binding/mdsal-binding-runtime-osgi/src/main/java/org/opendaylight/mdsal/binding/runtime/osgi/impl/GlobalBindingRuntimeContext.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.runtime.osgi.impl;
   9
  10 import static com.google.common.base.Verify.verifyNotNull;
  11
  12 import com.google.common.primitives.UnsignedLong;
  13 import org.opendaylight.mdsal.binding.runtime.api.BindingRuntimeContext;
  14 import org.opendaylight.mdsal.binding.runtime.osgi.OSGiBindingRuntimeContext;
  15 import org.opendaylight.mdsal.binding.runtime.spi.ForwardingBindingRuntimeContext;
  16 import org.osgi.service.component.annotations.Activate;
  17 import org.osgi.service.component.annotations.Component;
  18 import org.osgi.service.component.annotations.Deactivate;
  19 import org.osgi.service.component.annotations.Reference;
  20 import org.slf4j.Logger;
  21 import org.slf4j.LoggerFactory;
  22
  23 /**
  24  * A global {@link BindingRuntimeContext}. It is injected with latest {@link OSGiBindingRuntimeContext} generation.
  25  */
  26 @Component(service = BindingRuntimeContext.class, immediate = true)
  27 public final class GlobalBindingRuntimeContext extends ForwardingBindingRuntimeContext {
  28     private static final Logger LOG = LoggerFactory.getLogger(GlobalBindingRuntimeContext.class);
  29
  30     private final UnsignedLong generation;
  31     private BindingRuntimeContext delegate;
  32
  33     @Activate
  34     public GlobalBindingRuntimeContext(@Reference final OSGiBindingRuntimeContext osgi) {
  35         generation = osgi.getGeneration();
  36         delegate = osgi.getService();
  37         LOG.info("Global BindingRuntimeContext generation {} activated", generation);
  38     }
  39
  40     @Override
  41     protected BindingRuntimeContext delegate() {
  42         return verifyNotNull(delegate);
  43     }
  44
  45     @Deactivate
  46     void deactivate() {
  47         delegate = null;
  48         LOG.info("Global BindingRuntimeContext generation {} deactivated", generation);
  49     }
  50 }