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JDBI からWordPress Data のデータアクセスオブジェクトを作成

JDBI でWordPress data 用のSQL オブジェクトAPIを作成する方法を概説します。

JDBI は、Fluent スタイルとSQL オブジェクトスタイルという2つの異なるスタイルAPI を公開する、Java 用のSQL コンビニエンスライブラリです。CData JDBC Driver for WordPress は、Java アプリケーションとリアルタイムWordPress data のデータ連携を実現します。これらの技術を組み合わせることによって、WordPress data へのシンプルなコードアクセスが可能になります。ここでは、基本的なDAO(Data Access Object )とそれに付随するWordPress data の読み書きのためのコードの作成について説明します。

WordPress Categories Entity のDAO を作成

The interface below declares the desired behavior for the SQL object to create a single method for each SQL statement to be implemented.

public interface MyCategoriesDAO { //insert new data into WordPress @SqlUpdate("INSERT INTO Categories (Id, Name) values (:id, :name)") void insert(@Bind("id") String id, @Bind("name") String name); //request specific data from WordPress (String type is used for simplicity) @SqlQuery("SELECT Name FROM Categories WHERE Id = :id") String findNameById(@Bind("id") String id); /* * close with no args is used to close the connection */ void close(); }

WordPress への接続を開く

Collect the necessary connection properties and construct the appropriate JDBC URL for connecting to WordPress.

To connect to WordPress, set the URL property and other authentication properties. WordPress supports Basic (User and Password) and OAuth2.0 authentication, though Basic is recommended for a testing environment only. To connect with OAuth you will need to register an app with WordPress.

See the Getting Started guide in the CData driver documentation for more information.

ビルトイン接続文字列デザイナー

For assistance in constructing the JDBC URL, use the connection string designer built into the WordPress JDBC Driver.Either double-click the JAR file or execute the jar file from the command-line.

java -jar cdata.jdbc.wordpress.jar

Fill in the connection properties and copy the connection string to the clipboard.

A connection string for WordPress will typically look like the following:

jdbc:wordpress:Url=http://www.yourwordpresshost.com;InitiateOAuth=GETANDREFRESH

Use the configured JDBC URL to obtain an instance of the DAO interface.The particular method shown below will open a handle bound to the instance, so the instance needs to be closed explicitly to release the handle and the bound JDBC connection.

DBI dbi = new DBI("jdbc:wordpress:Url=http://www.yourwordpresshost.com;InitiateOAuth=GETANDREFRESH"); MyCategoriesDAO dao = dbi.open(MyCategoriesDAO.class); //do stuff with the DAO dao.close();

WordPress Data について

With the connection open to WordPress, simply call the previously defined method to retrieve data from the Categories entity in WordPress.

//disply the result of our 'find' method String name = dao.findNameById("1"); System.out.println(name);

WordPress Data の書き方

It is also simple to write data to WordPress, using the previously defined method.

//add a new entry to the Categories entity dao.insert(newId, newName);

Since the JDBI library is able to work with JDBC connections, you can easily produce a SQL Object API for WordPress by integrating with the CData JDBC Driver for WordPress.Download a free trial and work with live WordPress data in custom Java applications today.

 
 
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