| /* |
| * Copyright 2017-present Open Networking Foundation |
| * |
| * Licensed under the Apache License, Version 2.0 (the "License"); |
| * you may not use this file except in compliance with the License. |
| * You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| package org.opencord.sadis.impl; |
| |
| import java.io.IOException; |
| import java.io.InputStream; |
| import java.net.MalformedURLException; |
| import java.net.URL; |
| import java.util.Map; |
| import java.util.concurrent.TimeUnit; |
| |
| import org.opencord.sadis.SubscriberAndDeviceInformation; |
| import org.opencord.sadis.SubscriberAndDeviceInformationService; |
| |
| import com.fasterxml.jackson.databind.ObjectMapper; |
| import com.fasterxml.jackson.databind.module.SimpleModule; |
| import com.google.common.cache.Cache; |
| import com.google.common.cache.CacheBuilder; |
| import com.google.common.collect.Maps; |
| import org.onlab.packet.VlanId; |
| import org.onlab.packet.Ip4Address; |
| |
| import org.slf4j.Logger; |
| import org.slf4j.LoggerFactory; |
| |
| |
| public abstract class SubscriberAndDeviceInformationAdapter implements SubscriberAndDeviceInformationService { |
| |
| private final Logger log = LoggerFactory.getLogger(this.getClass()); |
| |
| private static final int DEFAULT_MAXIMUM_CACHE_SIZE = 0; |
| private static final long DEFAULT_TTL = 0; |
| |
| private String url; |
| private ObjectMapper mapper; |
| private Cache<String, SubscriberAndDeviceInformation> cache; |
| private int maxiumCacheSize = DEFAULT_MAXIMUM_CACHE_SIZE; |
| private long cacheEntryTtl = DEFAULT_TTL; |
| |
| private Map<String, SubscriberAndDeviceInformation> localCfgData = null; |
| |
| public SubscriberAndDeviceInformationAdapter() { |
| cache = CacheBuilder.newBuilder().maximumSize(maxiumCacheSize) |
| .expireAfterAccess(cacheEntryTtl, TimeUnit.SECONDS).build(); |
| mapper = new ObjectMapper(); |
| SimpleModule module = new SimpleModule(); |
| SadisConfig config = new SadisConfig(); |
| SadisConfig.VlanIdDeserializer vlanID = config.new VlanIdDeserializer(); |
| SadisConfig.Ip4AddressDeserializer ip4Address = config.new Ip4AddressDeserializer(); |
| module.addDeserializer(VlanId.class, vlanID); |
| module.addDeserializer(Ip4Address.class, ip4Address); |
| mapper.registerModule(module); |
| } |
| |
| /** |
| * Configures the Adapter for data source and cache parameters. |
| * |
| * @param cfg Configuration data. |
| */ |
| public void configure(SadisConfig cfg) { |
| String url = null; |
| try { |
| // if the url is not present then assume data is in netcfg |
| if (cfg.getUrl() != null) { |
| url = cfg.getUrl().toString(); |
| } else { |
| localCfgData = Maps.newConcurrentMap(); |
| |
| cfg.getEntries().forEach(entry -> { |
| localCfgData.put(entry.id(), entry); |
| }); |
| log.info("url is null, data source is local netcfg data"); |
| } |
| } catch (MalformedURLException mUrlEx) { |
| log.error("Invalid URL specified: {}", mUrlEx); |
| } |
| |
| int maximumCacheSeize = cfg.getCacheMaxSize(); |
| long cacheEntryTtl = cfg.getCacheTtl().getSeconds(); |
| |
| // Rebuild cache if needed |
| if (isurlChanged(url) || maximumCacheSeize != this.maxiumCacheSize || |
| cacheEntryTtl != this.cacheEntryTtl) { |
| this.maxiumCacheSize = maximumCacheSeize; |
| this.cacheEntryTtl = cacheEntryTtl; |
| this.url = url; |
| |
| Cache<String, SubscriberAndDeviceInformation> newCache = CacheBuilder.newBuilder() |
| .maximumSize(maxiumCacheSize).expireAfterAccess(cacheEntryTtl, TimeUnit.SECONDS).build(); |
| Cache<String, SubscriberAndDeviceInformation> oldCache = cache; |
| |
| synchronized (this) { |
| cache = newCache; |
| } |
| |
| oldCache.invalidateAll(); |
| oldCache.cleanUp(); |
| } |
| } |
| |
| private boolean isurlChanged(String url) { |
| if (url == null && this.url == null) { |
| return false; |
| } |
| return !((url == this.url) || (url != null && url.equals(this.url))); |
| } |
| |
| /* |
| * (non-Javadoc) |
| * |
| * @see |
| * org.opencord.sadis.SubscriberAndDeviceInformationService#clearCache() |
| */ |
| @Override |
| public void invalidateAll() { |
| cache.invalidateAll(); |
| } |
| |
| /* |
| * (non-Javadoc) |
| * |
| * @see |
| * org.opencord.sadis.SubscriberAndDeviceInformationService#invalidateId() |
| */ |
| @Override |
| public void invalidateId(String id) { |
| cache.invalidate(id); |
| } |
| |
| /* |
| * (non-Javadoc) |
| * |
| * @see |
| * org.opencord.sadis.SubscriberAndDeviceInformationService#getfromCache(java.lang. |
| * String) |
| */ |
| @Override |
| public SubscriberAndDeviceInformation getfromCache(String id) { |
| Cache<String, SubscriberAndDeviceInformation> local; |
| synchronized (this) { |
| local = cache; |
| } |
| SubscriberAndDeviceInformation info = local.getIfPresent(id); |
| if (info != null) { |
| return info; |
| } |
| return null; |
| } |
| |
| /* |
| * (non-Javadoc) |
| * |
| * @see |
| * org.opencord.sadis.SubscriberAndDeviceInformationService#get(java.lang. |
| * String) |
| */ |
| @Override |
| public SubscriberAndDeviceInformation get(String id) { |
| Cache<String, SubscriberAndDeviceInformation> local; |
| synchronized (this) { |
| local = cache; |
| } |
| |
| SubscriberAndDeviceInformation info = local.getIfPresent(id); |
| if (info != null) { |
| return info; |
| } |
| |
| /* |
| * Not in cache, if we have a URL configured we can attempt to get it |
| * from there, else check for it in the locally configured data |
| */ |
| if (this.url == null) { |
| info = (localCfgData == null) ? null : localCfgData.get(id); |
| |
| if (info != null) { |
| local.put(id, info); |
| return info; |
| } |
| } else { |
| // Augment URL with query parameters |
| StringBuilder buf = new StringBuilder(this.url); |
| if (buf.charAt(buf.length() - 1) != '/') { |
| buf.append('/'); |
| } |
| |
| buf.append(id); |
| |
| try (InputStream io = new URL(buf.toString()).openStream()) { |
| info = mapper.readValue(io, SubscriberAndDeviceInformation.class); |
| local.put(id, info); |
| return info; |
| } catch (IOException e) { |
| // TODO Auto-generated catch block |
| log.warn("Exception while reading remote data " + e.getMessage()); |
| } |
| } |
| log.error("Data not found for id {}", id); |
| return null; |
| } |
| } |