I've implemented simple application to understand how spring cloud config for client.
It is just contains 2 classes:
Main:
@SpringBootApplication
public class ClientApplication {
public static void main(String[] args) {
SpringApplication.run(ClientApplication.class, args);
}
}
and controller:
@RefreshScope
@RestController
public class ExampleController {
@Value("${example.message:none}")
private String message;
@GetMapping("/message")
public String getMessage() {
return this.message;
}
}
and application.properies file:
server.port = 8080
# Customize the Pub/Sub Topic to be used as the message bus.
spring.cloud.gcp.project-id=spring-samples-269912
spring.cloud.bus.destination=cloud-bus-demo-topic
spring.cloud.config.uri=http://35.202.199.184
spring.cloud.gcp.credentials.location=file:secret.json
build.gradle:
buildscript { // Configuration for building
repositories {
jcenter() // Bintray's repository - a fast Maven Central mirror & more
mavenCentral()
}
dependencies {
classpath 'com.google.cloud.tools:appengine-gradle-plugin:2.2.0' // Latest 1.x.x release
}
}
plugins {
id 'org.springframework.boot' version '2.2.5.RELEASE'
id 'java'
id 'com.google.cloud.tools.jib' version '2.1.0'
}
apply plugin: 'java'
apply plugin: 'io.spring.dependency-management'
apply plugin: 'com.google.cloud.tools.appengine'
group = 'my.config.server'
version = '0.0.1-SNAPSHOT'
sourceCompatibility = '11'
repositories {
mavenCentral()
maven { url "https://repo.spring.io/milestone/" }
}
dependencies {
implementation 'org.springframework.boot:spring-boot-starter'
implementation 'org.springframework.cloud:spring-cloud-gcp-starter-bus-pubsub'
implementation 'org.springframework.cloud:spring-cloud-config-client'
}
test {
useJUnitPlatform()
}
dependencyManagement {
imports {
mavenBom "org.springframework.cloud:spring-cloud-dependencies:Hoxton.SR1"
mavenBom "org.springframework.cloud:spring-cloud-gcp-dependencies:1.2.1.RELEASE"
}
}
appengine {
deploy { // deploy configuration
stopPreviousVersion = true // default - stop the current version
promote = true // default - & make this the current version
projectId = 'spring-samples-269912' // delegate to project in gcloud config
version = 'GCLOUD_CONFIG' // delegate to gcloud to generate a version
}
}
jib {
to {
image = "us.gcr.io/spring-samples-269912/config-client-image"
auth {
username = "_json_key"
password = file("secret.json").text
}
}
}
But when I run I see following:
. ____ _ __ _ _
/\\ / ___'_ __ _ _(_)_ __ __ _ \ \ \ \
( ( )\___ | '_ | '_| | '_ \/ _` | \ \ \ \
\\/ ___)| |_)| | | | | || (_| | ) ) ) )
' |____| .__|_| |_|_| |_\__, | / / / /
=========|_|==============|___/=/_/_/_/
:: Spring Boot :: (v2.2.5.RELEASE)
2020-03-16 16:13:59.255 INFO 8948 --- [ main] c.c.c.ConfigServicePropertySourceLocator : Fetching config from server at : http://localhost:8888
2020-03-16 16:13:59.995 INFO 8948 --- [ main] c.c.c.ConfigServicePropertySourceLocator : Located environment: name=application, profiles=[default], label=null, version=abd4f2a3e1193705ae692a7217db894772525277, state=null
2020-03-16 16:13:59.995 INFO 8948 --- [ main] b.c.PropertySourceBootstrapConfiguration : Located property source: [BootstrapPropertySource {name='bootstrapProperties-configClient'}, BootstrapPropertySource {name='bootstrapProperties-git://github.com/gredwhite/config-repo-demo.git/application.properties'}]
2020-03-16 16:13:59.999 INFO 8948 --- [ main] my.config.client.ClientApplication : No active profile set, falling back to default profiles: default
2020-03-16 16:14:00.347 INFO 8948 --- [ main] o.s.cloud.context.scope.GenericScope : BeanFactory id=30c969b5-0fdd-3bcc-953b-09ef7014e64c
2020-03-16 16:14:00.364 INFO 8948 --- [ main] faultConfiguringBeanFactoryPostProcessor : No bean named 'errorChannel' has been explicitly defined. Therefore, a default PublishSubscribeChannel will be created.
2020-03-16 16:14:00.367 INFO 8948 --- [ main] faultConfiguringBeanFactoryPostProcessor : No bean named 'taskScheduler' has been explicitly defined. Therefore, a default ThreadPoolTaskScheduler will be created.
2020-03-16 16:14:00.370 INFO 8948 --- [ main] faultConfiguringBeanFactoryPostProcessor : No bean named 'integrationHeaderChannelRegistry' has been explicitly defined. Therefore, a default DefaultHeaderChannelRegistry will be created.
2020-03-16 16:14:00.384 INFO 8948 --- [ main] trationDelegate$BeanPostProcessorChecker : Bean 'org.springframework.integration.config.IntegrationManagementConfiguration' of type [org.springframework.integration.config.IntegrationManagementConfiguration] is not eligible for getting processed by all BeanPostProcessors (for example: not eligible for auto-proxying)
2020-03-16 16:14:00.385 INFO 8948 --- [ main] trationDelegate$BeanPostProcessorChecker : Bean 'org.springframework.boot.autoconfigure.integration.IntegrationAutoConfiguration$IntegrationJmxConfiguration' of type [org.springframework.boot.autoconfigure.integration.IntegrationAutoConfiguration$IntegrationJmxConfiguration] is not eligible for getting processed by all BeanPostProcessors (for example: not eligible for auto-proxying)
2020-03-16 16:14:00.390 INFO 8948 --- [ main] trationDelegate$BeanPostProcessorChecker : Bean 'org.springframework.boot.autoconfigure.jmx.JmxAutoConfiguration' of type [org.springframework.boot.autoconfigure.jmx.JmxAutoConfiguration] is not eligible for getting processed by all BeanPostProcessors (for example: not eligible for auto-proxying)
2020-03-16 16:14:00.393 INFO 8948 --- [ main] trationDelegate$BeanPostProcessorChecker : Bean 'mbeanServer' of type [com.sun.jmx.mbeanserver.JmxMBeanServer] is not eligible for getting processed by all BeanPostProcessors (for example: not eligible for auto-proxying)
2020-03-16 16:14:00.399 INFO 8948 --- [ main] trationDelegate$BeanPostProcessorChecker : Bean 'integrationChannelResolver' of type [org.springframework.integration.support.channel.BeanFactoryChannelResolver] is not eligible for getting processed by all BeanPostProcessors (for example: not eligible for auto-proxying)
2020-03-16 16:14:00.399 INFO 8948 --- [ main] trationDelegate$BeanPostProcessorChecker : Bean 'integrationDisposableAutoCreatedBeans' of type [org.springframework.integration.config.annotation.Disposables] is not eligible for getting processed by all BeanPostProcessors (for example: not eligible for auto-proxying)
2020-03-16 16:14:01.400 INFO 8948 --- [ main] o.s.c.g.core.DefaultCredentialsProvider : Default credentials provider for service account spring-samples-service-account@spring-samples-269912.iam.gserviceaccount.com
2020-03-16 16:14:01.400 INFO 8948 --- [ main] o.s.c.g.core.DefaultCredentialsProvider : Scopes in use by default credentials: [https://www.googleapis.com/auth/pubsub, https://www.googleapis.com/auth/spanner.admin, https://www.googleapis.com/auth/spanner.data, https://www.googleapis.com/auth/datastore, https://www.googleapis.com/auth/sqlservice.admin, https://www.googleapis.com/auth/devstorage.read_only, https://www.googleapis.com/auth/devstorage.read_write, https://www.googleapis.com/auth/cloudruntimeconfig, https://www.googleapis.com/auth/trace.append, https://www.googleapis.com/auth/cloud-platform, https://www.googleapis.com/auth/cloud-vision, https://www.googleapis.com/auth/bigquery]
2020-03-16 16:14:01.401 INFO 8948 --- [ main] o.s.c.g.a.c.GcpContextAutoConfiguration : The default project ID is spring-samples-269912
2020-03-16 16:14:01.409 INFO 8948 --- [ main] o.s.s.c.ThreadPoolTaskScheduler : Initializing ExecutorService 'pubsubPublisherThreadPool'
2020-03-16 16:14:01.411 INFO 8948 --- [ main] o.s.s.c.ThreadPoolTaskScheduler : Initializing ExecutorService 'pubsubSubscriberThreadPool'
2020-03-16 16:14:01.428 INFO 8948 --- [ main] o.s.s.concurrent.ThreadPoolTaskExecutor : Initializing ExecutorService 'pubSubAcknowledgementExecutor'
2020-03-16 16:14:01.811 INFO 8948 --- [ main] o.s.s.c.ThreadPoolTaskScheduler : Initializing ExecutorService 'taskScheduler'
2020-03-16 16:14:01.908 INFO 8948 --- [ main] o.s.i.monitor.IntegrationMBeanExporter : Registering MessageChannel errorChannel
2020-03-16 16:14:01.948 INFO 8948 --- [ main] o.s.i.monitor.IntegrationMBeanExporter : Registering MessageChannel springCloudBusInput
2020-03-16 16:14:01.966 INFO 8948 --- [ main] o.s.i.monitor.IntegrationMBeanExporter : Registering MessageChannel springCloudBusOutput
2020-03-16 16:14:01.972 INFO 8948 --- [ main] o.s.i.monitor.IntegrationMBeanExporter : Registering MessageChannel nullChannel
2020-03-16 16:14:01.981 INFO 8948 --- [ main] o.s.i.monitor.IntegrationMBeanExporter : Registering MessageHandler errorLogger
2020-03-16 16:14:02.000 INFO 8948 --- [ main] o.s.c.s.m.DirectWithAttributesChannel : Channel 'application-1.springCloudBusInput' has 1 subscriber(s).
2020-03-16 16:14:02.001 INFO 8948 --- [ main] o.s.i.endpoint.EventDrivenConsumer : Adding {logging-channel-adapter:_org.springframework.integration.errorLogger} as a subscriber to the 'errorChannel' channel
2020-03-16 16:14:02.001 INFO 8948 --- [ main] o.s.i.channel.PublishSubscribeChannel : Channel 'application-1.errorChannel' has 1 subscriber(s).
2020-03-16 16:14:02.001 INFO 8948 --- [ main] o.s.i.endpoint.EventDrivenConsumer : started bean '_org.springframework.integration.errorLogger'
2020-03-16 16:14:02.380 INFO 8948 --- [ main] c.c.c.ConfigServicePropertySourceLocator : Fetching config from server at : http://35.202.199.184
2020-03-16 16:14:03.015 INFO 8948 --- [ main] c.c.c.ConfigServicePropertySourceLocator : Located environment: name=application, profiles=[default], label=null, version=abd4f2a3e1193705ae692a7217db894772525277, state=null
2020-03-16 16:14:03.015 INFO 8948 --- [ main] b.c.PropertySourceBootstrapConfiguration : Located property source: [BootstrapPropertySource {name='bootstrapProperties-configClient'}, BootstrapPropertySource {name='bootstrapProperties-git://github.com/gredwhite/config-repo-demo.git/application.properties'}]
2020-03-16 16:14:04.268 INFO 8948 --- [ main] o.s.c.s.m.DirectWithAttributesChannel : Channel 'application-1.springCloudBusOutput' has 1 subscriber(s).
2020-03-16 16:14:10.152 INFO 8948 --- [ main] o.s.c.stream.binder.BinderErrorChannel : Channel 'anonymous.cloud-bus-demo-topic.0c7beefc-5850-4cb5-8b1d-3779305910eb.errors' has 1 subscriber(s).
2020-03-16 16:14:10.153 INFO 8948 --- [ main] o.s.c.stream.binder.BinderErrorChannel : Channel 'anonymous.cloud-bus-demo-topic.0c7beefc-5850-4cb5-8b1d-3779305910eb.errors' has 0 subscriber(s).
2020-03-16 16:14:10.153 INFO 8948 --- [ main] o.s.c.stream.binder.BinderErrorChannel : Channel 'anonymous.cloud-bus-demo-topic.0c7beefc-5850-4cb5-8b1d-3779305910eb.errors' has 1 subscriber(s).
2020-03-16 16:14:10.153 INFO 8948 --- [ main] o.s.c.stream.binder.BinderErrorChannel : Channel 'anonymous.cloud-bus-demo-topic.0c7beefc-5850-4cb5-8b1d-3779305910eb.errors' has 2 subscriber(s).
2020-03-16 16:14:10.179 INFO 8948 --- [ main] .s.c.g.p.i.i.PubSubInboundChannelAdapter : started org.springframework.cloud.gcp.pubsub.integration.inbound.PubSubInboundChannelAdapter@10b67f54
2020-03-16 16:14:10.196 INFO 8948 --- [ main] my.config.client.ClientApplication : Started ClientApplication in 12.181 seconds (JVM running for 13.372)
2020-03-16 16:14:10.201 INFO 8948 --- [extShutdownHook] .s.c.g.p.i.i.PubSubInboundChannelAdapter : stopped org.springframework.cloud.gcp.pubsub.integration.inbound.PubSubInboundChannelAdapter@10b67f54
2020-03-16 16:14:13.941 INFO 8948 --- [extShutdownHook] o.s.i.monitor.IntegrationMBeanExporter : Registering MessageChannel anonymous.cloud-bus-demo-topic.0c7beefc-5850-4cb5-8b1d-3779305910eb.errors
2020-03-16 16:14:13.990 INFO 8948 --- [extShutdownHook] o.s.c.stream.binder.BinderErrorChannel : Channel 'application-1.anonymous.cloud-bus-demo-topic.0c7beefc-5850-4cb5-8b1d-3779305910eb.errors' has 1 subscriber(s).
2020-03-16 16:14:13.990 INFO 8948 --- [extShutdownHook] o.s.c.stream.binder.BinderErrorChannel : Channel 'application-1.anonymous.cloud-bus-demo-topic.0c7beefc-5850-4cb5-8b1d-3779305910eb.errors' has 0 subscriber(s).
2020-03-16 16:14:13.991 INFO 8948 --- [extShutdownHook] o.s.i.endpoint.EventDrivenConsumer : Removing {logging-channel-adapter:_org.springframework.integration.errorLogger} as a subscriber to the 'errorChannel' channel
2020-03-16 16:14:13.991 INFO 8948 --- [extShutdownHook] o.s.i.channel.PublishSubscribeChannel : Channel 'application-1.errorChannel' has 0 subscriber(s).
2020-03-16 16:14:13.991 INFO 8948 --- [extShutdownHook] o.s.i.endpoint.EventDrivenConsumer : stopped bean '_org.springframework.integration.errorLogger'
2020-03-16 16:14:13.991 INFO 8948 --- [extShutdownHook] o.s.s.c.ThreadPoolTaskScheduler : Shutting down ExecutorService 'taskScheduler'
2020-03-16 16:14:13.994 INFO 8948 --- [extShutdownHook] o.s.s.concurrent.ThreadPoolTaskExecutor : Shutting down ExecutorService 'pubSubAcknowledgementExecutor'
2020-03-16 16:14:13.994 INFO 8948 --- [extShutdownHook] o.s.s.c.ThreadPoolTaskScheduler : Shutting down ExecutorService 'pubsubSubscriberThreadPool'
2020-03-16 16:14:13.995 INFO 8948 --- [extShutdownHook] o.s.s.c.ThreadPoolTaskScheduler : Shutting down ExecutorService 'pubsubPublisherThreadPool'
2020-03-16 16:14:13.996 INFO 8948 --- [extShutdownHook] o.s.i.monitor.IntegrationMBeanExporter : Summary on shutdown: bean 'errorChannel'
2020-03-16 16:14:13.996 INFO 8948 --- [extShutdownHook] o.s.i.monitor.IntegrationMBeanExporter : Summary on shutdown: bean 'springCloudBusInput'
2020-03-16 16:14:13.996 INFO 8948 --- [extShutdownHook] o.s.i.monitor.IntegrationMBeanExporter : Summary on shutdown: bean 'springCloudBusOutput'
2020-03-16 16:14:13.996 INFO 8948 --- [extShutdownHook] o.s.i.monitor.IntegrationMBeanExporter : Summary on shutdown: nullChannel
2020-03-16 16:14:13.996 INFO 8948 --- [extShutdownHook] o.s.i.monitor.IntegrationMBeanExporter : Summary on shutdown: bean '_org.springframework.integration.errorLogger.handler' for component '_org.springframework.integration.errorLogger'
Application shutdowns just after startup. Config server works well because http://35.202.199.184/example.message/default (this URL is public available) responds with correct response.
How to fix it?
I had the same issue and by following the answer posted here my issue was resolved. The reason is that you didn't add the Spring Starter Web dependency in your project so there was no web server instance created for your application, which will keep the application alive, hence after registering itself with the discovery server its job is done and it shut down the application. Just add the following lines in your build.gradle file: -
dependencies {
implementation 'org.springframework.boot:spring-boot-starter-web'
//other dependencies
}