com.bytex.snamp.connector.dataStream.NotificationRateAttribute Maven / Gradle / Ivy

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Framework for writing connectors based on message processing

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package com.bytex.snamp.connector.dataStream;

import com.bytex.snamp.connector.attributes.AttributeDescriptor;
import com.bytex.snamp.connector.metrics.RateRecorder;
import com.bytex.snamp.instrumentation.measurements.jmx.MeasurementNotification;
import org.osgi.framework.InvalidSyntaxException;

import javax.management.Notification;
import javax.management.openmbean.CompositeData;
import javax.management.openmbean.CompositeType;

import static com.bytex.snamp.jmx.MetricsConverter.RATE_TYPE;
import static com.bytex.snamp.jmx.MetricsConverter.fromRate;

/**
 * Measures rate of some event.
 */
final class NotificationRateAttribute extends MetricHolderAttribute {
    static final CompositeType TYPE = RATE_TYPE;
    static final String NAME = "notificationRate";
    private static final long serialVersionUID = -5234028741040752357L;

    NotificationRateAttribute(final String name, final AttributeDescriptor descriptor) throws InvalidSyntaxException {
        super(Notification.class, name, TYPE, descriptor, RateRecorder::new);
    }

    @Override
    CompositeData getValue(final RateRecorder metric) {
        return fromRate(metric);
    }

    @Override
    void updateMetric(final RateRecorder metric, final Notification notification) {
        metric.mark();
    }

    @Override
    protected boolean isNotificationEnabled(final Notification notification) {
        if (notification instanceof MeasurementNotification)
            return representsMeasurement((MeasurementNotification) notification);
        else
            return notification.getType().equals(AttributeDescriptor.getName(this));
    }
}