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Tomcat Connection Pool にCData JDBC Driver for Athena を設定

Tomcat Connection Pool からAthena data に接続。



CData JDBC Drivers は標準JDBC インターフェースをサポートし、JVM 上で実行されるWeb アプリケーションに統合します。この記事では、Tomcat のConnection Pool からAthena data に接続する方法について詳しく説明します。

Tomcat のConnection Pool 経由でAthena Data に接続

  1. CData JAR およびCData .lic ファイルを$CATALINA_HOME/lib にコピーします。CData JAR はインストールディレクトリの[lib]サブフォルダ内にあります。
  2. コンテキストにリソースの定義を追加します:

    Authenticating to Amazon Athena

    To authorize Amazon Athena requests, provide the credentials for an administrator account or for an IAM user with custom permissions: Set AccessKey to the access key Id. Set SecretKey to the secret access key.

    Note: Though you can connect as the AWS account administrator, it is recommended to use IAM user credentials to access AWS services.

    Obtaining the Access Key

    To obtain the credentials for an IAM user, follow the steps below:

    1. Sign into the IAM console.
    2. In the navigation pane, select Users.
    3. To create or manage the access keys for a user, select the user and then select the Security Credentials tab.

    To obtain the credentials for your AWS root account, follow the steps below:

    1. Sign into the AWS Management console with the credentials for your root account.
    2. Select your account name or number and select My Security Credentials in the menu that is displayed.
    3. Click Continue to Security Credentials and expand the Access Keys section to manage or create root account access keys.

    Authenticating from an EC2 Instance

    If you are using the CData Data Provider for Amazon Athena 2018 from an EC2 Instance and have an IAM Role assigned to the instance, you can use the IAM Role to authenticate. To do so, set UseEC2Roles to true and leave AccessKey and SecretKey empty. The CData Data Provider for Amazon Athena 2018 will automatically obtain your IAM Role credentials and authenticate with them.

    Authenticating as an AWS Role

    In many situations it may be preferable to use an IAM role for authentication instead of the direct security credentials of an AWS root user. An AWS role may be used instead by specifying the RoleARN. This will cause the CData Data Provider for Amazon Athena 2018 to attempt to retrieve credentials for the specified role. If you are connecting to AWS (instead of already being connected such as on an EC2 instance), you must additionally specify the AccessKey and SecretKey of an IAM user to assume the role for. Roles may not be used when specifying the AccessKey and SecretKey of an AWS root user.

    Authenticating with MFA

    For users and roles that require Multi-factor Authentication, specify the MFASerialNumber and MFAToken connection properties. This will cause the CData Data Provider for Amazon Athena 2018 to submit the MFA credentials in a request to retrieve temporary authentication credentials. Note that the duration of the temporary credentials may be controlled via the TemporaryTokenDuration (default 3600 seconds).

    Connecting to Amazon Athena

    In addition to the AccessKey and SecretKey properties, specify Database, S3StagingDirectory and Region. Set Region to the region where your Amazon Athena data is hosted. Set S3StagingDirectory to a folder in S3 where you would like to store the results of queries.

    If Database is not set in the connection, the data provider connects to the default database set in Amazon Athena.

    <Resource name="jdbc/amazonathena" auth="Container" type="javax.sql.DataSource" driverClassName="cdata.jdbc.amazonathena.AmazonAthenaDriver" factory="org.apache.tomcat.jdbc.pool.DataSourceFactory" url="jdbc:amazonathena:AccessKey='a123';SecretKey='s123';Region='IRELAND';Database='sampledb';S3StagingDirectory='s3://bucket/staging/';" maxActive="20" maxIdle="10" maxWait="-1" />

    一つのアプリケーションからAthena data へのアクセスを許可するには、上のコードをアプリケーションのMETA-INF ディレクトリにあるcontext.xml に追加します。

    共有リソースの設定には、上のコードを$CATALINA_BASE/conf 内にあるcontext.xml に追加します。共有リソースの設定は、すべてのアプリケーションにSalesforce への接続を提供します。

  3. アプリケーションのweb.xml にリソースへの参照を追加します。 Athena data JSP jdbc/AmazonAthena javax.sql.DataSource コンテナ
  4. Connection pool からの接続の初期化: Context initContext = new InitialContext(); Context envContext = (Context)initContext.lookup("java:/comp/env"); DataSource ds = (DataSource)envContext.lookup("jdbc/AmazonAthena"); Connection conn = ds.getConnection();

そのほかのTomcat 統合

上記の手順では、簡単なコネクションプーリングのシナリオでAthena data に接続する方法を説明しました。ほかの使用例や情報については、 Tomcat 製品ドキュメントの 「JNDI Datasource How-To」をご覧ください。

 
 
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