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package clients
import (
"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"
)
// TailClient is used for tailing remote log files (opening, seeking to the end and returning only new incoming lines).
type TailClient struct {
baseClient
}
// NewTailClient returns a new TailClient.
func NewTailClient(args config.Args) (*TailClient, error) {
args.Mode = omode.TailClient
c := TailClient{
baseClient: baseClient{
Args: args,
throttleCh: make(chan struct{}, args.ConnectionsPerCPU*runtime.NumCPU()),
retry: true,
runtime: newClientRuntimeBoundary(config.CurrentRuntime()),
},
}
c.init()
c.makeConnections(c)
return &c, nil
}
func (c TailClient) makeHandler(server string) handlers.Handler {
return handlers.NewClientHandler(server)
}
func (c TailClient) makeSessionSpec() (SessionSpec, error) {
return NewSessionSpec(c.Args), nil
}
func (c TailClient) makeCommands() (commands []string) {
sessionSpec, err := c.makeSessionSpec()
if err != nil {
dlog.Client.FatalPanic("unable to build tail session spec", err)
}
commands, err = sessionSpec.Commands()
if err != nil {
dlog.Client.FatalPanic("unable to build tail commands from session spec", err)
}
return commands
}
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