Next Generation MongoDB with Spring: Sessions, Streams, Transactions (WJax-2018)

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1. Next Generation mongoDB
   Christoph Strobl, Pivotal Software Inc.
   @stroblchristoph
   Sessions - Streams - Transactions
   

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2. Unless otherwise indicated, these slides are © 2013-2018 Pivotal Software, Inc.
   and licensed under a Creative Commons Attribution-NonCommercial license:
   http://creativecommons.org/licenses/by-nc/3.0/
   Next Generation MongoDB
   Christoph Strobl
   Software Engineer, Spring Data
   Sessions - Streams - Transactions
   

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3. Unless otherwise indicated, these slides are © 2013-2018 Pivotal Software, Inc.
   and licensed under a Creative Commons Attribution-NonCommercial license:
   http://creativecommons.org/licenses/by-nc/3.0/
   Christoph Strobl
   Fantasy Book Addict Workout Enthusiast
   Next Generation MongoDB
   Sessions - Streams - Transactions
   image: https://wall.alphacoders.com/

   License: PD
   

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4. Unless otherwise indicated, these slides are © 2013-2018 Pivotal Software, Inc.
   and licensed under a Creative Commons Attribution-NonCommercial license:
   http://creativecommons.org/licenses/by-nc/3.0/
   image: https://wall.alphacoders.com/

   License: PD
   

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5. Unless otherwise indicated, these slides are © 2013-2018 Pivotal Software, Inc.
   and licensed under a Creative Commons Attribution-NonCommercial license:
   http://creativecommons.org/licenses/by-nc/3.0/
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   {
   "authors": [
   "Peter V. Brett"
   ],
   "id": "f430cb49",
   "language": "English",
   "pages": 880,
   "publishDate": "2017-28-09",
   "publisherId": "Harper Collins Publishers",
   "stock": 3,
   "title": "The Core"
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6. Unless otherwise indicated, these slides are © 2013-2018 Pivotal Software, Inc.
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   {
   _id: "f430cb49",
   title: "The Core",
   author: [ "Peter V. Brett" ],
   published_date: ISODate("2017-09-28"),
   pages: 880,
   language: "English",
   publisher_id: "Harper Collins",
   available: 2
   checkout : [
   {by : "cstrobl", date : "2018-
   ]
   }
   $ http POST :8080/book/f430cb49/order
   HTTP/1.1 200 OK
   Content-Length: 267
   Content-Type: application/json;charset=UTF-8
   {
   "books": [ {
   "authors": [
   "Peter V. Brett"
   ],
   "id": "f430cb49",
   "language": "English",
   "pages": 880,
   "publishDate": "2017-28-09",
   "publisherId": "Harper Collins Publishers",
   "title": "The Core"
   } ],
   "customer": "cstrobl",
   "date": "2018-09-04"
   }
   

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7. Unless otherwise indicated, these slides are © 2013-2018 Pivotal Software, Inc.
   and licensed under a Creative Commons Attribution-NonCommercial license:
   http://creativecommons.org/licenses/by-nc/3.0/
   https://pixnio.com/de/landschaften/blatt-blatter/grunes-blatt-flora-natur-baum-sommer-garten

   License: PD
   Cart
   Cart Register Shipping Payment Confirmation
   3 copies available
   The Core
   $ http POST :8080/book/f430cb49/order
   HTTP/1.1 200 OK
   Content-Length: 267
   Content-Type: application/json;charset=UTF-8
   {
   "books": [ {
   "authors": [
   "Peter V. Brett"
   ],
   "id": "f430cb49",
   "language": "English",
   "pages": 880,
   "publishDate": "2017-28-09",
   "publisherId": "Harper Collins Publishers",
   "title": "The Core"
   } ],
   "customer": "cstrobl",
   "date": "2018-09-04"
   }
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   only 2 more copies available
   {
   "_id" : "5b8ee10e",
   "by" : "cstrobl",
   "date" : ISODate("2018-09-04"),
   "books" : [
   {
   "$ref" : "books",
   "$id" : "f430cb49"
   }
   ]
   }
   {
   _id: "f430cb49",
   title: "The Core",
   author: [ "Peter V. Brett" ],
   published_date: ISODate("2017-09-28"),
   pages: 880,
   language: "English",
   publisher_id: "Harper Collins",
   available: 2
   }
   

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8. Unless otherwise indicated, these slides are © 2013-2018 Pivotal Software, Inc.
   and licensed under a Creative Commons Attribution-NonCommercial license:
   http://creativecommons.org/licenses/by-nc/3.0/
   Multi Document Transactions
   image: http://www.intestasuimotori.it

   License: CC
   

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9. Unless otherwise indicated, these slides are © 2013-2018 Pivotal Software, Inc.
   and licensed under a Creative Commons Attribution-NonCommercial license:
   http://creativecommons.org/licenses/by-nc/3.0/
   https://pixnio.com/de/landschaften/blatt-blatter/grunes-blatt-flora-natur-baum-sommer-garten

   License: PD
   Requirements
   9
   // start transaction
   // update first collection
   // query second collection
   // update third collection
   // commit transaction
   • ACID
   • Conversational, multi-statement
   

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10. Unless otherwise indicated, these slides are © 2013-2018 Pivotal Software, Inc.
    and licensed under a Creative Commons Attribution-NonCommercial license:
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    License: PD
    How To Get From There to Here
    10
    Wired Tiger
    MVCC
    3.0 - 3.4
    

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11. Unless otherwise indicated, these slides are © 2013-2018 Pivotal Software, Inc.
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    License: PD
    How To Get From There to Here
    11
    Logical Sessions
    3.6
    Retryable Writes
    

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12. Unless otherwise indicated, these slides are © 2013-2018 Pivotal Software, Inc.
    and licensed under a Creative Commons Attribution-NonCommercial license:
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    License: PD
    How To Get From There to Here
    12
    update : { lsid : 1, txnNum : 1}, updates: […]
    update : { lsid : 1, txnNum : 1}, updates: […]
    { ok : 1}
    Retryable Writes
    IO Exception
    

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13. Unless otherwise indicated, these slides are © 2013-2018 Pivotal Software, Inc.
    and licensed under a Creative Commons Attribution-NonCommercial license:
    http://creativecommons.org/licenses/by-nc/3.0/
    https://pixnio.com/de/landschaften/blatt-blatter/grunes-blatt-flora-natur-baum-sommer-garten

    License: PD
    How To Get From There to Here
    13
    Replica Set Transactions
    Sharded Cluster Transactions
    4.0
    4.2 (under development)
    

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14. Unless otherwise indicated, these slides are © 2013-2018 Pivotal Software, Inc.
    and licensed under a Creative Commons Attribution-NonCommercial license:
    http://creativecommons.org/licenses/by-nc/3.0/
    https://github.com/christophstrobl/mongodb-bookstore
    image: https://wall.alphacoders.com/

    License: PD
    

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15. Unless otherwise indicated, these slides are © 2013-2018 Pivotal Software, Inc.
    and licensed under a Creative Commons Attribution-NonCommercial license:
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    https://pixnio.com/de/landschaften/blatt-blatter/grunes-blatt-flora-natur-baum-sommer-garten

    License: PD
    Known issues…
    15
    try(ClientSession session = client.startSession()) {
    session.startTransaction();
    Long result = collection.count(session, Filters.gt("available", 0));
    Bson nearSphereFilter = Filters.nearSphere("location", new Point(

    new Position(-73.99D, 40.73D)), 0.313D);
    Long result = collection.countDocuments(nearSphereFilter);
    Cannot run 'count' in a multi-document 

    transaction.
    Error 50851
    '$geoNear, $near, and $nearSphere

    are not allowed in this context'
    Error 2
    Long result = collection.countDocuments(session, Filters.gt("available", 0));
    Bson nearSphereFilter = Filters.geoWithinCenterSphere("location", -73.99D, 40.73D, 0.313D);
    Long result = collection.countDocuments(nearSphereFilter);
    

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16. Unless otherwise indicated, these slides are © 2013-2018 Pivotal Software, Inc.
    and licensed under a Creative Commons Attribution-NonCommercial license:
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    https://pixnio.com/de/landschaften/blatt-blatter/grunes-blatt-flora-natur-baum-sommer-garten

    License: PD
    Reactive Multi Document Transactions
    16
    return mongoOperations.inTransaction().execute(action "-> {
    return action.save(order)
    .flatMap(order "-> {
    return action.update(Book.class)
    .matching(query(
    where("id").is(book.id)
    .and("available").gt(0)))
    .apply(new Update().inc("available", -1)).first()
    .flatMap(result "-> {
    if (result.getModifiedCount() "== 0) {
    throw new BookSoldOutException(book);
    }
    return Mono.just(order);
    });
    });
    }).next();
    Flux.usingWhen(() "-> session,
    ClientSession"::commitTransaction,
    ClientSession"::abortTransaction,
    session "-> … )
    @Transactional
    public Mono insertDocuments()
    @Deprecated
    public ReactiveSessionScoped inTransaction()
    

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17. Unless otherwise indicated, these slides are © 2013-2018 Pivotal Software, Inc.
    and licensed under a Creative Commons Attribution-NonCommercial license:
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    License: PD
    Summary & Outlook
    17
    Transactions are multi-document, multi-collection, conversational.
    They fit in well to existing Spring transaction paradigms.

    

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18. > Stay Connected.
    MongoDB 4.0 & SpringData Lovelace Releases are out now!

    Get started with Spring Boot 2.1.M4.
    https://www.mongodb.com/transactions
    http://projects.spring.io/spring-data-mongodb/
    

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19. Unless otherwise indicated, these slides are © 2013-2018 Pivotal Software, Inc.
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    19
    

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