Hi Team I am new to cassandara and I am working on an IOT project based on astradb cassandra and springboot.
I would like to point to multiple keyspaces on astra, could you please help with the details.
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I am using spring boot with Kubernetes and Eventhub. To connect with Azure Eventhub i use spring cloud stream. What is the math to determine the number of pods assuming non reactive spring boot application with apache tomcat?
Edit 1: to reframe my question, how do you factor in spring boot performance , request rate , user count, etc while scaling the pods?
In general the number of pods can be managed with a Deployment in Kubernetes. For more information you can see here kubernetes.io. In a Deployment you tell Kubernetes how many Replicas you want, which means how many Pods should be running. I don't know what you mean with non reactive spring boot application with apache tomcat. I also don't know about spring cloud stream.
I have been given an task where I have the Apache Spark SQL and they want me to expose out the result as SPring REST API's using Spring Boot.
Is this possible? What I would be given would be Spark SQL's.
The Data currently runs on our DataBricks, But then the data also needs to be exposed as REST API's.
Yes, you can do that. You can look up for Spring Spark integration.
https://docs.spring.io/spring-hadoop/docs/current/reference/html/springandhadoop-spark.html
Also, you can look at this question for more references.
https://docs.spring.io/spring-hadoop/docs/current/reference/html/springandhadoop-spark.html
I am trying to find some examples of Spring Cloud Data Flow and Azure Service Bus setup. .
I have found https://github.com/microsoft/spring-cloud-azure/tree/master/spring-cloud-azure-stream-binder/spring-cloud-azure-servicebus-topic-stream-binder but it is still in RC and I do not see any examples (which cover Spring Cloud Data Flow) there.
Could you please help me to understand if I can use Spring Cloud Data Flow and Azure Service Bus together?
I was able to run examples with Kafka and RabbitMQ, but I cannot find anything about Azure Service Bus that can be used as the integration solution for Spring Cloud Data Flow
Spring Cloud Data Flow doesn't necessarily need to know what messaging layer you choose to run your applications on. Hence, your question is more likely related to how one can run the application with Azure Service Bus using Spring Cloud Stream.
This is one such a sample: https://learn.microsoft.com/en-us/java/azure/spring-framework/configure-spring-cloud-stream-binder-java-app-azure-event-hub?view=azure-java-stable
Once the application is built using Spring Cloud Stream (using the Azure event hub binder), you can then manage these applications using Spring Cloud Data Flow as Streaming applications.
There are no much resources on this topic so thought to post it. Also I myself am trying to understand the different. Previously we just had only spring-boot application. So can anybody explain the difference.
Spring boot admin is nice monitoring dashboard for spring boot application. To feed data to this dashboard spring boot admin provide two approaches:
1) Using client library: client libary will send data to spring boot admin dashboard.
2) Use service discovery (eureka)
We are planning to move a Spring based application to Cloud Foundry.
The application currently uses WAS server and access data sources using JNDI lookup.
We are using spring features like MVC, AOP etc.
I have certain questions in mind :
Is it possible to switch to Tomcat and configure dataSources using Spring-cloud-connectors and possible conflicts we might run into ?
Currently , datasources are configured in XML files, Should I use the same XML files or switch to annotations.
Can anyone please provide some clarity over this and other known issues with this approach?
Spring Cloud Connectors are by far the easiest way to bind to data sources in Cloud Foundry. I would recommend converting your JNDI lookups to use these service connections as described here:
http://docs.cloudfoundry.org/buildpacks/java/spring-service-bindings.html
cloud foundry automatically reconfigures your datasource when it find a database service attached the cloud app. its super coooool....