Retry usage guidance

Consider the following guidelines when using retries in your MicroServices

• If you are using the REST API for inter-(micro)-service communication, retry the operation if the result code is 429 (Too Many Requests) or an error in the 5xx range. Do not retry for any other errors.
• For 429 errors, only retry after the time indicated in the Retry-After header.
• For 5xx errors, use exponential back-off, with the first retry at least 5 seconds(?) after the response.
• Do not retry on errors other than 429 and 5xx.

distributed tracing can be incredibly useful to diagnose problems, optimize code, and build more reliable services.

Terms:

• Message
• Queue
• Queue Manager
  A queue manager is a system program that provides queuing services to applications.
• Channels
• Message channel agent
• Publish/Subscribe

Continuous integration

Continuous integration (CI) is the practice of automating the integration of code changes from multiple contributors into a single software project. It’s a primary DevOps best practice, allowing developers to frequently merge code changes into a central repository where builds and tests then run. Automated tools are used to assert the new code’s correctness before integration.

A source code version control system is the crux of the CI process. The version control system is also supplemented with other checks like automated code quality tests, syntax style review tools, and more.