java - Singleton service solves multi-process writing files

Question

Now we need a multi-process file writing program

If you write directly, you need to ensure that the process locks the file handle

Now I want to register a singleton writing service through spring

When multiple programs write files, they request the spring interface to write files

Is this solution feasible?

Or use a singleton RPC service?

A single instance can ensure that it is an instance when writing a file, avoiding multi-thread and multi-process synchronization problems!

Answer 1

我认为这样还是不行的，本质上Spring只是帮你管理实例，线程安全的问题还是要自己解决

再者，你说的是多进程写文件，通过rpc也仅仅是多线程方式吧？

其实本质就是想实现一个线程安全的文件写接口，单例是OK的，自己的实例当作锁就行了

Answer 2

=_=! 一个多进程的程序？

Answer 3

用zookeeper，zookepper一个特点是写同一个znode只能有一个客户端(进程)写入成功，就用这个客户端写文件，或者利用数据库写入同一个主键只有一个可以插入成功的特点