Cosmos DB Connector for JAVAConnect to your Azure Cosmos DB databases to read, query, create, update, and delete documents and more! In this article you will learn how to quickly and efficiently integrate Cosmos DB data in JAVA. We will use high-performance Cosmos DB Connector to easily connect to Cosmos DB and then access the data inside JAVA. Let's follow the steps below to see how we can accomplish that! Cosmos DB Connector for JAVA is based on ZappySys API Driver which is part of ODBC PowerPack. It is a collection of high-performance ODBC drivers that enable you to integrate data in SQL Server, SSIS, a programming language, or any other ODBC-compatible application. ODBC PowerPack supports various file formats, sources and destinations, including REST/SOAP API, SFTP/FTP, storage services, and plain files, to mention a few. |
Connect to Cosmos DB in other apps
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Create Data Source in ZappySys Data Gateway based on API Driver
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Download and install ODBC PowerPack.
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Search for gateway in start menu and Open ZappySys Data Gateway:
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Go to Users Tab to add our first Gateway user. Click Add; we will give it a name tdsuser and enter password you like to give. Check Admin option and click OK to save. We will use these details later when we create linked server:
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Now we are ready to add a data source. Click Add, give data source a name (Copy this name somewhere, we will need it later) and then select Native - ZappySys API Driver. Finally, click OK. And it will create the Data Set for it and open the ZS driver UI.
CosmosDbDSN
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When the Configuration window appears give your data source a name if you haven't done that already, then select "Cosmos DB" from the list of Popular Connectors. If "Cosmos DB" is not present in the list, then click "Search Online" and download it. Then set the path to the location where you downloaded it. Finally, click Continue >> to proceed with configuring the DSN:
CosmosDbDSNCosmos DB -
Now it's time to configure the Connection Manager. Select Authentication Type, e.g. Token Authentication. Then select API Base URL (in most cases, the default one is the right one). More info is available in the Authentication section.
Steps how to get and use Cosmos DB credentials : API Key [Http]
Connecting to your Azure Cosmos DB data requires you to authenticate your REST API access. Follow the instructions below:- Go to your Azure portal homepage: https://portal.azure.com/.
- In the search bar at the top of the homepage, enter Azure Cosmos DB. In the dropdown that appears, select Azure Cosmos DB.
- Click on the name of the database account you want to connect to (also copy and paste the name of the database account for later use).
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On the next page where you can see all of the database account information, look along the left side and select Keys:
- On the Keys page, you will have two tabs: Read-write Keys and Read-only Keys. If you are going to write data to your database, you need to remain on the Read-write Keys tab. If you are only going to read data from your database, you should select the Read-only Keys tab.
- On the Keys page, copy the PRIMARY KEY value and paste it somewhere for later use (the SECONDARY KEY value may also be copied and used).
- Now go to SSIS package or ODBC data source and use this PRIMARY KEY in API Key authentication configuration.
- Enter the primary or secondary key you recorded in step 6 into the Primary or Secondary Key field.
- Then enter the database account you recorded in step 3 into the Database Account field.
- Next, enter or select the default database you want to connect to using the Defualt Database field.
- Continue by entering or selecting the default table (i.e. container/collection) you want to connect to using the Default Table (Container/Collection) field.
- Select the Test Connection button at the bottom of the window to verify proper connectivity with your Azure Devops account.
- If the connection test succeeds, select OK.
- Done! Now you are ready to use Asana Connector!
Fill in all required parameters and set optional parameters if needed:
CosmosDbDSNCosmos DBAPI Key [Http]https://[$Account$].documents.azure.comRequired Parameters Primary or Secondary Key Fill-in the parameter... Account Name (Case-Sensitive) Fill-in the parameter... Database Name (keep blank to use default) Case-Sensitive Fill-in the parameter... API Version Fill-in the parameter... Optional Parameters Default Table (needed to invoke #DirectSQL) -
Once the data source connection has been configured, it's time to configure the SQL query. Select the Preview tab and then click Query Builder button to configure the SQL query:
ZappySys API Driver - Cosmos DBConnect to your Azure Cosmos DB databases to read, query, create, update, and delete documents and more!CosmosDbDSN -
Start by selecting the Table or Endpoint you are interested in and then configure the parameters. This will generate a query that we will use in JAVA to retrieve data from Cosmos DB. Hit OK button to use this query in the next step.
#DirectSQL SELECT * FROM root where root.id !=null order by root._ts desc
Some parameters configured in this window will be passed to the Cosmos DB API, e.g. filtering parameters. It means that filtering will be done on the server side (instead of the client side), enabling you to get only the meaningful datamuch faster . -
Now hit Preview Data button to preview the data using the generated SQL query. If you are satisfied with the result, use this query in JAVA:
ZappySys API Driver - Cosmos DBConnect to your Azure Cosmos DB databases to read, query, create, update, and delete documents and more!CosmosDbDSN#DirectSQL SELECT * FROM root where root.id !=null order by root._ts desc
You can also access data quickly from the tables dropdown by selecting <Select table>.AWHERE
clause,LIMIT
keyword will be performed on the client side, meaning that thewhole result set will be retrieved from the Cosmos DB API first, and only then the filtering will be applied to the data. If possible, it is recommended to use parameters in Query Builder to filter the data on the server side (in Cosmos DB servers). -
Click OK to finish creating the data source.
Read data in Java from the DSN
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Java code to get the data:
"jdbc:sqlserver://localhost:5000;databasename=CosmosDbDSN;user=tdsuser;password=test" -
When you run the code it will make the API call and read the data:
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Here is Java program's code in text format:
//Step-1: Install ZappySys ODBC PowerPack and Configure Data Gateway //Step-2:Assuming the Microsoft SQL Server JDBC Driver is in below folder //C:\Program Files\Microsoft Jdbc Driver 6.0 for SQL Server\sqljdbc_6.0\enu\auth\x64 package padaone; import java.sql.*; public class zappy { public static void main(String[] args) { // Create a variable for the connection string. String connectionUrl = "jdbc:sqlserver://localhost:5000;databasename=CosmosDbDSN;user=test;password=test"; // Declare the JDBC objects. Connection con = null; Statement stmt = null; ResultSet rs = null; try { // Establish the connection. Class.forName("com.microsoft.sqlserver.jdbc.SQLServerDriver"); con = DriverManager.getConnection(connectionUrl); // Create and execute an SQL statement that returns some data. String SQL = "SELECT Country , SUM(UnitPrice * Quantity) Total " + "FROM value " + "GROUP BY Country " + "WITH (SRC='https://services.odata.org/V3/Northwind/Northwind.svc/Invoices?$format=json')"; stmt = con.createStatement(); rs = stmt.executeQuery(SQL); // Iterate through the data in the result set and display it. while (rs.next()) { System.out.println(rs.getString(1) + " " + rs.getString(2)); } } // Handle any errors that may have occurred. catch (Exception e) { e.printStackTrace(); } finally { if (rs != null) try { rs.close(); } catch (Exception e) {} if (stmt != null) try { stmt.close(); } catch (Exception e) {} if (con != null) try { con.close(); } catch (Exception e) {} } } }
Actions supported by Cosmos DB Connector
Learn how to perform common Cosmos DB actions directly in JAVA with these how-to guides:
- Create a document in the container
- Create Permission Token for a User (One Table)
- Create User for Database
- Delete a Document by Id
- Get All Documents for a Table
- Get All Users for a Database
- Get Database Information by Id or Name
- Get Document by Id
- Get List of Databases
- Get List of Tables
- Get table information by Id or Name
- Get table partition key ranges
- Get User by Id or Name
- Query documents using Cosmos DB SQL query language
- Update Document in the Container
- Upsert a document in the container
- Generic Request
- Generic Request (Bulk Write)
Conclusion
In this article we showed you how to connect to Cosmos DB in JAVA and integrate data without any coding, saving you time and effort. It's worth noting that ZappySys API Driver allows you to connect not only to Cosmos DB, but to any Java application that supports JDBC (just use a different JDBC driver and configure it appropriately).
We encourage you to download Cosmos DB Connector for JAVA and see how easy it is to use it for yourself or your team.
If you have any questions, feel free to contact ZappySys support team. You can also open a live chat immediately by clicking on the chat icon below.
Download Cosmos DB Connector for JAVA Documentation
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