Oracle Data Integrator ETL からIBM Cloud Object Storage データ連携

この記事では、Oracle Data Integratorを使用してIBM Cloud Object Storage data をデータウェアハウスに転送する方法を説明します。

IBM Cloud Object Storage への接続にJDBC 標準を使用して既存のスキルを活用します。 CData JDBC Driver for IBM Cloud Object Storage は、Oracle Data Integrator(ODI)などのETL ツールへの統合によって、リアルタイムのIBM Cloud Object Storage data をデータウェアハウス、ビジネスインテリジェンス、およびビッグデータテクノロジに連携します。

JDBC 接続を使用すると、ODI 内の他のデータベースと同じようにIBM Cloud Object Storage を使用できます。RDBMS やフラットファイルを使用する代わりに、ドライバーを使用してリアルタイムでIBM Cloud Object Storage API に直接連携できます。

ここでは、JDBC を利用したIBM Cloud Object Storage - Oracle のETL 連携を行います。IBM Cloud Object Storage エンティティのデータモデルをリバースエンジニアリングした後、マッピングを作成してだdata loading strategy を選択します。ドライバーはSQL-92 をサポートしているため、この最後の手順は組み込みSQL からSQL Loading を選択することで簡単に行えます。

ドライバーをインストール

To install the driver, copy the driver JAR and .lic file, located in the installation folder, into the ODI userlib directory:

On Unix: ~/.odi/oracledi/userlib On Windows: %APPDATA%\Roaming\odi\oracledi\userlib

Restart ODI to complete the installation.

モデルのリバースエンジニアリング

Reverse engineering the model retrieves metadata about the driver's relational view of IBM Cloud Object Storage data.After reverse engineering, you can query real-time IBM Cloud Object Storage data and create mappings based on IBM Cloud Object Storage tables.

  1. In ODI, connect to your repository and click New -> Model and Topology Objects.
  2. On the Model screen of the resulting dialog, enter the following information:
    • Name:Enter IBMCloudObjectStorage.
    • Technology:Select Generic SQL.
    • Logical Schema:Enter IBMCloudObjectStorage.
    • Context:Select Global.
  3. On the Data Server screen of the resulting dialog, enter the following information:
    • Name:Enter IBMCloudObjectStorage.
    • Driver List:Select Oracle JDBC Driver.
    • Driver:Enter cdata.jdbc.ibmcloudobjectstorage.IBMCloudObjectStorageDriver
    • URL:Enter the JDBC URL containing the connection string.

      Register a New Instance of Cloud Object Storage

      If you do not already have Cloud Object Storage in your IBM Cloud account, follow the procedure below to install an instance of SQL Query in your account:

      1. Log in to your IBM Cloud account.
      2. Navigate to the page, choose a name for your instance and click Create. You will be redirected to the instance of Cloud Object Storage you just created.

      Connecting using OAuth Authentication

      There are certain connection properties you need to set before you can connect. You can obtain these as follows:

      API Key

      To connect with IBM Cloud Object Storage, you need an API Key. You can obtain this as follows:

      1. Log in to your IBM Cloud account.
      2. Navigate to the Platform API Keys page.
      3. On the middle-right corner click "Create an IBM Cloud API Key" to create a new API Key.
      4. In the pop-up window, specify the API Key name and click "Create". Note the API Key as you can never access it again from the dashboard.

      Cloud Object Storage CRN

      If you have multiple accounts, you will need to specify the CloudObjectStorageCRN explicitly. To find the appropriate value, you can:

      • Query the Services view. This will list your IBM Cloud Object Storage instances along with the CRN for each.
      • Locate the CRN directly in IBM Cloud. To do so, navigate to your IBM Cloud Dashboard. In the Resource List, Under Storage, select your Cloud Object Storage resource to get its CRN.

      Connecting to Data

      You can now set the following to connect to data:

      • InitiateOAuth: Set this to GETANDREFRESH. You can use InitiateOAuth to avoid repeating the OAuth exchange and manually setting the OAuthAccessToken.
      • ApiKey: Set this to your API key which was noted during setup.
      • CloudObjectStorageCRN (Optional): Set this to the cloud object storage CRN you want to work with. While the connector attempts to retrieve this automatically, specifying this explicitly is recommended if you have more than Cloud Object Storage account.

      When you connect, the connector completes the OAuth process.

      1. Extracts the access token and authenticates requests.
      2. Saves OAuth values in OAuthSettingsLocation to be persisted across connections.

      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 IBM Cloud Object Storage JDBC Driver.Either double-click the JAR file or execute the jar file from the command-line.

      java -jar cdata.jdbc.ibmcloudobjectstorage.jar

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

      Below is a typical connection string:

      jdbc:ibmcloudobjectstorage:ApiKey=myApiKey;CloudObjectStorageCRN=MyInstanceCRN;Region=myRegion;OAuthClientId=MyOAuthClientId;OAuthClientSecret=myOAuthClientSecret;
  4. On the Physical Schema screen, enter the following information:
    • Schema (Schema):Enter IBMCloudObjectStorage.
    • Schema (Work Schema):Enter IBMCloudObjectStorage.
  5. In the opened model click Reverse Engineer to retrieve the metadata for IBM Cloud Object Storage tables.

IBM Cloud Object Storage Data を編集して保存

After reverse engineering you can now work with IBM Cloud Object Storage data in ODI. To view IBM Cloud Object Storage data, expand the Models accordion in the Designer navigator, right-click a table, and click View data.

ETL プロジェクトを作成

Follow the steps below to create an ETL from IBM Cloud Object Storage.You will load Objects entities into the sample data warehouse included in the ODI Getting Started VM.

  1. Open SQL Developer and connect to your Oracle database.Right-click the node for your database in the Connections pane and click new SQL Worksheet.

    Alternatively you can use SQLPlus.From a command prompt enter the following:

    sqlplus / as sysdba
  2. Enter the following query to create a new target table in the sample data warehouse, which is in the ODI_DEMO schema.The following query defines a few columns that match the Objects table in IBM Cloud Object Storage: CREATE TABLE ODI_DEMO.TRG_OBJECTS (ETAG NUMBER(20,0),Key VARCHAR2(255));
  3. In ODI expand the Models accordion in the Designer navigator and double-click the Sales Administration node in the ODI_DEMO folder.The model is opened in the Model Editor.
  4. Click Reverse Engineer.The TRG_OBJECTS table is added to the model.
  5. Right-click the Mappings node in your project and click New Mapping.Enter a name for the mapping and clear the Create Empty Dataset option.The Mapping Editor is displayed.
  6. Drag the TRG_OBJECTS table from the Sales Administration model onto the mapping.
  7. Drag the Objects table from the IBM Cloud Object Storage model onto the mapping.
  8. Click the source connector point and drag to the target connector point.The Attribute Matching dialog is displayed.For this example, use the default options.The target expressions are then displayed in the properties for the target columns.
  9. Open the Physical tab of the Mapping Editor and click OBJECTS_AP in TARGET_GROUP.
  10. In the OBJECTS_AP properties, select LKM SQL to SQL (Built-In) on the Loading Knowledge Module tab.

You can then run the mapping to load IBM Cloud Object Storage data into Oracle.

 
 
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