Скачать или смотреть Resolving the Connection Refused Issue with Embedded PostgreSQL in Quarkus Testing

Learn how to fix the common connection error for embedded PostgreSQL in your Quarkus tests by correcting your application properties configuration.
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Troubleshooting Connection Issues with Embedded PostgreSQL in Quarkus Testing

As developers, we often face obstacles that can hinder our progress. One common issue is connecting to a database in a testing environment, particularly when using an embedded PostgreSQL instance in a Quarkus application. You might find yourself in a situation where your application defaults to trying to connect to localhost:5432 despite using an embedded database configured on a different port. In this guide, we'll explore the problem and provide a step-by-step guide to resolving it effectively.

Understanding the Problem

You have probably set up an embedded PostgreSQL database in your Quarkus project for testing purposes. Yet, when you execute your tests, the application attempts to connect to the default PostgreSQL port (localhost:5432) instead of the dynamically assigned port for your embedded database instance (for example, 45087). This issue can cause confusion and lead to connection errors, effectively blocking your tests from running successfully.

Symptoms

Test logs indicating connection failures to localhost:5432

Embedded PostgreSQL setup listening on a different port

This problem often arises due to configuration discrepancies in the application's properties.

Step-by-Step Solution

Here’s a breakdown of how to correctly configure your Quarkus project to establish a successful connection with an embedded PostgreSQL database during testing.

1. Review the PostgresDatabaseTestResource Class

In your PostgresDatabaseTestResource class, ensure that you’re utilizing the correct properties for the Quarkus datasource configuration. As indicated in the original code, you see:

[[See Video to Reveal this Text or Code Snippet]]

This line uses the deprecated datasource property.

2. Update Your Configuration

Instead, replace the deprecated property with the new syntax. Change the line in your PostgresDatabaseTestResource class to:

[[See Video to Reveal this Text or Code Snippet]]

It’s crucial to also ensure that if you're specifying a driver, you do it correctly:

[[See Video to Reveal this Text or Code Snippet]]

3. Modify Your application.properties

Next, inspect your application.properties file. Check for the usage of quarkus.datasource.jdbc.url. You want to ensure that the correct configurations are being utilized:

Instead of configuring as follows:

[[See Video to Reveal this Text or Code Snippet]]

Ensure you have removed or commented out the line that points to the localhost port, because it's misleading when you're utilizing an embedded instance. The connection string will be handled through your PostgresDatabaseTestResource class.

4. Verify and Run Your Tests

After making these changes, try running your tests again. Monitor the logs to ensure that they reference the correct port assigned to the embedded database. If there are no errors related to connection refusals, congratulations! You've successfully resolved the issue.

Recap

In summary, when dealing with embedded PostgreSQL in Quarkus, it's essential to ensure your configurations align with the latest standards to avoid connection issues:

Use quarkus.datasource.jdbc.url instead of the deprecated URL settings.

Specify the driver explicitly if necessary using quarkus.datasource.jdbc.driver.

Remove or correct any references in your configurations that point to localhost:5432.

By following these steps, you can overcome the hurdles presented during testing setups and forge ahead with confidence in your embedded PostgreSQL integration.

Happy coding!