" id=m-docsnavpatternspatternsqueriesuse-queries-to-detect-duplicate-records><span>Use Queries to Detect Duplicate Records</span></a>
</li><li class="td-sidebar-nav__section-title td-sidebar-nav__section without-child collapse" id=m-docsnavpatternspatternsqueriesuse-queries-to-replace-nested-loops-li>
<a href=/docs/navpatterns/patterns/queries/use-queries-to-replace-nested-loops/ class="align-left pl-0 td-sidebar-link td-sidebar-link__page" id=m-docsnavpatternspatternsqueriesuse-queries-to-replace-nested-loops><span>Use Queries to Replace Nested Loops</span></a>
</li>
</ul>
</li><li class="td-sidebar-nav__section-title td-sidebar-nav__section without-child collapse" id=m-docsnavpatternspatternsread-once-initialization-and-validation-li>
</li></ul></li><li class="td-sidebar-nav__section-title td-sidebar-nav__section without-child collapse" id=m-docsnavpatternspatternsread-once-initialization-and-validation-li>
<a href=/docs/navpatterns/patterns/read-once-initialization-and-validation/ class="align-left pl-0 td-sidebar-link td-sidebar-link__page" id=m-docsnavpatternspatternsread-once-initialization-and-validation><span>Read-once Initialization and Validation</span></a>
</li><li class="td-sidebar-nav__section-title td-sidebar-nav__section without-child collapse" id=m-docsnavpatternspatternsreleased-entity-li>
<a href=/docs/navpatterns/patterns/released-entity/ class="align-left pl-0 td-sidebar-link td-sidebar-link__page" id=m-docsnavpatternspatternsreleased-entity><span>Released Entity</span></a>
@ -276,9 +252,7 @@ Like in this example, we have an interface, to implement different ways for gett
<a href=/docs/navpatterns/patterns/security/4-masked-text/ class="align-left pl-0 td-sidebar-link td-sidebar-link__page" id=m-docsnavpatternspatternssecurity4-masked-text><span>Masked Text</span></a>
</li><li class="td-sidebar-nav__section-title td-sidebar-nav__section without-child collapse" id=m-docsnavpatternspatternssecurity5-ssl-in-nav-li>
<a href=/docs/navpatterns/patterns/security/5-ssl-in-nav/ class="align-left pl-0 td-sidebar-link td-sidebar-link__page" id=m-docsnavpatternspatternssecurity5-ssl-in-nav><span>SSL in NAV</span></a>
</li>
</ul>
</li><li class="td-sidebar-nav__section-title td-sidebar-nav__section without-child collapse" id=m-docsnavpatternspatternssetup-specificity-fallback-li>
</li></ul></li><li class="td-sidebar-nav__section-title td-sidebar-nav__section without-child collapse" id=m-docsnavpatternspatternssetup-specificity-fallback-li>
<a href=/docs/navpatterns/patterns/setup-specificity-fallback/ class="align-left pl-0 td-sidebar-link td-sidebar-link__page" id=m-docsnavpatternspatternssetup-specificity-fallback><span>Setup Specificity Fallback</span></a>
</li><li class="td-sidebar-nav__section-title td-sidebar-nav__section without-child collapse" id=m-docsnavpatternspatternssilent-file-upload-and-download-li>
<a href=/docs/navpatterns/patterns/silent-file-upload-and-download/ class="align-left pl-0 td-sidebar-link td-sidebar-link__page" id=m-docsnavpatternspatternssilent-file-upload-and-download><span>Silent File Upload and Download</span></a>
@ -294,11 +268,7 @@ Like in this example, we have an interface, to implement different ways for gett
<a href=/docs/navpatterns/patterns/singleton/singleton-table/cue-table/ class="align-left pl-0 td-sidebar-link td-sidebar-link__page" id=m-docsnavpatternspatternssingletonsingleton-tablecue-table><span>Cue Table</span></a>
</li><li class="td-sidebar-nav__section-title td-sidebar-nav__section without-child collapse" id=m-docsnavpatternspatternssingletonsingleton-tablesetup-table-li>
<a href=/docs/navpatterns/patterns/singleton/singleton-table/setup-table/ class="align-left pl-0 td-sidebar-link td-sidebar-link__page" id=m-docsnavpatternspatternssingletonsingleton-tablesetup-table><span>Setup Table</span></a>
</li>
</ul>
</li>
</ul>
</li><li class="td-sidebar-nav__section-title td-sidebar-nav__section without-child collapse" id=m-docsnavpatternspatternsstandard-journal-li>
</li></ul></li></ul></li><li class="td-sidebar-nav__section-title td-sidebar-nav__section without-child collapse" id=m-docsnavpatternspatternsstandard-journal-li>
<a href=/docs/navpatterns/patterns/standard-journal/ class="align-left pl-0 td-sidebar-link td-sidebar-link__page" id=m-docsnavpatternspatternsstandard-journal><span>Standard Journal</span></a>
</li><li class="td-sidebar-nav__section-title td-sidebar-nav__section without-child collapse" id=m-docsnavpatternspatternstemporary-dataset-report-li>
<a href=/docs/navpatterns/patterns/temporary-dataset-report/ class="align-left pl-0 td-sidebar-link td-sidebar-link__page" id=m-docsnavpatternspatternstemporary-dataset-report><span>Temporary Dataset Report</span></a>
@ -308,18 +278,14 @@ Like in this example, we have an interface, to implement different ways for gett
<a href=/docs/navpatterns/patterns/transfer-custom-fields/ class="align-left pl-0 td-sidebar-link td-sidebar-link__page" id=m-docsnavpatternspatternstransfer-custom-fields><span>Transfer Custom Fields</span></a>
</li><li class="td-sidebar-nav__section-title td-sidebar-nav__section without-child collapse" id=m-docsnavpatternspatternsvariant-facade-li>
<a href=/docs/navpatterns/patterns/variant-facade/ class="align-left pl-0 td-sidebar-link td-sidebar-link__page" id=m-docsnavpatternspatternsvariant-facade><span>Variant Facade</span></a>
</li>
</ul>
</li><li class="td-sidebar-nav__section-title td-sidebar-nav__section with-child collapse" id=m-docsnavpatterns2-anti-patterns-li>
</li></ul></li><li class="td-sidebar-nav__section-title td-sidebar-nav__section with-child collapse" id=m-docsnavpatterns2-anti-patterns-li>
<a href=/docs/navpatterns/2-anti-patterns/ class="align-left pl-0 td-sidebar-link td-sidebar-link__section" id=m-docsnavpatterns2-anti-patterns><span>2. Anti-Patterns</span></a>
<ul class="ul-3 foldable">
<li class="td-sidebar-nav__section-title td-sidebar-nav__section without-child collapse" id=m-docsnavpatterns2-anti-patternsnav-upgrade-li>
<a href=/docs/navpatterns/2-anti-patterns/nav-upgrade/ class="align-left pl-0 td-sidebar-link td-sidebar-link__page" id=m-docsnavpatterns2-anti-patternsnav-upgrade><span>Nav Upgrade</span></a>
</li><li class="td-sidebar-nav__section-title td-sidebar-nav__section without-child collapse" id=m-docsnavpatterns2-anti-patternsreusable-bugs-li>
<a href=/docs/navpatterns/2-anti-patterns/reusable-bugs/ class="align-left pl-0 td-sidebar-link td-sidebar-link__page" id=m-docsnavpatterns2-anti-patternsreusable-bugs><span>Reusable Bugs</span></a>
</li>
</ul>
</li><li class="td-sidebar-nav__section-title td-sidebar-nav__section with-child collapse" id=m-docsnavpatterns3-cal-coding-guidelines-li>
</li></ul></li><li class="td-sidebar-nav__section-title td-sidebar-nav__section with-child collapse" id=m-docsnavpatterns3-cal-coding-guidelines-li>
<a href=/docs/navpatterns/3-cal-coding-guidelines/ class="align-left pl-0 td-sidebar-link td-sidebar-link__section" id=m-docsnavpatterns3-cal-coding-guidelines><span>3. CAL Coding Guidelines</span></a>
<ul class="ul-3 foldable">
<li class="td-sidebar-nav__section-title td-sidebar-nav__section with-child collapse" id=m-docsnavpatterns3-cal-coding-guidelinesdesign-li>
@ -353,18 +319,14 @@ Like in this example, we have an interface, to implement different ways for gett
<a href=/docs/navpatterns/3-cal-coding-guidelines/design/variable-capacity-mismatch/ class="align-left pl-0 td-sidebar-link td-sidebar-link__page" id=m-docsnavpatterns3-cal-coding-guidelinesdesignvariable-capacity-mismatch><span>Variable Capacity Mismatch</span></a>
</li><li class="td-sidebar-nav__section-title td-sidebar-nav__section without-child collapse" id=m-docsnavpatterns3-cal-coding-guidelinesdesignwith-scope-name-collision-li>
<a href=/docs/navpatterns/3-cal-coding-guidelines/design/with-scope-name-collision/ class="align-left pl-0 td-sidebar-link td-sidebar-link__page" id=m-docsnavpatterns3-cal-coding-guidelinesdesignwith-scope-name-collision><span>WITH Scope Name Collision</span></a>
</li>
</ul>
</li><li class="td-sidebar-nav__section-title td-sidebar-nav__section without-child collapse" id=m-docsnavpatterns3-cal-coding-guidelinesinternally-used-dot-net-types-li>
</li></ul></li><li class="td-sidebar-nav__section-title td-sidebar-nav__section without-child collapse" id=m-docsnavpatterns3-cal-coding-guidelinesinternally-used-dot-net-types-li>
<a href=/docs/navpatterns/3-cal-coding-guidelines/internally-used-dot-net-types/ class="align-left pl-0 td-sidebar-link td-sidebar-link__page" id=m-docsnavpatterns3-cal-coding-guidelinesinternally-used-dot-net-types><span>Internally used DotNet Types</span></a>
</li><li class="td-sidebar-nav__section-title td-sidebar-nav__section with-child collapse" id=m-docsnavpatterns3-cal-coding-guidelinesinternationalization-li>
<a href=/docs/navpatterns/3-cal-coding-guidelines/internationalization/ class="align-left pl-0 td-sidebar-link td-sidebar-link__section" id=m-docsnavpatterns3-cal-coding-guidelinesinternationalization><span>Internationalization</span></a>
<ul class="ul-4 foldable">
<li class="td-sidebar-nav__section-title td-sidebar-nav__section without-child collapse" id=m-docsnavpatterns3-cal-coding-guidelinesinternationalizationusing-calcdate-li>
<a href=/docs/navpatterns/3-cal-coding-guidelines/internationalization/using-calcdate/ class="align-left pl-0 td-sidebar-link td-sidebar-link__page" id=m-docsnavpatterns3-cal-coding-guidelinesinternationalizationusing-calcdate><span>Using Calcdate</span></a>
</li>
</ul>
</li><li class="td-sidebar-nav__section-title td-sidebar-nav__section with-child collapse" id=m-docsnavpatterns3-cal-coding-guidelineslocalizability-li>
</li></ul></li><li class="td-sidebar-nav__section-title td-sidebar-nav__section with-child collapse" id=m-docsnavpatterns3-cal-coding-guidelineslocalizability-li>
<a href=/docs/navpatterns/3-cal-coding-guidelines/localizability/ class="align-left pl-0 td-sidebar-link td-sidebar-link__section" id=m-docsnavpatterns3-cal-coding-guidelineslocalizability><span>Localizability</span></a>
<ul class="ul-4 foldable">
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@ -377,9 +339,7 @@ Like in this example, we have an interface, to implement different ways for gett
<a href=/docs/navpatterns/3-cal-coding-guidelines/localizability/use-text-constants/ class="align-left pl-0 td-sidebar-link td-sidebar-link__page" id=m-docsnavpatterns3-cal-coding-guidelineslocalizabilityuse-text-constants><span>Use Text Constants</span></a>
</li><li class="td-sidebar-nav__section-title td-sidebar-nav__section without-child collapse" id=m-docsnavpatterns3-cal-coding-guidelineslocalizabilityusing-optioncaptionml-li>
<a href=/docs/navpatterns/3-cal-coding-guidelines/localizability/using-optioncaptionml/ class="align-left pl-0 td-sidebar-link td-sidebar-link__page" id=m-docsnavpatterns3-cal-coding-guidelineslocalizabilityusing-optioncaptionml><span>Using OptionCaptionML</span></a>
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<a href=/docs/navpatterns/3-cal-coding-guidelines/readability/ class="align-left pl-0 td-sidebar-link td-sidebar-link__section" id=m-docsnavpatterns3-cal-coding-guidelinesreadability><span>Readability</span></a>
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@ -446,9 +406,7 @@ Like in this example, we have an interface, to implement different ways for gett
<a href=/docs/navpatterns/3-cal-coding-guidelines/readability/variable-naming/ class="align-left pl-0 td-sidebar-link td-sidebar-link__page" id=m-docsnavpatterns3-cal-coding-guidelinesreadabilityvariable-naming><span>Variable Naming</span></a>
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<a href=/docs/navpatterns/3-cal-coding-guidelines/readability/variables-declarations-order/ class="align-left pl-0 td-sidebar-link td-sidebar-link__page" id=m-docsnavpatterns3-cal-coding-guidelinesreadabilityvariables-declarations-order><span>Variables Declarations Order</span></a>
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<a href=/docs/navpatterns/3-cal-coding-guidelines/ux/ class="align-left pl-0 td-sidebar-link td-sidebar-link__section" id=m-docsnavpatterns3-cal-coding-guidelinesux><span>UX</span></a>
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@ -459,11 +417,7 @@ Like in this example, we have an interface, to implement different ways for gett
<a href=/docs/navpatterns/3-cal-coding-guidelines/ux/fielderror/ class="align-left pl-0 td-sidebar-link td-sidebar-link__page" id=m-docsnavpatterns3-cal-coding-guidelinesuxfielderror><span>FIELDERROR</span></a>
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<a href=/docs/navpatterns/3-cal-coding-guidelines/ux/message-and-error/ class="align-left pl-0 td-sidebar-link td-sidebar-link__page" id=m-docsnavpatterns3-cal-coding-guidelinesuxmessage-and-error><span>MESSAGE and ERROR</span></a>
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<a href=/docs/navpatterns/4-get-involved/ class="align-left pl-0 td-sidebar-link td-sidebar-link__section" id=m-docsnavpatterns4-get-involved><span>(OLD) Get Involved</span></a>
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<li class="td-sidebar-nav__section-title td-sidebar-nav__section without-child collapse" id=m-docsnavpatterns4-get-involvedcode-of-conduct-li>
@ -472,13 +426,9 @@ Like in this example, we have an interface, to implement different ways for gett
<a href=/docs/navpatterns/4-get-involved/patterns-authors/ class="align-left pl-0 td-sidebar-link td-sidebar-link__page" id=m-docsnavpatterns4-get-involvedpatterns-authors><span>Patterns Authors</span></a>
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<a href=/docs/navpatterns/4-get-involved/template-for-writing-nav-design-patterns/ class="align-left pl-0 td-sidebar-link td-sidebar-link__page" id=m-docsnavpatterns4-get-involvedtemplate-for-writing-nav-design-patterns><span>Template for writing Nav Design Patterns</span></a>
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@ -494,27 +444,14 @@ Like in this example, we have an interface, to implement different ways for gett
<a href=/docs/contributing/installhugo/manuallyonwindows11/ class="align-left pl-0 td-sidebar-link td-sidebar-link__page" id=m-docscontributinginstallhugomanuallyonwindows11><span>Manually on Windows 11</span></a>
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<a href=/docs/contributing/installhugo/usingpowershellonwindows11/ class="align-left pl-0 td-sidebar-link td-sidebar-link__page" id=m-docscontributinginstallhugousingpowershellonwindows11><span>Powershell on Windows 11</span></a>
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@ -522,158 +459,91 @@ Like in this example, we have an interface, to implement different ways for gett
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<p><em>Created by waldo & Arend-Jan Kauffmann, Described by waldo</em></p>
<h2 id=abstract>Abstract</h2>
<p>In the world of interfaces, it is important to preserve (certain) events over multiple implementation of the interface.</p>
<h2 id=context>Context</h2>
<p>An app can have interfaces.
It makes it possible for other apps to extend/change the implementations of a certain part of the business logic.</p>
<p>Like in this example, we have an interface, to implement different ways for getting weights from scales:</p>
<div class=highlight><pre tabindex=0 style=background-color:#f8f8f8;-moz-tab-size:4;-o-tab-size:4;tab-size:4><code class=language-AL data-lang=AL><span style=color:#204a87;font-weight:700>interface</span><span style=color:#f8f8f8;text-decoration:underline> </span>&#34;IScale&#34;<span style=color:#f8f8f8;text-decoration:underline>
</span><span style=color:#f8f8f8;text-decoration:underline></span>{<span style=color:#f8f8f8;text-decoration:underline>
</span><span style=color:#f8f8f8;text-decoration:underline> </span><span style=color:#204a87;font-weight:700>procedure</span><span style=color:#f8f8f8;text-decoration:underline> </span>GetWeight<span style=color:#ce5c00;font-weight:700>()</span><span style=color:#000;font-weight:700>:</span><span style=color:#f8f8f8;text-decoration:underline> </span><span style=color:#204a87;font-weight:700>Decimal</span><span style=color:#000;font-weight:700>;</span><span style=color:#f8f8f8;text-decoration:underline>
</span><span style=color:#f8f8f8;text-decoration:underline> </span><span style=color:#204a87;font-weight:700>procedure</span><span style=color:#f8f8f8;text-decoration:underline> </span>Tare<span style=color:#ce5c00;font-weight:700>()</span><span style=color:#000;font-weight:700>;</span><span style=color:#f8f8f8;text-decoration:underline>
</span><span style=color:#f8f8f8;text-decoration:underline></span>}<span style=color:#f8f8f8;text-decoration:underline>
</span></code></pre></div><h2 id=problem>Problem</h2>
<p>Multiple apps can subscribe to certain events of the app.
When a new implementation is created, we need to make sure that these events are raised at the right times. If those events were published on the implementation codeunit, it might very well be that those events will not be raised, hard to find, or whatever.</p>
<p>So, if we would implement it like this, it isn&rsquo;t really extensible, as a different implemention would implement different events .. and it&rsquo;s not possible to subscribe to all of them (including future implementations)</p>
<div class=highlight><pre tabindex=0 style=background-color:#f8f8f8;-moz-tab-size:4;-o-tab-size:4;tab-size:4><code class=language-AL data-lang=AL><span style=color:#204a87;font-weight:700>codeunit</span><span style=color:#f8f8f8;text-decoration:underline> </span><span style=color:#0000cf;font-weight:700>50407</span><span style=color:#f8f8f8;text-decoration:underline> </span>&#34;Scale Wrong&#34;<span style=color:#f8f8f8;text-decoration:underline> </span><span style=color:#204a87;font-weight:700>implements</span><span style=color:#f8f8f8;text-decoration:underline> </span>IScale<span style=color:#f8f8f8;text-decoration:underline>
</span><span style=color:#f8f8f8;text-decoration:underline></span>{<span style=color:#f8f8f8;text-decoration:underline>
</span><span style=color:#f8f8f8;text-decoration:underline> </span><span style=color:#204a87;font-weight:700>procedure</span><span style=color:#f8f8f8;text-decoration:underline> </span>GetWeight<span style=color:#ce5c00;font-weight:700>() </span>Result<span style=color:#000;font-weight:700>:</span><span style=color:#f8f8f8;text-decoration:underline> </span><span style=color:#204a87;font-weight:700>Decimal</span><span style=color:#000;font-weight:700>;</span><span style=color:#f8f8f8;text-decoration:underline>
</span><span style=color:#f8f8f8;text-decoration:underline> </span><span style=color:#204a87;font-weight:700>begin</span><span style=color:#f8f8f8;text-decoration:underline>
</span><span style=color:#f8f8f8;text-decoration:underline> </span><span style=color:#8f5902;font-style:italic>//TODO: Implement Bar GetWeight
</span><span style=color:#8f5902;font-style:italic></span><span style=color:#f8f8f8;text-decoration:underline> </span>OnAfterGetWeight<span style=color:#ce5c00;font-weight:700>(</span>Result<span style=color:#ce5c00;font-weight:700>)</span><span style=color:#000;font-weight:700>;</span><span style=color:#f8f8f8;text-decoration:underline>
</span><span style=color:#f8f8f8;text-decoration:underline> </span><span style=color:#204a87;font-weight:700>end</span><span style=color:#000;font-weight:700>;</span><span style=color:#f8f8f8;text-decoration:underline>
</span><span style=color:#f8f8f8;text-decoration:underline>
</span><span style=color:#f8f8f8;text-decoration:underline> </span><span style=color:#204a87;font-weight:700>procedure</span><span style=color:#f8f8f8;text-decoration:underline> </span>Tare<span style=color:#ce5c00;font-weight:700>()</span><span style=color:#000;font-weight:700>;</span><span style=color:#f8f8f8;text-decoration:underline>
</span><span style=color:#f8f8f8;text-decoration:underline> </span><span style=color:#204a87;font-weight:700>begin</span><span style=color:#f8f8f8;text-decoration:underline>
</span><span style=color:#f8f8f8;text-decoration:underline> </span><span style=color:#8f5902;font-style:italic>//TODO: Implement Bar Tare
</span><span style=color:#8f5902;font-style:italic></span><span style=color:#f8f8f8;text-decoration:underline> </span>OnAfterTare<span style=color:#ce5c00;font-weight:700>()</span><span style=color:#000;font-weight:700>;</span><span style=color:#f8f8f8;text-decoration:underline>
</span><span style=color:#f8f8f8;text-decoration:underline> </span><span style=color:#204a87;font-weight:700>end</span><span style=color:#000;font-weight:700>;</span><span style=color:#f8f8f8;text-decoration:underline>
</span><span style=color:#f8f8f8;text-decoration:underline>
</span><span style=color:#f8f8f8;text-decoration:underline> </span>[IntegrationEvent<span style=color:#ce5c00;font-weight:700>(</span>false<span style=color:#000;font-weight:700>,</span><span style=color:#f8f8f8;text-decoration:underline> </span>false<span style=color:#ce5c00;font-weight:700>)</span>]<span style=color:#f8f8f8;text-decoration:underline>
</span><span style=color:#f8f8f8;text-decoration:underline> </span><span style=color:#204a87;font-weight:700>procedure</span><span style=color:#f8f8f8;text-decoration:underline> </span>OnAfterGetWeight<span style=color:#ce5c00;font-weight:700>(</span><span style=color:#204a87;font-weight:700>var</span><span style=color:#f8f8f8;text-decoration:underline> </span>Result<span style=color:#000;font-weight:700>:</span><span style=color:#f8f8f8;text-decoration:underline> </span><span style=color:#204a87;font-weight:700>Decimal</span><span style=color:#ce5c00;font-weight:700>)
</span><span style=color:#ce5c00;font-weight:700> </span><span style=color:#204a87;font-weight:700>begin</span><span style=color:#f8f8f8;text-decoration:underline>
</span><span style=color:#f8f8f8;text-decoration:underline> </span><span style=color:#204a87;font-weight:700>end</span><span style=color:#000;font-weight:700>;</span><span style=color:#f8f8f8;text-decoration:underline>
</span><span style=color:#f8f8f8;text-decoration:underline>
</span><span style=color:#f8f8f8;text-decoration:underline> </span>[IntegrationEvent<span style=color:#ce5c00;font-weight:700>(</span>false<span style=color:#000;font-weight:700>,</span><span style=color:#f8f8f8;text-decoration:underline> </span>false<span style=color:#ce5c00;font-weight:700>)</span>]<span style=color:#f8f8f8;text-decoration:underline>
</span><span style=color:#f8f8f8;text-decoration:underline> </span><span style=color:#204a87;font-weight:700>procedure</span><span style=color:#f8f8f8;text-decoration:underline> </span>OnAfterTare<span style=color:#ce5c00;font-weight:700>()
</span><span style=color:#ce5c00;font-weight:700> </span><span style=color:#204a87;font-weight:700>begin</span><span style=color:#f8f8f8;text-decoration:underline>
</span><span style=color:#f8f8f8;text-decoration:underline> </span><span style=color:#204a87;font-weight:700>end</span><span style=color:#000;font-weight:700>;</span><span style=color:#f8f8f8;text-decoration:underline>
</span><span style=color:#f8f8f8;text-decoration:underline></span>}<span style=color:#f8f8f8;text-decoration:underline>
</span></code></pre></div><h2 id=description>Description</h2>
<p>To mitigate this problem, we can work with a new, dedicated and isolated codeunit, with publisher events to be able to raise them from different places.</p>
<div class=highlight><pre tabindex=0 style=background-color:#f8f8f8;-moz-tab-size:4;-o-tab-size:4;tab-size:4><code class=language-AL data-lang=AL><span style=color:#204a87;font-weight:700>codeunit</span><span style=color:#f8f8f8;text-decoration:underline> </span><span style=color:#0000cf;font-weight:700>50406</span><span style=color:#f8f8f8;text-decoration:underline> </span>&#34;IScale Triggers&#34;<span style=color:#f8f8f8;text-decoration:underline>
</span><span style=color:#f8f8f8;text-decoration:underline></span>{<span style=color:#f8f8f8;text-decoration:underline>
</span><span style=color:#f8f8f8;text-decoration:underline> </span>[IntegrationEvent<span style=color:#ce5c00;font-weight:700>(</span>false<span style=color:#000;font-weight:700>,</span><span style=color:#f8f8f8;text-decoration:underline> </span>false<span style=color:#ce5c00;font-weight:700>)</span>]<span style=color:#f8f8f8;text-decoration:underline>
</span><span style=color:#f8f8f8;text-decoration:underline> </span><span style=color:#204a87;font-weight:700>procedure</span><span style=color:#f8f8f8;text-decoration:underline> </span>OnAfterGetWeight<span style=color:#ce5c00;font-weight:700>(</span><span style=color:#204a87;font-weight:700>var</span><span style=color:#f8f8f8;text-decoration:underline> </span>Result<span style=color:#000;font-weight:700>:</span><span style=color:#f8f8f8;text-decoration:underline> </span><span style=color:#204a87;font-weight:700>Decimal</span><span style=color:#ce5c00;font-weight:700>)
</span><span style=color:#ce5c00;font-weight:700> </span><span style=color:#204a87;font-weight:700>begin</span><span style=color:#f8f8f8;text-decoration:underline>
</span><span style=color:#f8f8f8;text-decoration:underline> </span><span style=color:#204a87;font-weight:700>end</span><span style=color:#000;font-weight:700>;</span><span style=color:#f8f8f8;text-decoration:underline>
</span><span style=color:#f8f8f8;text-decoration:underline>
</span><span style=color:#f8f8f8;text-decoration:underline> </span>[IntegrationEvent<span style=color:#ce5c00;font-weight:700>(</span>false<span style=color:#000;font-weight:700>,</span><span style=color:#f8f8f8;text-decoration:underline> </span>false<span style=color:#ce5c00;font-weight:700>)</span>]<span style=color:#f8f8f8;text-decoration:underline>
</span><span style=color:#f8f8f8;text-decoration:underline> </span><span style=color:#204a87;font-weight:700>procedure</span><span style=color:#f8f8f8;text-decoration:underline> </span>OnAfterTare<span style=color:#ce5c00;font-weight:700>()
</span><span style=color:#ce5c00;font-weight:700> </span><span style=color:#204a87;font-weight:700>begin</span><span style=color:#f8f8f8;text-decoration:underline>
</span><span style=color:#f8f8f8;text-decoration:underline> </span><span style=color:#204a87;font-weight:700>end</span><span style=color:#000;font-weight:700>;</span><span style=color:#f8f8f8;text-decoration:underline>
</span><span style=color:#f8f8f8;text-decoration:underline></span>}<span style=color:#f8f8f8;text-decoration:underline>
</span></code></pre></div><p>This way, it&rsquo;s possible to raise the events in all the implementations:</p>
<div class=highlight><pre tabindex=0 style=background-color:#f8f8f8;-moz-tab-size:4;-o-tab-size:4;tab-size:4><code class=language-AL data-lang=AL><span style=color:#204a87;font-weight:700>codeunit</span><span style=color:#f8f8f8;text-decoration:underline> </span><span style=color:#0000cf;font-weight:700>50405</span><span style=color:#f8f8f8;text-decoration:underline> </span>&#34;Scale Bar&#34;<span style=color:#f8f8f8;text-decoration:underline> </span><span style=color:#204a87;font-weight:700>implements</span><span style=color:#f8f8f8;text-decoration:underline> </span>IScale<span style=color:#f8f8f8;text-decoration:underline>
</span><span style=color:#f8f8f8;text-decoration:underline></span>{<span style=color:#f8f8f8;text-decoration:underline>
</span><span style=color:#f8f8f8;text-decoration:underline> </span><span style=color:#204a87;font-weight:700>var</span><span style=color:#f8f8f8;text-decoration:underline>
</span><span style=color:#f8f8f8;text-decoration:underline> </span>IScaleTriggers<span style=color:#000;font-weight:700>:</span><span style=color:#f8f8f8;text-decoration:underline> </span><span style=color:#204a87;font-weight:700>Codeunit</span><span style=color:#f8f8f8;text-decoration:underline> </span>&#34;IScale Triggers&#34;<span style=color:#000;font-weight:700>;</span><span style=color:#f8f8f8;text-decoration:underline>
</span><span style=color:#f8f8f8;text-decoration:underline>
</span><span style=color:#f8f8f8;text-decoration:underline> </span><span style=color:#204a87;font-weight:700>procedure</span><span style=color:#f8f8f8;text-decoration:underline> </span>GetWeight<span style=color:#ce5c00;font-weight:700>() </span>Result<span style=color:#000;font-weight:700>:</span><span style=color:#f8f8f8;text-decoration:underline> </span><span style=color:#204a87;font-weight:700>Decimal</span><span style=color:#000;font-weight:700>;</span><span style=color:#f8f8f8;text-decoration:underline>
</span><span style=color:#f8f8f8;text-decoration:underline> </span><span style=color:#204a87;font-weight:700>begin</span><span style=color:#f8f8f8;text-decoration:underline>
</span><span style=color:#f8f8f8;text-decoration:underline> </span><span style=color:#8f5902;font-style:italic>//TODO: Implement Bar GetWeight
</span><span style=color:#8f5902;font-style:italic></span><span style=color:#f8f8f8;text-decoration:underline> </span>IScaleTriggers<span style=color:#ce5c00;font-weight:700>.</span>OnAfterGetWeight<span style=color:#ce5c00;font-weight:700>(</span>Result<span style=color:#ce5c00;font-weight:700>)</span><span style=color:#000;font-weight:700>;</span><span style=color:#f8f8f8;text-decoration:underline>
</span><span style=color:#f8f8f8;text-decoration:underline> </span><span style=color:#204a87;font-weight:700>end</span><span style=color:#000;font-weight:700>;</span><span style=color:#f8f8f8;text-decoration:underline>
</span><span style=color:#f8f8f8;text-decoration:underline>
</span><span style=color:#f8f8f8;text-decoration:underline> </span><span style=color:#204a87;font-weight:700>procedure</span><span style=color:#f8f8f8;text-decoration:underline> </span>Tare<span style=color:#ce5c00;font-weight:700>()</span><span style=color:#000;font-weight:700>;</span><span style=color:#f8f8f8;text-decoration:underline>
</span><span style=color:#f8f8f8;text-decoration:underline> </span><span style=color:#204a87;font-weight:700>begin</span><span style=color:#f8f8f8;text-decoration:underline>
</span><span style=color:#f8f8f8;text-decoration:underline> </span><span style=color:#8f5902;font-style:italic>//TODO: Implement Bar Tare
</span><span style=color:#8f5902;font-style:italic></span><span style=color:#f8f8f8;text-decoration:underline> </span>IScaleTriggers<span style=color:#ce5c00;font-weight:700>.</span>OnAfterTare<span style=color:#ce5c00;font-weight:700>()</span><span style=color:#000;font-weight:700>;</span><span style=color:#f8f8f8;text-decoration:underline>
</span><span style=color:#f8f8f8;text-decoration:underline> </span><span style=color:#204a87;font-weight:700>end</span><span style=color:#000;font-weight:700>;</span><span style=color:#f8f8f8;text-decoration:underline>
</span><span style=color:#f8f8f8;text-decoration:underline></span>}<span style=color:#f8f8f8;text-decoration:underline>
</span></code></pre></div><h2 id=benefits>Benefits</h2>
<p>This new codeunit, with public events, makes the events accessible from all places, including new apps that are dependent from this app, and wants to extend the</p>
<p>The naming convention (both starting with &ldquo;IScale&rdquo;) also makes it very easy to find that corresponding events for the interface.</p>
<h2 id=when-not-to-use>When not to use</h2>
<p>Obviously, the events should be carefully considered: only the events that make sense to &ldquo;share&rdquo; over all implementations, need this approach.</p>
<div class="text-muted mt-5 pt-3 border-top">
<h5 class=taxonomy-title>Tags:</h5><ul class=taxonomy-terms>
<li><a class=taxonomy-term href=https://alguidelines.dev/tags/al/ data-taxonomy-term=al><span class=taxonomy-label>AL</span></a></li><li><a class=taxonomy-term href=https://alguidelines.dev/tags/interface/ data-taxonomy-term=interface><span class=taxonomy-label>Interface</span></a></li><li><a class=taxonomy-term href=https://alguidelines.dev/tags/extendability/ data-taxonomy-term=extendability><span class=taxonomy-label>Extendability</span></a></li></ul></div><div class="taxonomy taxonomy-terms-article taxo-categories">
<h5 class=taxonomy-title>Categories:</h5><ul class=taxonomy-terms>
<li><a class=taxonomy-term href=https://alguidelines.dev/categories/pattern/ data-taxonomy-term=pattern><span class=taxonomy-label>Pattern</span></a></li></ul></div></header><p><em>Created by waldo & Arend-Jan Kauffmann, Described by waldo</em></p><h2 id=abstract>Abstract</h2><p>In the world of interfaces, it is important to preserve (certain) events over multiple implementation of the interface.</p><h2 id=context>Context</h2><p>An app can have interfaces.
It makes it possible for other apps to extend/change the implementations of a certain part of the business logic.</p><p>Like in this example, we have an interface, to implement different ways for getting weights from scales:</p><div class=highlight><pre tabindex=0 style=background-color:#f8f8f8;-moz-tab-size:4;-o-tab-size:4;tab-size:4><code class=language-AL data-lang=AL><span style=display:flex><span><span style=color:#204a87;font-weight:700>interface</span><span style=color:#f8f8f8;text-decoration:underline> </span>&#34;IScale&#34;<span style=color:#f8f8f8;text-decoration:underline>
</span></span></span><span style=display:flex><span><span style=color:#f8f8f8;text-decoration:underline></span>{<span style=color:#f8f8f8;text-decoration:underline>
</span></span></span><span style=display:flex><span><span style=color:#f8f8f8;text-decoration:underline> </span><span style=color:#204a87;font-weight:700>procedure</span><span style=color:#f8f8f8;text-decoration:underline> </span>GetWeight<span style=color:#ce5c00;font-weight:700>()</span><span style=color:#000;font-weight:700>:</span><span style=color:#f8f8f8;text-decoration:underline> </span><span style=color:#204a87;font-weight:700>Decimal</span><span style=color:#000;font-weight:700>;</span><span style=color:#f8f8f8;text-decoration:underline>
</span></span></span><span style=display:flex><span><span style=color:#f8f8f8;text-decoration:underline> </span><span style=color:#204a87;font-weight:700>procedure</span><span style=color:#f8f8f8;text-decoration:underline> </span>Tare<span style=color:#ce5c00;font-weight:700>()</span><span style=color:#000;font-weight:700>;</span><span style=color:#f8f8f8;text-decoration:underline>
</span></span></span><span style=display:flex><span><span style=color:#f8f8f8;text-decoration:underline></span>}<span style=color:#f8f8f8;text-decoration:underline>
</span></span></span></code></pre></div><h2 id=problem>Problem</h2><p>Multiple apps can subscribe to certain events of the app.
When a new implementation is created, we need to make sure that these events are raised at the right times. If those events were published on the implementation codeunit, it might very well be that those events will not be raised, hard to find, or whatever.</p><p>So, if we would implement it like this, it isn&rsquo;t really extensible, as a different implemention would implement different events .. and it&rsquo;s not possible to subscribe to all of them (including future implementations)</p><div class=highlight><pre tabindex=0 style=background-color:#f8f8f8;-moz-tab-size:4;-o-tab-size:4;tab-size:4><code class=language-AL data-lang=AL><span style=display:flex><span><span style=color:#204a87;font-weight:700>codeunit</span><span style=color:#f8f8f8;text-decoration:underline> </span><span style=color:#0000cf;font-weight:700>50407</span><span style=color:#f8f8f8;text-decoration:underline> </span>&#34;Scale Wrong&#34;<span style=color:#f8f8f8;text-decoration:underline> </span><span style=color:#204a87;font-weight:700>implements</span><span style=color:#f8f8f8;text-decoration:underline> </span>IScale<span style=color:#f8f8f8;text-decoration:underline>
</span></span></span><span style=display:flex><span><span style=color:#f8f8f8;text-decoration:underline></span>{<span style=color:#f8f8f8;text-decoration:underline>
</span></span></span><span style=display:flex><span><span style=color:#f8f8f8;text-decoration:underline> </span><span style=color:#204a87;font-weight:700>procedure</span><span style=color:#f8f8f8;text-decoration:underline> </span>GetWeight<span style=color:#ce5c00;font-weight:700>() </span>Result<span style=color:#000;font-weight:700>:</span><span style=color:#f8f8f8;text-decoration:underline> </span><span style=color:#204a87;font-weight:700>Decimal</span><span style=color:#000;font-weight:700>;</span><span style=color:#f8f8f8;text-decoration:underline>
</span></span></span><span style=display:flex><span><span style=color:#f8f8f8;text-decoration:underline> </span><span style=color:#204a87;font-weight:700>begin</span><span style=color:#f8f8f8;text-decoration:underline>
</span></span></span><span style=display:flex><span><span style=color:#f8f8f8;text-decoration:underline> </span><span style=color:#8f5902;font-style:italic>//TODO: Implement Bar GetWeight
</span></span></span><span style=display:flex><span><span style=color:#8f5902;font-style:italic></span><span style=color:#f8f8f8;text-decoration:underline> </span>OnAfterGetWeight<span style=color:#ce5c00;font-weight:700>(</span>Result<span style=color:#ce5c00;font-weight:700>)</span><span style=color:#000;font-weight:700>;</span><span style=color:#f8f8f8;text-decoration:underline>
</span></span></span><span style=display:flex><span><span style=color:#f8f8f8;text-decoration:underline> </span><span style=color:#204a87;font-weight:700>end</span><span style=color:#000;font-weight:700>;</span><span style=color:#f8f8f8;text-decoration:underline>
</span></span></span><span style=display:flex><span><span style=color:#f8f8f8;text-decoration:underline>
</span></span></span><span style=display:flex><span><span style=color:#f8f8f8;text-decoration:underline> </span><span style=color:#204a87;font-weight:700>procedure</span><span style=color:#f8f8f8;text-decoration:underline> </span>Tare<span style=color:#ce5c00;font-weight:700>()</span><span style=color:#000;font-weight:700>;</span><span style=color:#f8f8f8;text-decoration:underline>
</span></span></span><span style=display:flex><span><span style=color:#f8f8f8;text-decoration:underline> </span><span style=color:#204a87;font-weight:700>begin</span><span style=color:#f8f8f8;text-decoration:underline>
</span></span></span><span style=display:flex><span><span style=color:#f8f8f8;text-decoration:underline> </span><span style=color:#8f5902;font-style:italic>//TODO: Implement Bar Tare
</span></span></span><span style=display:flex><span><span style=color:#8f5902;font-style:italic></span><span style=color:#f8f8f8;text-decoration:underline> </span>OnAfterTare<span style=color:#ce5c00;font-weight:700>()</span><span style=color:#000;font-weight:700>;</span><span style=color:#f8f8f8;text-decoration:underline>
</span></span></span><span style=display:flex><span><span style=color:#f8f8f8;text-decoration:underline> </span><span style=color:#204a87;font-weight:700>end</span><span style=color:#000;font-weight:700>;</span><span style=color:#f8f8f8;text-decoration:underline>
</span></span></span><span style=display:flex><span><span style=color:#f8f8f8;text-decoration:underline>
</span></span></span><span style=display:flex><span><span style=color:#f8f8f8;text-decoration:underline> </span>[IntegrationEvent<span style=color:#ce5c00;font-weight:700>(</span>false<span style=color:#000;font-weight:700>,</span><span style=color:#f8f8f8;text-decoration:underline> </span>false<span style=color:#ce5c00;font-weight:700>)</span>]<span style=color:#f8f8f8;text-decoration:underline>
</span></span></span><span style=display:flex><span><span style=color:#f8f8f8;text-decoration:underline> </span><span style=color:#204a87;font-weight:700>procedure</span><span style=color:#f8f8f8;text-decoration:underline> </span>OnAfterGetWeight<span style=color:#ce5c00;font-weight:700>(</span><span style=color:#204a87;font-weight:700>var</span><span style=color:#f8f8f8;text-decoration:underline> </span>Result<span style=color:#000;font-weight:700>:</span><span style=color:#f8f8f8;text-decoration:underline> </span><span style=color:#204a87;font-weight:700>Decimal</span><span style=color:#ce5c00;font-weight:700>)
</span></span></span><span style=display:flex><span><span style=color:#ce5c00;font-weight:700> </span><span style=color:#204a87;font-weight:700>begin</span><span style=color:#f8f8f8;text-decoration:underline>
</span></span></span><span style=display:flex><span><span style=color:#f8f8f8;text-decoration:underline> </span><span style=color:#204a87;font-weight:700>end</span><span style=color:#000;font-weight:700>;</span><span style=color:#f8f8f8;text-decoration:underline>
</span></span></span><span style=display:flex><span><span style=color:#f8f8f8;text-decoration:underline>
</span></span></span><span style=display:flex><span><span style=color:#f8f8f8;text-decoration:underline> </span>[IntegrationEvent<span style=color:#ce5c00;font-weight:700>(</span>false<span style=color:#000;font-weight:700>,</span><span style=color:#f8f8f8;text-decoration:underline> </span>false<span style=color:#ce5c00;font-weight:700>)</span>]<span style=color:#f8f8f8;text-decoration:underline>
</span></span></span><span style=display:flex><span><span style=color:#f8f8f8;text-decoration:underline> </span><span style=color:#204a87;font-weight:700>procedure</span><span style=color:#f8f8f8;text-decoration:underline> </span>OnAfterTare<span style=color:#ce5c00;font-weight:700>()
</span></span></span><span style=display:flex><span><span style=color:#ce5c00;font-weight:700> </span><span style=color:#204a87;font-weight:700>begin</span><span style=color:#f8f8f8;text-decoration:underline>
</span></span></span><span style=display:flex><span><span style=color:#f8f8f8;text-decoration:underline> </span><span style=color:#204a87;font-weight:700>end</span><span style=color:#000;font-weight:700>;</span><span style=color:#f8f8f8;text-decoration:underline>
</span></span></span><span style=display:flex><span><span style=color:#f8f8f8;text-decoration:underline></span>}<span style=color:#f8f8f8;text-decoration:underline>
</span></span></span></code></pre></div><h2 id=description>Description</h2><p>To mitigate this problem, we can work with a new, dedicated and isolated codeunit, with publisher events to be able to raise them from different places.</p><div class=highlight><pre tabindex=0 style=background-color:#f8f8f8;-moz-tab-size:4;-o-tab-size:4;tab-size:4><code class=language-AL data-lang=AL><span style=display:flex><span><span style=color:#204a87;font-weight:700>codeunit</span><span style=color:#f8f8f8;text-decoration:underline> </span><span style=color:#0000cf;font-weight:700>50406</span><span style=color:#f8f8f8;text-decoration:underline> </span>&#34;IScale Triggers&#34;<span style=color:#f8f8f8;text-decoration:underline>
</span></span></span><span style=display:flex><span><span style=color:#f8f8f8;text-decoration:underline></span>{<span style=color:#f8f8f8;text-decoration:underline>
</span></span></span><span style=display:flex><span><span style=color:#f8f8f8;text-decoration:underline> </span>[IntegrationEvent<span style=color:#ce5c00;font-weight:700>(</span>false<span style=color:#000;font-weight:700>,</span><span style=color:#f8f8f8;text-decoration:underline> </span>false<span style=color:#ce5c00;font-weight:700>)</span>]<span style=color:#f8f8f8;text-decoration:underline>
</span></span></span><span style=display:flex><span><span style=color:#f8f8f8;text-decoration:underline> </span><span style=color:#204a87;font-weight:700>procedure</span><span style=color:#f8f8f8;text-decoration:underline> </span>OnAfterGetWeight<span style=color:#ce5c00;font-weight:700>(</span><span style=color:#204a87;font-weight:700>var</span><span style=color:#f8f8f8;text-decoration:underline> </span>Result<span style=color:#000;font-weight:700>:</span><span style=color:#f8f8f8;text-decoration:underline> </span><span style=color:#204a87;font-weight:700>Decimal</span><span style=color:#ce5c00;font-weight:700>)
</span></span></span><span style=display:flex><span><span style=color:#ce5c00;font-weight:700> </span><span style=color:#204a87;font-weight:700>begin</span><span style=color:#f8f8f8;text-decoration:underline>
</span></span></span><span style=display:flex><span><span style=color:#f8f8f8;text-decoration:underline> </span><span style=color:#204a87;font-weight:700>end</span><span style=color:#000;font-weight:700>;</span><span style=color:#f8f8f8;text-decoration:underline>
</span></span></span><span style=display:flex><span><span style=color:#f8f8f8;text-decoration:underline>
</span></span></span><span style=display:flex><span><span style=color:#f8f8f8;text-decoration:underline> </span>[IntegrationEvent<span style=color:#ce5c00;font-weight:700>(</span>false<span style=color:#000;font-weight:700>,</span><span style=color:#f8f8f8;text-decoration:underline> </span>false<span style=color:#ce5c00;font-weight:700>)</span>]<span style=color:#f8f8f8;text-decoration:underline>
</span></span></span><span style=display:flex><span><span style=color:#f8f8f8;text-decoration:underline> </span><span style=color:#204a87;font-weight:700>procedure</span><span style=color:#f8f8f8;text-decoration:underline> </span>OnAfterTare<span style=color:#ce5c00;font-weight:700>()
</span></span></span><span style=display:flex><span><span style=color:#ce5c00;font-weight:700> </span><span style=color:#204a87;font-weight:700>begin</span><span style=color:#f8f8f8;text-decoration:underline>
</span></span></span><span style=display:flex><span><span style=color:#f8f8f8;text-decoration:underline> </span><span style=color:#204a87;font-weight:700>end</span><span style=color:#000;font-weight:700>;</span><span style=color:#f8f8f8;text-decoration:underline>
</span></span></span><span style=display:flex><span><span style=color:#f8f8f8;text-decoration:underline></span>}<span style=color:#f8f8f8;text-decoration:underline>
</span></span></span></code></pre></div><p>This way, it&rsquo;s possible to raise the events in all the implementations:</p><div class=highlight><pre tabindex=0 style=background-color:#f8f8f8;-moz-tab-size:4;-o-tab-size:4;tab-size:4><code class=language-AL data-lang=AL><span style=display:flex><span><span style=color:#204a87;font-weight:700>codeunit</span><span style=color:#f8f8f8;text-decoration:underline> </span><span style=color:#0000cf;font-weight:700>50405</span><span style=color:#f8f8f8;text-decoration:underline> </span>&#34;Scale Bar&#34;<span style=color:#f8f8f8;text-decoration:underline> </span><span style=color:#204a87;font-weight:700>implements</span><span style=color:#f8f8f8;text-decoration:underline> </span>IScale<span style=color:#f8f8f8;text-decoration:underline>
</span></span></span><span style=display:flex><span><span style=color:#f8f8f8;text-decoration:underline></span>{<span style=color:#f8f8f8;text-decoration:underline>
</span></span></span><span style=display:flex><span><span style=color:#f8f8f8;text-decoration:underline> </span><span style=color:#204a87;font-weight:700>var</span><span style=color:#f8f8f8;text-decoration:underline>
</span></span></span><span style=display:flex><span><span style=color:#f8f8f8;text-decoration:underline> </span>IScaleTriggers<span style=color:#000;font-weight:700>:</span><span style=color:#f8f8f8;text-decoration:underline> </span><span style=color:#204a87;font-weight:700>Codeunit</span><span style=color:#f8f8f8;text-decoration:underline> </span>&#34;IScale Triggers&#34;<span style=color:#000;font-weight:700>;</span><span style=color:#f8f8f8;text-decoration:underline>
</span></span></span><span style=display:flex><span><span style=color:#f8f8f8;text-decoration:underline>
</span></span></span><span style=display:flex><span><span style=color:#f8f8f8;text-decoration:underline> </span><span style=color:#204a87;font-weight:700>procedure</span><span style=color:#f8f8f8;text-decoration:underline> </span>GetWeight<span style=color:#ce5c00;font-weight:700>() </span>Result<span style=color:#000;font-weight:700>:</span><span style=color:#f8f8f8;text-decoration:underline> </span><span style=color:#204a87;font-weight:700>Decimal</span><span style=color:#000;font-weight:700>;</span><span style=color:#f8f8f8;text-decoration:underline>
</span></span></span><span style=display:flex><span><span style=color:#f8f8f8;text-decoration:underline> </span><span style=color:#204a87;font-weight:700>begin</span><span style=color:#f8f8f8;text-decoration:underline>
</span></span></span><span style=display:flex><span><span style=color:#f8f8f8;text-decoration:underline> </span><span style=color:#8f5902;font-style:italic>//TODO: Implement Bar GetWeight
</span></span></span><span style=display:flex><span><span style=color:#8f5902;font-style:italic></span><span style=color:#f8f8f8;text-decoration:underline> </span>IScaleTriggers<span style=color:#ce5c00;font-weight:700>.</span>OnAfterGetWeight<span style=color:#ce5c00;font-weight:700>(</span>Result<span style=color:#ce5c00;font-weight:700>)</span><span style=color:#000;font-weight:700>;</span><span style=color:#f8f8f8;text-decoration:underline>
</span></span></span><span style=display:flex><span><span style=color:#f8f8f8;text-decoration:underline> </span><span style=color:#204a87;font-weight:700>end</span><span style=color:#000;font-weight:700>;</span><span style=color:#f8f8f8;text-decoration:underline>
</span></span></span><span style=display:flex><span><span style=color:#f8f8f8;text-decoration:underline>
</span></span></span><span style=display:flex><span><span style=color:#f8f8f8;text-decoration:underline> </span><span style=color:#204a87;font-weight:700>procedure</span><span style=color:#f8f8f8;text-decoration:underline> </span>Tare<span style=color:#ce5c00;font-weight:700>()</span><span style=color:#000;font-weight:700>;</span><span style=color:#f8f8f8;text-decoration:underline>
</span></span></span><span style=display:flex><span><span style=color:#f8f8f8;text-decoration:underline> </span><span style=color:#204a87;font-weight:700>begin</span><span style=color:#f8f8f8;text-decoration:underline>
</span></span></span><span style=display:flex><span><span style=color:#f8f8f8;text-decoration:underline> </span><span style=color:#8f5902;font-style:italic>//TODO: Implement Bar Tare
</span></span></span><span style=display:flex><span><span style=color:#8f5902;font-style:italic></span><span style=color:#f8f8f8;text-decoration:underline> </span>IScaleTriggers<span style=color:#ce5c00;font-weight:700>.</span>OnAfterTare<span style=color:#ce5c00;font-weight:700>()</span><span style=color:#000;font-weight:700>;</span><span style=color:#f8f8f8;text-decoration:underline>
</span></span></span><span style=display:flex><span><span style=color:#f8f8f8;text-decoration:underline> </span><span style=color:#204a87;font-weight:700>end</span><span style=color:#000;font-weight:700>;</span><span style=color:#f8f8f8;text-decoration:underline>
</span></span></span><span style=display:flex><span><span style=color:#f8f8f8;text-decoration:underline></span>}<span style=color:#f8f8f8;text-decoration:underline>
</span></span></span></code></pre></div><h2 id=benefits>Benefits</h2><p>This new codeunit, with public events, makes the events accessible from all places, including new apps that are dependent from this app, and wants to extend the</p><p>The naming convention (both starting with &ldquo;IScale&rdquo;) also makes it very easy to find that corresponding events for the interface.</p><h2 id=when-not-to-use>When not to use</h2><p>Obviously, the events should be carefully considered: only the events that make sense to &ldquo;share&rdquo; over all implementations, need this approach.</p><div class="text-muted mt-5 pt-3 border-top">
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