forked from taggledevel2/ratchet
/
mysql_writer.go
73 lines (64 loc) · 2.35 KB
/
mysql_writer.go
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package processors
import (
"database/sql"
"github.com/indosatppi/ratchet/v3/data"
"github.com/indosatppi/ratchet/v3/logger"
"github.com/indosatppi/ratchet/v3/util"
)
// MySQLWriter handles INSERTing data.JSON into a
// specified SQL table. If an error occurs while building
// or executing the INSERT, the error will be sent to the killChan.
//
// Note that the data.JSON must be a valid JSON object or a slice
// of valid objects, where the keys are column names and the
// the values are the SQL values to be inserted into those columns.
//
// For use-cases where a MySQLWriter instance needs to write to
// multiple tables you can pass in SQLWriterData.
type MySQLWriter struct {
writeDB *sql.DB
TableName string
OnDupKeyUpdate bool
OnDupKeyFields []string
ConcurrencyLevel int // See ConcurrentDataProcessor
BatchSize int
}
// NewMySQLWriter returns a new MySQLWriter
func NewMySQLWriter(db *sql.DB, tableName string) *MySQLWriter {
return &MySQLWriter{writeDB: db, TableName: tableName, OnDupKeyUpdate: true}
}
// ProcessData defers to util.MySQLInsertData
func (s *MySQLWriter) ProcessData(d data.JSON, outputChan chan data.JSON, killChan chan error) {
// handle panics a bit more gracefully
defer func() {
if err := recover(); err != nil {
util.KillPipelineIfErr(err.(error), killChan)
}
}()
// First check for SQLWriterData
var wd SQLWriterData
err := data.ParseJSONSilent(d, &wd)
logger.Info("MySQLWriter: Writing data...")
if err == nil && wd.TableName != "" && wd.InsertData != nil {
logger.Debug("MySQLWriter: SQLWriterData scenario")
dd, err := data.NewJSON(wd.InsertData)
util.KillPipelineIfErr(err, killChan)
err = util.MySQLInsertData(s.writeDB, dd, wd.TableName, s.OnDupKeyUpdate, s.OnDupKeyFields, s.BatchSize)
util.KillPipelineIfErr(err, killChan)
} else {
logger.Debug("MySQLWriter: normal data scenario")
err = util.MySQLInsertData(s.writeDB, d, s.TableName, s.OnDupKeyUpdate, s.OnDupKeyFields, s.BatchSize)
util.KillPipelineIfErr(err, killChan)
}
logger.Info("MySQLWriter: Write complete")
}
// Finish - see interface for documentation.
func (s *MySQLWriter) Finish(outputChan chan data.JSON, killChan chan error) {
}
func (s *MySQLWriter) String() string {
return "MySQLWriter"
}
// Concurrency defers to ConcurrentDataProcessor
func (s *MySQLWriter) Concurrency() int {
return s.ConcurrencyLevel
}