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JRuby からHPCC Systems Data にデータ連携

リアルタイムHPCC Systems data に連携するシンプルなJRuby アプリケーションを作成します。

JRuby はRuby プログラミング言語の高性能で安定した、完全にスレッド化されたJava 実装です。CData JDBC Driver for HPCC Systems を使用すると、JRuby からリアルタイムHPCC Systems data へのデータ連携を簡単に実装できます。ここでは、HPCC Systems data に接続し、クエリを実行して結果を表示する簡単なJRuby アプリを作成する方法を説明します。

HPCC Systems Data にJDBC で接続

Before creating the app, note the installation location for the JAR file for the JDBC Driver (typically C:\Program Files\CDatat\CData JDBC Driver for HPCC Systems\lib).

JRuby natively supports JDBC, so you can easily connect to HPCC Systems and execute SQL queries.Initialize the JDBC connection with the getConnection function of the java.sql.DriverManager class.

To connect, set the following connection properties: Set URL to the machine name or IP address of the server and the port the server is running on, for example, https://server:port. The User and Password are required to authenticate to the HPCC Systems cluster specified in the URL. Note that LDAP authentication is not currently supported by our ODBC driver.

Set Version to the WsSQL Web server version. Note that if you have not already done so, you will need to install the WsSQL service on the HPCC Systems server. The WsSQL Web service is used to interact with the underlying HPCC Systems platform.

Set Cluster to the target cluster.

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

java -jar cdata.jdbc.hpcc.jar

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

Below is a typical JDBC connection string for HPCC Systems:

jdbc:hpcc:URL=http://127.0.0.1:8510;User=test;password=xA123456;Version=1;Cluster=hthor;

HPCC Systems Data への接続性を持つJRuby アプリを作成

Create a new Ruby file (for example: HPCCSelect.rb) and open it in a text editor.Copy the following code into your file:

require 'java' require 'rubygems' require 'C:/Program Files/CData/CData JDBC Driver for HPCC Systems 2018/lib/cdata.jdbc.hpcc.jar' url = "jdbc:hpcc:URL=http://127.0.0.1:8510;User=test;password=xA123456;Version=1;Cluster=hthor;" conn = java.sql.DriverManager.getConnection(url) stmt = conn.createStatement rs = stmt.executeQuery("SELECT CustomerName, Price FROM hpcc::test::orders") while (rs.next) do puts rs.getString(1) + ' ' + rs.getString(2) end

With the file completed, you are ready to display your HPCC Systems data with JRuby.To do so, simply run your file from the command line:

jruby -S HPCCSelect.rb

Writing SQL-92 queries to HPCC Systems allows you to quickly and easily incorporate HPCC Systems data into your own JRuby applications.Download a free trial today!

 
 
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