/*
* Copyright © 2014 Cask Data, Inc.
*
* 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 limitations under
* the License.
*/
package co.cask.cdap.api;
import java.net.URL;
import javax.annotation.Nullable;
/**
* An interface for Discovery Service.
*/
public interface ServiceDiscoverer {
/**
* Discover the base URL for a Service, relative to which Service endpoints can be accessed
*
* @param applicationId Application name
* @param serviceId Service name
* @return URL for the discovered service or null if the service is not found
*/
@Nullable
URL getServiceURL(String applicationId, String serviceId);
/**
* Discover the base URL for a Service in the same application, relative to which Service endpoints can be accessed
*
* @param serviceId Service Name
* @return URL for the discovered service or null if the service is not found
*/
@Nullable
URL getServiceURL(String serviceId);
}