fix terminate after log flush

lib/index.js

@@ -6,7 +6,7 @@ var common = require('winston/lib/winston/common')
 var _dirname = require('path').dirname
 var LogseneJS = require('logsene-js')
 var flat = require('flat')
-
+var exitCode = 0
 var Logsene = function (options) {
   Transport.call(this, options)
   options = options || {}
@@ -49,13 +49,23 @@ var Logsene = function (options) {
     self.emit('flush', data)
   })
   var logseneExitHandler = function (code) {
-    this.logger.once('log', function () {
-      process.exit(code)
-    })
-    this.logger.once('error', function () {
-      process.exit(code)
-    })
-    this.logger.send()
+    // console.log('exit in winston')
+    if (this.logger.logCount == 0) {
+      setTimeout(process.exit, 200)
+    } else {
+      this.logger.once('log', function (data) {
+        // console.log('winston-logssene, flush on exit: ' + data.count)
+        setTimeout(process.exit, 200)
+      })
+      this.logger.once('error', function () {
+        setTimeout(process.exit, 200)
+      })
+      this.logger.send()
+      // when no error or successful "log" event was received, 
+      // the process should terminate.
+      // upstart waits max 10 seconds before kill -9
+      setTimeout(process.exit, 9000)
+    }
   }.bind(this)
   if (options.flushOnExit) {
     process.once('SIGTERM', logseneExitHandler)