0-fachliche-komponenten.ipynb

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     "text": [
      "The cypher extension is already loaded. To reload it, use:\n",
      "  %reload_ext cypher\n"
     ]
    }
   ],
   "source": [
    "import plotly.express as px\n",
    "\n",
    "%load_ext cypher\n",
    "%config CypherMagic.uri='http://neo4j:neo@localhost:7474/db/data'"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {
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        "hidden": false
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     }
    },
    "slideshow": {
     "slide_type": "slide"
    }
   },
   "source": [
    "# Expertenanalyse mit Software Analytics"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {
    "slideshow": {
     "slide_type": "slide"
    }
   },
   "source": [
    "# Intro zur Analyse der Anwendung \"Spring Data MongoDB\"\n",
    "* Programmierschnittstelle zur Anbindung einer dokumentenbasierten MongoDB-Datenbank an ein Java-Spring-Projekt\n",
    "\n",
    "## Gründe für Wahl\n",
    "* bekanntes Open Source Java Projekt, das zum Spring-Framework gehört\n",
    "* Hosting auf GitHub (zur Analyse der GitHub-Issues)\n",
    "* Verwendung von Maven als Build-Management-Tool (anstatt Gradle, das in vielen Spring-Projekten genutzt wird)\n",
    "* nicht zu groß und nicht zu klein\n",
    "* mehrere Hauptentwickler\n",
    "* Git-Historie geht bis ins Jahr 2010 zurück, sodass der Analysezeitraum ca. 10 Jahre umfasst\n",
    "* ca. 2.800 Github-Issues seit 2013\n",
    "* Issues können von allen Git-Nutzern erstellt werden"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {
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    "slideshow": {
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   },
   "source": [
    "## Fragestellung\n",
    "* In welche fachlichen Komponenten lässt sich der Quellcode der Anwendung für die weitere Analyse sinnvoll strukturieren?\n"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {
    "slideshow": {
     "slide_type": "slide"
    }
   },
   "source": [
    "## Datenquelle\n",
    "* Java-Strukturen des Projekts mit jQAssistant gescannt und in Neo4j abfragbar"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {
    "slideshow": {
     "slide_type": "slide"
    }
   },
   "source": [
    "## Annahmen\n",
    "* Fachliche Komponenten lassen sich durch die Subpackages von `org.springframework.data.mongodb` aufteilen.\n",
    "* Das Haupt-Subpackage `core` kann nochmals in dessen Subpackages aufgeteilt werden."
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {
    "slideshow": {
     "slide_type": "slide"
    }
   },
   "source": [
    "## Validierung\n",
    "* Grafische Übersicht über die existierenden fachlichen Komponenten und deren Anteile am Projekt"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {
    "slideshow": {
     "slide_type": "slide"
    }
   },
   "source": [
    "## Implementierung"
   ]
  },
  {
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   "execution_count": 49,
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     "text": [
      "3 rows affected.\n"
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       "<table>\n",
       "    <thead>\n",
       "        <tr>\n",
       "            <th>ArtefactName</th>\n",
       "            <th>GroupName</th>\n",
       "        </tr>\n",
       "    </thead>\n",
       "    <tbody>\n",
       "        <tr>\n",
       "            <td>spring-data-mongodb-parent</td>\n",
       "            <td>org.springframework.data</td>\n",
       "        </tr>\n",
       "        <tr>\n",
       "            <td>spring-data-mongodb</td>\n",
       "            <td>org.springframework.data</td>\n",
       "        </tr>\n",
       "        <tr>\n",
       "            <td>spring-data-mongodb-distribution</td>\n",
       "            <td>org.springframework.data</td>\n",
       "        </tr>\n",
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       "[['spring-data-mongodb-parent', 'org.springframework.data'],\n",
       " ['spring-data-mongodb', 'org.springframework.data'],\n",
       " ['spring-data-mongodb-distribution', 'org.springframework.data']]"
      ]
     },
     "execution_count": 49,
     "metadata": {},
     "output_type": "execute_result"
    }
   ],
   "source": [
    "%%cypher\n",
    "// Alle Artefakte\n",
    "MATCH (a:Main:Artifact) RETURN a.name AS ArtefactName, a.group AS GroupName"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 50,
   "metadata": {
    "slideshow": {
     "slide_type": "subslide"
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      "1 rows affected.\n"
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       "<table>\n",
       "    <thead>\n",
       "        <tr>\n",
       "            <th>JavaArtefactName</th>\n",
       "            <th>GroupName</th>\n",
       "        </tr>\n",
       "    </thead>\n",
       "    <tbody>\n",
       "        <tr>\n",
       "            <td>spring-data-mongodb</td>\n",
       "            <td>org.springframework.data</td>\n",
       "        </tr>\n",
       "    </tbody>\n",
       "</table>"
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      "text/plain": [
       "[['spring-data-mongodb', 'org.springframework.data']]"
      ]
     },
     "execution_count": 50,
     "metadata": {},
     "output_type": "execute_result"
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   ],
   "source": [
    "%%cypher\n",
    "// Java-Artefakte\n",
    "MATCH (a:Java:Main:Artifact) RETURN a.name AS JavaArtefactName, a.group AS GroupName"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {
    "slideshow": {
     "slide_type": "subslide"
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   },
   "source": [
    "* `spring-data-mongodb` ist das einzige Java-Artefakt, das auch den Anwendungscode enthält.\n",
    "* `spring-data-mongodb-parent` ist das Wurzelverzeichnis, das hauptsächlich Konfigurationsdateien enthält.\n",
    "* `spring-data-mongodb-distribution` enthält Anweisungen zum Bauen einer Distribution.\n",
    "\n",
    "Von den drei Artefakten wird im Folgenden nur das Java-Artefakt `spring-data-mongodb` betrachtet. "
   ]
  },
  {
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   "execution_count": 51,
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       "<table>\n",
       "    <thead>\n",
       "        <tr>\n",
       "            <th>Artifact</th>\n",
       "            <th>JavaTypesInArtifact</th>\n",
       "        </tr>\n",
       "    </thead>\n",
       "    <tbody>\n",
       "        <tr>\n",
       "            <td>spring-data-mongodb</td>\n",
       "            <td>1281</td>\n",
       "        </tr>\n",
       "    </tbody>\n",
       "</table>"
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      "text/plain": [
       "[['spring-data-mongodb', 1281]]"
      ]
     },
     "execution_count": 51,
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   "source": [
    "%%cypher\n",
    "// Anzahl Java-Typen im Artefakt\n",
    "MATCH (a:Java:Main:Artifact)-[:CONTAINS]->(type:Type:Java) \n",
    "WHERE a.name = \"spring-data-mongodb\"           \n",
    "RETURN a.name AS  Artifact, count(type) AS JavaTypesInArtifact"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 52,
   "metadata": {
    "slideshow": {
     "slide_type": "subslide"
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      "0 rows affected.\n"
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       "[]"
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   ],
   "source": [
    "%%cypher\n",
    "// Markierung aller SpringDataMongoDb-Knoten \n",
    "// Added 1332 labels\n",
    "MATCH (artifact:Main:Artifact{name: \"spring-data-mongodb\"})\n",
    "SET artifact:SpringDataMongoDb\n",
    "WITH artifact\n",
    "MATCH (artifact)-[:CONTAINS]->(c)\n",
    "SET c:SpringDataMongoDb"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {
    "slideshow": {
     "slide_type": "slide"
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   },
   "source": [
    "### Aufteilung in fachliche Komponenten\n",
    "* Strukturierung soll nach Subpackages von `org.springframework.data.mongodb` sowie Subpackages von `org.springframework.data.mongodb.core` erfolgen, wobei Typen im `core`-Package nicht doppelt gezählt werden sollen.\n",
    "* Die Zuordnung der Klassen (weiter unten) erfolgt daher für das `core`-Package separat nur auf der ersten Ebene.\n",
    "* Anreicherung des Graphen um zusätzliche Knoten je fachlicher Komponente (`BoundedContext`)\n",
    "* Zuordnung aller Typen in Packages mit dem Namen einer fachlichen Komponente zu eben diesem Bounded Context mit `[:CONTAINS]`"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 53,
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       "<table>\n",
       "    <thead>\n",
       "        <tr>\n",
       "            <th>PackageName</th>\n",
       "            <th>boundedContexts</th>\n",
       "        </tr>\n",
       "    </thead>\n",
       "    <tbody>\n",
       "        <tr>\n",
       "            <td>mongodb</td>\n",
       "            <td>[&#x27;util&#x27;, &#x27;monitor&#x27;, &#x27;config&#x27;, &#x27;repository&#x27;, &#x27;gridfs&#x27;, &#x27;core&#x27;]</td>\n",
       "        </tr>\n",
       "        <tr>\n",
       "            <td>core</td>\n",
       "            <td>[&#x27;convert&#x27;, &#x27;aggregation&#x27;, &#x27;validation&#x27;, &#x27;schema&#x27;, &#x27;geo&#x27;, &#x27;index&#x27;, &#x27;spel&#x27;, &#x27;timeseries&#x27;, &#x27;mapreduce&#x27;, &#x27;script&#x27;, &#x27;messaging&#x27;, &#x27;query&#x27;, &#x27;mapping&#x27;]</td>\n",
       "        </tr>\n",
       "    </tbody>\n",
       "</table>"
      ],
      "text/plain": [
       "[['mongodb', ['util', 'monitor', 'config', 'repository', 'gridfs', 'core']],\n",
       " ['core',\n",
       "  ['convert',\n",
       "   'aggregation',\n",
       "   'validation',\n",
       "   'schema',\n",
       "   'geo',\n",
       "   'index',\n",
       "   'spel',\n",
       "   'timeseries',\n",
       "   'mapreduce',\n",
       "   'script',\n",
       "   'messaging',\n",
       "   'query',\n",
       "   'mapping']]]"
      ]
     },
     "execution_count": 53,
     "metadata": {},
     "output_type": "execute_result"
    }
   ],
   "source": [
    "%%cypher\n",
    "// Packages, die in mongodb und core enhalten sind\n",
    "MATCH (p:Package:SpringDataMongoDb)-[:CONTAINS]->(bC:Package:SpringDataMongoDb)\n",
    "WHERE p.fqn = \"org.springframework.data.mongodb\" OR p.fqn = \"org.springframework.data.mongodb.core\"\n",
    "WITH p, collect(DISTINCT bC.name) AS boundedContexts\n",
    "RETURN p.name AS PackageName, boundedContexts"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 54,
   "metadata": {
    "slideshow": {
     "slide_type": "subslide"
    }
   },
   "outputs": [
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "0 rows affected.\n"
     ]
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       "<table>\n",
       "    <thead>\n",
       "        <tr>\n",
       "        </tr>\n",
       "    </thead>\n",
       "    <tbody>\n",
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       "</table>"
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       "[]"
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   "source": [
    "%%cypher\n",
    "// Anlegen eines Knoten je Fachlichkeit\n",
    "// Added 19 labels, created 19 nodes, set 19 properties\n",
    "MATCH    (p:Package:SpringDataMongoDb)-[:CONTAINS]->(bC:Package:SpringDataMongoDb)\n",
    "WHERE    p.fqn = \"org.springframework.data.mongodb\" OR p.fqn = \"org.springframework.data.mongodb.core\"\n",
    "WITH     collect(DISTINCT bC.name) AS boundedContexts\n",
    "UNWIND   boundedContexts AS boundedContext\n",
    "MERGE    (bC:BoundedContext {name: boundedContext})"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 55,
   "metadata": {
    "slideshow": {
     "slide_type": "subslide"
    }
   },
   "outputs": [
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "18 rows affected.\n"
     ]
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    {
     "data": {
      "text/html": [
       "<table>\n",
       "    <thead>\n",
       "        <tr>\n",
       "            <th>BoundedContext</th>\n",
       "            <th>Size</th>\n",
       "        </tr>\n",
       "    </thead>\n",
       "    <tbody>\n",
       "        <tr>\n",
       "            <td>aggregation</td>\n",
       "            <td>370</td>\n",
       "        </tr>\n",
       "        <tr>\n",
       "            <td>convert</td>\n",
       "            <td>121</td>\n",
       "        </tr>\n",
       "        <tr>\n",
       "            <td>query</td>\n",
       "            <td>105</td>\n",
       "        </tr>\n",
       "        <tr>\n",
       "            <td>repository</td>\n",
       "            <td>93</td>\n",
       "        </tr>\n",
       "        <tr>\n",
       "            <td>mapping</td>\n",
       "            <td>59</td>\n",
       "        </tr>\n",
       "        <tr>\n",
       "            <td>index</td>\n",
       "            <td>49</td>\n",
       "        </tr>\n",
       "        <tr>\n",
       "            <td>config</td>\n",
       "            <td>37</td>\n",
       "        </tr>\n",
       "        <tr>\n",
       "            <td>schema</td>\n",
       "            <td>34</td>\n",
       "        </tr>\n",
       "        <tr>\n",
       "            <td>messaging</td>\n",
       "            <td>33</td>\n",
       "        </tr>\n",
       "        <tr>\n",
       "            <td>util</td>\n",
       "            <td>32</td>\n",
       "        </tr>\n",
       "        <tr>\n",
       "            <td>geo</td>\n",
       "            <td>28</td>\n",
       "        </tr>\n",
       "        <tr>\n",
       "            <td>gridfs</td>\n",
       "            <td>24</td>\n",
       "        </tr>\n",
       "        <tr>\n",
       "            <td>spel</td>\n",
       "            <td>11</td>\n",
       "        </tr>\n",
       "        <tr>\n",
       "            <td>monitor</td>\n",
       "            <td>10</td>\n",
       "        </tr>\n",
       "        <tr>\n",
       "            <td>mapreduce</td>\n",
       "            <td>8</td>\n",
       "        </tr>\n",
       "        <tr>\n",
       "            <td>validation</td>\n",
       "            <td>5</td>\n",
       "        </tr>\n",
       "        <tr>\n",
       "            <td>script</td>\n",
       "            <td>3</td>\n",
       "        </tr>\n",
       "        <tr>\n",
       "            <td>timeseries</td>\n",
       "            <td>2</td>\n",
       "        </tr>\n",
       "    </tbody>\n",
       "</table>"
      ],
      "text/plain": [
       "[['aggregation', 370],\n",
       " ['convert', 121],\n",
       " ['query', 105],\n",
       " ['repository', 93],\n",
       " ['mapping', 59],\n",
       " ['index', 49],\n",
       " ['config', 37],\n",
       " ['schema', 34],\n",
       " ['messaging', 33],\n",
       " ['util', 32],\n",
       " ['geo', 28],\n",
       " ['gridfs', 24],\n",
       " ['spel', 11],\n",
       " ['monitor', 10],\n",
       " ['mapreduce', 8],\n",
       " ['validation', 5],\n",
       " ['script', 3],\n",
       " ['timeseries', 2]]"
      ]
     },
     "execution_count": 55,
     "metadata": {},
     "output_type": "execute_result"
    }
   ],
   "source": [
    "%%cypher\n",
    "// Zuordnen der Klassen zu den Bounded Contexts (inkl. Subpackages, ohne core-Package)\n",
    "// Created 1024 relationships\n",
    "MATCH    (bC:BoundedContext),\n",
    "         (p:Package:SpringDataMongoDb)-[:CONTAINS*]->(t:Type:SpringDataMongoDb)\n",
    "WHERE    p.name = bC.name AND bC.name <> \"core\"\n",
    "MERGE    (bC)-[:CONTAINS]->(t)\n",
    "RETURN   bC.name AS BoundedContext, count(t) AS Size\n",
    "ORDER BY Size DESC"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 56,
   "metadata": {
    "slideshow": {
     "slide_type": "subslide"
    }
   },
   "outputs": [
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "1 rows affected.\n"
     ]
    },
    {
     "data": {
      "text/html": [
       "<table>\n",
       "    <thead>\n",
       "        <tr>\n",
       "            <th>BoundedContext</th>\n",
       "            <th>Size</th>\n",
       "        </tr>\n",
       "    </thead>\n",
       "    <tbody>\n",
       "        <tr>\n",
       "            <td>core</td>\n",
       "            <td>279</td>\n",
       "        </tr>\n",
       "    </tbody>\n",
       "</table>"
      ],
      "text/plain": [
       "[['core', 279]]"
      ]
     },
     "execution_count": 56,
     "metadata": {},
     "output_type": "execute_result"
    }
   ],
   "source": [
    "%%cypher\n",
    "// Zuordnen der Klassen zu den Bounded Contexts (nur Wurzelebene des core-Packages)\n",
    "// Created 279 relationships\n",
    "MATCH    (bC:BoundedContext),\n",
    "         (p:Package:SpringDataMongoDb)-[:CONTAINS*1..1]->(t:Type:SpringDataMongoDb)\n",
    "WHERE    p.name = bC.name AND bC.name = \"core\"\n",
    "MERGE    (bC)-[:CONTAINS]->(t)\n",
    "RETURN   bC.name AS BoundedContext, count(t) AS Size\n",
    "ORDER BY Size DESC"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {
    "slideshow": {
     "slide_type": "slide"
    }
   },
   "source": [
    "## Ergebnisse"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 57,
   "metadata": {
    "slideshow": {
     "slide_type": "subslide"
    }
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    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "1 rows affected.\n"
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    },
    {
     "data": {
      "text/html": [
       "<table>\n",
       "    <thead>\n",
       "        <tr>\n",
       "            <th>overage</th>\n",
       "        </tr>\n",
       "    </thead>\n",
       "    <tbody>\n",
       "        <tr>\n",
       "            <td>97</td>\n",
       "        </tr>\n",
       "    </tbody>\n",
       "</table>"
      ],
      "text/plain": [
       "[[97]]"
      ]
     },
     "execution_count": 57,
     "metadata": {},
     "output_type": "execute_result"
    }
   ],
   "source": [
    "%%cypher\n",
    "// Prozentualer Anteil der zugeordneten Klassen in Prozent (97%)\n",
    "MATCH (t:Type:SpringDataMongoDb)\n",
    "WITH count(DISTINCT t) AS Total\n",
    "MATCH (:BoundedContext)-[:CONTAINS]->(t:Type:SpringDataMongoDb)\n",
    "RETURN 100 * count(DISTINCT t) / Total AS overage"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 58,
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       "<table>\n",
       "    <thead>\n",
       "        <tr>\n",
       "            <th>BoundedContext</th>\n",
       "            <th>ClassCount</th>\n",
       "        </tr>\n",
       "    </thead>\n",
       "    <tbody>\n",
       "        <tr>\n",
       "            <td>aggregation</td>\n",
       "            <td>370</td>\n",
       "        </tr>\n",
       "        <tr>\n",
       "            <td>core</td>\n",
       "            <td>279</td>\n",
       "        </tr>\n",
       "        <tr>\n",
       "            <td>convert</td>\n",
       "            <td>121</td>\n",
       "        </tr>\n",
       "        <tr>\n",
       "            <td>query</td>\n",
       "            <td>105</td>\n",
       "        </tr>\n",
       "        <tr>\n",
       "            <td>repository</td>\n",
       "            <td>93</td>\n",
       "        </tr>\n",
       "        <tr>\n",
       "            <td>mapping</td>\n",
       "            <td>59</td>\n",
       "        </tr>\n",
       "        <tr>\n",
       "            <td>index</td>\n",
       "            <td>49</td>\n",
       "        </tr>\n",
       "        <tr>\n",
       "            <td>config</td>\n",
       "            <td>37</td>\n",
       "        </tr>\n",
       "        <tr>\n",
       "            <td>schema</td>\n",
       "            <td>34</td>\n",
       "        </tr>\n",
       "        <tr>\n",
       "            <td>messaging</td>\n",
       "            <td>33</td>\n",
       "        </tr>\n",
       "        <tr>\n",
       "            <td>util</td>\n",
       "            <td>32</td>\n",
       "        </tr>\n",
       "        <tr>\n",
       "            <td>geo</td>\n",
       "            <td>28</td>\n",
       "        </tr>\n",
       "        <tr>\n",
       "            <td>gridfs</td>\n",
       "            <td>24</td>\n",
       "        </tr>\n",
       "        <tr>\n",
       "            <td>spel</td>\n",
       "            <td>11</td>\n",
       "        </tr>\n",
       "        <tr>\n",
       "            <td>monitor</td>\n",
       "            <td>10</td>\n",
       "        </tr>\n",
       "        <tr>\n",
       "            <td>mapreduce</td>\n",
       "            <td>8</td>\n",
       "        </tr>\n",
       "        <tr>\n",
       "            <td>validation</td>\n",
       "            <td>5</td>\n",
       "        </tr>\n",
       "        <tr>\n",
       "            <td>script</td>\n",
       "            <td>3</td>\n",
       "        </tr>\n",
       "        <tr>\n",
       "            <td>timeseries</td>\n",
       "            <td>2</td>\n",
       "        </tr>\n",
       "    </tbody>\n",
       "</table>"
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       "[['aggregation', 370],\n",
       " ['core', 279],\n",
       " ['convert', 121],\n",
       " ['query', 105],\n",
       " ['repository', 93],\n",
       " ['mapping', 59],\n",
       " ['index', 49],\n",
       " ['config', 37],\n",
       " ['schema', 34],\n",
       " ['messaging', 33],\n",
       " ['util', 32],\n",
       " ['geo', 28],\n",
       " ['gridfs', 24],\n",
       " ['spel', 11],\n",
       " ['monitor', 10],\n",
       " ['mapreduce', 8],\n",
       " ['validation', 5],\n",
       " ['script', 3],\n",
       " ['timeseries', 2]]"
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    "%%cypher\n",
    "// Anzahl SpringDataMongoDb-Typen pro Package\n",
    "MATCH (bC:BoundedContext)-[:CONTAINS*]->(t:Type:SpringDataMongoDb)                                           \n",
    "RETURN bC.name AS  BoundedContext, count(DISTINCT t) AS ClassCount\n",
    "ORDER BY ClassCount DESC"
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    "BoundedContext `core` enthält nur die Typen im eigenen Wurzel-Package. Typen in Subpackages von `core` sind jeweils als eigener BoundedContext aufgeführt. "
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   ],
   "source": [
    "subdomainSize = %cypher MATCH (bC:BoundedContext)-[:CONTAINS*]->(t:Type:SpringDataMongoDb) \\\n",
    "                        RETURN bC.name AS  BoundedContext, count(DISTINCT t) AS TypeCount\n",
    "\n",
    "df = subdomainSize.get_dataframe()\n",
    "fig = px.pie(df, values='TypeCount', names='BoundedContext', title='Größe der fachlichen Komponenten nach Anzahl enthaltener Typen')\n",
    "fig.show()"
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  },
  {
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   "source": [
    "## Nächste Schritte\n",
    "* Experten-Analyse auf Grundlage der Git-Historie\n",
    "* Experten-Analyse auf Grundlage der Github-Issues"
   ]
  }
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