Update layouts.js

lib/layouts.js

@@ -120,6 +120,7 @@ function messagePassThroughLayout (loggingEvent) {
  *  - %r time in toLocaleTimeString format
  *  - %p log level
  *  - %c log category
+ *  - %h hostname
  *  - %m log data
  *  - %d date in various formats
  *  - %% %
@@ -143,7 +144,7 @@ function messagePassThroughLayout (loggingEvent) {
  */
 function patternLayout (pattern, tokens) {
   var TTCC_CONVERSION_PATTERN  = "%r %p %c - %m%n";
-  var regex = /%(-?[0-9]+)?(\.?[0-9]+)?([\[\]cdmnprx%])(\{([^\}]+)\})?|([^%]+)/;
+  var regex = /%(-?[0-9]+)?(\.?[0-9]+)?([\[\]cdhmnprx%])(\{([^\}]+)\})?|([^%]+)/;
   
   pattern = pattern || TTCC_CONVERSION_PATTERN;
 
@@ -166,8 +167,6 @@ function patternLayout (pattern, tokens) {
       // Pick up special cases
       if (format == "ISO8601") {
         format = dateFormat.ISO8601_FORMAT;
-      } else if (format == "ISO8601_WITH_TZ_OFFSET") {
-        format = dateFormat.ISO8601_WITH_TZ_OFFSET_FORMAT;
       } else if (format == "ABSOLUTE") {
         format = dateFormat.ABSOLUTETIME_FORMAT;
       } else if (format == "DATE") {
@@ -177,6 +176,10 @@ function patternLayout (pattern, tokens) {
     // Format the date
     return dateFormat.asString(format, loggingEvent.startTime);
   }
+  
+  function hostname() {
+    return os.hostname().toString();
+  }
 
   function formatMessage(loggingEvent) {
     return formatLogData(loggingEvent.data);
@@ -220,6 +223,7 @@ function patternLayout (pattern, tokens) {
   var replacers = {
     'c': categoryName,
     'd': formatAsDate,
+    'h': hostname,
     'm': formatMessage,
     'n': endOfLine,
     'p': logLevel,