completed EventLog 的 POJO

Author: waylau

NETTY BY EXAMPLE/EventLog POJOs.md

@@ -0,0 +1,52 @@
+EventLog 的 POJO
+====
+
+在消息应用里面，数据一般以 POJO 形式呈现。这可能保存配置或处理信息除了实际的消息数据。在这个应用程序里，消息的单元是一个“事件”。由于数据来自一个日志文件，我们将称之为 LogEvent。
+
+清单13.1显示了这个简单的POJO的细节。
+
+Listing 13.1 LogEvent message
+
+	public final class LogEvent {
+	    public static final byte SEPARATOR = (byte) ':';
+	
+	    private final InetSocketAddress source;
+	    private final String logfile;
+	    private final String msg;
+	    private final long received;
+	
+	    public LogEvent(String logfile, String msg) { //1
+	        this(null, -1, logfile, msg);
+	    }
+	
+	    public LogEvent(InetSocketAddress source, long received, String logfile, String msg) {  //2
+	        this.source = source;
+	        this.logfile = logfile;
+	        this.msg = msg;
+	        this.received = received;
+	    }
+	
+	    public InetSocketAddress getSource() { //3
+	        return source;
+	    }
+	
+	    public String getLogfile() { //4
+	        return logfile;
+	    }
+	
+	    public String getMsg() {  //5
+	        return msg;
+	    }
+	
+	    public long getReceivedTimestamp() {  //6
+	        return received;
+	    }
+	}
+
+1. 构造器用于出站消息
+2. 构造器用于入站消息
+3. 返回发送 LogEvent 的 InetSocketAddress 的资源
+4. 返回用于发送 LogEvent 的日志文件的名称
+5. 返回消息的内容
+6. 返回 LogEvent 接收到的时间
+

SUMMARY.md

@@ -85,6 +85,7 @@ This is the summary of my book.
 		* [UDP 基础](NETTY BY EXAMPLE/UDP Basics.md)
 		* [UDP 广播](NETTY BY EXAMPLE/UDP Broadcast.md)
 		* [UDP 示例](NETTY BY EXAMPLE/The UDP Sample Application.md)
+		* [EventLog 的 POJO](NETTY BY EXAMPLE/EventLog POJOs.md）
 * 高级主题
 	* [实现自定义编解码器](ADVANCED TOPICS/Implement a custom codec.md)
 	* [EventLoop 和线程模型](ADVANCED TOPICS/EventLoop and thread model.md)