diff options
Diffstat (limited to 'authz-core/src/main/java/com/att/cache/Cache.java')
| -rw-r--r-- | authz-core/src/main/java/com/att/cache/Cache.java | 195 |
1 files changed, 0 insertions, 195 deletions
diff --git a/authz-core/src/main/java/com/att/cache/Cache.java b/authz-core/src/main/java/com/att/cache/Cache.java deleted file mode 100644 index 74b15771..00000000 --- a/authz-core/src/main/java/com/att/cache/Cache.java +++ /dev/null @@ -1,195 +0,0 @@ -/*******************************************************************************
- * ============LICENSE_START====================================================
- * * org.onap.aaf
- * * ===========================================================================
- * * Copyright © 2017 AT&T Intellectual Property. All rights reserved.
- * * ===========================================================================
- * * 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.
- * * ============LICENSE_END====================================================
- * *
- * * ECOMP is a trademark and service mark of AT&T Intellectual Property.
- * *
- ******************************************************************************/
-package com.att.cache;
-
-import java.util.ArrayList;
-import java.util.Date;
-import java.util.HashMap;
-import java.util.HashSet;
-import java.util.List;
-import java.util.Map;
-import java.util.Set;
-import java.util.Timer;
-import java.util.TimerTask;
-import java.util.concurrent.ConcurrentHashMap;
-import java.util.logging.Level;
-
-import com.att.inno.env.Env;
-import com.att.inno.env.Trans;
-
-/**
- * Create and maintain a Map of Maps used for Caching
- *
- *
- * @param <TRANS>
- * @param <DATA>
- */
-public class Cache<TRANS extends Trans, DATA> {
- private static Clean clean;
- private static Timer cleanseTimer;
-
- public static final String CACHE_HIGH_COUNT = "CACHE_HIGH_COUNT";
- public static final String CACHE_CLEAN_INTERVAL = "CACHE_CLEAN_INTERVAL";
-// public static final String CACHE_MIN_REFRESH_INTERVAL = "CACHE_MIN_REFRESH_INTERVAL";
-
- private static final Map<String,Map<String,Dated>> cacheMap;
-
- static {
- cacheMap = new HashMap<String,Map<String,Dated>>();
- }
-
- /**
- * Dated Class - store any Data with timestamp
- *
- *
- */
- public final static class Dated {
- public Date timestamp;
- public List<?> data;
-
- public Dated(List<?> data) {
- timestamp = new Date();
- this.data = data;
- }
-
- public <T> Dated(T t) {
- timestamp = new Date();
- ArrayList<T> al = new ArrayList<T>(1);
- al.add(t);
- data = al;
- }
-
- public void touch() {
- timestamp = new Date();
- }
- }
-
- public static Map<String,Dated> obtain(String key) {
- Map<String, Dated> m = cacheMap.get(key);
- if(m==null) {
- m = new ConcurrentHashMap<String, Dated>();
- synchronized(cacheMap) {
- cacheMap.put(key, m);
- }
- }
- return m;
- }
-
- /**
- * Clean will examine resources, and remove those that have expired.
- *
- * If "highs" have been exceeded, then we'll expire 10% more the next time. This will adjust after each run
- * without checking contents more than once, making a good average "high" in the minimum speed.
- *
- *
- */
- private final static class Clean extends TimerTask {
- private final Env env;
- private Set<String> set;
-
- // The idea here is to not be too restrictive on a high, but to Expire more items by
- // shortening the time to expire. This is done by judiciously incrementing "advance"
- // when the "highs" are exceeded. This effectively reduces numbers of cached items quickly.
- private final int high;
- private long advance;
- private final long timeInterval;
-
- public Clean(Env env, long cleanInterval, int highCount) {
- this.env = env;
- high = highCount;
- timeInterval = cleanInterval;
- advance = 0;
- set = new HashSet<String>();
- }
-
- public synchronized void add(String key) {
- set.add(key);
- }
-
- public void run() {
- int count = 0;
- int total = 0;
- // look at now. If we need to expire more by increasing "now" by "advance"
- Date now = new Date(System.currentTimeMillis() + advance);
-
-
- for(String name : set) {
- Map<String,Dated> map = cacheMap.get(name);
- if(map!=null) for(Map.Entry<String,Dated> me : map.entrySet()) {
- ++total;
- if(me.getValue().timestamp.before(now)) {
- map.remove(me.getKey());
- ++count;
- }
- }
-// if(count>0) {
-// env.info().log(Level.INFO, "Cache removed",count,"expired",name,"Elements");
-// }
- }
-
- if(count>0) {
- env.info().log(Level.INFO, "Cache removed",count,"expired Cached Elements out of", total);
- }
-
- // If High (total) is reached during this period, increase the number of expired services removed for next time.
- // There's no point doing it again here, as there should have been cleaned items.
- if(total>high) {
- // advance cleanup by 10%, without getting greater than timeInterval.
- advance = Math.min(timeInterval, advance+(timeInterval/10));
- } else {
- // reduce advance by 10%, without getting lower than 0.
- advance = Math.max(0, advance-(timeInterval/10));
- }
- }
- }
-
- public static synchronized void startCleansing(Env env, String ... keys) {
- if(cleanseTimer==null) {
- cleanseTimer = new Timer("Cache Cleanup Timer");
- int cleanInterval = Integer.parseInt(env.getProperty(CACHE_CLEAN_INTERVAL,"60000")); // 1 minute clean cycles
- int highCount = Integer.parseInt(env.getProperty(CACHE_HIGH_COUNT,"5000"));
- cleanseTimer.schedule(clean = new Clean(env, cleanInterval, highCount), cleanInterval, cleanInterval);
- }
-
- for(String key : keys) {
- clean.add(key);
- }
- }
-
- public static void stopTimer() {
- if(cleanseTimer!=null) {
- cleanseTimer.cancel();
- cleanseTimer = null;
- }
- }
-
- public static void addShutdownHook() {
- Runtime.getRuntime().addShutdownHook(new Thread() {
- @Override
- public void run() {
- Cache.stopTimer();
- }
- });
- }
-
-}
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