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/*
 * Copyright (c) 2017 Red Hat, Inc. and others. All rights reserved.
 *
 * This program and the accompanying materials are made available under the
 * terms of the Eclipse Public License v1.0 which accompanies this distribution,
 * and is available at http://www.eclipse.org/legal/epl-v10.html
 */
package org.opendaylight.serviceutils.metrics.sample;

import javax.inject.Inject;
import javax.inject.Singleton;
import org.opendaylight.serviceutils.metrics.Labeled;
import org.opendaylight.serviceutils.metrics.Meter;
import org.opendaylight.serviceutils.metrics.MetricDescriptor;
import org.opendaylight.serviceutils.metrics.MetricProvider;
import org.osgi.service.component.annotations.Activate;
import org.osgi.service.component.annotations.Component;
import org.osgi.service.component.annotations.Reference;

/**
 * Example illustrating advanced type safe usage of metrics API.
 *
 * @author Michael Vorburger.ch, based on an idea by Stephen Kitt
 */
@Singleton
@Component(service = { })
public final class MetricsAdvancedExample {

    public static class MacLabeledMeter {
        private final Labeled labeledMeter;

        public MacLabeledMeter(Labeled labeledMeter) {
            this.labeledMeter = labeledMeter;
        }

        public Meter mac(String mac) {
            return labeledMeter.label(mac);
        }
    }

    public static class PortLabeledMeter {
        private final Labeled> labeledLabeledMeter;

        public PortLabeledMeter(Labeled> labeledLabeledMeter) {
            this.labeledLabeledMeter = labeledLabeledMeter;
        }

        public MacLabeledMeter port(int port) {
            return new MacLabeledMeter(labeledLabeledMeter.label(Integer.toString(port)));
        }
    }

    private final PortLabeledMeter meter;

    @Inject
    @Activate
    public MetricsAdvancedExample(@Reference MetricProvider metricProvider) {
        meter = new PortLabeledMeter(metricProvider.newMeter(MetricDescriptor.builder().anchor(this)
                .project("infrautils").module("metrics").id("example_meter").build(),
                "port", "mac"));
    }

    public void run() {
        meter.port(456).mac("1A:0B:F2:25:1C:68").mark();
    }
}