I have been trying for hours unsuccessfully to get my Spring Boot application's Camel routes (via the Camel component camel-google-pubsub to connect to a local instance of Google Pubsub Emulator.
- My emulator is running :
❯ gcloud beta emulators pubsub start --host-port=localhost:8085 --project=local
Executing: /usr/lib/google-cloud-sdk/platform/pubsub-emulator/bin/cloud-pubsub-emulator --host=localhost --port=8085
[pubsub] This is the Google Pub/Sub fake.
[pubsub] Implementation may be incomplete or differ from the real system.
[pubsub] déc. 01, 2020 6:14:32 PM com.google.cloud.pubsub.testing.v1.Main main
[pubsub] INFO: IAM integration is disabled. IAM policy methods and ACL checks are not supported
[pubsub] déc. 01, 2020 6:14:33 PM com.google.cloud.pubsub.testing.v1.Main main
[pubsub] INFO: Server started, listening on 8085
My env var is ok :
PUBSUB_EMULATOR_HOST=localhost:8085and I have disabledGOOGLE_APPLICATION_CREDENTIALSin order to avoid a connection to the real PubSub instanceMy Camel route :
@Component
public class MapperInRoute extends ESBRouteBuilder {
private final String dlFuncTopic;
private final String subscription;
private final String routeName;
private final String getLinksTopic;
public MapperInRoute(
final MapperInRouteConfiguration config,
@Value("${routes.get-links-topic}") final String getLinksTopic
) {
this.dlFuncTopic = config.getDlFuncTopic();
this.subscription = config.getSubscription();
this.routeName = config.getName();
this.getLinksTopic = getLinksTopic;
}
@Override
public void configure() {
from(format("google-pubsub:{{gcp.pubsub.project-id}}:%s", subscription))
.routeId(routeName)
// my route code
.to(format("google-pubsub:{{gcp.pubsub.project-id}}:%s", getLinksTopic))
;
}
}
- My
application-dev.yml:
gcp.pubsub.project-id: local
spring.cloud.gcp.pubsub:
emulator-host: localhost:8085
project-id: local
camel.component.google-pubsub.connection-factory.serviceURL: localhost:8085
And finally when I try to run my app locally, my console output is like that :
2020-12-03 12:17:58 INFO | Starting Application using Java 11.0.2 on lasouche-vm with PID 78394 (/home/mathieu/git/rocher/omnichannel/esb/poc-omega/target/classes started by mathieu in /home/mathieu/git/rocher/omnichannel/esb/poc-omega)
2020-12-03 12:17:58 INFO | The following profiles are active: dev
2020-12-03 12:17:59 INFO | Type converters loaded (core: 195, classpath: 10)
2020-12-03 12:17:59 WARN | UT026010: Buffer pool was not set on WebSocketDeploymentInfo, the default pool will be used
2020-12-03 12:17:59 INFO | Initializing Spring embedded WebApplicationContext
2020-12-03 12:17:59 INFO | Root WebApplicationContext: initialization completed in 1696 ms
2020-12-03 12:18:00 INFO | Registered '/actuator/jolokia' to jolokia-actuator-endpoint
2020-12-03 12:18:00 INFO | Initialising hawtio services
2020-12-03 12:18:00 INFO | Configuration will be discovered via system properties
2020-12-03 12:18:00 INFO | Welcome to Hawtio 2.10.0
2020-12-03 12:18:00 INFO | Initializing ExecutorService 'applicationTaskExecutor'
2020-12-03 12:18:00 INFO | Adding welcome page: class path resource [static/index.html]
2020-12-03 12:18:00 INFO | The default project ID is omega-lab-e5727d
2020-12-03 12:18:00 INFO | Failed to detect whether we are running on Google Compute Engine.
2020-12-03 12:18:00 WARN | No core credentials are set. Service-specific credentials (e.g., spring.cloud.gcp.pubsub.credentials.*) should be used if your app uses services that require credentials.
java.io.IOException: The Application Default Credentials are not available. They are available if running in Google Compute Engine. Otherwise, the environment variable GOOGLE_APPLICATION_CREDENTIALS must be defined pointing to a file defining the credentials. See https://developers.google.com/accounts/docs/application-default-credentials for more information.
at com.google.auth.oauth2.DefaultCredentialsProvider.getDefaultCredentials(DefaultCredentialsProvider.java:134)
at com.google.auth.oauth2.GoogleCredentials.getApplicationDefault(GoogleCredentials.java:119)
at com.google.auth.oauth2.GoogleCredentials.getApplicationDefault(GoogleCredentials.java:91)
at com.google.api.gax.core.GoogleCredentialsProvider.getCredentials(GoogleCredentialsProvider.java:67)
at org.springframework.cloud.gcp.core.DefaultCredentialsProvider.<init>(DefaultCredentialsProvider.java:110)
at org.springframework.cloud.gcp.autoconfigure.core.GcpContextAutoConfiguration.googleCredentials(GcpContextAutoConfiguration.java:61)
[...]
2020-12-03 12:18:04 INFO | Initializing ExecutorService 'pubsubPublisherThreadPool'
2020-12-03 12:18:05 INFO | Initializing ExecutorService 'pubsubSubscriberThreadPool'
2020-12-03 12:18:05 INFO | Initializing ExecutorService 'pubSubAcknowledgementExecutor'
2020-12-03 12:18:05 INFO | Exposing 7 endpoint(s) beneath base path '/actuator'
2020-12-03 12:18:06 INFO | Initialized CamelHttpTransportServlet[name=CamelServlet, contextPath=]
2020-12-03 12:18:06 INFO | Starting hawtio authentication filter, JAAS authentication disabled
2020-12-03 12:18:06 INFO | starting server: Undertow - 2.2.2.Final
2020-12-03 12:18:06 INFO | XNIO version 3.8.0.Final
2020-12-03 12:18:06 INFO | XNIO NIO Implementation Version 3.8.0.Final
2020-12-03 12:18:06 INFO | JBoss Threads version 3.1.0.Final
2020-12-03 12:18:06 INFO | Undertow started on port(s) 8080 (http)
2020-12-03 12:18:06 INFO | Loading additional Camel XML routes from: classpath:camel/*.xml
2020-12-03 12:18:06 INFO | Loading additional Camel XML rests from: classpath:camel-rest/*.xml
2020-12-03 12:18:06 INFO | Apache Camel 2.25.2 (CamelContext: camel-1) is starting
2020-12-03 12:18:06 INFO | JMX is enabled
2020-12-03 12:18:06 INFO | StreamCaching is not in use. If using streams then its recommended to enable stream caching. See more details at http://camel.apache.org/stream-caching.html
2020-12-03 12:18:13 INFO | Apache Camel 2.25.2 (CamelContext: camel-1) is shutting down
2020-12-03 12:18:13 INFO | Apache Camel 2.25.2 (CamelContext: camel-1) uptime 7.045 seconds
2020-12-03 12:18:13 INFO | Apache Camel 2.25.2 (CamelContext: camel-1) is shutdown in 0.080 seconds
2020-12-03 12:18:13 INFO | stopping server: Undertow - 2.2.2.Final
2020-12-03 12:18:13 INFO | Destroying hawtio authentication filter
2020-12-03 12:18:13 INFO | Destroyed CamelHttpTransportServlet[CamelServlet]
2020-12-03 12:18:13 INFO | Destroying hawtio services
2020-12-03 12:18:13 INFO |
Error starting ApplicationContext. To display the conditions report re-run your application with 'debug' enabled.
2020-12-03 12:18:13 ERROR | Application run failed
org.apache.camel.RuntimeCamelException: org.apache.camel.FailedToCreateRouteException: Failed to create route esb-poc-omega-consumer: Route(esb-poc-omega-consumer)[[From[file:/data/loyalty/from/... because of Failed to create Producer for endpoint: google-pubsub://local:POC.OMEGA.CONSUMER.OUT. Reason: java.io.IOException: The Application Default Credentials are not available. They are available if running on Google App Engine, Google Compute Engine, or Google Cloud Shell. Otherwise, the environment variable GOOGLE_APPLICATION_CREDENTIALS must be defined pointing to a file defining the credentials. See https://developers.google.com/accounts/docs/application-default-credentials for more information.
at org.apache.camel.util.ObjectHelper.wrapRuntimeCamelException(ObjectHelper.java:1826)
at org.apache.camel.spring.SpringCamelContext.start(SpringCamelContext.java:136)
at org.apache.camel.spring.SpringCamelContext.onApplicationEvent(SpringCamelContext.java:174)
at org.springframework.context.event.SimpleApplicationEventMulticaster.doInvokeListener(SimpleApplicationEventMulticaster.java:203)
at org.springframework.context.event.SimpleApplicationEventMulticaster.invokeListener(SimpleApplicationEventMulticaster.java:196)
at org.springframework.context.event.SimpleApplicationEventMulticaster.multicastEvent(SimpleApplicationEventMulticaster.java:161)
at org.springframework.context.support.AbstractApplicationContext.publishEvent(AbstractApplicationContext.java:426)
at org.springframework.context.support.AbstractApplicationContext.publishEvent(AbstractApplicationContext.java:383)
at org.springframework.context.support.AbstractApplicationContext.finishRefresh(AbstractApplicationContext.java:945)
at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:591)
at org.springframework.boot.web.servlet.context.ServletWebServerApplicationContext.refresh(ServletWebServerApplicationContext.java:144)
at org.springframework.boot.SpringApplication.refresh(SpringApplication.java:767)
at org.springframework.boot.SpringApplication.refresh(SpringApplication.java:759)
at org.springframework.boot.SpringApplication.refreshContext(SpringApplication.java:426)
at org.springframework.boot.SpringApplication.run(SpringApplication.java:326)
at org.springframework.boot.SpringApplication.run(SpringApplication.java:1309)
at org.springframework.boot.SpringApplication.run(SpringApplication.java:1298)
at com.grouperocher.esb.pocfuse7.Application.main(Application.java:13)
Caused by: org.apache.camel.FailedToCreateRouteException: Failed to create route esb-poc-omega-consumer: Route(esb-poc-omega-consumer)[[From[file:/data/loyalty/from/... because of Failed to create Producer for endpoint: google-pubsub://local:POC.OMEGA.CONSUMER.OUT. Reason: java.io.IOException: The Application Default Credentials are not available. They are available if running on Google App Engine, Google Compute Engine, or Google Cloud Shell. Otherwise, the environment variable GOOGLE_APPLICATION_CREDENTIALS must be defined pointing to a file defining the credentials. See https://developers.google.com/accounts/docs/application-default-credentials for more information.
at org.apache.camel.impl.RouteService.warmUp(RouteService.java:147)
at org.apache.camel.impl.DefaultCamelContext.doWarmUpRoutes(DefaultCamelContext.java:3954)
at org.apache.camel.impl.DefaultCamelContext.safelyStartRouteServices(DefaultCamelContext.java:3861)
at org.apache.camel.impl.DefaultCamelContext.doStartOrResumeRoutes(DefaultCamelContext.java:3647)
at org.apache.camel.impl.DefaultCamelContext.doStartCamel(DefaultCamelContext.java:3488)
at org.apache.camel.impl.DefaultCamelContext$4.call(DefaultCamelContext.java:3247)
at org.apache.camel.impl.DefaultCamelContext$4.call(DefaultCamelContext.java:3243)
at org.apache.camel.impl.DefaultCamelContext.doWithDefinedClassLoader(DefaultCamelContext.java:3266)
at org.apache.camel.impl.DefaultCamelContext.doStart(DefaultCamelContext.java:3243)
at org.apache.camel.support.ServiceSupport.start(ServiceSupport.java:72)
at org.apache.camel.impl.DefaultCamelContext.start(DefaultCamelContext.java:3159)
at org.apache.camel.spring.SpringCamelContext.start(SpringCamelContext.java:133)
... 16 common frames omitted
Caused by: org.apache.camel.FailedToCreateProducerException: Failed to create Producer for endpoint: google-pubsub://local:POC.OMEGA.CONSUMER.OUT. Reason: java.io.IOException: The Application Default Credentials are not available. They are available if running on Google App Engine, Google Compute Engine, or Google Cloud Shell. Otherwise, the environment variable GOOGLE_APPLICATION_CREDENTIALS must be defined pointing to a file defining the credentials. See https://developers.google.com/accounts/docs/application-default-credentials for more information.
at org.apache.camel.impl.ProducerCache.doGetProducer(ProducerCache.java:572)
[...]
Caused by: java.io.IOException: The Application Default Credentials are not available. They are available if running on Google App Engine, Google Compute Engine, or Google Cloud Shell. Otherwise, the environment variable GOOGLE_APPLICATION_CREDENTIALS must be defined pointing to a file defining the credentials. See https://developers.google.com/accounts/docs/application-default-credentials for more information.
at com.google.api.client.googleapis.auth.oauth2.DefaultCredentialProvider.getDefaultCredential(DefaultCredentialProvider.java:98)
at com.google.api.client.googleapis.auth.oauth2.GoogleCredential.getApplicationDefault(GoogleCredential.java:217)
at com.google.api.client.googleapis.auth.oauth2.GoogleCredential.getApplicationDefault(GoogleCredential.java:195)
at org.apache.camel.component.google.pubsub.GooglePubsubConnectionFactory.createDefault(GooglePubsubConnectionFactory.java:127)
at org.apache.camel.component.google.pubsub.GooglePubsubConnectionFactory.buildClient(GooglePubsubConnectionFactory.java:101)
at org.apache.camel.component.google.pubsub.GooglePubsubConnectionFactory.buildClient(GooglePubsubConnectionFactory.java:76)
at org.apache.camel.component.google.pubsub.GooglePubsubConnectionFactory.getDefaultClient(GooglePubsubConnectionFactory.java:60)
at org.apache.camel.component.google.pubsub.GooglePubsubEndpoint.afterPropertiesSet(GooglePubsubEndpoint.java:96)
at org.apache.camel.component.google.pubsub.GooglePubsubEndpoint.createProducer(GooglePubsubEndpoint.java:104)
at org.apache.camel.impl.ProducerCache.doGetProducer(ProducerCache.java:561)
... 118 common frames omitted
2020-12-03 12:18:13 INFO | Shutting down ExecutorService 'pubSubAcknowledgementExecutor'
2020-12-03 12:18:13 INFO | Shutting down ExecutorService 'pubsubSubscriberThreadPool'
2020-12-03 12:18:13 INFO | Shutting down ExecutorService 'pubsubPublisherThreadPool'
2020-12-03 12:18:13 INFO | Shutting down ExecutorService 'applicationTaskExecutor'
Disconnected from the target VM, address: '127.0.0.1:42485', transport: 'socket'
Process finished with exit code 1
If somebody has already succeeded to use the pubsub emulator with their Camel routes, I am interested in your solution.
I have no clue about Google pub/sub, but the error message says
I guess for the simulator you have to define the environment variable
GOOGLE_APPLICATION_CREDENTIALSas the error message suggests.There is also a Google developer page with further details mentioned in the error message.
EDIT
Looking at the Camel-Google-PubSub docs, there is an endpoint-option called
endpoint. And it is described asHave you tried to set your local emulator endpoint as