Service Registry pattern

Description

The Service Registry design pattern is a central service registry that maintains a database of available services. It acts as a lookup mechanism, allowing services to register themselves and clients to discover services. This pattern is crucial for service-oriented architectures (SOA) and microservices, facilitating dynamic discovery and decoupling of service consumers and providers.

Main Elements of the Pattern

1. Service Registry: A central database that holds the details of available services, such as their network locations and interfaces.
2. Service Provider: Registers its service with the service registry, providing metadata such as the service name, version, and network address.
3. Service Consumer: Queries the service registry to find services and obtain their metadata for consumption.
4. Heartbeat Mechanism: Ensures that the service registry has up-to-date information about the service availability through periodic heartbeat messages from the service providers.

References

• Service Registry Pattern - Microservices.io
• Project Contribution Guidelines

Acceptance Criteria

1. Implement a basic service registry that can register services and allow querying for service details.
2. Include a heartbeat mechanism for service providers to periodically update their status in the registry.
3. Provide example implementations of a service provider registering itself and a service consumer querying the registry.

No project files or tests are named. Start by reading the Project Contribution Guidelines and the linked Service Registry Pattern reference, then inspect existing Java pattern conventions in the repository. Done means a service registry supports registration, querying, heartbeat updates, and examples for both a provider and a consumer.