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

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

Exact Online Accounts 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 MyAccountsDAO { //insert new data into Exact Online @SqlUpdate("INSERT INTO Accounts (IsCompetitor, CreditLinePurchase) values (:isCompetitor, :creditLinePurchase)") void insert(@Bind("isCompetitor") String isCompetitor, @Bind("creditLinePurchase") String creditLinePurchase); //request specific data from Exact Online (String type is used for simplicity) @SqlQuery("SELECT CreditLinePurchase FROM Accounts WHERE IsCompetitor = :isCompetitor") String findCreditLinePurchaseByIsCompetitor(@Bind("isCompetitor") String isCompetitor); /* * close with no args is used to close the connection */ void close(); }

Exact Online への接続を開く

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

Exact Online uses the OAuth authentication standard. The InitiateOAuth connection property facilitates the OAuth flow -- by default, this is set to GETANDREFRESH. You can also use the embedded OAuth credentials or you can register an OAuth app with Exact to obtain your own. In addition to the OAuth values, provide the Region. If Division is not set, the default Division is determined.

See the "Getting Started" chapter of the help 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 Exact Online JDBC Driver.Either double-click the JAR file or execute the jar file from the command-line.

java -jar cdata.jdbc.exactonline.jar

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

A connection string for Exact Online will typically look like the following:

jdbc:exactonline:Region='United States';Division=5512;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:exactonline:Region='United States';Division=5512;InitiateOAuth=GETANDREFRESH"); MyAccountsDAO dao = dbi.open(MyAccountsDAO.class); //do stuff with the DAO dao.close();

Exact Online Data について

With the connection open to Exact Online, simply call the previously defined method to retrieve data from the Accounts entity in Exact Online.

//disply the result of our 'find' method String creditLinePurchase = dao.findCreditLinePurchaseByIsCompetitor("False"); System.out.println(creditLinePurchase);

Exact Online Data の書き方

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

//add a new entry to the Accounts entity dao.insert(newIsCompetitor, newCreditLinePurchase);

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

 
 
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