elanmanager/api/src/main/java/org/opendaylight/netvirt/elanmanager/utils/ElanL2GwCacheUtils.java

   1 /*
   2  * Copyright © 2016, 2017 Ericsson India Global Services Pvt Ltd. 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.netvirt.elanmanager.utils;
   9
  10 import com.google.common.cache.CacheBuilder;
  11 import com.google.common.cache.CacheLoader;
  12 import com.google.common.cache.LoadingCache;
  13 import java.util.ArrayList;
  14 import java.util.Collection;
  15 import java.util.Collections;
  16 import java.util.List;
  17 import java.util.Map.Entry;
  18 import java.util.Set;
  19 import java.util.concurrent.ConcurrentHashMap;
  20 import java.util.concurrent.ConcurrentMap;
  21 import org.eclipse.jdt.annotation.NonNull;
  22 import org.eclipse.jdt.annotation.Nullable;
  23 import org.opendaylight.netvirt.neutronvpn.api.l2gw.L2GatewayDevice;
  24
  25 public final class ElanL2GwCacheUtils {
  26
  27     private static final LoadingCache<String, ConcurrentMap<String, L2GatewayDevice>> CACHES = CacheBuilder.newBuilder()
  28             .build(new CacheLoader<String, ConcurrentMap<String, L2GatewayDevice>>() {
  29                 @Override
  30                 public ConcurrentMap<String, L2GatewayDevice> load(String key) {
  31                     return new ConcurrentHashMap<>();
  32                 }
  33             });
  34
  35     private ElanL2GwCacheUtils() {
  36     }
  37
  38     public static void addL2GatewayDeviceToCache(String elanName, L2GatewayDevice l2GwDevice) {
  39         CACHES.getUnchecked(elanName).put(l2GwDevice.getHwvtepNodeId(), l2GwDevice);
  40     }
  41
  42     public static void removeL2GatewayDeviceFromAllElanCache(String deviceName) {
  43         CACHES.asMap().values().forEach(deviceMap -> deviceMap.remove(deviceName));
  44     }
  45
  46     @Nullable
  47     public static L2GatewayDevice removeL2GatewayDeviceFromCache(String elanName, String l2gwDeviceNodeId) {
  48         ConcurrentMap<String, L2GatewayDevice> deviceMap = CACHES.getIfPresent(elanName);
  49         return deviceMap == null ? null : deviceMap.remove(l2gwDeviceNodeId);
  50     }
  51
  52     @Nullable
  53     public static L2GatewayDevice getL2GatewayDeviceFromCache(String elanName, String l2gwDeviceNodeId) {
  54         ConcurrentMap<String, L2GatewayDevice> deviceMap = CACHES.getIfPresent(elanName);
  55         return deviceMap == null ? null : deviceMap.get(l2gwDeviceNodeId);
  56     }
  57
  58     public static Collection<L2GatewayDevice> getInvolvedL2GwDevices(String elanName) {
  59         ConcurrentMap<String, L2GatewayDevice> result = CACHES.getIfPresent(elanName);
  60         return result == null ? Collections.emptyList() : result.values();
  61     }
  62
  63     public static Set<Entry<String, ConcurrentMap<String, L2GatewayDevice>>> getCaches() {
  64         return CACHES.asMap().entrySet();
  65     }
  66
  67     @NonNull
  68     public static List<L2GatewayDevice> getAllElanDevicesFromCache() {
  69         List<L2GatewayDevice> l2GwDevices = new ArrayList<>();
  70         for (ConcurrentMap<String, L2GatewayDevice> cache : CACHES.asMap().values()) {
  71             l2GwDevices.addAll(cache.values());
  72         }
  73         return l2GwDevices;
  74     }
  75 }