/*

* Copyright 2013 Netflix, 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 feign.ribbon;

import javax.inject.Named;

import javax.inject.Singleton;

import dagger.Provides;

import feign.Client;

/**

* Adding this module will override URL resolution of {@link feign.Client Feign's client}, adding

* smart routing and resiliency capabilities provided by Ribbon. <br> When using this, ensure the

* {@link feign.Target#url()} is set to as {@code http://clientName} or {@code https://clientName}.

* {@link com.netflix.client.config.IClientConfig#getClientName() clientName} will lookup the real

* url and port of your service dynamically. <br> Ex.

* <pre>

* MyService api = Feign.create(MyService.class, "http://myAppProd", new RibbonModule());

* </pre>

* Where {@code myAppProd} is the ribbon client name and {@code myAppProd.ribbon.listOfServers}

* configuration is set.

*/

@dagger.Module(overrides = true, library = true, complete = false)

public class RibbonModule {

@Provides

LBClientFactory lbClientFactory() {

return new LBClientFactory.Default();

}

@Provides

@Named("delegate")

Client delegate(Client.Default delegate) {

return delegate;

}

@Provides

@Singleton

Client httpClient(@Named("delegate") Client client, LBClientFactory lbClientFactory) {

return new RibbonClient(client, lbClientFactory);

}

}