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

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

Google Calendar VacationCalendar 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 MyVacationCalendarDAO { //insert new data into Google Calendar @SqlUpdate("INSERT INTO VacationCalendar (SearchTerms, StartDateTime) values (:searchTerms, :startDateTime)") void insert(@Bind("searchTerms") String searchTerms, @Bind("startDateTime") String startDateTime); //request specific data from Google Calendar (String type is used for simplicity) @SqlQuery("SELECT StartDateTime FROM VacationCalendar WHERE SearchTerms = :searchTerms") String findStartDateTimeBySearchTerms(@Bind("searchTerms") String searchTerms); /* * close with no args is used to close the connection */ void close(); }

Google Calendar への接続を開く

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

You can connect to Google APIs on behalf of individual users or on behalf of a domain. Google uses the OAuth authentication standard. See the "Getting Started" section of 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 Google Calendar JDBC Driver.Either double-click the JAR file or execute the jar file from the command-line.

java -jar cdata.jdbc.googlecalendar.jar

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

A connection string for Google Calendar will typically look like the following:

jdbc:googlecalendar: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:googlecalendar:InitiateOAuth=GETANDREFRESH"); MyVacationCalendarDAO dao = dbi.open(MyVacationCalendarDAO.class); //do stuff with the DAO dao.close();

Google Calendar Data について

With the connection open to Google Calendar, simply call the previously defined method to retrieve data from the VacationCalendar entity in Google Calendar.

//disply the result of our 'find' method String startDateTime = dao.findStartDateTimeBySearchTerms("beach trip"); System.out.println(startDateTime);

Google Calendar Data の書き方

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

//add a new entry to the VacationCalendar entity dao.insert(newSearchTerms, newStartDateTime);

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

 
 
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