/*
 * Copyright (c) 2018, WSO2 Inc. (http://www.wso2.org) All Rights Reserved.
 *
 * WSO2 Inc. licenses this file to you under the Apache License,
 * Version 2.0 (the "License"); you may not use this file except
 * in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing,
 * software distributed under the License is distributed on an
 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
 * KIND, either express or implied. See the License for the
 * specific language governing permissions and limitations
 * under the License.
 */
package org.wso2.carbon.sp.distributed.resource.core.internal;

import org.osgi.framework.BundleContext;
import org.osgi.service.component.annotations.Activate;
import org.osgi.service.component.annotations.Component;
import org.osgi.service.component.annotations.Deactivate;
import org.osgi.service.component.annotations.Reference;
import org.osgi.service.component.annotations.ReferenceCardinality;
import org.osgi.service.component.annotations.ReferencePolicy;
import org.wso2.carbon.stream.processor.statistics.internal.OperatingSystemMetricSet;

/**
 * This is OSGi-components to register OperatingSystemMetricSet class.
 */
@Component(
        name = "OSMetricsServiceComponent",
        immediate = true
)
public class OSMetricsServiceComponent {
    @Activate
    protected void activate(BundleContext bundleContext) {
    }

    @Deactivate
    protected void deactivate(BundleContext bundleContext) {
    }

    @Reference(
            name = "org.wso2.carbon.stream.processor.statistics.internal.OperatingSystemMetricSet",
            service = OperatingSystemMetricSet.class,
            cardinality = ReferenceCardinality.MANDATORY,
            policy = ReferencePolicy.DYNAMIC,
            unbind = "unregisterOperatingSystemMetricSet"
    )
    protected void registerOperatingSystemMetricSet(OperatingSystemMetricSet operatingSystemMetricSet) {
        ServiceDataHolder.setOperatingSystemMetricSet(operatingSystemMetricSet);
    }

    protected void unregisterOperatingSystemMetricSet(OperatingSystemMetricSet operatingSystemMetricSet) {
        ServiceDataHolder.setOperatingSystemMetricSet(null);
    }
}


