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

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

CloudSign Documents 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 MyDocumentsDAO { //insert new data into CloudSign @SqlUpdate("INSERT INTO Documents (Status, Title) values (:status, :title)") void insert(@Bind("status") String status, @Bind("title") String title); //request specific data from CloudSign (String type is used for simplicity) @SqlQuery("SELECT Title FROM Documents WHERE Status = :status") String findTitleByStatus(@Bind("status") String status); /* * close with no args is used to close the connection */ void close(); }

CloudSign への接続を開く

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

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

java -jar cdata.jdbc.cloudsign.jar

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

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

jdbc:cloudsign:ClientId=MyClientId;UseSandbox=false;

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:cloudsign:ClientId=MyClientId;UseSandbox=false;"); MyDocumentsDAO dao = dbi.open(MyDocumentsDAO.class); //do stuff with the DAO dao.close();

CloudSign Data について

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

//disply the result of our 'find' method String title = dao.findTitleByStatus("0"); System.out.println(title);

CloudSign Data の書き方

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

//add a new entry to the Documents entity dao.insert(newStatus, newTitle);

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

 
 
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