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Mauricio Salatino & Thomas Vitale
Spring I/O Barcelona
May 30th, 2024
Dapr and Spring Boot
Solving the Challenges of Distributed
Systems
@vitalethomas @salaboy
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Challenges
That you will phase
Distributed Systems
are complex
Developer
Productivity Su
ff
ers
writing YAML
Teams Expertise to
a whole new level
@salaboy @vitalethomas
https://www.diagrid.io/blog/dapr-for-spring-boot
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Let’s Start with a Demo
Based on https://github.com/dockersamples/example-voting-app @salaboy @vitalethomas
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Demo
@salaboy @vitalethomas
https://diagrid.ws/vote
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diagrid.io
• Software Engineer and CNCF
Ambassador.
• Author of “Platform
Engineering on Kubernetes”
(Manning).
• @DaprDev @KnativeProject
@KeptnProject
Mauricio Salatino
salaboy.com @Salaboy
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Systematic
• Software Engineer
• CNCF Ambassador, Oracle ACE
Pro, Testcontainers Community
Champion
• Author of “Cloud Native Spring
in Action” (Manning).
• OSS contributor (Java, Spring,
Cloud Native Technologies)
Thomas Vitale
thomasvitale.com @vitalethomas
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Where is the application deployed?
What is a Cloud-Native Runtime?
@salaboy @vitalethomas
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Where is the application deployed?
Is it Kubernetes?
@salaboy @vitalethomas
?
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Where is the application deployed?
Or Cloud Services?
@salaboy @vitalethomas
?
?
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Most likely you are using containers
@salaboy @vitalethomas
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Most likely you are using OCI containers
@salaboy @vitalethomas
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Containers save time
@salaboy @vitalethomas
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Shoutout to Testcontainers
@salaboy @vitalethomas
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If you look deeper
@salaboy @vitalethomas
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In a cloud native runtime
@salaboy @vitalethomas
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In a cloud native runtime
@salaboy @vitalethomas
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To make it more complicated…
@salaboy @vitalethomas
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Dapr, can we delegate more
responsibility to our cloud native
runtime?
@salaboy @vitalethomas
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Dapr - Distributed Application Runtime
@salaboy @vitalethomas
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How does it works?
@salaboy @vitalethomas
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How does it works?
@salaboy @vitalethomas
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How does it works?
@salaboy @vitalethomas
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How does it works?
@salaboy @vitalethomas
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But if you can do that.. you can also do this
@salaboy @vitalethomas
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But if you can do that.. you can also do this
@salaboy @vitalethomas
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How does it works?
@salaboy @vitalethomas
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How does it works?
@salaboy @vitalethomas
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How does it works?
@salaboy @vitalethomas
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What about local development?
I don’t want to deploy to
Kubernetes…
@salaboy @vitalethomas
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Without Kubernetes (with Testcontainers)
@salaboy @vitalethomas
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Let’s do some live coding…
@salaboy @vitalethomas
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This is good …
But can we make it more Bootiful?
@salaboy @vitalethomas
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How do we do this in Spring?
Spring Data -> https://github.com/spring-projects/spring-data-keyvalue
@salaboy @vitalethomas
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How do we do this in Spring?
Spring Data -> https://github.com/spring-projects/spring-data-keyvalue
@salaboy @vitalethomas
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How do we do this in Spring?
Spring Kafka -> https://github.com/spring-projects/spring-kafka
@salaboy @vitalethomas
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How do we do this in Spring?
Spring Pulsar -> https://github.com/spring-projects/spring-pulsar
@salaboy @vitalethomas
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How do we do this in Spring?
Spring AMQP (RabbitMQ)
@salaboy @vitalethomas
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To provide a better integration
we did the same for Dapr
@salaboy @vitalethomas
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(Show application code)
@salaboy @vitalethomas
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But there is more
@salaboy @vitalethomas
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Outbox Pattern
* Produce an event every time we store some data
* Do it transactionally
* If for some reason storing data fails,
the event shouldn’t be produced
@salaboy @vitalethomas
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Durable Exections / Workflows
* Sometimes we need more than just calling X services in a sequence
* We want to make sure that:
* If things fail we have a backup plan like: custom retries, circuit breakers
and domain-speci
fi
c logic hooks
* Support for long running and stateful interactions, for example waiting
for a human input that might be on holidays
* That we have compensation logic to undo operations
@salaboy @vitalethomas
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Let’s raffle some books!
@salaboy @vitalethomas
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Deployment
@salaboy @vitalethomas
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What about Deployments?
The platform team takes care of wiring up the available infrastructure
@salaboy @vitalethomas
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Thanks
@vitalethomas / @salaboy
@salaboy @vitalethomas
https://www.diagrid.io/blog/dapr-for-spring-boot