Merge branch 'master' into util.format

README.md

@@ -21,10 +21,10 @@ NOTE: from log4js 0.5 onwards you'll need to explicitly enable replacement of no
 
 ```javascript
 {
-    appenders: [
-        { type: "console" }
-    ],
-    replaceConsole: true
+  appenders: [
+    { type: "console" }
+  ],
+  replaceConsole: true
 }
 ```
 
@@ -42,9 +42,9 @@ var logger = log4js.getLogger();
 logger.debug("Some debug messages");
 ```
 By default, log4js outputs to stdout with the coloured layout (thanks to [masylum](http://github.com/masylum)), so for the above you would see:
-
-    [2010-01-17 11:43:37.987] [DEBUG] [default] - Some debug messages
-
+```bash
+[2010-01-17 11:43:37.987] [DEBUG] [default] - Some debug messages
+```
 See example.js for a full example, but here's a snippet (also in fromreadme.js):
 ```javascript
 var log4js = require('log4js'); 
@@ -53,7 +53,7 @@ var log4js = require('log4js');
 log4js.loadAppender('file');
 //log4js.addAppender(log4js.appenders.console());
 log4js.addAppender(log4js.appenders.file('logs/cheese.log'), 'cheese');
-```javascript
+
 var logger = log4js.getLogger('cheese');
 logger.setLevel('ERROR');
 
@@ -65,18 +65,18 @@ logger.error('Cheese is too ripe!');
 logger.fatal('Cheese was breeding ground for listeria.');
 ```
 Output:
-
-    [2010-01-17 11:43:37.987] [ERROR] cheese - Cheese is too ripe!
-    [2010-01-17 11:43:37.990] [FATAL] cheese - Cheese was breeding ground for listeria.
-    
+```bash
+[2010-01-17 11:43:37.987] [ERROR] cheese - Cheese is too ripe!
+[2010-01-17 11:43:37.990] [FATAL] cheese - Cheese was breeding ground for listeria.
+```    
 The first 5 lines of the code above could also be written as:
 ```javascript
 var log4js = require('log4js');
 log4js.configure({
-        appenders: [
-                { type: 'console' },
-                { type: 'file', filename: 'logs/cheese.log', category: 'cheese' }
-        ]
+  appenders: [
+    { type: 'console' },
+    { type: 'file', filename: 'logs/cheese.log', category: 'cheese' }
+  ]
 });
 ```
 
@@ -106,28 +106,28 @@ For FileAppender you can also pass the path to the log directory as an option wh
 log4js.configure('my_log4js_configuration.json', { cwd: '/absolute/path/to/log/dir' });
 ```
 If you have already defined an absolute path for one of the FileAppenders in the configuration file, you could add a "absolute": true to the particular FileAppender to override the cwd option passed. Here is an example configuration file:
-
-    #### my_log4js_configuration.json ####
+```json
+#### my_log4js_configuration.json ####
+{
+  "appenders": [
     {
-      "appenders": [
-        {
-          "type": "file",
-          "filename": "relative/path/to/log_file.log",
-          "maxLogSize": 20480,
-          "backups": 3,
-          "category": "relative-logger"
-        },
-        {
-          "type": "file",
-          "absolute": true,
-          "filename": "/absolute/path/to/log_file.log",
-          "maxLogSize": 20480,
-          "backups": 10,
-          "category": "absolute-logger"          
-        }
-      ]
+      "type": "file",
+      "filename": "relative/path/to/log_file.log",
+      "maxLogSize": 20480,
+      "backups": 3,
+      "category": "relative-logger"
+    },
+    {
+      "type": "file",
+      "absolute": true,
+      "filename": "/absolute/path/to/log_file.log",
+      "maxLogSize": 20480,
+      "backups": 10,
+      "category": "absolute-logger"          
     }
-    
+  ]
+}
+```    
 Documentation for most of the core appenders can be found on the [wiki](log4js-node/wiki/Appenders), otherwise take a look at the tests and the examples.
 
 ## Documentation

examples/patternLayout-tokens.js

@@ -0,0 +1,21 @@
+var log4js = require('./lib/log4js');
+
+var config = {
+    "appenders": [
+      {
+        "type": "console",
+        "layout": {
+          "type": "pattern",
+          "pattern": "%[%r (%x{pid}) %p %c -%] %m%n",
+          "tokens": {
+            "pid" : function() { return process.pid; }
+          }
+        }
+      }
+    ]
+  };
+
+log4js.configure(config, {});
+
+var logger = log4js.getLogger("app");
+logger.info("Test log message");

lib/appenders/multiprocess.js

@@ -115,11 +115,11 @@ function createAppender(config) {
     }
 }
 
-function configure(config) {
+function configure(config, options) {
     var actualAppender;
     if (config.appender && config.mode === 'master') {
         log4js.loadAppender(config.appender.type);
-        actualAppender = log4js.appenderMakers[config.appender.type](config.appender);
+        actualAppender = log4js.appenderMakers[config.appender.type](config.appender, options);
         config.actualAppender = actualAppender;
     }
     return createAppender(config);

lib/layouts.js

@@ -10,8 +10,9 @@ var dateFormat = require('./date_format')
     , "coloured": function() { return colouredLayout; }
     , "pattern": function (config) {
 	  var pattern = config.pattern || undefined;
-	  return patternLayout(pattern);
-      }
+	  var tokens = config.tokens || undefined;
+	  return patternLayout(pattern, tokens);
+	}
   }
   , colours = {
       ALL: "grey"
@@ -121,13 +122,26 @@ function messagePassThroughLayout (loggingEvent) {
  *  - %d date in various formats
  *  - %% %
  *  - %n newline
+ *  - %x{<tokenname>} add dynamic tokens to your log. Tokens are specified in the tokens parameter
  * You can use %[ and %] to define a colored block.
- * Takes a pattern string and returns a layout function.
+ *
+ * Tokens are specified as simple key:value objects. 
+ * The key represents the token name whereas the value can be a string or function
+ * which is called to extract the value to put in the log message. If token is not
+ * found, it doesn't replace the field.
+ *
+ * A sample token would be: { "pid" : function() { return process.pid; } }
+ *
+ * Takes a pattern string, array of tokens and returns a layout function.
+ * @param {String} Log format pattern String
+ * @param {object} map object of different tokens
+ * @return {Function}
  * @author Stephan Strittmatter
+ * @author Jan Schmidle
  */
-function patternLayout (pattern) {
+function patternLayout (pattern, tokens) {
     var TTCC_CONVERSION_PATTERN  = "%r %p %c - %m%n";
-    var regex = /%(-?[0-9]+)?(\.?[0-9]+)?([\[\]cdmnpr%])(\{([^\}]+)\})?|([^%]+)/;
+    var regex = /%(-?[0-9]+)?(\.?[0-9]+)?([\[\]cdmnprx%])(\{([^\}]+)\})?|([^%]+)/;
 
     pattern = pattern || TTCC_CONVERSION_PATTERN;
 
@@ -203,6 +217,17 @@ function patternLayout (pattern) {
 		case "%":
 		    replacement = "%";
 		    break;
+		case "x":
+			if(typeof(tokens[specifier]) !== 'undefined') {
+				if(typeof(tokens[specifier]) === 'function') {
+					replacement = tokens[specifier]();
+				} else {
+					replacement = tokens[specifier];
+				}
+			} else {
+				replacement = matchedString;
+			}
+			break;
 		default:
 		    replacement = matchedString;
 		    break;

lib/streams/BufferedWriteStream.js

@@ -1,4 +1,5 @@
 var events = require('events'),
+    Dequeue = require('dequeue'),
     util = require('util');
 
 module.exports = BufferedWriteStream;
@@ -6,7 +7,7 @@ module.exports = BufferedWriteStream;
 function BufferedWriteStream(stream) {
     var that = this;
     this.stream = stream;
-    this.buffer = [];
+    this.buffer = new Dequeue();
     this.canWrite = false;
     this.bytes = 0;
 

package.json

@@ -1,6 +1,6 @@
 {
    "name": "log4js",
-   "version": "0.5.6",
+   "version": "0.5.7",
    "description": "Port of Log4js to work with node.",
    "keywords": [
        "logging",
@@ -26,7 +26,8 @@
        "lib": "lib"
    },
    "dependencies": {
-       "async": "0.1.15"
+       "async": "0.1.15",
+       "dequeue": "1.0.3"
    },
    "devDependencies": {
        "vows": "0.6.2",

test/layouts-test.js

@@ -4,9 +4,10 @@ assert = require('assert');
 //used for patternLayout tests.
 function test(args, pattern, value) {
     var layout = args[0]
-    , event = args[1];
+    , event = args[1]
+    , tokens = args[2];
 
-    assert.equal(layout(pattern)(event), value);
+    assert.equal(layout(pattern, tokens)(event), value);
 }
 
 vows.describe('log4js layouts').addBatch({
@@ -174,8 +175,12 @@ vows.describe('log4js layouts').addBatch({
                 level: {
                     toString: function() { return "DEBUG"; }
                 }
-            }, layout = require('../lib/layouts').patternLayout;
-            return [layout, event];
+            }, layout = require('../lib/layouts').patternLayout
+            , tokens = {
+                testString: 'testStringToken',
+                testFunction: function() { return 'testFunctionToken'; }
+            };
+            return [layout, event, tokens];
         },
 
         'should default to "time logLevel loggerName - message"': function(args) {
@@ -245,6 +250,18 @@ vows.describe('log4js layouts').addBatch({
         },
         '%[%r%] should output colored time': function(args) {
             test(args, '%[%r%]', '\033[36m14:18:30\033[39m');
-        }
+        },
+        '%x{testString} should output the string stored in tokens': function(args) {
+            test(args, '%x{testString}', 'testStringToken');
+        },
+        '%x{testFunction} should output the result of the function stored in tokens': function(args) {
+            test(args, '%x{testFunction}', 'testFunctionToken');
+        },
+        '%x{doesNotExist} should output the string stored in tokens': function(args) {
+            test(args, '%x{doesNotExist}', '%x{doesNotExist}');
+        },
+        '%x should output the string stored in tokens': function(args) {
+            test(args, '%x', '%x');
+        },
     }
 }).export(module);