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package handlers
import (
"context"
"strings"
"github.com/mimecast/dtail/internal/io/dlog"
"github.com/mimecast/dtail/internal/mapr/server"
)
// Map command implements the mapreduce command server side.
type mapCommand struct {
aggregate *server.Aggregate
server *ServerHandler
}
// newMapCommand returns a new server side mapreduce command.
//
// The Aggregate is the one and only aggregate path for BOTH server mode and
// serverless: an Aggregate is always built, and the read commands feed it
// directly via AggregateProcessor (no aggregate line-channel). The former
// regular server.Aggregate has been deleted (task hv0), so there is no
// fallback branch.
func newMapCommand(serverHandler *ServerHandler, argc int,
args []string) (mapCommand, *server.Aggregate, error) {
m := mapCommand{server: serverHandler}
queryStr := strings.Join(args[1:], " ")
defaultLogFormat := ""
if serverHandler.serverCfg != nil {
defaultLogFormat = serverHandler.serverCfg.MapreduceLogFormat
}
dlog.Server.Info("Creating turbo aggregate for MapReduce", "query", queryStr)
aggregate, err := server.NewAggregate(queryStr, defaultLogFormat)
if err != nil {
return m, nil, err
}
m.aggregate = aggregate
return m, aggregate, nil
}
func (m *mapCommand) Start(ctx context.Context, aggregatedMessages chan<- string) {
m.aggregate.Start(ctx, aggregatedMessages)
}
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