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/*-
* ============LICENSE_START=======================================================
* ONAP : APPC
* ================================================================================
* Copyright (C) 2019 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=========================================================
*/
package org.onap.appc.data.services.db;
import java.sql.SQLException;
import java.util.ArrayList;
import javax.sql.rowset.CachedRowSet;
import org.onap.ccsdk.sli.core.dblib.DBResourceManager;
import org.onap.ccsdk.sli.core.dblib.DbLibService;
import org.onap.ccsdk.sli.core.sli.SvcLogicContext;
import org.onap.ccsdk.sli.core.sli.SvcLogicResource.QueryStatus;
import org.onap.ccsdk.sli.core.sli.provider.SvcLogicService;
import org.osgi.framework.Bundle;
import org.osgi.framework.BundleContext;
import org.osgi.framework.FrameworkUtil;
import org.osgi.framework.ServiceReference;
import com.att.eelf.configuration.EELFLogger;
import com.att.eelf.configuration.EELFManager;
public class DbLibServiceQueries {
private static final String DBLIB_SERVICE = "org.onap.ccsdk.sli.core.dblib.DbLibService";
private static final EELFLogger log = EELFManager.getInstance().getLogger(DbLibServiceQueries.class);
DbLibService dbLibService;
public DbLibServiceQueries() {
this.dbLibService = getDbLibService();
if(this.dbLibService == null) {
throw new NullPointerException("DbLibService reference not found");
}
}
public DbLibServiceQueries(DbLibService dbLibService) {
this.dbLibService = dbLibService;
if(this.dbLibService == null) {
throw new NullPointerException("Provided DbLibService is null");
}
}
public DbLibServiceQueries(DbLibService dbLibService, boolean allowNull) {
this.dbLibService = dbLibService;
if(this.dbLibService == null && !allowNull) {
throw new NullPointerException("Provided DbLibService is null");
}
}
public QueryStatus query(String query, SvcLogicContext ctx) {
ArrayList<String> arguments = new ArrayList<>();
query = CtxParameterizedResolver.resolveCtxVars(query, ctx, arguments);
return performQuery(query, ctx, null, arguments);
}
public QueryStatus query(String query, String prefix, SvcLogicContext ctx) {
ArrayList<String> arguments = new ArrayList<>();
query = CtxParameterizedResolver.resolveCtxVars(query, ctx, arguments);
return performQuery(query, ctx, prefix, arguments);
}
public QueryStatus query(String query, SvcLogicContext ctx, ArrayList<String> arguments) {
return performQuery(query, ctx, null, valueOfArrayList(arguments));
}
public QueryStatus query(String query, SvcLogicContext ctx, String prefix, ArrayList<String> arguments) {
return performQuery(query, ctx, prefix, valueOfArrayList(arguments));
}
private QueryStatus performQuery(String query, SvcLogicContext ctx, String prefix, ArrayList<String> arguments) {
CachedRowSet result = null;
try {
result = dbLibService.getData(query, arguments, null);
if (!result.next()) {
log.debug("No data found");
return QueryStatus.NOT_FOUND;
} else {
CtxParameterizedResolver.saveCachedRowSetToCtx(result, ctx, prefix, dbLibService);
}
} catch (SQLException e) {
log.error("Exception in query()",e);
return QueryStatus.FAILURE;
}
return QueryStatus.SUCCESS;
}
public QueryStatus save(String query, SvcLogicContext ctx) {
ArrayList<String> arguments = new ArrayList<>();
query = CtxParameterizedResolver.resolveCtxVars(query, ctx, arguments);
return performSave(query, arguments);
}
public QueryStatus save(String query, SvcLogicContext ctx, ArrayList<String> arguments) {
return performSave(query, valueOfArrayList(arguments));
}
private QueryStatus performSave(String query, ArrayList<String> arguments) {
boolean success = false;
try {
success = dbLibService.writeData(query, arguments, null);
} catch (SQLException e) {
log.error("Exception in save()",e);
success = false;
}
if(success) {
return QueryStatus.SUCCESS;
}
return QueryStatus.FAILURE;
}
private static DbLibService getDbLibService() {
DbLibService dbLibService = null;
BundleContext bundleContext = null;
ServiceReference serviceRef = null;
Bundle bundle = FrameworkUtil.getBundle(SvcLogicService.class);
if (bundle != null) {
bundleContext = bundle.getBundleContext();
}
if (bundleContext != null) {
log.debug("Getting bundle Context");
serviceRef = bundleContext.getServiceReference(DBLIB_SERVICE);
}
if (serviceRef == null) {
log.warn("Could not find service reference for DBLib service");
} else {
dbLibService = (DbLibService)bundleContext.getService(serviceRef);
if (dbLibService == null) {
log.warn("DBLIB_SERVICE is null");
}
}
if (dbLibService == null) {
try {
dbLibService = new DBResourceManager(System.getProperties());
} catch (Exception e) {
log.error("Caught exception trying to create db service", e);
}
if (dbLibService == null) {
log.warn("Could not create new DBResourceManager");
}
}
return dbLibService;
}
//By using String.valueOf on the array list items, we can store any null values as
//Strings with the value "null". This mirrors the way queries worked prior to the
//prepared statements.
private ArrayList<String> valueOfArrayList(ArrayList<String> original) {
ArrayList<String> valueOfList = new ArrayList<>();
for(String s : original) {
valueOfList.add(String.valueOf(s));
}
return valueOfList;
}
}
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