# ThrottleServiceComponent.java

    /*
    * Copyright 2005,2006 WSO2, Inc. http://wso2.com
    *
    * Licensed 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.apache.synapse.commons.throttle.core.internal;

    import org.apache.commons.logging.Log;
    import org.apache.commons.logging.LogFactory;
    import org.apache.synapse.commons.throttle.core.DistributedCounterManager;
    import org.apache.synapse.commons.throttle.core.ThrottleUtil;
    import org.osgi.service.component.ComponentContext;
    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;

    @Component(
    		name = "throttle.core.services",
    		immediate = true
    )
    public class ThrottleServiceComponent {

    	private static final Log log  = LogFactory.getLog(ThrottleServiceComponent.class.getName());

    	@Activate
    	protected void activate(ComponentContext context) {
    		log.debug("Activating throttle core service component");
    		if (ThrottleServiceDataHolder.getInstance().getThrottleProperties() == null){
    			ThrottleServiceDataHolder.getInstance().setThrottleProperties(
    					ThrottleUtil.loadThrottlePropertiesFromConfigurations());
    		}
    	}

    	@Deactivate
    	protected void deactivate(ComponentContext ctx) {
    		log.debug("Deactivating throttle core service component");
    	}

    	/**
    	 * Access Distributed Counter Instance, which is exposed as an OSGI service.
    	 * @param distributedCounterManager
    	 */
    	@Reference(
    			name = "distributedCounterManager.instance.service",
    			service = DistributedCounterManager.class,
    			cardinality = ReferenceCardinality.MULTIPLE,
    			policy = ReferencePolicy.DYNAMIC,
    			unbind = "removeDistributedCounterManagerInstance"
    	)
    	protected void addDistributedCounterManagerInstance(DistributedCounterManager distributedCounterManager) {
    		ThrottleServiceDataHolder.getInstance().addDistributedCounterManager(distributedCounterManager);
    	}

    	protected void removeDistributedCounterManagerInstance(DistributedCounterManager distributedCounterManager) {
    		ThrottleServiceDataHolder.getInstance().removeDistributedCounterManager(distributedCounterManager);
    	}
    }