dubbo source code reading notes

class MonitorListener implements Runnable {

    private String key;

    public MonitorListener(String key) {
        this.key = key;
    }

    @Override
    public void run() {
        try {
            CompletableFuture<Monitor> completableFuture = AbstractMonitorFactory.FUTURES.get(key);
            AbstractMonitorFactory.MONITORS.put(key, completableFuture.get());
            AbstractMonitorFactory.FUTURES.remove(key);
        } catch (InterruptedException e) {
            logger.warn("Thread was interrupted unexpectedly, monitor will never be got.");
            AbstractMonitorFactory.FUTURES.remove(key);
        } catch (ExecutionException e) {
            logger.warn("Create monitor failed, monitor data will not be collected until you fix this problem. ", e);
        }
    }
}