Mysql for SCN persistance #87
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chavdar
suggested changes
Feb 4, 2017
| @@ -16,6 +16,7 @@ dependencies { | |||
| compile externalDependency.json | |||
| compile externalDependency.log4j | |||
| compile externalDependency.netty | |||
| compile 'com.mchange:c3p0:0.9.5' | |||
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Can you move the dependency definition to subprojects.gradle in the "ext.externalDependency" array:
'c3p0': 'com.mchange:c3p0:0.9.5'
In this build.gradle, you add
compile externalDependency.c3p0
chavdar
approved these changes
Feb 6, 2017
|
Thank you @rahuljoshi123 ! |
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As of now, file and in memory MaxSCNReaderWriter are supported. If a machine goes down, in memory and local file system SCN is lost. Added mysql MaxSCNReaderWriter for fault tolerance and reliable persistence of SCN.
Others using databus might find this as useful. Please let me know your thoughts on this.
Added flexibility to declare schema of scn table and queries.
Note : Please don't add this scn table in source database and set flushItvl=1, it will cause an infinite loop.
Example configs :
databus.relay.dataSources.sequenceNumbersHandler.type=MYSQL
databus.relay.dataSources.sequenceNumbersHandler.mysql.jdbcUrl=jdbc:mysql://mysqlhost:port/dbName
databus.relay.dataSources.sequenceNumbersHandler.mysql.scnTable=databus_scn_store
databus.relay.dataSources.sequenceNumbersHandler.mysql.dbUser=root
databus.relay.dataSources.sequenceNumbersHandler.mysql.dbPassword=password
databus.relay.dataSources.sequenceNumbersHandler.mysql.driverClass=com.mysql.jdbc.Driver
databus.relay.dataSources.sequenceNumbersHandler.mysql.flushItvl=5
databus.relay.dataSources.sequenceNumbersHandler.mysql.upsertSCNQuery=insert into databus_scn_store (max_scn) values (?)
databus.relay.dataSources.sequenceNumbersHandler.mysql.getSCNQuery=select max_scn from databus_scn_store order by updated_at desc limit 1
databus.relay.dataSources.sequenceNumbersHandler.mysql.scnColumnName=max_scn