tools/package/archetypes/bundle/src/main/resources/archetype-resources/src/main/java/AppComponent.java

#set( $symbol_pound = '#' )
#set( $symbol_dollar = '$' )
#set( $symbol_escape = '\' )
/*
 * Copyright ${year}-present Open Networking Foundation
 *
 * 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 ${package};

import org.onosproject.cfg.ComponentConfigService;
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.Modified;
import org.osgi.service.component.annotations.Reference;
import org.osgi.service.component.annotations.ReferenceCardinality;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import java.util.Dictionary;
import java.util.Properties;

import static org.onlab.util.Tools.get;

/**
 * Skeletal ONOS application component.
 */
@Component(immediate = true,
           service = {SomeInterface.class},
           property = {
               "someProperty=Some Default String Value",
           })
public class AppComponent implements SomeInterface {

    private final Logger log = LoggerFactory.getLogger(getClass());

    /** Some configurable property. */
    private String someProperty;

    @Reference(cardinality = ReferenceCardinality.MANDATORY)
    protected ComponentConfigService cfgService;

    @Activate
    protected void activate() {
        cfgService.registerProperties(getClass());
        log.info("Started");
    }

    @Deactivate
    protected void deactivate() {
        cfgService.unregisterProperties(getClass(), false);
        log.info("Stopped");
    }

    @Modified
    public void modified(ComponentContext context) {
        Dictionary<?, ?> properties = context != null ? context.getProperties() : new Properties();
        if (context != null) {
            someProperty = get(properties, "someProperty");
        }
        log.info("Reconfigured");
    }

    @Override
    public void someMethod() {
        log.info("Invoked");
    }

}