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package org.onap.music.main;
import java.util.HashMap;
import java.util.Map;
import org.onap.music.datastore.PreparedQueryObject;
import org.onap.music.exceptions.MusicLockingException;
import org.onap.music.exceptions.MusicQueryException;
import org.onap.music.exceptions.MusicServiceException;
import org.onap.music.service.MusicCoreService;
import org.onap.music.service.impl.MusicCassaCore;
import com.datastax.driver.core.ResultSet;
import com.datastax.driver.core.Row;
/**
*
*/
public class VotingAppJar
{
String keyspaceName;
String tableName;
private static MusicCoreService musicCore = MusicCassaCore.getInstance();
public VotingAppJar() throws MusicServiceException {
keyspaceName = "VotingAppForMusic";
tableName = "votevount";
createVotingKeyspace();
System.out.println("Created keyspaces");
createVotingTable();
System.out.println("Created tables");
createEntryForCandidate("Popeye");
createEntryForCandidate("Judy");
createEntryForCandidate("Flash");
createEntryForCandidate("Mickey");
System.out.println("Created candidates");
}
private void createVotingKeyspace() throws MusicServiceException {
Map<String,Object> replicationInfo = new HashMap<String, Object>();
replicationInfo.put("'class'", "'SimpleStrategy'");
replicationInfo.put("'replication_factor'", 1);
PreparedQueryObject queryObject = new PreparedQueryObject();
queryObject.appendQueryString(
"CREATE KEYSPACE " + keyspaceName + " WITH REPLICATION = " + replicationInfo.toString().replaceAll("=", ":"));
try {
musicCore.nonKeyRelatedPut(queryObject, "eventual");
} catch (MusicServiceException e) {
if (e.getMessage().equals("Keyspace votingappformusic already exists")) {
// ignore
} else {
throw(e);
}
}
}
private void createVotingTable() throws MusicServiceException {
PreparedQueryObject queryObject = new PreparedQueryObject();
queryObject.appendQueryString(
"CREATE TABLE " + keyspaceName + "." + tableName + " (name text PRIMARY KEY, count varint);");
try {
musicCore.createTable(keyspaceName, tableName, queryObject, "eventual");
} catch (MusicServiceException e) {
if (e.getMessage().equals("Table votingappformusic.votevount already exists")) {
//ignore
} else {
throw(e);
}
}
}
private void createEntryForCandidate(String candidateName) throws MusicServiceException {
PreparedQueryObject queryObject = new PreparedQueryObject();
queryObject.appendQueryString(
"INSERT INTO " + keyspaceName + "." + tableName + " (name, count) "
+ "VALUES ('"+candidateName+"', 0);");
musicCore.nonKeyRelatedPut(queryObject, "eventual");
}
public void vote() throws MusicLockingException, MusicQueryException, MusicServiceException {
updateVoteCount("Popeye",5);
updateVoteCount("Judy",7);
updateVoteCount("Mickey",8);
updateVoteCount("Flash",2);
}
private void updateVoteCount(String candidateName, int numVotes) throws MusicLockingException, MusicQueryException, MusicServiceException {
PreparedQueryObject queryObject = new PreparedQueryObject();
queryObject.appendQueryString(
"INSERT INTO " + keyspaceName + "." + tableName + " (name, count) "
+ "VALUES ('"+candidateName+"', "+numVotes+");");
musicCore.atomicPut(keyspaceName, tableName, candidateName, queryObject, null);
}
private void readAllVotes() throws MusicServiceException {
PreparedQueryObject queryObject = new PreparedQueryObject();
queryObject.appendQueryString("SELECT * FROM " + keyspaceName + "." + tableName);
ResultSet rs = musicCore.get(queryObject);
for(Row candidate : rs.all()) {
System.out.println(candidate.getString("name") + " - " + candidate.getVarint("count"));
}
}
public static void main( String[] args ) throws Exception {
VotingAppJar vHandle = new VotingAppJar();
vHandle.vote();
vHandle.readAllVotes();
}
}
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