jnotify 监听文件读写

linux环境下需要监听文件事件，jnotify给出java版的解决方案，引用inotify机制。 

应对不同事件我们只需要在对应平台下添加对应事件监听即可。 


此为监听文件创建、改变、删除、读、写等操作 

public void fileRenamed(int wd, String rootPath, String oldName, String newName) {
    System.out.println("[" + dfFilesNotify.format(new Date()) + "]");
    System.out.println("watch-notify renamed " + rootPath + " : " + oldName + " ---> " + newName);
    if ((rootPath == null) || (newName == null) || newName.endsWith("swp") || newName.endsWith("swx")
            || newName.endsWith("~") || newName.endsWith("swpx")) {
        return;
    }
    try {
        notifyKafka(rootPath, newName, "FILE_RENAMED");
    } catch (Exception e) {
        System.out.println("call FileParseService failed, " + e);
    }
}

public void fileModified(int wd, String rootPath, String name) {
    System.out.println("[" + dfFilesNotify.format(new Date()) + "]");
    System.out.println("watch-notify modified " + rootPath + " : " + name);
    try {
        notifyKafka(rootPath, name, "FILE_NOWRITTEN_CLOSED");
    } catch (Exception e) {
        // TODO Auto-generated catch block
        e.printStackTrace();
    }
}

public void fileDeleted(int wd, String rootPath, String name) {
    System.out.println("[" + dfFilesNotify.format(new Date()) + "]");
    System.out.println("watch-notify deleted " + rootPath + " : " + name);
}

public void fileCreated(int wd, String rootPath, String name) {
    System.out.println("[" + dfFilesNotify.format(new Date()) + "]");
    System.out.println("watch-notify created " + rootPath + " : " + name);
}

public void fileWrittenClosed(int watchId, String root, String name) {
    System.out.println("[" + dfFilesNotify.format(new Date()) + "]");
    System.out.println("watch-notify-written watchId: " + watchId + "");
    System.out.println("watch-notify-written root: " + root + "");
    System.out.println("watch-notify-written name: " + name + "");

    if ((root == null) || (name == null) || name.endsWith("swp") || name.endsWith("swx") || name.endsWith("~")
            || name.endsWith("swpx")) {
        return;
    }

    try {
        notifyKafka(root, name, "FILE_WRITTEN_CLOSED");
    } catch (Exception e) {
        System.out.println("call FileParseService failed, " + e);
    }
}

public void fileNowrittenClosed(int watchId, String root, String name) {
    File file = new File(root + "/" + name);
    if (file.isDirectory()) {
        return;
    }
    System.out.println("[" + dfFilesNotify.format(new Date()) + "]");
    System.out.println("watch-notify-nowritten watchId: " + watchId + "");
    System.out.println("watch-notify-nowritten root: " + root + "");
    System.out.println("watch-notify-nowritten name: " + name + "");

    if ((root == null) || (name == null) || name.endsWith("swp") || name.endsWith("swx") || name.endsWith("~")
            || name.endsWith("swpx")) {
        return;
    }

    try {
        notifyKafka(root, name, "FILE_NOWRITTEN_CLOSED");
    } catch (Exception e) {
        System.out.println("call FileParseService failed, " + e);
    }
}

private void notifyKafka(String directory, String fileName, String event) throws Exception {
    String propurl = notifyListenersMap.get(directory).get(event) + "";
    File file = new File(propurl);
    if (!file.exists()) {
        return;
    }
    Map<String, String> map = new HashMap<String, String>();
    map.put("fileTime", dfFilesNotify.format(new Date()));
    map.put("fileName", directory + "/" + fileName);
    map.put("fileEvent", event);
    map.put("sftpHostIp", InetAddress.getLocalHost().getHostAddress());
    map.put("sftpHostName", InetAddress.getLocalHost().getHostName());
    ObjectMapper mapper = new ObjectMapper();
    String message = mapper.writeValueAsString(map);

    JDtechProducer producer = JDtechProducer.getInstance(propurl);
    producer.send(1 + "", message);
    System.out.println("watch-notify kafka send : \n" + message + "\n");
    // producer.close();
}

同时对应适配器中也需要加上相应的事件 

int linuxMask = 0;
if ((mask & JNotify.FILE_CREATED) != 0) {
    linuxMask |= JNotify_linux.IN_CREATE;
}
if ((mask & JNotify.FILE_DELETED) != 0) {
    linuxMask |= JNotify_linux.IN_DELETE;
    linuxMask |= JNotify_linux.IN_DELETE_SELF;
}
if ((mask & JNotify.FILE_MODIFIED) != 0) {
    linuxMask |= JNotify_linux.IN_ATTRIB;
    linuxMask |= JNotify_linux.IN_MODIFY;
}
if ((mask & JNotify.FILE_RENAMED) != 0) {
    linuxMask |= JNotify_linux.IN_MOVED_FROM;
    linuxMask |= JNotify_linux.IN_MOVED_TO;
}
if ((mask & JNotify.FILE_WRITTEN_CLOSED) != 0) {
    linuxMask |= JNotify_linux.IN_CLOSE_WRITE;
}
if ((mask & JNotify.FILE_NOWRITTEN_CLOSED) != 0) {
    linuxMask |= JNotify_linux.IN_CLOSE_NOWRITE;
}

PS:此处改进是否可以将操作的事件发起方记录下来？此为下一步的优化点。