cdc

cdc

A Go library to assist in monitoring data changes and syncing data from MySQL/Mongo.

how to use

With Go module support, simply add the following import

import "github.com/Rayson9418/cdc"

demo

check the dir examples for more detail

monitor mongo changed data

    func DemoMonitor() error {
        // Init position store
        if err := cdcredis.InitClient(options.CdcOpt.Redis); err != nil {
            Logger.Fatal("init redis client with opt err", zap.Error(err))
        }
        store := cdcstore.NewStreamRedisStore("mongo:oplog:pos")
    
        // New handler for specific collection
        handler := NewDemoHandler()
    
        // New mongo monitor
        m, err := cdcmongo.NewDefaultMonitor(options.CdcOpt.Mongo)
        if err != nil {
            return err
        }
        // Set position store for monitor
        m.SetStore(store)
        // Add handlers for monitor
        if err = m.AddHandler(handler); err != nil {
            return err
        }
        return m.StartMonitor()
    }

monitor mysql changed data

    func DemoMonitor() error {
        // InitClient position store
        if err := cdcredis.InitClient(options.CdcOpt.Redis); err != nil {
        Logger.Fatal("init redis client with opt err", zap.Error(err))
        }
        store := cdcstore.NewBinlogRedisStore("mysql:binlog:pos")
        
        // New handler for specific collection
        handler := NewDemoHandler()
        
        // New row event monitor
        m, err := cdcmysql.NewRowEventMonitor(options.CdcOpt.Mysql)
        if err != nil {
        return err
        }
        // Set position store for monitor
        m.SetStore(store)
        // Add handlers for monitor
        if err = m.AddHandler(handler); err != nil {
        return err
        }
        return m.StartMonitor()
    }

sync data from mongo/mysql

    // Keep sync always 
    func DemoSyncAlways() error {
        opt := cdcsyncer.NewDefaultOpt()
        opt.StartHour = options.CdcOpt.Syncer.StartHour
        opt.EndHour = options.CdcOpt.Syncer.EndHour
        opt.BatchLimit = options.CdcOpt.Syncer.BatchLimit
        opt.Interval = options.CdcOpt.Syncer.Interval
        
        demo1Syncer := NewDemo1Syncer()
        
        return cdcsyncer.StartSyncer(demo1Syncer)
    }
    
    // Sync once
    func DemoSyncOnce() error {
        opt := cdcsyncer.NewDefaultOpt()
        opt.StartHour = options.CdcOpt.Syncer.StartHour
        opt.EndHour = options.CdcOpt.Syncer.EndHour
        opt.BatchLimit = options.CdcOpt.Syncer.BatchLimit
        opt.Interval = options.CdcOpt.Syncer.Interval
        
        demo1Syncer := NewDemo1Syncer()
        
        return cdcsyncer.SyncOnce(demo1Syncer)
    }

    // Sync on time
    func DemoSyncOnTime() error {
        opt := cdcsyncer.NewDefaultOpt()
        opt.StartHour = options.CdcOpt.Syncer.StartHour
        opt.EndHour = options.CdcOpt.Syncer.EndHour
        opt.BatchLimit = options.CdcOpt.Syncer.BatchLimit
        opt.Interval = options.CdcOpt.Syncer.Interval
        
        demo1Syncer := NewDemo1Syncer()
        
        return cdcsyncer.StartSyncerOnTime(demo1Syncer)
    }

run

If you have Docker and Docker Compose installed, you can run the code using the following steps.

1. Clone this repository to your machine, and switch to the directory examples.

   # clone this repository
   git clone git@github.com:Rayson9418/cdc.git
   
   # switch to the directory
   cd cdc/examples
   

2. Run the script to build the container for compilation, and set up the middleware environment.

   bash build_on_docker.sh -t
   

3. Compile the code and then run it.

   make build && ./examples