binding/mdsal-binding-dom-adapter/src/main/java/org/opendaylight/mdsal/binding/dom/adapter/osgi/AdaptingComponentTracker.java

   1 /*
   2  * Copyright (c) 2020 PANTHEON.tech, s.r.o. and others.  All rights reserved.
   3  *
   4  * This program and the accompanying materials are made available under the
   5  * terms of the Eclipse Public License v1.0 which accompanies this distribution,
   6  * and is available at http://www.eclipse.org/legal/epl-v10.html
   7  */
   8 package org.opendaylight.mdsal.binding.dom.adapter.osgi;
   9
  10 import static java.util.Objects.requireNonNull;
  11
  12 import java.util.function.Function;
  13 import org.opendaylight.mdsal.binding.api.BindingService;
  14 import org.opendaylight.mdsal.dom.api.DOMService;
  15 import org.osgi.framework.BundleContext;
  16 import org.osgi.framework.ServiceReference;
  17 import org.osgi.service.component.ComponentFactory;
  18 import org.osgi.service.component.ComponentInstance;
  19
  20 final class AdaptingComponentTracker<D extends DOMService, B extends BindingService>
  21         extends AbstractAdaptingTracker<D, B, AdaptingComponentTracker.ComponentHolder<B>> {
  22     static final class ComponentHolder<B extends BindingService> {
  23         final B binding;
  24         ComponentInstance component;
  25
  26         ComponentHolder(final B binding, final ComponentInstance component) {
  27             this.binding = requireNonNull(binding);
  28             this.component = requireNonNull(component);
  29         }
  30     }
  31
  32     private final ComponentFactory componentFactory;
  33
  34     AdaptingComponentTracker(final BundleContext ctx, final Class<D> domClass, final Class<B> bindingClass,
  35             final Function<D, B> bindingFactory, final ComponentFactory componentFactory) {
  36         super(ctx, domClass, bindingClass, bindingFactory);
  37         this.componentFactory = requireNonNull(componentFactory);
  38     }
  39
  40     @Override
  41     ComponentHolder<B> addingService(final ServiceReference<D> reference, final D dom, final B binding) {
  42         return new ComponentHolder<>(binding, componentFactory.newInstance(Dict.fromReference(reference, binding)));
  43     }
  44
  45     @Override
  46     void removedService(final ComponentHolder<B> service) {
  47         service.component.dispose();
  48     }
  49
  50     @Override
  51     void updatedService(final ServiceReference<D> reference, final ComponentHolder<B> service) {
  52         service.component.dispose();
  53         service.component = componentFactory.newInstance(Dict.fromReference(reference, service.binding));
  54     }
  55 }