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/*
 * Copyright (c) 2014 Spotify AB.
 *
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you 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 com.spotify.helios.serviceregistration;

/**
 * A factory for {@link ServiceRegistrar} instances, and the entry point for service registrar
 * plugins. {@link ServiceRegistrarLoader} loads plugins by using {@link java.util.ServiceLoader}
 * to
 * look up {@link ServiceRegistrarFactory} from jar files and class loaders.
 */
public interface ServiceRegistrarFactory {

  /**
   * Create a service registrar connected to a registry at a specific address. The address format
   * and semantics are implementation dependent.
   *
   * @param address The address of the registry the registrar should connect to.
   * @return A registrar.
   */
  ServiceRegistrar create(String address);

  /**
   * Create a service registrar connected to a registry managing a specific domain. The domain
   * format and semantics are implementation dependent. This method is typically used when the
   * registry in turn is resolved using some service discovery mechanism, e.g. DNS SRV queries.
   *
   * @param domain The domain that the registry should be managing.
   * @return A registrar.
   */
  ServiceRegistrar createForDomain(String domain);
}