netty堆外内存的监控

最新推荐文章于 2025-09-28 09:59:40 发布

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import io.netty.util.internal.PlatformDependent;
import org.springframework.stereotype.Component;
import org.springframework.util.ReflectionUtils;

import javax.annotation.PostConstruct;
import java.lang.reflect.Field;
import java.util.concurrent.Executors;
import java.util.concurrent.ScheduledExecutorService;
import java.util.concurrent.TimeUnit;
import java.util.concurrent.atomic.AtomicLong;

@Component
public class Metrics {
    @PostConstruct
    public void init () {

        ScheduledExecutorService scheduledExecutorService = Executors.newSingleThreadScheduledExecutor();
        scheduledExecutorService.scheduleAtFixedRate(() -> directMemReporter(), 1, 1, TimeUnit.SECONDS);

    }

    public void directMemReporter() {
        Field field = ReflectionUtils.findField(PlatformDependent.class, "DIRECT_MEMORY_COUNTER");
        field.setAccessible(true);
        try {
            AtomicLong directMem = (AtomicLong) field.get(PlatformDependent.class);

            System.err.println(directMem.get());
        } catch (IllegalAccessException e) {}
    }
}