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package handlers
import (
"strings"
"github.com/mimecast/dtail/internal"
"github.com/mimecast/dtail/internal/io/dlog"
"github.com/mimecast/dtail/internal/protocol"
)
// HealthHandler is the handler used on the client side for running mapreduce
// aggregations.
type HealthHandler struct {
baseHandler
}
// NewHealthHandler returns a new health client handler.
func NewHealthHandler(server string) *HealthHandler {
dlog.Client.Debug(server, "Creating new health handler")
return &HealthHandler{
baseHandler: baseHandler{
server: server,
shellStarted: false,
commands: make(chan string),
status: 2, // Assume CRITICAL status by default.
done: internal.NewDone(),
capabilities: make(map[string]struct{}),
capabilitiesCh: make(chan struct{}),
sessionAcks: make(chan SessionAck, 4),
},
}
}
// Read data from the dtail server via Writer interface.
func (h *HealthHandler) Write(p []byte) (n int, err error) {
for _, b := range p {
switch b {
case '\n', protocol.MessageDelimiter:
message := h.baseHandler.receiveBuf.String()
h.handleMessage(message)
h.baseHandler.receiveBuf.Reset()
default:
h.baseHandler.receiveBuf.WriteByte(b)
}
}
return len(p), nil
}
func (h *HealthHandler) handleMessage(message string) {
if len(message) > 0 && message[0] == '.' {
h.baseHandler.handleHiddenMessage(message)
return
}
s := strings.Split(message, protocol.FieldDelimiter)
message = s[len(s)-1]
if message == "OK" {
h.baseHandler.status = 0
}
}
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