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URL: https://www.cdata.com/kb/tech/elasticsearch-cloud-apos.rst

⇱ Build Semantic Layer Views for Elasticsearch Data in APOS Live Data Gateway

Build Semantic Layer Views for Elasticsearch Data in APOS Live Data Gateway

👁 Dibyendu Datta
Dibyendu Datta
Lead Technology Evangelist
Use the CData Connect AI and APOS Live Data Gateway to build Semantic Layer Views for Elasticsearch data.

APOS Live Data Gateway (LDG) serves as a data connection and data transformation solution, facilitating live data connectivity and broadening data source possibilities for SAP Analytics Cloud and other SAP solutions. When integrated with CData Connect AI, users have the capability to construct semantic layer views for real-time access to Elasticsearch data, enabling real-time analytics on Elasticsearch in a manner akin to working with a relational database.

CData Connect AI offers a dedicated SQL Server interface for Elasticsearch, enabling data querying directly from Elasticsearch without the need to replicate data to a native database. With pre-optimized data processing capabilities, CData Connect AI efficiently directs all supported SQL operations, including filters and JOINs, directly to Elasticsearch. This harnesses server-side processing to swiftly retrieve the requested Elasticsearch data.

About Elasticsearch Data Integration

Accessing and integrating live data from Elasticsearch has never been easier with CData. Customers rely on CData connectivity to:

  • Access both the SQL endpoints and REST endpoints, optimizing connectivity and offering more options when it comes to reading and writing Elasticsearch data.
  • Connect to virtually every Elasticsearch instance starting with v2.2 and Open Source Elasticsearch subscriptions.
  • Always receive a relevance score for the query results without explicitly requiring the SCORE() function, simplifying access from 3rd party tools and easily seeing how the query results rank in text relevance.
  • Search through multiple indices, relying on Elasticsearch to manage and process the query and results instead of the client machine.

Users frequently integrate Elasticsearch data with analytics tools such as Crystal Reports, Power BI, and Excel, and leverage our tools to enable a single, federated access layer to all of their data sources, including Elasticsearch.

For more information on CData's Elasticsearch solutions, check out our Knowledge Base article: CData Elasticsearch Driver Features & Differentiators.


Getting Started


Configure Elasticsearch Connectivity for APOS Live Data Gateway

Connectivity to Elasticsearch from APOS Live Data Gateway is made possible through CData Connect AI. To work with Elasticsearch data from APOS Live Data Gateway, we start by creating and configuring a Elasticsearch connection.

  1. Log into Connect AI, click Sources, and then click Add Connection
    2. 👁 Adding a Connection
  2. Select "Elasticsearch" from the Add Connection panel
    3. 👁 Selecting a data source
  3. Enter the necessary authentication properties to connect to Elasticsearch.

    Set the Server and Port connection properties to connect. To authenticate, set the User and Password properties, PKI (public key infrastructure) properties, or both. To use PKI, set the SSLClientCert, SSLClientCertType, SSLClientCertSubject, and SSLClientCertPassword properties.

    The data provider uses X-Pack Security for TLS/SSL and authentication. To connect over TLS/SSL, prefix the Server value with 'https://'. Note: TLS/SSL and client authentication must be enabled on X-Pack to use PKI.

    Once the data provider is connected, X-Pack will then perform user authentication and grant role permissions based on the realms you have configured.

    👁 Configuring a connection (Salesforce is shown)
  4. Click Save & Test
  5. Navigate to the Permissions tab in the Add Elasticsearch Connection page and update the User-based permissions. 👁 Updating permissions

Add a Personal Access Token

When connecting to Connect AI through the REST API, the OData API, or the Virtual SQL Server, a Personal Access Token (PAT) is used to authenticate the connection to Connect AI. It is best practice to create a separate PAT for each service to maintain granularity of access.

  1. Click on the Gear icon () at the top right of the Connect AI app to open the settings page.
  2. On the Settings page, go to the Access Tokens section and click Create PAT.
  3. Give the PAT a name and click Create. 👁 Creating a new PAT
  4. The personal access token is only visible at creation, so be sure to copy it and store it securely for future use.

With the connection configured and a PAT generated, you are ready to connect to Elasticsearch data in the APOS Live Data Gateway.

Connecting to Elasticsearch & Creating a Semantic Layer View

After configuring the connection in CData Connect AI you are ready to connect to Elasticsearch in the Live Data Gateway Admin tool and build a semantic layer view in the Live Data Gateway Web UI.

Configuring the Connection to Elasticsearch

  1. Log into your APOS Live Data Gateway Manager 👁 Logging into the APOS LDG Manager
  2. If you haven't already, update your APOS LDG license file
    1. Click File -> Configurations
    2. Click on the "..." Menu for the License
    3. Select the license file from the APOS team that includes your CData Connect AI license
  3. In the APOS Live Data Gateway Manager, click "Add"
  4. In the APOS Live Data Gateway On the Connection tab, configure the connection:
    • Set Data Source to "Database"
    • Set Database to "JDBC Generic"
    • Set Connection String to a connection string similar to the following, using the name of the connection you configured earlier, e.g. 
      jdbc:sqlserver://tds.cdata.com:14333;databaseName=Elasticsearch1
    • Set Driver Class to "com.CData.connect.Driver" (this should be set by default)
    👁 Configuring the Connection (Salesforce is shown).
  5. Click Test Connection
  6. Click Save
  7. Give your connection a unique prefix (e.g. "elasticsearch")
  8. Highlight the newly created connection and click File -> "Approve Users For Web UI" 👁 Approving Users For Web UI.
  9. Approve the appropriate DB users to create views and click "Save" 👁 Configuring which DB users can create views.

At this point, we are ready to build our semantic layer view in the Live Data Gateway Web UI.

Creating a Semantic Layer View

  1. In your browser, navigate to the APOS Live Data Gateway Portal
  2. Select a Connection (e.g. "elasticsearch")
  3. Set User Name and Password to your Connect AI username and PAT .
  4. Click "Login" 👁 Connecting from the Web UI (Salesforce is shown).
  5. Once connected, click "Semantic Layer" to create a new semantic layer view
  6. Click "New Semantic Layer View" 👁 Adding a new semantic layer view.
  7. Set the Semantic Layer View Prefix and Semantic Layer View Name 👁 Setting the semantic layer view prefix and name.
  8. Click "Step 2"
  9. Select the table(s) and column(s) you wish to include in your view 👁 Selecting table(s) and column(s).
  10. Click "Step 3"
  11. Select the Measures from the available table columns 👁 Selecting the measure(s).
  12. Click "Step 5" (we skipped the "Extra Dimensions" step)
  13. Add any Variable Prompts
  14. Click "Step 6"
  15. Define any Table Joins
  16. Click "Review"
  17. Review you semantic layer view and click "Save" 👁 Saving the semantic layer view.

With the Semantic Layer View created, you are ready to access your Elasticsearch data through the APOS Live Data Gateway, enabling real-time data connectivity to Elasticsearch data from SAP Analytics Cloud and other SAP solutions.

Get CData Connect AI

To get live data access to hundreds of SaaS, Big Data, and NoSQL sources directly from your SQL Server database, try CData Connect AI today!