/**
* Copyright 2012 Comcast Corporation
*
* 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.
*/
package com.comcast.cmb.common.persistence;
import java.util.ArrayList;
import java.util.Collection;
import java.util.HashMap;
import java.util.Iterator;
import java.util.List;
import java.util.Map;
import me.prettyprint.cassandra.connection.DynamicLoadBalancingPolicy;
import me.prettyprint.cassandra.connection.LeastActiveBalancingPolicy;
import me.prettyprint.cassandra.connection.RoundRobinBalancingPolicy;
import me.prettyprint.cassandra.model.IndexedSlicesQuery;
import me.prettyprint.cassandra.model.MultigetCountQuery;
import me.prettyprint.cassandra.serializers.CompositeSerializer;
import me.prettyprint.cassandra.serializers.LongSerializer;
import me.prettyprint.cassandra.serializers.StringSerializer;
import me.prettyprint.cassandra.service.CassandraHostConfigurator;
import me.prettyprint.cassandra.service.OperationType;
import me.prettyprint.hector.api.Cluster;
import me.prettyprint.hector.api.ConsistencyLevelPolicy;
import me.prettyprint.hector.api.HConsistencyLevel;
import me.prettyprint.hector.api.Keyspace;
import me.prettyprint.hector.api.Serializer;
import me.prettyprint.hector.api.beans.ColumnSlice;
import me.prettyprint.hector.api.beans.Composite;
import me.prettyprint.hector.api.beans.HColumn;
import me.prettyprint.hector.api.beans.HCounterColumn;
import me.prettyprint.hector.api.beans.OrderedRows;
import me.prettyprint.hector.api.beans.Row;
import me.prettyprint.hector.api.ddl.KeyspaceDefinition;
import me.prettyprint.hector.api.factory.HFactory;
import me.prettyprint.hector.api.mutation.MutationResult;
import me.prettyprint.hector.api.mutation.Mutator;
import me.prettyprint.hector.api.query.ColumnQuery;
import me.prettyprint.hector.api.query.CounterQuery;
import me.prettyprint.hector.api.query.QueryResult;
import me.prettyprint.hector.api.query.RangeSlicesQuery;
import me.prettyprint.hector.api.query.SliceQuery;
import org.apache.log4j.Logger;
import com.comcast.cmb.common.controller.CMBControllerServlet;
import com.comcast.cmb.common.util.CMBErrorCodes;
import com.comcast.cmb.common.util.CMBProperties;
import com.comcast.cmb.common.util.PersistenceException;
import com.comcast.cmb.common.util.ValueAccumulator.AccumulatorName;
/**
* This class represents generic functionality for all Cassandra persistence objects
* @author aseem, bwolf, vvenkatraman, jorge, baosen, michael
*/
public class CassandraHectorPersistence extends AbstractDurablePersistence {
private static final int hectorPoolSize = CMBProperties.getInstance().getHectorPoolSize();
private static final String hectorBalancingPolicy = CMBProperties.getInstance().getHectorBalancingPolicy();
private static final Map<String, String> credentials = CMBProperties.getInstance().getCassandraCredentials();
private static Cluster cluster;
private static Map<String, Keyspace> keyspaces;
private static Logger logger = Logger.getLogger(CassandraHectorPersistence.class);
private static class SimpleConsistencyPolicy implements ConsistencyLevelPolicy {
private final HConsistencyLevel level;
public SimpleConsistencyPolicy(HConsistencyLevel l) {
level = l;
}
@Override
public HConsistencyLevel get(OperationType arg0, String arg1) {
return level;
}
@Override
public HConsistencyLevel get(OperationType arg0) {
return level;
}
}
private static CassandraHectorPersistence instance;
public static CassandraHectorPersistence getInstance() {
if (instance == null) {
instance = new CassandraHectorPersistence();
}
return instance;
}
private CassandraHectorPersistence() {
initPersistence();
}
private Keyspace getKeyspace(String keyspace) {
return keyspaces.get(keyspace);
}
private void initPersistence() {
long ts1 = System.currentTimeMillis();
logger.info("event=initializing_hector");
CassandraHostConfigurator cassandraHostConfigurator = new CassandraHostConfigurator();
cassandraHostConfigurator.setHosts(CLUSTER_URL);
cassandraHostConfigurator.setMaxActive(hectorPoolSize);
cassandraHostConfigurator.setCassandraThriftSocketTimeout(CMBProperties.getInstance().getCassandraThriftSocketTimeOutMS());
cassandraHostConfigurator.setAutoDiscoverHosts(CMBProperties.getInstance().isHectorAutoDiscovery());
cassandraHostConfigurator.setAutoDiscoveryDelayInSeconds(CMBProperties.getInstance().getHectorAutoDiscoveryDelaySeconds());
String dataCenter = CMBProperties.getInstance().getCassandraDataCenter();
if (dataCenter != null && !dataCenter.equals("")) {
cassandraHostConfigurator.setAutoDiscoveryDataCenter(dataCenter);
}
// some other settings we may be interested in down the road, see here for more details:
// https://github.com/rantav/hector/wiki/User-Guide
if (hectorBalancingPolicy != null) {
if (hectorBalancingPolicy.equals("LeastActiveBalancingPolicy")) {
cassandraHostConfigurator.setLoadBalancingPolicy(new LeastActiveBalancingPolicy());
} else if (hectorBalancingPolicy.equals("RoundRobinBalancingPolicy")) {
cassandraHostConfigurator.setLoadBalancingPolicy(new RoundRobinBalancingPolicy()); //default
} else if (hectorBalancingPolicy.equals("DynamicLoadBalancingPolicy")) {
cassandraHostConfigurator.setLoadBalancingPolicy(new DynamicLoadBalancingPolicy());
}
}
//cassandraHostConfigurator.setExhaustedPolicy(ExhaustedPolicy.WHEN_EXHAUSTED_GROW);
cluster = HFactory.getOrCreateCluster(AbstractDurablePersistence.CLUSTER_NAME, cassandraHostConfigurator, credentials);
keyspaces = new HashMap<String, Keyspace>();
List<String> keyspaceNames = new ArrayList<String>();
keyspaceNames.add(CMBProperties.getInstance().getCMBKeyspace());
keyspaceNames.add(CMBProperties.getInstance().getCNSKeyspace());
keyspaceNames.add(CMBProperties.getInstance().getCQSKeyspace());
// for now back to one consistency level for everything
for (String k : keyspaceNames) {
Keyspace keyspace = HFactory.createKeyspace(k, cluster, new SimpleConsistencyPolicy(HConsistencyLevel.valueOf(CMBProperties.getInstance().getWriteConsistencyLevel())));
keyspaces.put(k, keyspace);
}
long ts2 = System.currentTimeMillis();
CMBControllerServlet.valueAccumulator.addToCounter(AccumulatorName.CassandraTime, (ts2 - ts1));
}
private static Serializer getSerializer(CmbSerializer s) throws PersistenceException {
if (s instanceof CmbStringSerializer) {
return StringSerializer.get();
} else if (s instanceof CmbCompositeSerializer) {
return CompositeSerializer.get();
} else if (s instanceof CmbLongSerializer) {
return LongSerializer.get();
}
throw new PersistenceException(CMBErrorCodes.InternalError, "Unknown serializer " + s);
}
private static Object getComposite(Object o) {
if (o == null) {
return null;
}
if (o instanceof CmbHectorComposite) {
return ((CmbHectorComposite)o).getComposite();
}
return o;
}
private static Collection<Object> getComposites(Collection l) {
Collection<Object> r = new ArrayList<Object>();
if (l == null) {
return null;
}
for (Object o : l) {
r.add(getComposite(o));
}
return r;
}
private static Object getCmbComposite(Object o) {
if (o == null) {
return null;
}
if (o instanceof Composite) {
return new CmbHectorComposite((Composite)o);
}
return o;
}
@Override
public CmbComposite getCmbComposite(List<?> l) {
return new CmbHectorComposite(l);
}
@Override
public CmbComposite getCmbComposite(Object... os) {
return new CmbHectorComposite(os);
}
public static class CmbHectorComposite extends CmbComposite {
private final Composite composite;
public CmbHectorComposite(List<?> l) {
composite = new Composite(l);
}
public CmbHectorComposite(Object... os) {
composite = new Composite(os);
}
public CmbHectorComposite(Composite composite) {
this.composite = composite;
}
public Composite getComposite() {
return composite;
}
@Override
public Object get(int i) {
return composite.get(i);
}
@Override
public String toString() {
return composite.toString();
}
@Override
public int compareTo(CmbComposite c) {
return this.composite.compareTo(((CmbHectorComposite)c).getComposite());
}
@Override
public boolean equals(Object o) {
if (!(o instanceof CmbHectorComposite)) {
return false;
}
return this.composite.equals(((CmbHectorComposite)o).getComposite());
}
}
public static class CmbHectorColumn<N, V> extends CmbColumn<N, V> {
private HColumn<N, V> hectorColumn;
public CmbHectorColumn(HColumn<N, V> hectorColumn) {
this.hectorColumn = hectorColumn;
}
@Override
public N getName() {
return (N)getCmbComposite(hectorColumn.getName());
}
@Override
public V getValue() {
return hectorColumn.getValue();
}
@Override
public long getClock() {
return hectorColumn.getClock();
}
}
public static class CmbHectorRow<K, N, V> extends CmbRow<K, N, V> {
private Row<K, N, V> row;
public CmbHectorRow(Row<K, N, V> row) {
this.row = row;
}
@Override
public K getKey() {
return row.getKey();
}
@Override
public CmbColumnSlice<N, V> getColumnSlice() {
return new CmbHectorColumnSlice<N, V>(row.getColumnSlice());
}
}
public static class CmbHectorColumnSlice<N, V> extends CmbColumnSlice<N, V> {
private ColumnSlice<N, V> hectorSlice;
private List<CmbColumn<N, V>> columns = null;
public CmbHectorColumnSlice(ColumnSlice<N, V> hectorSlice) {
this.hectorSlice = hectorSlice;
}
@Override
public CmbHectorColumn<N, V> getColumnByName(N name) {
if (hectorSlice.getColumnByName(name) != null) {
return new CmbHectorColumn<N, V>(hectorSlice.getColumnByName(name));
} else {
return null;
}
}
private void loadColumns() {
if (columns == null) {
columns = new ArrayList<CmbColumn<N, V>>();
for (HColumn<N, V> c : hectorSlice.getColumns()) {
columns.add(new CmbHectorColumn<N, V>(c));
}
}
}
@Override
public List<CmbColumn<N, V>> getColumns() {
loadColumns();
return columns;
}
@Override
public int size() {
loadColumns();
return columns.size();
}
}
private <K, N, V> List<CmbRow<K, N, V>> getRows(List<Row<K, N, V>> rows) throws PersistenceException {
List<CmbRow<K, N, V>> l = new ArrayList<CmbRow<K, N, V>>();
for (Row<K, N, V> r : rows) {
l.add(new CmbHectorRow<K, N, V>(r));
}
return l;
}
@Override
public boolean isAlive() {
boolean alive = true;
List<KeyspaceDefinition> keyspaces = cluster.describeKeyspaces();
List<String> names = new ArrayList<String>();
for (KeyspaceDefinition k : keyspaces) {
names.add(k.getName());
}
alive &= names.contains(CMBProperties.getInstance().getCQSKeyspace());
alive &= names.contains(CMBProperties.getInstance().getCNSKeyspace());
alive &= names.contains(CMBProperties.getInstance().getCMBKeyspace());
return alive;
}
@Override
public <K, N, V> void update(String keyspace, String columnFamily, K key, N column, V value,
CmbSerializer keySerializer, CmbSerializer nameSerializer, CmbSerializer valueSerializer, Integer ttl) throws PersistenceException {
long ts1 = System.currentTimeMillis();
logger.debug("event=update column_family=" + columnFamily + " key=" + key + " column=" + column + " value=" + value);
Mutator<K> mutator = HFactory.createMutator(getKeyspace(keyspace), getSerializer(keySerializer));
HColumn c = HFactory.createColumn(getComposite(column), value, getSerializer(nameSerializer), getSerializer(valueSerializer));
if (ttl != null) {
c.setTtl(ttl);
}
mutator.addInsertion(key, columnFamily, c);
mutator.execute();
long ts2 = System.currentTimeMillis();
CMBControllerServlet.valueAccumulator.addToCounter(AccumulatorName.CassandraTime, (ts2 - ts1));
CMBControllerServlet.valueAccumulator.addToCounter(AccumulatorName.CassandraWrite, 1L);
}
@Override
public <K, N, V> List<CmbRow<K, N, V>> readAllRows(String keyspace, String columnFamily, int numRows, int numCols, CmbSerializer keySerializer,
CmbSerializer columnNameSerializer, CmbSerializer valueSerializer) throws PersistenceException {
long ts1 = System.currentTimeMillis();
logger.debug("event=read_nextn_nonempty_rows cf=" + columnFamily + " num_rows=" + numRows + " num_cols" + numCols);
try {
RangeSlicesQuery rangeSlicesQuery = HFactory.createRangeSlicesQuery(getKeyspace(keyspace), getSerializer(keySerializer),
getSerializer(columnNameSerializer), getSerializer(valueSerializer))
.setColumnFamily(columnFamily)
.setRange(null, null, false, numCols).setRowCount(numRows);
//.setKeys(lastKey, null);
QueryResult<OrderedRows<K, N, V>> result = rangeSlicesQuery.execute();
OrderedRows<K, N, V> orderedRows = result.get();
List<Row<K, N, V>> rows = orderedRows.getList();
return getRows(rows);
} finally {
long ts2 = System.currentTimeMillis();
CMBControllerServlet.valueAccumulator.addToCounter(AccumulatorName.CassandraRead, 1L);
CMBControllerServlet.valueAccumulator.addToCounter(AccumulatorName.CassandraTime, (ts2 - ts1));
}
}
@Override
public <K, N, V> List<CmbRow<K, N, V>> readRowsByIndex(String keyspace, String columnFamily, N whereColumn, V whereValue,
int numRows, int numCols, CmbSerializer keySerializer,
CmbSerializer columnNameSerializer, CmbSerializer valueSerializer) throws PersistenceException {
Map<N, V> columnValues = new HashMap<N, V>();
columnValues.put(whereColumn, whereValue);
return readRowsByIndices(keyspace, columnFamily, columnValues, numRows, numCols, keySerializer, columnNameSerializer, valueSerializer);
}
@Override
public <K, N, V> List<CmbRow<K, N, V>> readRowsByIndices(String keyspace, String columnFamily, Map<N, V> columnValues,
int numRows, int numCols, CmbSerializer keySerializer,
CmbSerializer columnNameSerializer, CmbSerializer valueSerializer) throws PersistenceException {
long ts1 = System.currentTimeMillis();
logger.debug("event=read_nextn_rows cf=" + columnFamily + " num_rows=" + numRows + " num_cols=" + numCols + " values=" + columnValues);
try {
List<Row<K, N, V>> rows = new ArrayList<Row<K, N, V>>();
IndexedSlicesQuery<K, N, V> indexedSlicesQuery = HFactory.createIndexedSlicesQuery(getKeyspace(keyspace), getSerializer(keySerializer), getSerializer(columnNameSerializer), getSerializer(valueSerializer))
.setColumnFamily(columnFamily)
.setRange(null, null, false, numCols).setRowCount(numRows);
for (N name : columnValues.keySet()) {
indexedSlicesQuery.addEqualsExpression(name, columnValues.get(name));
}
QueryResult<OrderedRows<K, N, V>> result = indexedSlicesQuery.execute();
CMBControllerServlet.valueAccumulator.addToCounter(AccumulatorName.CassandraRead, 1L);
OrderedRows<K, N, V> orderedRows = result.get();
Iterator<Row<K, N, V>> rowsIterator = orderedRows.iterator();
while (rowsIterator.hasNext()) {
Row<K, N, V> row = rowsIterator.next();
if (row.getColumnSlice().getColumns().isEmpty()) {
continue;
}
rows.add(row);
}
return getRows(rows);
} finally {
long ts2 = System.currentTimeMillis();
CMBControllerServlet.valueAccumulator.addToCounter(AccumulatorName.CassandraTime, (ts2 - ts1));
}
}
@Override
public <K, N, V> CmbColumnSlice<N, V> readColumnSlice(String keyspace, String columnFamily, K key, N firstColumnName, N lastColumnName,
int numCols, CmbSerializer keySerializer,
CmbSerializer columnNameSerializer, CmbSerializer valueSerializer) throws PersistenceException {
long ts1 = System.currentTimeMillis();
logger.debug("event=read_row cf=" + columnFamily + " key=" + key + " first_col=" + firstColumnName + " last_col=" + lastColumnName + " num_cols=" + numCols);
try {
SliceQuery<K, N, V> sliceQuery = HFactory.createSliceQuery(getKeyspace(keyspace), getSerializer(keySerializer), getSerializer(columnNameSerializer), getSerializer(valueSerializer))
.setColumnFamily(columnFamily)
.setRange(getComposite(firstColumnName), getComposite(lastColumnName), false, numCols)
.setKey(key);
QueryResult<ColumnSlice<N, V>> result = sliceQuery.execute();
ColumnSlice<N, V> slice = result.get();
if (slice == null || slice.getColumns() == null || slice.getColumns().isEmpty()) {
return null;
}
return new CmbHectorColumnSlice<N, V>(slice);
} finally {
long ts2 = System.currentTimeMillis();
CMBControllerServlet.valueAccumulator.addToCounter(AccumulatorName.CassandraRead, 1L);
CMBControllerServlet.valueAccumulator.addToCounter(AccumulatorName.CassandraTime, (ts2 - ts1));
}
}
@Override
public <K, N, V> CmbColumn<N, V> readColumn(String keyspace, String columnFamily, K key, N columnName, CmbSerializer keySerializer,
CmbSerializer columnNameSerializer, CmbSerializer valueSerializer) throws PersistenceException {
long ts1 = System.currentTimeMillis();
logger.debug("event=read_row cf=" + columnFamily + " key=" + key + " col=" + columnName);
try {
ColumnQuery<K, N, V> columnQuery = HFactory.createColumnQuery(getKeyspace(keyspace), getSerializer(keySerializer), getSerializer(columnNameSerializer), getSerializer(valueSerializer))
.setColumnFamily(columnFamily)
.setKey(key)
.setName(getComposite(columnName));
QueryResult<HColumn<N, V>> result = columnQuery.execute();
if (result.get() == null) {
return null;
}
return new CmbHectorColumn<N, V>(result.get());
} finally {
long ts2 = System.currentTimeMillis();
CMBControllerServlet.valueAccumulator.addToCounter(AccumulatorName.CassandraRead, 1L);
CMBControllerServlet.valueAccumulator.addToCounter(AccumulatorName.CassandraTime, (ts2 - ts1));
}
}
@Override
public <K, N, V> void insertRow(String keyspace, K rowKey,
String columnFamily, Map<N, V> columnValues,
CmbSerializer keySerializer, CmbSerializer nameSerializer,
CmbSerializer valueSerializer, Integer ttl) throws PersistenceException {
long ts1 = System.currentTimeMillis();
logger.debug("event=insert_row key=" + rowKey + " cf=" + columnFamily + " ttl=" + (ttl == null ? "null" : ttl));
try {
Mutator<K> mutator = HFactory.createMutator(getKeyspace(keyspace), getSerializer(keySerializer));
for (N name : columnValues.keySet()) {
HColumn<N, V> col = HFactory.createColumn(getComposite(name), columnValues.get(name), getSerializer(nameSerializer), getSerializer(valueSerializer));
if (ttl != null) {
col.setTtl(ttl);
}
mutator.addInsertion(rowKey, columnFamily, col);
}
MutationResult result = mutator.execute();
} finally {
CMBControllerServlet.valueAccumulator.addToCounter(AccumulatorName.CassandraWrite, 1L);
long ts2 = System.currentTimeMillis();
CMBControllerServlet.valueAccumulator.addToCounter(AccumulatorName.CassandraTime, (ts2 - ts1));
}
}
@Override
public <K, N, V> void insertRows(String keyspace, Map<K, Map<N, V>> rowColumnValues, String columnFamily,
CmbSerializer keySerializer, CmbSerializer nameSerializer,
CmbSerializer valueSerializer, Integer ttl) throws PersistenceException {
long ts1 = System.currentTimeMillis();
logger.debug("event=insert_rows row_column_values=" + rowColumnValues + " cf=" + columnFamily + " ttl=" + (ttl == null ? "null" : ttl));
try {
Mutator<K> mutator = HFactory.createMutator(getKeyspace(keyspace), getSerializer(keySerializer));
for (K rowKey : rowColumnValues.keySet()) {
Map<N, V> columnValues = rowColumnValues.get(rowKey);
for (N name : columnValues.keySet()) {
HColumn<N, V> col = HFactory.createColumn(getComposite(name), columnValues.get(name), getSerializer(nameSerializer), getSerializer(valueSerializer));
if (ttl != null) {
col.setTtl(ttl);
}
mutator.addInsertion(rowKey, columnFamily, col);
}
}
MutationResult result = mutator.execute();
} finally {
CMBControllerServlet.valueAccumulator.addToCounter(AccumulatorName.CassandraWrite, 1L);
long ts2 = System.currentTimeMillis();
CMBControllerServlet.valueAccumulator.addToCounter(AccumulatorName.CassandraTime, (ts2 - ts1));
}
}
@Override
public <K, N> void delete(String keyspace, String columnFamily, K key, N column,
CmbSerializer keySerializer, CmbSerializer columnSerializer) throws PersistenceException {
long ts1 = System.currentTimeMillis();
logger.debug("event=delete key=" + key + " column=" + column + " cf=" + columnFamily);
try {
Mutator<K> mutator = HFactory.createMutator(getKeyspace(keyspace), getSerializer(keySerializer));
if (column != null) {
mutator.addDeletion(key, columnFamily, getComposite(column), getSerializer(columnSerializer));
} else {
mutator.addDeletion(key, columnFamily);
}
mutator.execute();
} finally {
CMBControllerServlet.valueAccumulator.addToCounter(AccumulatorName.CassandraWrite, 1L);
long ts2 = System.currentTimeMillis();
CMBControllerServlet.valueAccumulator.addToCounter(AccumulatorName.CassandraTime, (ts2 - ts1));
}
}
@Override
public <K, N> void deleteBatch(String keyspace, String columnFamily,
List<K> keyList, List<N> columnList, CmbSerializer keySerializer,
CmbSerializer columnSerializer) throws PersistenceException {
long ts1 = System.currentTimeMillis();
logger.debug("event=delete_batch key_count=" + keyList.size() + " cf=" + columnFamily);
try {
Mutator<K> mutator = HFactory.createMutator(getKeyspace(keyspace), getSerializer(keySerializer));
if (columnList==null ||columnList.isEmpty()) {
for (int i=0; i< keyList.size();i++) {
mutator.addDeletion(keyList.get(i), columnFamily);
}
} else {
for (int i=0; i< keyList.size();i++) {
mutator.addDeletion(keyList.get(i), columnFamily, getComposite(columnList.get(i)), getSerializer(columnSerializer));
}
}
mutator.execute();
} finally {
CMBControllerServlet.valueAccumulator.addToCounter(AccumulatorName.CassandraWrite, 1L);
long ts2 = System.currentTimeMillis();
CMBControllerServlet.valueAccumulator.addToCounter(AccumulatorName.CassandraTime, (ts2 - ts1));
}
}
@Override
public <K, N> int getCount(String keyspace, String columnFamily, K key,
CmbSerializer keySerializer, CmbSerializer columnNameSerializer) throws PersistenceException {
long ts1 = System.currentTimeMillis();
logger.debug("event=get_count cf=" + columnFamily + " key=" + key);
try {
MultigetCountQuery<K, N> query = new MultigetCountQuery<K, N>(getKeyspace(keyspace), getSerializer(keySerializer), getSerializer(columnNameSerializer))
.setColumnFamily(columnFamily).setKeys(key)
.setRange(null, null, 2000000000);
QueryResult<Map<K, Integer>> result = query.execute();
CMBControllerServlet.valueAccumulator.addToCounter(AccumulatorName.CassandraRead, 1L);
Map<K, Integer> resultRow = result.get();
if (resultRow.containsKey(key)) {
int count = resultRow.get(key);
return count;
}
return -1;
} finally {
long ts2 = System.currentTimeMillis();
CMBControllerServlet.valueAccumulator.addToCounter(AccumulatorName.CassandraTime, (ts2 - ts1));
}
}
@Override
public <K, N> void incrementCounter(String keyspace, String columnFamily, K rowKey,
String columnName, int incrementBy, CmbSerializer keySerializer,
CmbSerializer columnNameSerializer) throws PersistenceException {
long ts1 = System.currentTimeMillis();
logger.debug("event=increment_counter cf=" + columnFamily + " key=" + rowKey + " column=" + columnName + " inc=" + incrementBy);
try {
Mutator<K> mutator = HFactory.createMutator(getKeyspace(keyspace), getSerializer(keySerializer));
mutator.incrementCounter(rowKey, columnFamily, columnName, incrementBy);
mutator.execute();
} finally {
CMBControllerServlet.valueAccumulator.addToCounter(AccumulatorName.CassandraWrite, 1L);
long ts2 = System.currentTimeMillis();
CMBControllerServlet.valueAccumulator.addToCounter(AccumulatorName.CassandraTime, (ts2 - ts1));
}
}
@Override
public <K, N> void decrementCounter(String keyspace, String columnFamily, K rowKey,
String columnName, int decrementBy, CmbSerializer keySerializer,
CmbSerializer columnNameSerializer) throws PersistenceException {
long ts1 = System.currentTimeMillis();
logger.debug("event=decrement_counter cf=" + columnFamily + " key=" + rowKey + " column=" + columnName + " dec=" + decrementBy);
try {
Mutator<K> mutator = HFactory.createMutator(getKeyspace(keyspace), getSerializer(keySerializer));
mutator.decrementCounter(rowKey, columnFamily, columnName, decrementBy);
mutator.execute();
} finally {
CMBControllerServlet.valueAccumulator.addToCounter(AccumulatorName.CassandraWrite, 1L);
long ts2 = System.currentTimeMillis();
CMBControllerServlet.valueAccumulator.addToCounter(AccumulatorName.CassandraTime, (ts2 - ts1));
}
}
/*@Override
public <K, N> void deleteCounter(String keyspace, String columnFamily, K rowKey,
N columnName, CmbSerializer keySerializer,
CmbSerializer columnNameSerializer) throws PersistenceException {
long ts1 = System.currentTimeMillis();
logger.debug("event=decrement_counter cf=" + columnFamily + " key=" + rowKey + " column=" + columnName);
try {
Mutator<K> mutator = HFactory.createMutator(getKeyspace(keyspace), getSerializer(keySerializer));
mutator.deleteCounter(rowKey, columnFamily, columnName, getSerializer(columnNameSerializer));
mutator.execute();
} finally {
CMBControllerServlet.valueAccumulator.addToCounter(AccumulatorName.CassandraWrite, 1L);
long ts2 = System.currentTimeMillis();
CMBControllerServlet.valueAccumulator.addToCounter(AccumulatorName.CassandraTime, (ts2 - ts1));
}
}*/
@Override
public <K, N> long getCounter(String keyspace, String columnFamily, K rowKey,
N columnName, CmbSerializer keySerializer,
CmbSerializer columnNameSerializer) throws PersistenceException {
long ts1 = System.currentTimeMillis();
logger.debug("event=get_counter cf=" + columnFamily + " key=" + rowKey + " column=" + columnName);
try {
CounterQuery<K, N> countQuery = HFactory.createCounterColumnQuery(getKeyspace(keyspace), getSerializer(keySerializer), getSerializer(columnNameSerializer));
countQuery.setColumnFamily(columnFamily).setKey(rowKey).setName(columnName);
QueryResult<HCounterColumn<N>> result = countQuery.execute();
CMBControllerServlet.valueAccumulator.addToCounter(AccumulatorName.CassandraRead, 1L);
if (result.get() == null) {
return 0;
}
return result.get().getValue();
} finally {
long ts2 = System.currentTimeMillis();
CMBControllerServlet.valueAccumulator.addToCounter(AccumulatorName.CassandraTime, (ts2 - ts1));
}
}
}