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/*
* ============LICENSE_START==========================================
* org.onap.music
* ===================================================================
* Copyright (c) 2017 AT&T Intellectual Property
* ===================================================================
* 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.music.datastore;
import java.util.HashMap;
import java.util.Map;
import com.datastax.driver.core.Cluster;
import com.datastax.driver.core.Session;
import org.onap.music.eelf.logging.EELFLoggerDelegate;
import org.onap.music.exceptions.MusicServiceException;
import org.onap.music.main.MusicUtil;
import com.datastax.driver.core.ResultSet;
import com.datastax.driver.core.TableMetadata;
public class MusicDataStoreHandle {
public static MusicDataStore mDstoreHandle = null;
private static EELFLoggerDelegate logger = EELFLoggerDelegate.getLogger(MusicDataStoreHandle.class);
/**
*
* @return
* @throws MusicServiceException
*/
private static MusicDataStore getDSHandle() throws MusicServiceException {
logger.info(EELFLoggerDelegate.applicationLogger,"Acquiring data store handle");
long start = System.currentTimeMillis();
if (mDstoreHandle == null) {
try {
MusicUtil.loadProperties();
} catch (Exception e) {
logger.error(EELFLoggerDelegate.errorLogger, "No properties file defined. Falling back to default.");
}
// Quick Fix - Best to put this into every call to getInstanceDSHandle?
Cluster cluster = CassandraClusterBuilder.connectSmart(MusicUtil.getMyCassaHost());
Session session = cluster.connect();
mDstoreHandle = new MusicDataStore(cluster, session);
}
if(mDstoreHandle.getSession() == null) {
String message = "Connection to Cassandra has not been enstablished."
+ " Please check connection properites and reboot.";
logger.info(EELFLoggerDelegate.applicationLogger, message);
throw new MusicServiceException(message);
}
long end = System.currentTimeMillis();
logger.info(EELFLoggerDelegate.applicationLogger,"Time taken to acquire data store handle:" + (end - start) + " ms");
return mDstoreHandle;
}
/**
*
* @param keyspace
* @param tablename
* @return
* @throws MusicServiceException
*/
public static TableMetadata returnColumnMetadata(String keyspace, String tablename) throws MusicServiceException {
return MusicDataStoreHandle.getDSHandle().returnColumnMetadata(keyspace, tablename);
}
/**
*
* @param results
* @return
* @throws MusicServiceException
*/
public static Map<String, HashMap<String, Object>> marshallResults(ResultSet results) throws MusicServiceException {
return MusicDataStoreHandle.getDSHandle().marshalData(results);
}
}
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