package com.ankurm.startup;

import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.boot.context.metrics.buffering.BufferingApplicationStartup;
import org.springframework.core.metrics.jfr.FlightRecorderApplicationStartup;

@SpringBootApplication
public class StartupDiagnosisApplication {

    public static void main(String[] args) {
        SpringApplication app = new SpringApplication(StartupDiagnosisApplication.class);
        String mode = System.getProperty("startup.tracking", "buffering");
        // The capacity is the number of *steps*, not beans, and there is no way to change it
        // after construction. See docs/07-failure-modes.md for what a too-small buffer does.
        int capacity = Integer.getInteger("startup.buffer", 16384);
        switch (mode) {
            case "buffering" -> app.setApplicationStartup(new BufferingApplicationStartup(capacity));
            case "jfr" -> app.setApplicationStartup(new FlightRecorderApplicationStartup());
            default -> { }
        }
        app.run(args);
    }
}