Elek, Marton created HDDS-1743:
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Summary: Create service catalog endpoint in the SCM
Key: HDDS-1743
URL: https://issues.apache.org/jira/browse/HDDS-1743
Project: Hadoop Distributed Data Store
Issue Type: Sub-task
Components: SCM
Reporter: Elek, Marton
Assignee: Stephen O'Donnell
Based on the the design doc in the parent pom, we need a Service Catalog
endpoint in the SCM.
{code:java}
public interface ServiceRegistry {
void register(ServiceEndpoint endpoint) throws IOException;
ServiceEndpoint findEndpoint(String serviceName, int instanceId);
Collection<ServiceEndpoint> getAllServices();
}{code}
Where the ServiceEndpoint is something like this:
{code:java}
public class ServiceEndpoint {
private String host;
private String ip;
private ServicePort port;
private String serviceName;
private int instanceId;
...
}
public class ServicePort {
private ServiceProtocol protocol;
private String name;
private int port;
...
}
public enum ServiceProtocol {
RPC, HTTP, GRPC
}{code}
The ServiceRegistry may have multiple implementation, but as a first step we
need a simple implementation which calls a new endpoint on SCM via REST.
The endpoint should persist the data to a local Rocksdb with the help of
DBStore.
This task is about to create the server and client implementation. In a
follow-up Jira we can start to use the client on the om/datanode/client side to
mix the service discovery data with the existing configuration.
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