fish.payara.microprofile.metrics.jmx.MBeanCounterImpl Maven / Gradle / Ivy

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package fish.payara.microprofile.metrics.jmx;

import org.eclipse.microprofile.metrics.Counter;

/**
 * Implementation of a counter based off an MBean.
 * As this is just a proxy for the MBean calling the
 * {@link #inc() } method will throw an {@link UnsupportedOperationException}.
 * Just use the {@link #getCount()} method to get the value of the MBean backing this.
 */
public class MBeanCounterImpl implements Counter {

    private final MBeanExpression mBean;

    public MBeanCounterImpl(MBeanExpression mBean) {
        this.mBean = mBean;
    }

    /**
     * Throws {@link UnsupportedOperationException} - this is all dealt with
     * by the backing MBean
     */
    @Override
    public void inc() {
        throw new UnsupportedOperationException("Not supported - use getCount() to get value from MBean directly.");
    }

    /**
     * Throws {@link UnsupportedOperationException} - this is all dealt with
     * by the backing MBean
     */
    @Override
    public void inc(long n) {
        throw new UnsupportedOperationException("Not supported - use getCount() to get value from MBean directly.");
    }

    @Override
    public long getCount() {
        return (mBean.getNumberValue()).longValue();
    }
    
}