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[CONTAINERNET-42] テーブル定義情報の取得に時間がかかる場合がある
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git-svn-id: https://www.seasar.org/svn/s2dao.net/trunk@586 638a8f4c-ee01-0410-9780-f2e338a3b7db
@miyagi389
miyagi389 committed Feb 19, 2008
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<a href="index.html">S2Dao.NET TOPページへ</a>

<h1>S2Dao.NET - テーブル定義情報のキャッシュ</h1>

<p>S2Dao.NETでは、Daoインターフェースの初期化時にデータベースからテーブル定義情報を取得しています。
テーブル定義情報の取得に時間がかかる場合、
テーブル定義情報をキャッシュするDataSetを参照することで取得時間の短縮が可能です。</p>

<ul>
<li><a href="#dataset">DataSetの作成</a></li>
<li><a href="#dicon">Diconファイルの定義</a></li>
</ul>

<h2><a name="dataset">DataSetの作成</a></h2>

<p>テーブル定義情報をキャッシュするDataSetは、Visual Studioのデザイナ画面を使用して作成することが可能です。
例えば、次の手順に従って作成します。</p>

<ol>

<li>Visual Studioのソリューション・エクスプローラからDataSetを作成するフォルダを選択し、
コンテキストメニューから「追加」→「新しい項目」を選択します。</li>

<img src="images/cache_dataset1.png" align="left" />
<br clear="all">

<li>「新しい項目の追加」ダイアログを表示するのでテンプレート一覧から「データセット」を選択、
ファイル名にデータセットのファイル名を入力し、「追加」ボタンをクリックします。。</li>

<li>DataSetがソリューション・エクスプローラに追加され、DataSetのデザイナ画面が表示されます。</li>

<img src="images/cache_dataset2.png" align="left" />
<br clear="all">

<li>サーバー・エクスプローラからデータベースに接続します。</li>

<img src="images/cache_dataset3.png" align="left" />
<br clear="all">

<li>テーブル一覧からS2Dao.NETで使用するテーブルをDataSetのデザイナ画面にドラッグ＆ドロップします。</li>

<img src="images/cache_dataset4.png" align="left" />
<br clear="all">

<li>DataSetのデザイナ画面を保存して終了します。</li>

</ol>


<h2><a name="dicon">Diconファイルの定義</a></h2>

<p>テーブル定義情報のキャッシュを使用するために
Dao.dicon(S2Dao.NETのコンポーネントを定義しているDiconファイル)を次のように変更します。</p>

(変更前)
<!-- code formatted by http://manoli.net/csharpformat/ -->
<pre class="csharpcode">
<span class="kwrd">&lt;</span><span class="html">components</span> <span class="attr">namespace</span><span class="kwrd">="Dao"</span><span class="kwrd">&gt;</span>
....

<span class="kwrd">&lt;</span><span class="html">component</span> <span class="attr">class</span><span class="kwrd">="Seasar.Dao.Impl.FieldAnnotationReaderFactory"</span> <span class="kwrd">/&gt;</span>
<span class="kwrd">&lt;</span><span class="html">component</span> <span class="attr">class</span><span class="kwrd">="Seasar.Dao.Impl.DaoMetaDataFactoryImpl"</span> <span class="kwrd">/&gt;</span>
<span class="kwrd">&lt;</span><span class="html">component</span> <span class="attr">name</span><span class="kwrd">="Interceptor"</span> <span class="attr">class</span><span class="kwrd">="Seasar.Dao.Interceptors.S2DaoInterceptor"</span> <span class="kwrd">/&gt;</span>
<span class="kwrd">&lt;/</span><span class="html">components</span><span class="kwrd">&gt;</span></pre>

(変更後)
<!-- code formatted by http://manoli.net/csharpformat/ -->
<pre class="csharpcode">
<span class="kwrd">&lt;</span><span class="html">components</span> <span class="attr">namespace</span><span class="kwrd">="Dao"</span><span class="kwrd">&gt;</span>
....

<span class="kwrd">&lt;</span><span class="html">component</span> <span class="attr">class</span><span class="kwrd">="Seasar.Dao.Impl.FieldAnnotationReaderFactory"</span> <span class="kwrd">/&gt;</span>
<span class="kwrd">&lt;</span><span class="html">component</span> <span class="attr">class</span><span class="kwrd">="Seasar.Dao.Impl.DaoMetaDataFactoryImpl"</span><span class="kwrd">&gt;</span>
<span class="kwrd">&lt;</span><span class="html">property</span> <span class="attr">name</span><span class="kwrd">="DBMetaData"</span><span class="kwrd">&gt;</span>
<span class="kwrd">&lt;</span><span class="html">component</span> <span class="attr">class</span><span class="kwrd">="Seasar.Extension.ADO.Impl.DatabaseMetaDataImpl"</span><span class="kwrd">&gt;</span>
<span class="kwrd">&lt;</span><span class="html">property</span> <span class="attr">name</span><span class="kwrd">="MetaDataSetClassName"</span><span class="kwrd">&gt;</span>"Seasar.ContainerNet42.Dao.EmployeeDataSet"<span class="kwrd">&lt;/</span><span class="html">property</span><span class="kwrd">&gt;</span>
<span class="kwrd">&lt;/</span><span class="html">component</span><span class="kwrd">&gt;</span>
<span class="kwrd">&lt;/</span><span class="html">property</span><span class="kwrd">&gt;</span>
<span class="kwrd">&lt;/</span><span class="html">component</span><span class="kwrd">&gt;</span>
<span class="kwrd">&lt;</span><span class="html">component</span> <span class="attr">name</span><span class="kwrd">="Interceptor"</span> <span class="attr">class</span><span class="kwrd">="Seasar.Dao.Interceptors.S2DaoInterceptor"</span> <span class="kwrd">/&gt;</span>
<span class="kwrd">&lt;/</span><span class="html">components</span><span class="kwrd">&gt;</span></pre>

<p>Seasar.Extension.ADO.Impl.DatabaseMetaDataImplクラスのMetaDataSetClassNameプロパティに<a href="#dataset">DataSetの作成</a>で作成した
DataSetクラスの名前空間+クラス名を設定します。名前空間+クラス名は、[DataSet].Designer.csから確認できます。
</p>

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1 change: 1 addition & 0 deletions www/ja/index.html
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</ul>
<li><a href="sqlcomment.html">SQLコメント</a></li>
<li><a href="s2pager.html">S2Pager</a></li>
<li><a href="cache_dataset.html">テーブル定義情報のキャッシュ(S2Dao.NET 1.3.7以降)</a></li>
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