java tail文件读取_java实现的文件tail的方法

最近写了的一个项目,开始的目的是同步静态资源的，后来想想可以增加一个远程tail的功能，就是把不同服务器上面的日志文件，通过tail的方式汇总到某一台服务器，这样一些分布式的系统的日志可以被汇总起来查看，方便追踪问题。

具体的代码请移步

http://git.oschina.net/grom/rainy

PS：想要加入该项目开发的同志，请积极联系我。

后期开发计划：

1. Mbean实时监控和属性更改

2. 静态资源启动时同步hash比对同步

I am looking for you!

1.[代码][Java]代码

public void run() {

long filePointer = 0;

if (this.startAtBeginning) {

filePointer = 0;

} else {

filePointer = this.targetFile.length();

}

try {

this.tailing = true;

RandomAccessFile file = new RandomAccessFile(targetFile, "r");

while (this.tailing) {

WatchKey key = watchService.take();

for (WatchEvent> event : key.pollEvents()) {

System.out.println("[Tail monitor ] " + event.context() + " " + event.kind() + " was triggered");

}

long fileLength = this.targetFile.length();

System.out.println("fileLength : " + fileLength);

if (fileLength == 0) {

System.out.println("fileLength : " + fileLength);

Thread.sleep(sampleInterval);

System.out.println("Sleep : " + sampleInterval);

key.reset();

continue;

}

if (fileLength < filePointer && fileLength != 0) {

file = new RandomAccessFile(targetFile, "r");

filePointer = 0;

}

if (fileLength > filePointer) {

file.seek(filePointer);

String line = file.readLine();

while (line != null) {

line = new String(line.getBytes("8859_1"), tailFileCharSet);

this.fireNewLogFileLine(targetFile.getName(), line);

line = file.readLine();

}

filePointer = file.getFilePointer();

}

key.reset();

}

file.close();

} catch (IOException e) {

e.printStackTrace();

} catch (InterruptedException e) {

e.printStackTrace();

}

}