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package clients
import (
"errors"
"runtime"
"github.com/mimecast/dtail/internal/clients/handlers"
"github.com/mimecast/dtail/internal/config"
"github.com/mimecast/dtail/internal/io/dlog"
"github.com/mimecast/dtail/internal/omode"
)
// GrepClient searches a remote file for all lines matching a regular
// expression. Only the matching lines are displayed.
type GrepClient struct {
baseClient
}
// NewGrepClient creates a new grep client.
func NewGrepClient(args config.Args) (*GrepClient, error) {
if args.RegexStr == "" {
return nil, errors.New("No regex specified, use '-regex' flag")
}
args.Mode = omode.GrepClient
c := GrepClient{
baseClient: baseClient{
Args: args,
throttleCh: make(chan struct{}, args.ConnectionsPerCPU*runtime.NumCPU()),
retry: false,
runtime: newClientRuntimeBoundary(config.CurrentRuntime()),
},
}
c.init()
c.makeConnections(c)
return &c, nil
}
func (c GrepClient) makeHandler(server string) handlers.Handler {
return handlers.NewClientHandler(server)
}
func (c GrepClient) makeSessionSpec() (SessionSpec, error) {
return NewSessionSpec(c.Args), nil
}
func (c GrepClient) makeCommands() (commands []string) {
sessionSpec, err := c.makeSessionSpec()
if err != nil {
dlog.Client.FatalPanic("unable to build grep session spec", err)
}
commands, err = sessionSpec.Commands()
if err != nil {
dlog.Client.FatalPanic("unable to build grep commands from session spec", err)
}
return commands
}
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