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39 lines
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versioning is baked into Strolch’s fabric. The feature is opt-in, as it is not
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required in all projects, but it only needs enabling, for all modifications to
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objects to be versioned, so that rollbacks can be done when needed.</p><p>The feature is enabled for each realm. In the <code>StrolchConfiguration.xml</code> file
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enable it by adding the <code>enableVersioning</code> propery per realm:</p><div class=highlight><pre style=color:#f8f8f2;background-color:#272822;-moz-tab-size:4;-o-tab-size:4;tab-size:4><code class=language-xml data-lang=xml><span style=color:#f92672><StrolchConfiguration></span>
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<span style=color:#f92672><env</span> <span style=color:#a6e22e>id=</span><span style=color:#e6db74>"dev"</span><span style=color:#f92672>></span>
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...
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<span style=color:#f92672><Component></span>
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<span style=color:#f92672><name></span>RealmHandler<span style=color:#f92672></name></span>
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<span style=color:#f92672><api></span>li.strolch.agent.api.RealmHandler<span style=color:#f92672></api></span>
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<span style=color:#f92672><impl></span>li.strolch.agent.impl.DefaultRealmHandler<span style=color:#f92672></impl></span>
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<span style=color:#f92672><depends></span>PrivilegeHandler<span style=color:#f92672></depends></span>
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<span style=color:#f92672><Properties></span>
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<span style=color:#f92672><realms></span>defaultRealm, otherRealm<span style=color:#f92672></realms></span>
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<span style=color:#f92672><enableVersioning></span>true<span style=color:#f92672></enableVersioning></span>
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<span style=color:#f92672><dataStoreMode></span>TRANSIENT<span style=color:#f92672></dataStoreMode></span>
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<span style=color:#f92672><dataStoreFile></span>StrolchModel.xml<span style=color:#f92672></dataStoreFile></span>
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<span style=color:#f92672><enableVersioning.otherRealm></span>true<span style=color:#f92672></enableVersioning.otherRealm></span>
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<span style=color:#f92672><dataStoreMode.otherRealm></span>TRANSIENT<span style=color:#f92672></dataStoreMode.otherRealm></span>
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<span style=color:#f92672><dataStoreFile.otherRealm></span>StrolchModel.xml<span style=color:#f92672></dataStoreFile.otherRealm></span>
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<span style=color:#f92672></Properties></span>
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<span style=color:#f92672></Component></span>
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<span style=color:#f92672></env></span>
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...
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<span style=color:#f92672></StrolchConfiguration></span>
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</code></pre></div><p>Once versioning is enabled, versioning is handled automatically. The API for versioning is implemented on the ElementMaps.</p><p>Example: Revert to previous version of a Resource:</p><div class=highlight><pre style=color:#f8f8f2;background-color:#272822;-moz-tab-size:4;-o-tab-size:4;tab-size:4><code class=language-java data-lang=java>Resource res <span style=color:#f92672>=</span> tx<span style=color:#f92672>.</span><span style=color:#a6e22e>getResourceBy</span><span style=color:#f92672>(</span><span style=color:#e6db74>"TestType"</span><span style=color:#f92672>,</span> <span style=color:#e6db74>"MyTestResource"</span><span style=color:#f92672>);</span>
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ResourceMap resourceMap <span style=color:#f92672>=</span> tx<span style=color:#f92672>.</span><span style=color:#a6e22e>getResourceMap</span><span style=color:#f92672>();</span>
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Resource previousVersion <span style=color:#f92672>=</span> resourceMap<span style=color:#f92672>.</span><span style=color:#a6e22e>revertToVersion</span><span style=color:#f92672>(</span>tx<span style=color:#f92672>,</span> res<span style=color:#f92672>);</span>
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<span style=color:#75715e>// or
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</span><span style=color:#75715e></span>Resource previousVersion <span style=color:#f92672>=</span> resourceMap<span style=color:#f92672>.</span><span style=color:#a6e22e>revertToVersion</span><span style=color:#f92672>(</span>tx<span style=color:#f92672>,</span> <span style=color:#e6db74>"TestType"</span><span style=color:#f92672>,</span> <span style=color:#e6db74>"MyTestResource"</span><span style=color:#f92672>,</span> 1<span style=color:#f92672>);</span>
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</code></pre></div><p>Example: Retrieve all versions of a Resource:</p><div class=highlight><pre style=color:#f8f8f2;background-color:#272822;-moz-tab-size:4;-o-tab-size:4;tab-size:4><code class=language-java data-lang=java>List<span style=color:#f92672><</span>Resource<span style=color:#f92672>></span> versions <span style=color:#f92672>=</span> resourceMap<span style=color:#f92672>.</span><span style=color:#a6e22e>getVersionsFor</span><span style=color:#f92672>(</span>tx<span style=color:#f92672>,</span> <span style=color:#e6db74>"TestType"</span><span style=color:#f92672>,</span> <span style=color:#e6db74>"MyTestResource"</span><span style=color:#f92672>);</span>
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</code></pre></div><div class="notices tip"><p>Note: When reverting to a previous version, it is important to remember, that
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any references on an element to other elements will also be restored. As long as
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the relationship is to the same element, then this is not an issue, but should
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the relationship have changed, then it this must be handled and the user
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performing a revert be allowed to decided which element to reference in the
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reverted version.</p></div><footer class=footline></footer></div></div><div id=navigation><a class="nav nav-prev" href=/documentation/observers/ title=Observers><i class="fa fa-chevron-left"></i></a><a class="nav nav-next" href=/documentation/reports/ title=Reports style=margin-right:0><i class="fa fa-chevron-right"></i></a></div></section><div style=left:-1000px;overflow:scroll;position:absolute;top:-1000px;border:none;box-sizing:content-box;height:200px;margin:0;padding:0;width:200px><div style=border:none;box-sizing:content-box;height:200px;margin:0;padding:0;width:200px></div></div><script src=/js/clipboard.min.js?1626091328></script><script src=/js/perfect-scrollbar.min.js?1626091328></script><script src=/js/perfect-scrollbar.jquery.min.js?1626091328></script><script src=/js/jquery.sticky.js?1626091328></script><script src=/js/featherlight.min.js?1626091328></script><script src=/js/highlight.pack.js?1626091328></script><script>hljs.initHighlightingOnLoad();</script><script src=/js/modernizr.custom-3.6.0.js?1626091328></script><script src=/js/learn.js?1626091328></script><script src=/js/hugo-learn.js?1626091328></script><script src=/mermaid/mermaid.js?1626091328></script><script>mermaid.initialize({startOnLoad:true});</script></body></html> |