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

JDBI でInstagram 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 Instagram は、Java アプリケーションとリアルタイムInstagram 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、Instagram 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Instagram 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。

Instagram Media 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 MyMediaDAO { //insert new data into Instagram @SqlUpdate("INSERT INTO Media (TagName, LikesCount) values (:tagName, :likesCount)") void insert(@Bind("tagName") String tagName, @Bind("likesCount") String likesCount); //request specific data from Instagram (String type is used for simplicity) @SqlQuery("SELECT LikesCount FROM Media WHERE TagName = :tagName") String findLikesCountByTagName(@Bind("tagName") String tagName); /* * close with no args is used to close the connection */ void close(); }

Instagram への接続を開く

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

Instagram uses the OAuth 2 authentication standard. You will need to obtain the OAuthClientId, OAuthClientSecret, and CallbackURL by registering an app with Instagram. See the help documentation for a guide.

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 Instagram JDBC Driver.Either double-click the JAR file or execute the jar file from the command-line.

java -jar cdata.jdbc.instagram.jar

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

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

jdbc:instagram:OAuthClientId=MyOAuthClientId;OAuthClientSecret=MyOAuthClientSecret;CallbackURL=http://localhost:portNumber;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:instagram:OAuthClientId=MyOAuthClientId;OAuthClientSecret=MyOAuthClientSecret;CallbackURL=http://localhost:portNumber;InitiateOAuth=GETANDREFRESH"); MyMediaDAO dao = dbi.open(MyMediaDAO.class); //do stuff with the DAO dao.close();

Instagram Data について

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

//disply the result of our 'find' method String likesCount = dao.findLikesCountByTagName("goldfish"); System.out.println(likesCount);

Instagram Data の書き方

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

//add a new entry to the Media entity dao.insert(newTagName, newLikesCount);

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

 
 
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