io.micronaut.discovery.DefaultServiceInstanceIdGenerator 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.discovery;
import io.micronaut.context.env.Environment;
import io.micronaut.runtime.server.EmbeddedServerInstance;
import javax.annotation.Nonnull;
import javax.inject.Singleton;
import java.util.Optional;
import java.util.StringJoiner;
/**
* The default implementation to generate Instance IDs.
*
* @author Graeme Rocher
* @since 1.0
*/
@Singleton
public class DefaultServiceInstanceIdGenerator implements ServiceInstanceIdGenerator {
/**
* Default constructor.
*/
protected DefaultServiceInstanceIdGenerator() {
}
@Nonnull
@Override
public String generateId(Environment environment, ServiceInstance serviceInstance) {
Optional cloudFoundryId = environment.getProperty("vcap.application.instance_id", String.class);
if (cloudFoundryId.isPresent()) {
return cloudFoundryId.get();
} else {
StringJoiner joiner = new StringJoiner(":");
String applicationName = serviceInstance.getId();
joiner.add(applicationName);
if (serviceInstance instanceof EmbeddedServerInstance) {
EmbeddedServerInstance esi = (EmbeddedServerInstance) serviceInstance;
Optional id = esi.getEmbeddedServer().getApplicationConfiguration().getInstance().getId();
if (id.isPresent()) {
joiner.add(id.get());
} else {
joiner.add(String.valueOf(esi.getPort()));
}
} else {
joiner.add(String.valueOf(serviceInstance.getPort()));
}
return joiner.toString();
}
}
}