diff options
Diffstat (limited to 'authz-cass/src/main/java/com/att/dao/Cached.java')
| -rw-r--r-- | authz-cass/src/main/java/com/att/dao/Cached.java | 197 |
1 files changed, 0 insertions, 197 deletions
diff --git a/authz-cass/src/main/java/com/att/dao/Cached.java b/authz-cass/src/main/java/com/att/dao/Cached.java deleted file mode 100644 index 302d4f46..00000000 --- a/authz-cass/src/main/java/com/att/dao/Cached.java +++ /dev/null @@ -1,197 +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.dao;
-
-import java.util.Date;
-import java.util.List;
-import java.util.Map;
-import java.util.Timer;
-import java.util.TimerTask;
-
-import com.att.authz.env.AuthzEnv;
-import com.att.authz.env.AuthzTrans;
-import com.att.authz.layer.Result;
-import com.att.cache.Cache;
-import com.att.dao.aaf.cass.Status;
-import com.att.inno.env.Env;
-import com.att.inno.env.Trans;
-
-public class Cached<TRANS extends Trans, DATA extends Cacheable> extends Cache<TRANS,DATA> {
- // Java does not allow creation of Arrays with Generics in them...
- // private Map<String,Dated> cache[];
- protected final CIDAO<TRANS> info;
-
- private static Timer infoTimer;
- private Object cache[];
- public final int segSize;
-
- protected final String name;
-
-
-
- // Taken from String Hash, but coded, to ensure consistent across Java versions. Also covers negative case;
- public int cacheIdx(String key) {
- int h = 0;
- for (int i = 0; i < key.length(); i++) {
- h = 31*h + key.charAt(i);
- }
- if(h<0)h*=-1;
- return h%segSize;
- }
-
- public Cached(CIDAO<TRANS> info, String name, int segSize) {
- this.name =name;
- this.segSize = segSize;
- this.info = info;
- cache = new Object[segSize];
- // Create a new Map for each Segment, and store locally
- for(int i=0;i<segSize;++i) {
- cache[i]=obtain(name+i);
- }
- }
-
- public void add(String key, List<DATA> data) {
- @SuppressWarnings("unchecked")
- Map<String,Dated> map = ((Map<String,Dated>)cache[cacheIdx(key)]);
- map.put(key, new Dated(data));
- }
-
-
- public int invalidate(String key) {
- int cacheIdx = cacheIdx(key);
- @SuppressWarnings("unchecked")
- Map<String,Dated> map = ((Map<String,Dated>)cache[cacheIdx]);
-// if(map.remove(key)!=null) // Not seeming to remove all the time
- if(map!=null)map.clear();
-// System.err.println("Remove " + name + " " + key);
- return cacheIdx;
- }
-
- public Result<Void> invalidate(int segment) {
- if(segment<0 || segment>=cache.length) return Result.err(Status.ERR_BadData,"Cache Segment %s is out of range",Integer.toString(segment));
- @SuppressWarnings("unchecked")
- Map<String,Dated> map = ((Map<String,Dated>)cache[segment]);
- if(map!=null) {
- map.clear();
- }
- return Result.ok();
- }
-
- protected interface Getter<D> {
- public abstract Result<List<D>> get();
- };
-
- // TODO utilize Segmented Caches, and fold "get" into "reads"
- @SuppressWarnings("unchecked")
- public Result<List<DATA>> get(TRANS trans, String key, Getter<DATA> getter) {
- List<DATA> ld = null;
- Result<List<DATA>> rld = null;
-
- int cacheIdx = cacheIdx(key);
- Map<String, Dated> map = ((Map<String,Dated>)cache[cacheIdx]);
-
- // Check for saved element in cache
- Dated cached = map.get(key);
- // Note: These Segment Timestamps are kept up to date with DB
- Date dbStamp = info.get(trans, name,cacheIdx);
-
- // Check for cache Entry and whether it is still good (a good Cache Entry is same or after DBEntry, so we use "before" syntax)
- if(cached!=null && dbStamp.before(cached.timestamp)) {
- ld = (List<DATA>)cached.data;
- rld = Result.ok(ld);
- } else {
- rld = getter.get();
- if(rld.isOK()) { // only store valid lists
- map.put(key, new Dated(rld.value)); // successful item found gets put in cache
-// } else if(rld.status == Result.ERR_Backend){
-// map.remove(key);
- }
- }
- return rld;
- }
-
- /**
- * Each Cached object has multiple Segments that need cleaning. Derive each, and add to Cleansing Thread
- * @param env
- * @param dao
- */
- public static void startCleansing(AuthzEnv env, CachedDAO<?,?,?> ... dao) {
- for(CachedDAO<?,?,?> d : dao) {
- for(int i=0;i<d.segSize;++i) {
- startCleansing(env, d.table()+i);
- }
- }
- }
-
-
- public static<T extends Trans> void startRefresh(AuthzEnv env, CIDAO<AuthzTrans> cidao) {
- if(infoTimer==null) {
- infoTimer = new Timer("CachedDAO Info Refresh Timer");
- int minRefresh = 10*1000*60; // 10 mins Integer.parseInt(env.getProperty(CACHE_MIN_REFRESH_INTERVAL,"2000")); // 2 second minimum refresh
- infoTimer.schedule(new Refresh(env,cidao, minRefresh), 1000, minRefresh); // note: Refresh from DB immediately
- }
- }
-
- public static void stopTimer() {
- Cache.stopTimer();
- if(infoTimer!=null) {
- infoTimer.cancel();
- infoTimer = null;
- }
- }
-
- private final static class Refresh extends TimerTask {
- private static final int maxRefresh = 2*60*10000; // 20 mins
- private AuthzEnv env;
- private CIDAO<AuthzTrans> cidao;
- private int minRefresh;
- private long lastRun;
-
- public Refresh(AuthzEnv env, CIDAO<AuthzTrans> cidao, int minRefresh) {
- this.env = env;
- this.cidao = cidao;
- this.minRefresh = minRefresh;
- lastRun = System.currentTimeMillis()-maxRefresh-1000;
- }
-
- @Override
- public void run() {
- // Evaluate whether to refresh based on transaction rate
- long now = System.currentTimeMillis();
- long interval = now-lastRun;
-
- if(interval < minRefresh || interval < Math.min(env.transRate(),maxRefresh)) return;
- lastRun = now;
- AuthzTrans trans = env.newTransNoAvg();
- Result<Void> rv = cidao.check(trans);
- if(rv.status!=Result.OK) {
- env.error().log("Error in CacheInfo Refresh",rv.details);
- }
- if(env.debug().isLoggable()) {
- StringBuilder sb = new StringBuilder("Cache Info Refresh: ");
- trans.auditTrail(0, sb, Env.REMOTE);
- env.debug().log(sb);
- }
- }
- }
-}
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