gateway-server/src/main/java/org/apache/knox/gateway/services/factory/RemoteRegistryClientServiceFactory.java

/*
 * 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,
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 * See the License for the specific language governing permissions and
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package org.apache.knox.gateway.services.factory;


import java.util.Collection;
import java.util.Collections;
import java.util.Map;

import org.apache.knox.gateway.config.GatewayConfig;
import org.apache.knox.gateway.service.config.remote.RemoteConfigurationRegistryClientServiceFactory;
import org.apache.knox.gateway.service.config.remote.zk.ZooKeeperClientService;
import org.apache.knox.gateway.services.GatewayServices;
import org.apache.knox.gateway.services.Service;
import org.apache.knox.gateway.services.ServiceLifecycleException;
import org.apache.knox.gateway.services.ServiceType;
import org.apache.knox.gateway.services.config.client.RemoteConfigurationRegistryClientService;
import org.apache.knox.gateway.services.security.AliasService;

// There are two implementations of 'RemoteConfigurationRegistryClientService':
// - LocalFileSystemRemoteConfigurationRegistryClientService
// - CuratorClientService
// However, the first one - local - is for test-only purposes
public class RemoteRegistryClientServiceFactory extends AbstractServiceFactory {

  private final AliasServiceFactory aliasServiceFactory = new AliasServiceFactory();

  @Override
  protected Service createService(GatewayServices gatewayServices, ServiceType serviceType, GatewayConfig gatewayConfig, Map<String, String> options, String implementation)
      throws ServiceLifecycleException {
    Service service = null;
    if (shouldCreateService(implementation)) {
      service = RemoteConfigurationRegistryClientServiceFactory.newInstance(gatewayConfig);
      // it should be the 'default' alias service
      final AliasService localAliasService = (AliasService) aliasServiceFactory.create(gatewayServices, ServiceType.ALIAS_SERVICE, gatewayConfig, options, "");
      localAliasService.init(gatewayConfig, options);
      ((RemoteConfigurationRegistryClientService) service).setAliasService(localAliasService);
    }
    return service;
  }

  @Override
  protected ServiceType getServiceType() {
    return ServiceType.REMOTE_REGISTRY_CLIENT_SERVICE;
  }

  @Override
  protected Collection<String> getKnownImplementations() {
    return Collections.singleton(ZooKeeperClientService.class.getName());
  }

}