Stream in real-time the MySQL database events, such as CRUD and DDL. That may be useful for building Data Warehouse, integration with monolith application on the database level, etc.
MysqlBinlogStream
.rawEvents[IO](binlogClient)
.through(streamEvents[IO](transactionState))
.evalTap(msg => logger.info(s"received $msg"))Refer to examples for complete snippet
- build docker image
sbt "project mysql-binlog-stream-examples" clean "docker:publishLocal"- run docker compose with MySql and example service
cd mysql-binlog-stream-examples
docker-compose -f docker-compose-mysql-it-mac.yaml up- open new console
- in new console
mysql -u 'root' --host=0.0.0.0 --port=3307 --password=''- try to insert new row in
SKUorVARIANTtable
use test;
insert into sku(id, sku) values(3, '123');- in the
docker-composeconsole you should see
example_1 | 02:35:58.734 [ioapp-compute-2] INFO application - received EventMessage(sku,1589596558000,create,8908ecfb63e4-bin.000007,415,true,{
example_1 | "id" : 3
example_1 | },{
example_1 | "before" : null,
example_1 | "after" : {
example_1 | "id" : 3,
example_1 | "sku" : "123"
example_1 | }
example_1 | })try to update some row and see what happens
Create:
{
"table" : "sku",
"timestamp" : 1554754028000,
"action" : "create",
"fileName" : "acd03b3a873f-bin.000003",
"offset" : 2177,
"endOfTransaction" : false,
"pk" : {
"id" : 5
},
"row" : {
"before" : null,
"after" : {
"id" : 5,
"sku" : "sku5"
}
}
}Update:
{
"table" : "sku",
"timestamp" : 1554754028000,
"action" : "create",
"fileName" : "acd03b3a873f-bin.000003",
"offset" : 2177,
"endOfTransaction" : false,
"pk" : {
"id" : 5
},
"row" : {
"before" : {
"id" : 5,
"sku" : "sku5"
},
"after" : {
"id" : 5,
"sku" : "new sku 5"
}
}
}Delete:
{
"table" : "sku",
"timestamp" : 1554754028000,
"action" : "create",
"fileName" : "acd03b3a873f-bin.000003",
"offset" : 2177,
"endOfTransaction" : false,
"pk" : {
"id" : 5
},
"row" : {
"before" : {
"id" : 5,
"sku" : "new sku 5"
},
"after" : null
}
}Truncate:
{
"table" : "sku",
"timestamp" : 1554754028000,
"action" : "truncate",
"fileName" : "acd03b3a873f-bin.000003",
"offset" : 2497,
"endOfTransaction" : true,
"pk" : null,
"row" : null
}- Scala
- FS2 Functional Streams for Scala
- circe - json streaming encoder/decoder
- doobie - database integration layer
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