From 9a7d93d496e9e9b1916d98391ff00efbb615547c Mon Sep 17 00:00:00 2001
From: Robert von Burg <eitch@eitchnet.ch>
Date: Thu, 15 Sep 2016 19:12:40 +0200
Subject: [PATCH] [Project] Extended documentation with architecture

---
 .../www.strolch.li/documentation.html         |   1 +
 .../documentation_architecture.html           | 152 ++++++++++++++++++
 .../www.strolch.li/documentation_realms.html  |   2 +-
 .../images/Strolch-Bird-View.svg              |   2 +
 .../images/Strolch-Squirrel-View.svg          |   2 +
 5 files changed, 158 insertions(+), 1 deletion(-)
 create mode 100644 li.strolch.website/www.strolch.li/documentation_architecture.html
 create mode 100644 li.strolch.website/www.strolch.li/images/Strolch-Bird-View.svg
 create mode 100644 li.strolch.website/www.strolch.li/images/Strolch-Squirrel-View.svg
diff --git a/li.strolch.website/www.strolch.li/documentation.html b/li.strolch.website/www.strolch.li/documentation.html
index a358eebb8..0705be8dc 100644
--- a/li.strolch.website/www.strolch.li/documentation.html
+++ b/li.strolch.website/www.strolch.li/documentation.html
@@ -55,6 +55,7 @@
 
         <p>Currently we have the following topics of discussion:</p>
         <ul>
+            <li><a href="documentation_architecture.html">Strolch Architecture</a></li>
             <li><a href="documentation_do_and_dont.html">Strolch Do and Don’t</a></li>
             <li><a href="documentation_runtime.html">Strolch Runtime Configuration</a></li>
             <li><a href="documentation_realms.html">Strolch Realms</a></li>
diff --git a/li.strolch.website/www.strolch.li/documentation_architecture.html b/li.strolch.website/www.strolch.li/documentation_architecture.html
new file mode 100644
index 000000000..ce98ed786
--- /dev/null
+++ b/li.strolch.website/www.strolch.li/documentation_architecture.html
@@ -0,0 +1,152 @@
+<!DOCTYPE html>
+<html lang="en">
+<head>
+    <meta charset="utf-8">
+    <meta http-equiv="X-UA-Compatible" content="IE=edge">
+    <meta name="google-site-verification" content="CPhbjooaiTdROm7Vs4E7kuHZvBfkeLUtonGgcVUbTL8"/>
+    <meta name="viewport" content="width=device-width, initial-scale=1">
+    <meta name="description" content="">
+    <meta name="author" content="">
+    <link rel="shortcut icon" href="ico/favicon.ico">
+
+    <title>Strolch: Architecture</title>
+
+    <!-- Bootstrap core CSS -->
+    <link href="css/bootstrap.min.css" rel="stylesheet">
+
+    <!-- Custom styles for this template -->
+    <link href="css/custom.css" rel="stylesheet">
+
+    <!-- HTML5 shim and Respond.js IE8 support of HTML5 elements and media queries --><!--[if lt IE 9]>
+    <script src="https://oss.maxcdn.com/libs/html5shiv/3.7.0/html5shiv.js"></script>
+    <script src="https://oss.maxcdn.com/libs/respond.js/1.4.2/respond.min.js"></script><![endif]-->
+</head>
+<body>
+<div class="navbar navbar-inverse navbar-fixed-top" role="navigation">
+    <div class="container">
+        <div class="navbar-header">
+            <a class="navbar-brand" href="index.html">Strolch</a>
+        </div>
+        <div class="collapse navbar-collapse">
+            <ul class="nav navbar-nav">
+                <li><a href="index.html">Overview</a></li>
+                <li><a href="api.html">API</a></li>
+                <li class="active"><a href="documentation.html">Documentation</a></li>
+                <li><a href="downloads.html">Downloads</a></li>
+                <li><a href="development.html">Development</a></li>
+                <li><a href="blog.html">Blog</a></li>
+            </ul>
+        </div>
+        <!--/.nav-collapse -->
+    </div>
+</div>
+
+<div class="container">
+
+    <div class="page-header">
+        <h1 class="page-title">Documentation: Architecture</h1>
+
+        <p class="lead page-description">This page discusses the architecture of a Strolch Agent</p>
+    </div>
+
+    <div class="content">
+
+        <h2>Birds View</h2>
+
+        <p>A Strolch agent's architecture can be seen as a simple three-tier architecture. The presentation layer is
+            mostly a web frontend, where the communication with the agent is done via REST API calls.</p>
+
+        <p>The agent itself implements the business logic using Services, Commands, Queries etc.</p>
+
+        <p>The agent can communicate with other 3rd systems using any API, where it is preferred to use JSON over
+            REST.</p>
+
+        <p>The agent can use a standard RDBMS as a storage system, where currently DAOs have been implemented only for
+            PostgreSQL. Should it be required, then any JDBC cabable RDBMS can be used, as no PostgreSQL specific SQL
+            commands are used.</p>
+
+        <p>The following diagram helps visualize this:</p>
+
+        <img src="images/Strolch-Bird-View.svg" class="img-responsive center-block" alt="Strolch Agent Bird View">
+
+        <br/>
+
+        <h2>Squirrel View</h2>
+
+        <p>The following diagram shows a more detailed view of the architecture of a Strolch Agent.</p>
+
+        <img src="images/Strolch-Squirrel-View.svg" class="img-responsive center-block"
+             alt="Strolch Agent Squirrel View">
+
+        <p>A Strolch agent consists of the following main parts:</p>
+        <ul>
+            <li>REST Endpoints &rarr; expose an API to access the Strolch agent outside of the Java VM</li>
+            <li>Services and Commands &rarr; implements business logic</li>
+            <li>Queries &rarr; implements specific queries against the Strolch model</li>
+            <li>Components &rarr; Implements additional logic, which is best implement as a component. E.g. active
+                components which have threads, etc.
+            </li>
+            <li>Realms &rarr; implements multi-tenant capabilities</li>
+        </ul>
+
+        <p>In addition to the main parts, Strolch contains inherit capabilities, which gives Strolch unique features
+            when compared to other Java Frameworks:</p>
+        <ul>
+            <li>Privileges &rarr; Strolch is user agnostic and any action, i.e. Service, Query, etc. is authorized
+                against the authenticated user.
+            </li>
+            <li>Transactions &rarr; Transactions handle locking/unlocking of objects, updating the model and are the
+                central API for the developer.
+            </li>
+            <li>Observers &rarr; modifications to the model are propagated to listeners using the observer pattern.</li>
+            <li>Versioning &rarr; modifications to objects are versioned and thus can be rolled back at a later time.
+            </li>
+            <li>Policies &rarr; Policies allow injecting different algorithms. All root elements can store Policy
+                definitions, so that a service can delegate to a Policy and thus behave differently, depending on the
+                element being accessed.
+            </li>
+        </ul>
+
+
+        <!-- content here -->
+
+    </div>
+    <!-- /.content -->
+
+    <div id="footer">
+        <div class="container">
+            <p class="text-muted">&copy; Strolch / <a href="mailto:eitch@eitchnet.ch">Robert von Burg</a> / Hosting by
+                <a href="http://www.eitchnet.ch">eitchnet.ch</a></p>
+        </div>
+    </div>
+
+</div>
+<!-- /.container -->
+
+<!-- jQuery (necessary for Bootstrap's JavaScript plugins) -->
+<script src="https://ajax.googleapis.com/ajax/libs/jquery/1.11.0/jquery.min.js"></script>
+<!-- Include all compiled plugins (below), or include individual files as needed -->
+<script src="js/bootstrap.min.js"></script>
+
+<!-- Piwik -->
+<script type="text/javascript">
+    var _paq = _paq || [];
+    _paq.push(['trackPageView']);
+    _paq.push(['enableLinkTracking']);
+    (function () {
+        var u = (("https:" == document.location.protocol) ? "https" : "http") + "://piwik.eitchnet.ch/";
+        _paq.push(['setTrackerUrl', u + 'piwik.php']);
+        _paq.push(['setSiteId', 2]);
+        var d = document, g = d.createElement('script'), s = d.getElementsByTagName('script')[0];
+        g.type = 'text/javascript';
+        g.defer = true;
+        g.async = true;
+        g.src = u + 'piwik.js';
+        s.parentNode.insertBefore(g, s);
+    })();
+</script>
+<noscript><p><img src="http://piwik.eitchnet.ch/piwik.php?idsite=2" style="border:0;" alt=""/></p></noscript>
+<!-- End Piwik Code -->
+
+</body>
+</html>
diff --git a/li.strolch.website/www.strolch.li/documentation_realms.html b/li.strolch.website/www.strolch.li/documentation_realms.html
index c8d411339..2bf9b5985 100644
--- a/li.strolch.website/www.strolch.li/documentation_realms.html
+++ b/li.strolch.website/www.strolch.li/documentation_realms.html
@@ -51,7 +51,7 @@
 
     <div class="content">
 
-        <p>Realms implement multi-mandate capabilities. A Strolch agent can have an arbitrary number of realms
+        <p>Realms implement multi-tenant capabilities. A Strolch agent can have an arbitrary number of realms
             configured and each realm has its own persistence configuration, allowing to separate mandates
             completely.</p>
 
diff --git a/li.strolch.website/www.strolch.li/images/Strolch-Bird-View.svg b/li.strolch.website/www.strolch.li/images/Strolch-Bird-View.svg
new file mode 100644
index 000000000..df7f1c50f
--- /dev/null
+++ b/li.strolch.website/www.strolch.li/images/Strolch-Bird-View.svg
@@ -0,0 +1,2 @@
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\ No newline at end of file
diff --git a/li.strolch.website/www.strolch.li/images/Strolch-Squirrel-View.svg b/li.strolch.website/www.strolch.li/images/Strolch-Squirrel-View.svg
new file mode 100644
index 000000000..1250d2a9e
--- /dev/null
+++ b/li.strolch.website/www.strolch.li/images/Strolch-Squirrel-View.svg
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