initial commit
Change-Id: Idddb494b6593de2188b5c837f3caa46c0e956573
diff --git a/src/main/java/org/opencord/sadis/SubscriberAndDeviceInformationAdapter.java b/src/main/java/org/opencord/sadis/SubscriberAndDeviceInformationAdapter.java
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+++ b/src/main/java/org/opencord/sadis/SubscriberAndDeviceInformationAdapter.java
@@ -0,0 +1,117 @@
+/*
+ * Copyright 2017-present Open Networking Laboratory
+ *
+ * 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;
+
+import java.io.IOException;
+import java.io.InputStream;
+import java.net.URL;
+import java.util.concurrent.TimeUnit;
+
+import com.fasterxml.jackson.databind.ObjectMapper;
+import com.google.common.cache.Cache;
+import com.google.common.cache.CacheBuilder;
+
+public abstract class SubscriberAndDeviceInformationAdapter implements SubscriberAndDeviceInformationService {
+ private static final int DEFAULT_MAXIMUM_CACHE_SIZE = 0;
+ private static final long DEFAULT_TTL = 0;
+
+ private String url;
+ private Cache<String, SubscriberAndDeviceInformation> cache;
+ private int maxiumCacheSize = DEFAULT_MAXIMUM_CACHE_SIZE;
+ private long cacheEntryTtl = DEFAULT_TTL;
+
+ public SubscriberAndDeviceInformationAdapter() {
+ cache = CacheBuilder.newBuilder().maximumSize(maxiumCacheSize)
+ .expireAfterAccess(cacheEntryTtl, TimeUnit.SECONDS).build();
+ }
+
+ public void configure(String url, int maximumCacheSeize, long cacheEntryTtl) {
+ // Rebuild cache if needed
+ if (url != this.url || maximumCacheSeize != this.maxiumCacheSize || cacheEntryTtl != this.cacheEntryTtl) {
+ this.url = url;
+ this.maxiumCacheSize = maximumCacheSeize;
+ this.cacheEntryTtl = cacheEntryTtl;
+ 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();
+ }
+ }
+
+ /*
+ * (non-Javadoc)
+ *
+ * @see
+ * org.opencord.sadis.SubscriberAndDeviceInformationService#clearCache()
+ */
+ @Override
+ public void invalidateAll() {
+ cache.invalidateAll();
+ }
+
+ /*
+ * (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.
+ */
+ if (this.url == null) {
+ return null;
+ }
+
+ // 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()) {
+ ObjectMapper mapper = new ObjectMapper();
+ info = mapper.readValue(io, SubscriberAndDeviceInformation.class);
+ local.put(id, info);
+ return info;
+ } catch (IOException e) {
+ // TODO Auto-generated catch block
+ e.printStackTrace();
+ }
+ return null;
+ }
+}