java 多进程任务调度核心代码

版权声明：本文为博主原创文章，未经博主允许不得转载。 https://blog.csdn.net/qzqanzc/article/details/84859191

本来打算自己写个分布式任务调度框架的，公司要求看XXL-JOB，自己写太费力了。

看了XXL-JOB 的核心代码后觉得，作者的能力远胜于。细节之处处理的尤为巧妙。

分布式调度的本质就是多进程的执行。我把核心的进程控制代码贴出来。

​
 @Override
    public ReturnT<String> execute(String param) throws Exception {
        String command = param;
        int exitValue = -1;

        BufferedReader bufferedReader = null;
        try {
            // command process
            Process process = Runtime.getRuntime().exec(command);
            BufferedInputStream bufferedInputStream = new BufferedInputStream(process.getInputStream());
            bufferedReader = new BufferedReader(new InputStreamReader(bufferedInputStream));

            // command log
            String line;
            while ((line = bufferedReader.readLine()) != null) {
                XxlJobLogger.log(line);
            }

            // command exit
            process.waitFor();
            exitValue = process.exitValue();
        } catch (Exception e) {
            XxlJobLogger.log(e);
        } finally {
            if (bufferedReader != null) {
                bufferedReader.close();
            }
        }

        if (exitValue == 0) {
            return IJobHandler.SUCCESS;
        } else {
            return new ReturnT<String>(IJobHandler.FAIL.getCode(), "command exit value("+exitValue+") is failed");
        }
    }

​