io.micronaut.health.HeartbeatDiscoveryClientCondition Maven / Gradle / Ivy
/*
* Copyright 2017-2019 original authors
*
* 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 io.micronaut.health;
import io.micronaut.context.ApplicationContext;
import io.micronaut.context.condition.Condition;
import io.micronaut.context.condition.ConditionContext;
import io.micronaut.core.annotation.Introspected;
import io.micronaut.discovery.CompositeDiscoveryClient;
import io.micronaut.discovery.DiscoveryClient;
import io.micronaut.inject.BeanDefinition;
import java.util.Collection;
import static java.lang.Boolean.TRUE;
/**
* Custom condition to conditionally enable the heart beat.
*
* @author graemerocher
* @since 1.1
*/
@Introspected
public final class HeartbeatDiscoveryClientCondition implements Condition {
@Override
public boolean matches(ConditionContext context) {
final ApplicationContext beanContext = (ApplicationContext) context.getBeanContext();
final Boolean enabled = beanContext.getProperty(HeartbeatConfiguration.ENABLED, Boolean.class).orElse(TRUE);
if (enabled) {
return true;
}
final Collection> discoveryClients = beanContext.getBeanDefinitions(DiscoveryClient.class);
final boolean hasDiscovery = discoveryClients.stream()
.anyMatch(bean -> !CompositeDiscoveryClient.class.isAssignableFrom(bean.getBeanType()));
if (hasDiscovery) {
return true;
} else {
context.fail("Heartbeat not enabled since no Discovery client active");
return false;
}
}
}