gerrit.opnfv Code Review - onosfw.git/blob

   1 /*
   2  * Copyright 2015 Open Networking Laboratory
   3  *
   4  * Licensed under the Apache License, Version 2.0 (the "License");
   5  * you may not use this file except in compliance with the License.
   6  * You may obtain a copy of the License at
   7  *
   8  *     http://www.apache.org/licenses/LICENSE-2.0
   9  *
  10  * Unless required by applicable law or agreed to in writing, software
  11  * distributed under the License is distributed on an "AS IS" BASIS,
  12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  13  * See the License for the specific language governing permissions and
  14  * limitations under the License.
  15  */
  16 package org.onosproject.net.newresource.impl;
  17
  18 import org.onosproject.net.Device;
  19 import org.onosproject.net.Port;
  20 import org.onosproject.net.device.DeviceEvent;
  21 import org.onosproject.net.device.DeviceListener;
  22 import org.onosproject.net.newresource.ResourceAdminService;
  23 import org.onosproject.net.newresource.ResourcePath;
  24
  25 import java.util.concurrent.ExecutorService;
  26
  27 import static com.google.common.base.Preconditions.checkNotNull;
  28
  29 /**
  30  * An implementation of DeviceListener registering devices as resources.
  31  */
  32 final class ResourceDeviceListener implements DeviceListener {
  33
  34     private final ResourceAdminService adminService;
  35     private final ExecutorService executor;
  36
  37     /**
  38      * Creates an instance with the specified ResourceAdminService and ExecutorService.
  39      *
  40      * @param adminService instance invoked to register resources
  41      * @param executor executor used for processing resource registration
  42      */
  43     ResourceDeviceListener(ResourceAdminService adminService, ExecutorService executor) {
  44         this.adminService = checkNotNull(adminService);
  45         this.executor = checkNotNull(executor);
  46     }
  47
  48     @Override
  49     public void event(DeviceEvent event) {
  50         Device device = event.subject();
  51         switch (event.type()) {
  52             case DEVICE_ADDED:
  53                 registerDeviceResource(device);
  54                 break;
  55             case DEVICE_REMOVED:
  56                 unregisterDeviceResource(device);
  57                 break;
  58             case PORT_ADDED:
  59                 registerPortResource(device, event.port());
  60                 break;
  61             case PORT_REMOVED:
  62                 unregisterPortResource(device, event.port());
  63                 break;
  64             default:
  65                 break;
  66         }
  67     }
  68
  69     private void registerDeviceResource(Device device) {
  70         executor.submit(() -> adminService.registerResources(ResourcePath.ROOT, device.id()));
  71     }
  72
  73     private void unregisterDeviceResource(Device device) {
  74         executor.submit(() -> adminService.unregisterResources(ResourcePath.ROOT, device.id()));
  75     }
  76
  77     private void registerPortResource(Device device, Port port) {
  78         ResourcePath parent = ResourcePath.discrete(device.id());
  79         executor.submit(() -> adminService.registerResources(parent, port.number()));
  80     }
  81
  82     private void unregisterPortResource(Device device, Port port) {
  83         ResourcePath parent = ResourcePath.discrete(device.id());
  84         executor.submit(() -> adminService.unregisterResources(parent, port.number()));
  85     }
  86 }