zipkin2.server.internal.eureka.ZipkinEurekaDiscoveryConfiguration Maven / Gradle / Ivy
/*
* Copyright 2015-2024 The OpenZipkin 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 zipkin2.server.internal.eureka;
import com.linecorp.armeria.server.eureka.EurekaUpdatingListener;
import com.linecorp.armeria.spring.ArmeriaServerConfigurator;
import org.springframework.boot.autoconfigure.condition.ConditionalOnClass;
import org.springframework.boot.context.properties.EnableConfigurationProperties;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Condition;
import org.springframework.context.annotation.ConditionContext;
import org.springframework.context.annotation.Conditional;
import org.springframework.context.annotation.Configuration;
import org.springframework.core.type.AnnotatedTypeMetadata;
/**
* Auto-configuration for {@link EurekaUpdatingListener}.
*
* See armeria-eureka documentation
*
See Eureka REST operations
*/
@ConditionalOnClass(EurekaUpdatingListener.class)
@Conditional(ZipkinEurekaDiscoveryConfiguration.EurekaServiceUrlSet.class)
@Configuration(proxyBeanMethods = false)
@EnableConfigurationProperties(ZipkinEurekaDiscoveryProperties.class)
public class ZipkinEurekaDiscoveryConfiguration {
@Bean EurekaUpdatingListener eurekaListener(ZipkinEurekaDiscoveryProperties eureka) {
return eureka.toBuilder().build();
}
@Bean ArmeriaServerConfigurator eurekaListenerConfigurator(EurekaUpdatingListener listener) {
return sb -> sb.serverListener(listener);
}
/**
* This condition passes when "zipkin.discovery.eureka.url" is set to non-empty.
*
*
This is here because the yaml defaults this property to empty like this, and spring-boot
* doesn't have an option to treat empty properties as unset.
*
*
{@code
* url: ${EUREKA_URL:}
* }
*/
static final class EurekaServiceUrlSet implements Condition {
@Override public boolean matches(ConditionContext context, AnnotatedTypeMetadata a) {
return !isEmpty(
context.getEnvironment().getProperty("zipkin.discovery.eureka.service-url")) &&
notFalse(context.getEnvironment().getProperty("zipkin.discovery.eureka.enabled"));
}
private static boolean isEmpty(String s) {
return s == null || s.isEmpty();
}
private static boolean notFalse(String s) {
return s == null || !s.equals("false");
}
}
}