Is there a way to use Spring Cloud Sleuth with OpenTracing? I want to connect Spring clients with Jaeger
Spring Sleuth is now OpenTracing compatible. All you have to do is use OpenTracing Jars in your class path.
You can then use Sleuth-Zipkin to send instrumentation data to Jaeger's Zipkin collector.
This way you achieve everything you want with minimal configuration.
You can use my sample program as an example here:
https://github.com/anoophp777/spring-webflux-jaegar-log4j2
There's an ongoing discussion over here - https://github.com/spring-cloud/spring-cloud-sleuth/issues/599 . In general we don't explicitly use the OpenTracing API but we are Zipkin compatible in terms of header propagation. You can also manipulate the header names as you wish so if any sort of library you're using requires other header names for span / trace etc. then you can set it yourself as you want to.
Related
I was going through the documentation but couldn't find anything related to this, so I'm here just to confirm with you.
We'd like to partition Rabbit queues using Spring Cloud Stream, but would like to do so without using routing keys for it. Is there a way to do it by using headers or properties in the messages?
RabbitMQ plugins allow this but, does spring cloud stream allow it in some way?
Thanks and regards.
You can manually provision whatever exchange type you want and set the declareExchange property to false.
All,
I'm running a simple SpringBoot app in PCF using a Rabbit on-demand service. The auto reconfiguration of the ConnectionFactory for the internal Rabbit service works just fine.
However I need a list of all queues on the Rabbit host. AFAIK this is only available through a call to the Rabbit management plugin (a REST API), see RabbitManagementTemplate::getQueues. This class expects an http URI with credentials.
I know the URI+credentials are exposed through the vcap.service variables as "http_api_uri', but I wonder if there's a more elegant way to get an instance of RabbitManagentTemplate with Spring magic cloud connectors / auto reconfiguration instead of manually reading the env vars and writing custom bean config.
It seems the ConnectionFactory only knows about the AMQP interface, and cannot create a RabbitManagementTemplate?
Thanks!
Spring Cloud Connectors won't help you here. It doesn't support setting up RabbitManagementTemplate, only a ConnectionFactory.
You don't have to parse the env yourself, you can use the flattened properties that Boot provides such as vcap.services.rabbitmq.credentials.http_api_uri. But you'll need to configure a RabbitManagementTemplate yourself using those Boot properties.
wanted to try some new stuff and decided to build next micro-app in Ktor + Koin + Exposed. Everything looks really nice but I found one problem that is actually destroying the whole idea.
App needs DB access and the connection cannot be stored within repository but should be encrypted on config-server. Every other micro-app is suing spring boot and fetches configs with lib spring-cloud-config-client but I don't know if it's even possible to use that somehow from Ktor app. Anyone had the same problem and managed to fix it somehow?
Cfg4j seems to be an alternative to Spring Cloud Config Server.
https://github.com/cfg4j/cfg4j
Other than that, there are a few articles and some questions on SO about integrating Spring Cloud Config Server with non Spring Boot projects.
Spring Cloud Config Client Without Spring Boot
Also, I am working on an external configuration parser for Kotlin and am considering to implement similar functionality.
can anyone point me to a resource, how I can get spring-webflux and javamelody to work together?
Seems, that a servletcontext is neccessary for startup, which I don't have/need.
I'm aware of the coll metrics stuff, that comes with spring-boot 2.x, but I don't have anything to display the metrics with, and am locked to a company environment, where just installing something isn't a valid option.
Thanks,
Henning
javamelody is mainly based on monitoring of memory, cpu, http requests, sql requests and spring components among other things. See javamelody-spring-boot-starter for example.
But as far as I know, Spring webflux does not use the servlet api. So what do you want to monitor?
If you just want to have graphs in a browser, then start a http server for javamelody reports like in standalone. And if you also want to monitor sql requests and spring components, then add in your application all methods from this example, except monitoringSessionListener and monitoringFilter.
A new spring-boot-starter for javamelody in webflux could be created if it makes sense.
Spring Boot publishes all metrics events to a message channel "metricsChannel" when a dependency on spring-messaging is present. In my project I am using Apache Camel along with RabbitMQ as the broker. Is there any way to consume these metrics messages using purely Camel and not spring integration?
I can see Apache Camel has a component SpringIntegration, however I would like to know if there is a way to directly access these messages via the RabbitMQ component or do I have to add dependency on the camel component spring-integration as well?
It would be far easier for you to implement MetricChannel and do whatever you want with Camel instead of trying to bridge a result with Spring integration. Look at MessageChannelMetricWriter, the implementation is quite straightforward.