Maven Artifact Resolver SPI 1.9.20 API

The contract to access artifacts/metadata in remote repositories.
The support infrastructure for repository connectors to apply checksum policies when validating the integrity of downloaded files.
The contract to locate URI-based resources using custom repository layouts.
The contract to download/upload URI-based resources using custom transport protocols.
I/O related support infrastructure for components.
The contract for custom local repository implementations.
A lightweight service locator infrastructure to help components acquire dependent components.
A simple logging infrastructure for diagnostic messages.
The contract for synchronization context implementations.