diff options
Diffstat (limited to 'authz-cass/src/main/java/org/onap/aaf/dao/CachedDAO.java')
| -rw-r--r-- | authz-cass/src/main/java/org/onap/aaf/dao/CachedDAO.java | 229 |
1 files changed, 229 insertions, 0 deletions
diff --git a/authz-cass/src/main/java/org/onap/aaf/dao/CachedDAO.java b/authz-cass/src/main/java/org/onap/aaf/dao/CachedDAO.java new file mode 100644 index 00000000..4237b91e --- /dev/null +++ b/authz-cass/src/main/java/org/onap/aaf/dao/CachedDAO.java @@ -0,0 +1,229 @@ +/*******************************************************************************
+ * ============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 org.onap.aaf.dao;
+
+import java.util.ArrayList;
+import java.util.List;
+
+import org.onap.aaf.authz.layer.Result;
+import org.onap.aaf.dao.aaf.cass.Status;
+
+import org.onap.aaf.inno.env.Trans;
+
+/**
+ * CachedDAO
+ *
+ * Cache the response of "get" of any DAO.
+ *
+ * For simplicity's sake, at this time, we only do this for single Object keys
+ *
+ *
+ * @param <DATA>
+ */
+public class CachedDAO<TRANS extends Trans,D extends DAO<TRANS,DATA>,DATA extends Cacheable>
+ extends Cached<TRANS,DATA> implements DAO_RO<TRANS,DATA>{
+// private final String dirty_str;
+
+ private final D dao;
+
+ public CachedDAO(D dao, CIDAO<TRANS> info, int segsize) {
+ super(info, dao.table(), segsize);
+
+ // Instantiate a new Cache per DAO name (so separate instances use the same cache)
+ this.dao = dao;
+ //read_str = "Cached READ for " + dao.table();
+// dirty_str = "Cache DIRTY on " + dao.table();
+ if(dao instanceof CassDAOImpl) {
+ ((CassDAOImpl<?,?>)dao).cache = this;
+ }
+ }
+
+ public static<T extends Trans, DA extends DAO<T,DT>, DT extends Cacheable>
+ CachedDAO<T,DA,DT> create(DA dao, CIDAO<T> info, int segsize) {
+ return new CachedDAO<T,DA,DT>(dao,info, segsize);
+ }
+
+ public void add(DATA data) {
+ String key = keyFromObjs(dao.keyFrom(data));
+ List<DATA> list = new ArrayList<DATA>();
+ list.add(data);
+ super.add(key,list);
+ }
+
+// public void invalidate(TRANS trans, Object ... objs) {
+// TimeTaken tt = trans.start(dirty_str, Env.SUB);
+// try {
+// super.invalidate(keyFromObjs(objs));
+// } finally {
+// tt.done();
+// }
+// }
+
+ public static String keyFromObjs(Object ... objs) {
+ String key;
+ if(objs.length==1 && objs[0] instanceof String) {
+ key = (String)objs[0];
+ } else {
+ StringBuilder sb = new StringBuilder();
+ boolean first = true;
+ for(Object o : objs) {
+ if(o!=null) {
+ if(first) {
+ first =false;
+ } else {
+ sb.append('|');
+ }
+ sb.append(o.toString());
+ }
+ }
+ key = sb.toString();
+ }
+ return key;
+ }
+
+ public Result<DATA> create(TRANS trans, DATA data) {
+ Result<DATA> d = dao.create(trans,data);
+ if(d.status==Status.OK) {
+ add(d.value);
+ } else {
+ trans.error().log(d.errorString());
+ }
+ invalidate(trans,data);
+ return d;
+ }
+
+ protected class DAOGetter implements Getter<DATA> {
+ protected TRANS trans;
+ protected Object objs[];
+ protected D dao;
+ public Result<List<DATA>> result;
+
+ public DAOGetter(TRANS trans, D dao, Object ... objs) {
+ this.trans = trans;
+ this.dao = dao;
+ this.objs = objs;
+ }
+
+ /**
+ * Separated into single call for easy overloading
+ * @return
+ */
+ public Result<List<DATA>> call() {
+ return dao.read(trans, objs);
+ }
+
+ @Override
+ public final Result<List<DATA>> get() {
+ return call();
+// if(result.isOKhasData()) { // Note, given above logic, could exist, but stale
+// return result.value;
+// } else {
+// return null;
+// }
+ }
+ }
+
+ @Override
+ public Result<List<DATA>> read(final TRANS trans, final Object ... objs) {
+ DAOGetter getter = new DAOGetter(trans,dao,objs);
+ return get(trans, keyFromObjs(objs),getter);
+// if(ld!=null) {
+// return Result.ok(ld);//.emptyList(ld.isEmpty());
+// }
+// // Result Result if exists
+// if(getter.result==null) {
+// return Result.err(Status.ERR_NotFound, "No Cache or Lookup found on [%s]",dao.table());
+// }
+// return getter.result;
+ }
+
+ // Slight Improved performance available when String and Obj versions are known.
+ public Result<List<DATA>> read(final String key, final TRANS trans, final Object ... objs) {
+ DAOGetter getter = new DAOGetter(trans,dao,objs);
+ return get(trans, key, getter);
+// if(ld!=null) {
+// return Result.ok(ld);//.emptyList(ld.isEmpty());
+// }
+// // Result Result if exists
+// if(getter.result==null) {
+// return Result.err(Status.ERR_NotFound, "No Cache or Lookup found on [%s]",dao.table());
+// }
+// return getter.result;
+ }
+
+ @Override
+ public Result<List<DATA>> read(TRANS trans, DATA data) {
+ return read(trans,dao.keyFrom(data));
+ }
+ public Result<Void> update(TRANS trans, DATA data) {
+ Result<Void> d = dao.update(trans, data);
+ if(d.status==Status.OK) {
+ add(data);
+ } else {
+ trans.error().log(d.errorString());
+ }
+ return d;
+ }
+
+ public Result<Void> delete(TRANS trans, DATA data, boolean reread) {
+ if(reread) { // If reread, get from Cache, if possible, not DB exclusively
+ Result<List<DATA>> rd = read(trans,data);
+ if(rd.notOK()) {
+ return Result.err(rd);
+ } else {
+ trans.error().log(rd.errorString());
+ }
+ if(rd.isEmpty()) {
+ data.invalidate(this);
+ return Result.err(Status.ERR_NotFound,"Not Found");
+ }
+ data = rd.value.get(0);
+ }
+ Result<Void> rv=dao.delete(trans, data, false);
+ data.invalidate(this);
+ return rv;
+ }
+
+ @Override
+ public void close(TRANS trans) {
+ if(dao!=null) {
+ dao.close(trans);
+ }
+ }
+
+
+ @Override
+ public String table() {
+ return dao.table();
+ }
+
+ public D dao() {
+ return dao;
+ }
+
+ public void invalidate(TRANS trans, DATA data) {
+ if(info.touch(trans, dao.table(),data.invalidate(this)).notOK()) {
+ trans.error().log("Cannot touch CacheInfo for Role");
+ }
+ }
+}
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