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0307c55f9f
To avoid having to either hard-code or manually configure service addresses (possibly several dozen), and to reduce the project's dependency on docker to deal with routing and discovery, the option to use [Zookeeper](https://zookeeper.apache.org/) to manage services and discovery has been added. A service registry interface was added, with a Zookeeper implementation and a basic implementation that only works on docker and hard-codes everything. The last remaining REST service, the assistant-service, has been migrated to gRPC. This also proved a good time to clear out primordial technical debt from the root of the codebase. The 'service-client' library has been taken behind the barn and given a last farewell. It's replaced by a small library for managing gRPC channels. Since it's no longer used by anything, RxJava has been removed as a dependency from the project. Although the current state seems reasonably stable, this is a work-in-progress commit. |
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Control Service
The control service provides an operator's user interface. By default this interface is exposed on port 8081. It does not offer any sort of access control or authentication.
The control service will itself execute tasks that affect the entire system, but delegate node-specific tasks to the corresponding executor-service via the executor-api.
Conceptually the application is broken into three parts:
- Application specific tasks relate to the high level abstractions such as blacklisting and API keys
- System tasks relate to low level abstractions such as the message queue and event log.
- Node tasks relate to index node specific tasks, such as crawling and indexing.
Central Classes
See Also
- processes
- libraries/message-queue - The Message Queue and Actor abstractions