/* * Copyright (c) 2016-2020 Michael Zhang <[email protected]> * * Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated * documentation files (the "Software"), to deal in the Software without restriction, including without limitation the * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to * permit persons to whom the Software is furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in all copies or substantial portions of the * Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE * WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR * COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. */ package net.devh.boot.grpc.client.autoconfigure; import org.springframework.boot.actuate.health.Health; import org.springframework.boot.actuate.health.HealthIndicator; import org.springframework.boot.autoconfigure.AutoConfigureAfter; import org.springframework.boot.autoconfigure.condition.ConditionalOnClass; import org.springframework.context.annotation.Bean; import org.springframework.context.annotation.Configuration; import org.springframework.context.annotation.Lazy; import com.google.common.collect.ImmutableMap; import io.grpc.ConnectivityState; import net.devh.boot.grpc.client.channelfactory.GrpcChannelFactory; /** * Auto configuration class for Spring-Boot. This allows zero config client health status updates for gRPC services. * * @author Daniel Theuke ([email protected]) */ @Configuration @AutoConfigureAfter(GrpcClientAutoConfiguration.class) @ConditionalOnClass(name = "org.springframework.boot.actuate.health.HealthIndicator") public class GrpcClientHealthAutoConfiguration { /** * Creates a HealthIndicator based on the channels' {@link ConnectivityState}s from the underlying * {@link GrpcChannelFactory}. * * @param factory The factory to derive the connectivity states from. * @return A health indicator bean, that uses the following assumption * <code>DOWN == states.contains(TRANSIENT_FAILURE)</code>. */ @Bean @Lazy public HealthIndicator grpcChannelHealthIndicator(final GrpcChannelFactory factory) { return () -> { final ImmutableMap<String, ConnectivityState> states = ImmutableMap.copyOf(factory.getConnectivityState()); final Health.Builder health; if (states.containsValue(ConnectivityState.TRANSIENT_FAILURE)) { health = Health.down(); } else { health = Health.up(); } return health.withDetails(states) .build(); }; } }