Dapr: Dinosaur or Developer's Dream? (JConf.dev)

Recently, the Dapr community released Dapr into the wild, aiming to simplify cloud-native application development. Dapr lets you abstract your distributed architecture from the underlying infrastructure that powers it. Forget about Kafka, RabbitMQ or any cloud-specific product: you’re talking with a pub/sub broker. Let Dapr take care of how it works. Want to switch later? Sure, no problem!

So, is Dapr the new J2EE application server? How could it change the way we develop distributed solutions? Join me in this talk to find out if we’re looking at a dinosaur in a fancy suit, or a developer’s dream.

Transcript

1. DAPR
   DINOSAUR OR
   
   DEVELOPER'S DREAM?
   #dapr Maarten Mulders (@mthmulders)
   

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2. COMPLEXITY....
   COMPLEXITY....
   COMPLEXITY....
   COMPLEXITY....
   COMPLEXITY....
   ESSENTIAL
   ESSENTIAL
   ESSENTIAL
   ESSENTIAL
   ESSENTIAL
   ACCIDENTAL
   ACCIDENTAL
   ACCIDENTAL
   ACCIDENTAL
   ACCIDENTAL
   #dapr Maarten Mulders (@mthmulders)
   

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3. #dapr Maarten Mulders (@mthmulders)
   

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4. #dapr Maarten Mulders (@mthmulders)
   

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5. 
   
   
   
   
   
   
   
   
   
   
   
   
   
   
   
   
   
   “
   “
   “
   “
   “
   Architecture is about making choices.
   But not
   Architecture is about making choices.
   But not
   Architecture is about making choices.
   But not
   Architecture is about making choices.
   But not
   Architecture is about making choices.
   But not
   too soon - later is better.
   too soon - later is better.
   too soon - later is better.
   too soon - later is better.
   too soon - later is better.
   #dapr Maarten Mulders (@mthmulders)
   

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6. 
   
   
   
   
   
   
   
   
   
   
   
   
   
   
   
   
   
   
   
   ...if only there were a
   
   standardised API for that!
   #dapr Maarten Mulders (@mthmulders)
   

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7. HERE BE DINOSAURS?!
   (Source: , December 2003,
   retrieved September 2021)
   “
   J2EE has emerged, since it was first released in
   1999, as an integrated standard for
   implementing and deploying portable, multi-
   tiered enterprise applications
   The All New J2EE 1.4 Platform
   #dapr Maarten Mulders (@mthmulders)
   

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8. #dapr Maarten Mulders (@mthmulders)
   

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9. Can't this be a little simpler...?
   #dapr Maarten Mulders (@mthmulders)
   

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10. DISTRIBUTED
    APPLICATION RUNTIME
    “
    An event-driven, portable runtime for building
    microservices on cloud and edge.
    #dapr Maarten Mulders (@mthmulders)
    

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11. INGREDIENTS
    (or: Buzzword Bingo)
    Open Source
    Polyglot
    Modular
    Pluggable
    Cloud-Native
    warning: may contain traces of nuts, gluten and other allergens.
    #dapr Maarten Mulders (@mthmulders)
    

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12. BUILDING BLOCK
    Describe cross-cutting concerns for building distributed systems,
    e.g.
    “
    my application needs to store data as key/value
    pairs
    #dapr Maarten Mulders (@mthmulders)
    

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13. BUILDING BLOCK API
    POST /v1.0/state/vehicles HTTP/1.1
    
    Host: localhost:3500
    
    Content-Type: application/json
    
    
    
    [
    { "key": "YH-52-VD",
    
    "value": "{\"licenseNumber\":\"YH-52-VD\",
    
    \"entryTimestamp\":\"2021-09-15T11:19:18\" }"
    
    }
    
    ]
    
    
    
    
    HTTP/1.1 204 No Content
    
    #dapr Maarten Mulders (@mthmulders)
    

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14. BUILDING BLOCK API
    GET /v1.0/state/vehicles/YH-52-VD HTTP/1.1
    
    Host: localhost:3500
    
    Accept: application/json
    
    
    
    HTTP/1.1 200 OK
    
    Content-Type: application/json
    
    
    
    "{
    
    \"licenseNumber\":\"YH-52-VD\",
    
    \"entryTimestamp\":\"2021-09-15T11:19:18.1781609\"
    
    }"
    
    #dapr Maarten Mulders (@mthmulders)
    

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15. #dapr Maarten Mulders (@mthmulders)
    

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16. #dapr Maarten Mulders (@mthmulders)
    

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17. #dapr Maarten Mulders (@mthmulders)
    

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18. SERVICE MESH ON STEROIDS
    SERVICE MESH ON STEROIDS
    SERVICE MESH ON STEROIDS
    SERVICE MESH ON STEROIDS
    SERVICE MESH ON STEROIDS
    “
    “
    “
    “
    “
    Service Mesh for PaaS
    Service Mesh for PaaS
    Service Mesh for PaaS
    Service Mesh for PaaS
    Service Mesh for PaaS
    
    
    
    
    
    
    
    
    
    --
    --
    --
    --
    -- @rmehmandarov
    @rmehmandarov
    @rmehmandarov
    @rmehmandarov
    @rmehmandarov
    #dapr Maarten Mulders (@mthmulders)
    

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19. DEMO: KEY/VALUE
    STORE
    #dapr Maarten Mulders (@mthmulders)
    

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20. #dapr Maarten Mulders (@mthmulders)
    

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21. #dapr Maarten Mulders (@mthmulders)
    

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22. 🤞🏻
    🤞🏻
    🤞🏻
    🤞🏻
    🤞🏻
    1. Start the Dapr sidecar
    2. Start the demo app
    3. Store / retrieve data
    #dapr Maarten Mulders (@mthmulders)
    

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23. COMPONENTS
    COMPONENTS
    COMPONENTS
    COMPONENTS
    COMPONENTS
    #dapr Maarten Mulders (@mthmulders)
    

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24. 1. State Store — key/value storage
    2. Service Invocation — invoke remote methods
    3. Pub/Sub — async message processing
    4. Bindings — interfaces to/from external integrations
    5. Secrets — various secret stores
    6. Name resolution — name resolution for service invocation
    7. Middleware — various filters on incoming Web requests
    
    
    
    
    Over 27 implementations available!
    #dapr Maarten Mulders (@mthmulders)
    

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25. SERVICE INVOCATION
    SERVICE INVOCATION
    SERVICE INVOCATION
    SERVICE INVOCATION
    SERVICE INVOCATION
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    #dapr Maarten Mulders (@mthmulders)
    

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26. PUB/SUB
    PUB/SUB
    PUB/SUB
    PUB/SUB
    PUB/SUB
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    #dapr Maarten Mulders (@mthmulders)
    

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27. BINDINGS
    BINDINGS
    BINDINGS
    BINDINGS
    BINDINGS
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    #dapr Maarten Mulders (@mthmulders)
    

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28. SECRETS
    SECRETS
    SECRETS
    SECRETS
    SECRETS
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    #dapr Maarten Mulders (@mthmulders)
    

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29. DEMO: SERVICE
    INVOCATION & OUTPUT
    BINDINGS
    #dapr Maarten Mulders (@mthmulders)
    

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30. #dapr Maarten Mulders (@mthmulders)
    

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31. 🤞🏻
    🤞🏻
    🤞🏻
    🤞🏻
    🤞🏻
    1. Start the Dapr sidecar
    2. Start the demo apps
    3. Simulate traffic
    🚗
    4. Receive speeding ticket
    😱
    #dapr Maarten Mulders (@mthmulders)
    

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32. OBSERVABILITY
    OBSERVABILITY
    OBSERVABILITY
    OBSERVABILITY
    OBSERVABILITY
    TRACING
    TRACING
    TRACING
    TRACING
    TRACING
    METRICS
    METRICS
    METRICS
    METRICS
    METRICS
    #dapr Maarten Mulders (@mthmulders)
    

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33. TRACING
    Inject custom headers (e.g. X-B3-TraceId and X-B3-SpanId) to
    measure execution throughout a chain.
    Zipkin collects those traces and provides visualisations.
    #dapr Maarten Mulders (@mthmulders)
    

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34. METRICS
    Application records metrics (numeric measurements)
    Prometheus collects (scrapes) measurements → time series
    Grafana hosts dashboards to visualise the time series
    #dapr Maarten Mulders (@mthmulders)
    

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35. METRICS
    Dapr exposes metrics about its own processes, such as:
    resource usage
    mTLS (certificate issuing)
    sidecar operations
    #dapr Maarten Mulders (@mthmulders)
    

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36. METRICS
    #dapr Maarten Mulders (@mthmulders)
    

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37. TRACING WITH DAPR SIDECAR
    POST /v1.0/invoke/vehicleregistrationservice/method/vehicleinfo/YH-52-VD
    
    Host: localhost:3500
    
    Content-Type: application/json
    
    X-DaprRequestId: b237d1da-beaa-42ef-b8c6-fcf38a900a21
    
    
    
    ... (omitted for brevity)
    
    #dapr Maarten Mulders (@mthmulders)
    

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38. THE DAPR SDK FOR JAVA
    Using io.dapr:dapr-sdk
    daprClient.invokeMethod(
    
    "vehicleregistrationservice",
    
    "vehicleinfo/" + licenseNumber,
    
    null, // no request body
    
    HttpExtension.GET, VehicleInfo.class
    
    ).contextWrite(
    
    /*
    
    * add tracing context from
    
    * e.g. OpenTracing or Spring Sleuth
    
    */
    
    );
    
    #dapr Maarten Mulders (@mthmulders)
    

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39. THE DAPR SDK FOR JAVA
    Using io.dapr:dapr-sdk-springboot
    @Topic(name = "speedingviolations", pubsubName = "pubsub")
    
    @PostMapping(path = "/collectfine")
    
    public ResponseEntity registerViolation(
    
    @RequestBody CloudEvent event
    
    ) {
    
    // ...
    
    }
    #dapr Maarten Mulders (@mthmulders)
    

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40. OBSERVABILITY
    OBSERVABILITY
    OBSERVABILITY
    OBSERVABILITY
    OBSERVABILITY
    🤞🏻
    🤞🏻
    🤞🏻
    🤞🏻
    🤞🏻
    1. Show Zipkin traces
    #dapr Maarten Mulders (@mthmulders)
    

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41. DINOSAUR OR
    DEVELOPER'S DREAM?
    #dapr Maarten Mulders (@mthmulders)
    

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42. DINOSAUR?
    BUSTED
    DEVELOPER'S DREAM?
    BUSTED
    #dapr Maarten Mulders (@mthmulders)
    

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43. DAPR — TAKE AWAYS
    1. Building blocks for distributed application integration patterns
    2. The sidecar brings you to places you've never been before
    3. Not a one-stop shop or Swiss army knife
    
    
    
    
    DIY Workshop: https://bit.ly/dapr-
    workshop-java
    #dapr Maarten Mulders (@mthmulders)
    

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44. IMAGE ATTRIBUTIONS
    electronic circuit board -
    infrastructure -
    SPECS-speed camera in Utrecht, The Netherlands -
    lego -
    airplane cockpit -
    https://pxhere.com/en/photo/941067
    https://pxhere.com/en/photo/1534169
    https://commons.wikimedia.org/wiki/File:Trajectcontrole.jpg
    https://pxhere.com/en/photo/1121211
    https://pxhere.com/en/photo/609377
    #dapr Maarten Mulders (@mthmulders)
    

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