google-nomulus/java/google/registry/proxy/HealthCheckProtocolModule.java
jianglai 7e42ee48a4 Open source GCP proxy
Dagger updated to 2.13, along with all its dependencies.

Also allows us to have multiple config files for different environment (prod, sandbox, alpha, local, etc) and specify which one to use on the command line with a --env flag. Therefore the same binary can be used in all environments.

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Created by MOE: https://github.com/google/moe
MOE_MIGRATED_REVID=176551289
2017-11-21 19:19:03 -05:00

76 lines
2.7 KiB
Java

// Copyright 2017 The Nomulus Authors. All Rights Reserved.
//
// 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 google.registry.proxy;
import com.google.common.collect.ImmutableList;
import dagger.Module;
import dagger.Provides;
import dagger.multibindings.IntoSet;
import google.registry.proxy.Protocol.FrontendProtocol;
import google.registry.proxy.handler.HealthCheckHandler;
import io.netty.channel.ChannelHandler;
import io.netty.handler.codec.FixedLengthFrameDecoder;
import javax.inject.Provider;
import javax.inject.Qualifier;
import javax.inject.Singleton;
/**
* Module that provides a {@link FrontendProtocol} used for GCP load balancer health checking.
*
* <p>The load balancer sends health checking messages to the GCE instances to assess whether they
* are ready to receive traffic. No relay channel needs to be established for this protocol.
*/
@Module
public class HealthCheckProtocolModule {
/** Dagger qualifier to provide health check protocol related handlers and other bindings. */
@Qualifier
@interface HealthCheckProtocol {}
private static final String PROTOCOL_NAME = "health_check";
@Singleton
@Provides
@IntoSet
static FrontendProtocol provideProtocol(
@HealthCheckProtocol int healthCheckPort,
@HealthCheckProtocol ImmutableList<Provider<? extends ChannelHandler>> handlerProviders) {
return Protocol.frontendBuilder()
.name(PROTOCOL_NAME)
.port(healthCheckPort)
.isHealthCheck(true)
.handlerProviders(handlerProviders)
.build();
}
@Provides
@HealthCheckProtocol
static ImmutableList<Provider<? extends ChannelHandler>> provideHandlerProviders(
Provider<FixedLengthFrameDecoder> fixedLengthFrameDecoderProvider,
Provider<HealthCheckHandler> healthCheckHandlerProvider) {
return ImmutableList.of(fixedLengthFrameDecoderProvider, healthCheckHandlerProvider);
}
@Provides
static FixedLengthFrameDecoder provideFixedLengthFrameDecoder(ProxyConfig config) {
return new FixedLengthFrameDecoder(config.healthCheck.checkRequest.length());
}
@Provides
static HealthCheckHandler provideHealthCheckHandler(ProxyConfig config) {
return new HealthCheckHandler(
config.healthCheck.checkRequest, config.healthCheck.checkResponse);
}
}