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

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

Amazon Marketplace Orders 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 MyOrdersDAO { //request specific data from Amazon Marketplace (String type is used for simplicity) @SqlQuery("SELECT OrderStatus FROM Orders WHERE IsReplacementOrder = :isReplacementOrder") String findOrderStatusByIsReplacementOrder(@Bind("isReplacementOrder") String isReplacementOrder); /* * close with no args is used to close the connection */ void close(); }

Amazon Marketplace への接続を開く

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

To connect to the Amazon Marketplace Webservice (MWS), AWSAccessKeyId, MWSAuthToken, AWSSecretKey and SellerId are required. You can optionally set the Marketplace property. For more information on obtaining values for these properties, refer to the Help documentation.

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

java -jar cdata.jdbc.amazonmarketplace.jar

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

A connection string for Amazon Marketplace will typically look like the following:

jdbc:amazonmarketplace:AWS Access Key Id=myAWSAccessKeyId;AWS Secret Key=myAWSSecretKey;MWS Auth Token=myMWSAuthToken;Seller Id=mySellerId;Marketplace=United States;

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:amazonmarketplace:AWS Access Key Id=myAWSAccessKeyId;AWS Secret Key=myAWSSecretKey;MWS Auth Token=myMWSAuthToken;Seller Id=mySellerId;Marketplace=United States;"); MyOrdersDAO dao = dbi.open(MyOrdersDAO.class); //do stuff with the DAO dao.close();

Amazon Marketplace Data について

With the connection open to Amazon Marketplace, simply call the previously defined method to retrieve data from the Orders entity in Amazon Marketplace.

//disply the result of our 'find' method String orderStatus = dao.findOrderStatusByIsReplacementOrder("True"); System.out.println(orderStatus);

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

 
 
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