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