Command Query Framework

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COMMAND QUERY FRAMEWORK EKO KURNIAWAN KHANNEDY

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WHAT IS CQRS? COMMAND QUERY FRAMEWORK

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COMMAND QUERY FRAMEWORK COMMAND QUERY RESPONSIBILITY SEGREGATION CUSTOMER SERVICE CUSTOMER READ SERVICE CUSTOMER WRITE SERVICE

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WHY CQRS? COMMAND QUERY FRAMEWORK

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COMMAND QUERY FRAMEWORK SLOW READ RESPONSE

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COMMAND QUERY FRAMEWORK SEARCH COMBINATIONS (1)

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COMMAND QUERY FRAMEWORK SEARCH COMBINATIONS (2) ▸ Order Id ▸ Order Id + Order Date ▸ Order Id + Order Date + Fraud Case Date ▸ Order Id + Order Date + Fraud Case Description ▸ Order Id + Order Date + Fraud Case Description + Risk ▸ Order Id + Order Date + Fraud Case Description + Risk + Task ▸ Order Id + Fraud Case Date ▸ …

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OUR SOLUTION COMMAND QUERY FRAMEWORK

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COMMAND QUERY FRAMEWORK PERSISTENCE DATABASE + SEARCH ENGINE CLIENT READ WRITE SOLR MONGODB / POSTGRESQL

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COMMAND QUERY FRAMEWORK READ TO SOLR ▸ Fast search by default. ▸ Only return Id from Solr, and get the content from MongoDB or PostgreSQL.

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COMMAND QUERY FRAMEWORK WRITE TO MONGODB / POSTGRESQL ▸ Fast write, because we don’t need to create many indexes anymore. ▸ Just ﬁndById() or ﬁndByIds(List)

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BUT… COMMAND QUERY FRAMEWORK

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COMMAND QUERY FRAMEWORK WE DON’T WANT TO CREATE MULTIPLE ENTITY/MODEL CLASS CUSTOMER MONGO / CUSTOMER POSTGRESQL CUSTOMER SOLR CUSTOMER MONGO SERVICE / CUSTOMER POSTGRESQL SERVICE CUSTOMER SOLR SERVICE

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COMMAND QUERY FRAMEWORK JUST CREATE ONE ENTITY/MODEL CLASS CUSTOMER CUSTOMER SERVICE MONGODB / POSTGRESQL SOLR

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COMMAND QUERY FRAMEWORK COMMAND QUERY FRAMEWORK

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COMMAND QUERY FRAMEWORK WHAT IS COMMAND QUERY FRAMEWORK? ▸ Small library that read all entity classes, and magically transform its to Solr data structures. ▸ Pluggable using @Annotation. ▸ For now, only support Apache Solr. ▸ ElasticSearch will be supported soon (waiting for GDN approval) :D

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COMMAND QUERY FRAMEWORK WHO IS USING IT? ▸ X-Fraud 2.0

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ENTITY MAPPING COMMAND QUERY FRAMEWORK

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COMMAND QUERY FRAMEWORK COMMAND QUERY ANNOTATIONS ▸ @QueryDocument for Entity Class. ▸ @QueryId for ID attribute. ▸ @QueryEmbedded for embed nested object. ▸ @QueryEmbeddedCollection for embed collections or array. ▸ @QueryIgnore if we don’t care the attribute. ▸ @QueryPattern for date format pattern.

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COMMAND QUERY FRAMEWORK @QUERYDOCUMENT

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COMMAND QUERY FRAMEWORK SUPPORT SUPPER CLASS

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COMMAND QUERY FRAMEWORK @QUERYEMBEDDED (1) - FROM CLASSES

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COMMAND QUERY FRAMEWORK @QUERYEMBEDDED (2) - TO SOLR

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COMMAND QUERY FRAMEWORK @QUERYEMBEDDEDCOLLECTION (1) - FROM CLASSES

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COMMAND QUERY FRAMEWORK @QUERYEMBEDDEDCOLLECTION (2) - TO SOLR

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COMMAND QUERY FRAMEWORK @QUERYPATTERN (1) FOR DATE, TIME OR TIMESTAMP

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COMMAND QUERY FRAMEWORK @QUERYPATTERN (2) TIME RESOLUTION

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COMMAND QUERY FRAMEWORK BE CAREFUL WITH INFINITE LOOP ATTRIBUTE (1) PARENT CHILD Children Grandchildren

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COMMAND QUERY FRAMEWORK BE CAREFUL WITH INFINITE LOOP ATTRIBUTE (2)

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COMMAND QUERY FRAMEWORK BE CAREFUL WITH INFINITE LOOP ATTRIBUTE (3) - PLEASE IGNORE IT

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SEARCH QUERY COMMAND QUERY FRAMEWORK

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COMMAND QUERY FRAMEWORK QUERIES CLASS

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COMMAND QUERY FRAMEWORK HOW TO USE QUERIES CLASS

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COMMAND QUERY FRAMEWORK QUERIES RESPONSE

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OTHER FEATURES COMMAND QUERY FRAMEWORK

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COMMAND QUERY FRAMEWORK ATTRIBUTES GENERATOR, GOOD FOR AUTOCOMPLETE

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COMMAND QUERY FRAMEWORK FIELD NAME FORMATTER (1)

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COMMAND QUERY FRAMEWORK FIELD NAME FORMATTER (2) - CHOOSE WHAT YOU WANT

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LIMITATION COMMAND QUERY FRAMEWORK

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COMMAND QUERY FRAMEWORK CURRENT LIMITATION ▸ We only support Apache Solr, not support ElasticSearch. ▸ We only support AND query operation. ▸ Minimum Java Version is 8.

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COMMAND QUERY FRAMEWORK PLEASE CONTRIBUTE ▸ https://stash.gdn-app.com/ ▸ Project: Sandbox ▸ Repository: Command Query

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THANKS

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COMMAND QUERY FRAMEWORK REFERENCES ▸ http://codebetter.com/gregyoung/2010/02/16/cqrs-task-based-uis-event- sourcing-agh/ ▸ http://martinfowler.com/bliki/CQRS.html ▸ http://tenmilesquare.com/command-query-responsibility-separation-with-a- relational-database-and-solr/