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Add support for Authentication

See original GitHub issue

Allow to configure authentication method for the Kafka Connect cluster. I’ve done a quick test (clumpsy, I know) and works adding the ClientHeaderParam anotation at interface level. The values should be obtained from the configuration, obviously.

I’m not an expert in this REST Client library, and probably there is a better way to implement this solution.

Also, this is only covering BasicAuth and other authentication methods could be included as well.

If this is out of scope, don’t hesitate to close this one 😉

/*
 *  Copyright 2021 The original authors
 *
 *  Licensed under the Apache License, Version 2.0 (the "License");
 *  you may not use this file except in compliance with the License.
 *  You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 *  Unless required by applicable law or agreed to in writing, software
 *  distributed under the License is distributed on an "AS IS" BASIS,
 *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 *  See the License for the specific language governing permissions and
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package dev.morling.kccli.service;

import java.util.Base64;
import java.util.List;
import java.util.Map;

import javax.ws.rs.DELETE;
import javax.ws.rs.GET;
import javax.ws.rs.POST;
import javax.ws.rs.PUT;
import javax.ws.rs.Path;
import javax.ws.rs.PathParam;

import org.eclipse.microprofile.rest.client.annotation.ClientHeaderParam;
import org.eclipse.microprofile.rest.client.inject.RegisterRestClient;

@Path("/")
@RegisterRestClient
@ClientHeaderParam(name = "Authorization", value = "{getBasicAuth}")
public interface KafkaConnectApi {

    @GET
    KafkaConnectInfo getWorkerInfo();

    @GET
    @Path("/connector-plugins")
    List<ConnectorPlugin> getConnectorPlugins();

    @GET
    @Path("/connectors/")
    List<String> getConnectors();

    @POST
    @Path("/connectors/")
    ConnectorStatusInfo createConnector(String config);

    @GET
    @Path("/connectors/{name}")
    ConnectorInfo getConnector(@PathParam("name") String name);

    @POST
    @Path("/connectors/{name}/restart")
    void restartConnector(@PathParam("name") String name);

    @DELETE
    @Path("/connectors/{name}")
    void deleteConnector(@PathParam("name") String name);

    @GET
    @Path("/connectors/{name}/status")
    ConnectorStatusInfo getConnectorStatus(@PathParam("name") String name);

    @GET
    @Path("/connectors/{name}/topics")
    Map<String, TopicsInfo> getConnectorTopics(@PathParam("name") String name);

    @GET
    @Path("/connectors/{name}/config")
    Map<String, String> getConnectorConfig(@PathParam("name") String name);

    @PUT
    @Path("/connectors/{name}/config")
    ConnectorStatusInfo updateConnector(@PathParam("name") String name, String config);

    @POST
    @Path("/connectors/{name}/tasks/{id}/restart")
    ConnectorInfo restartTask(@PathParam("name") String name, @PathParam("id") String id);

    default String getBasicAuth() {
        return "Basic " +
                Base64.getEncoder().encodeToString("username:password".getBytes());
    }
}