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The Apache Cassandra Project develops a highly scalable second-generation distributed database, bringing together Dynamo's fully distributed design and Bigtable's ColumnFamily-based data model.
/*
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you 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 org.apache.cassandra.cql;
import java.nio.ByteBuffer;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.Set;
import org.apache.cassandra.cache.CachingOptions;
import org.apache.cassandra.config.CFMetaData;
import org.apache.cassandra.config.ColumnDefinition;
import org.apache.cassandra.db.composites.CellNames;
import org.apache.cassandra.db.ColumnFamilyType;
import org.apache.cassandra.db.marshal.AbstractType;
import org.apache.cassandra.db.marshal.TypeParser;
import org.apache.cassandra.exceptions.ConfigurationException;
import org.apache.cassandra.exceptions.InvalidRequestException;
import org.apache.cassandra.exceptions.SyntaxException;
import org.apache.cassandra.utils.ByteBufferUtil;
import org.apache.cassandra.io.compress.CompressionParameters;
/** A CREATE COLUMNFAMILY parsed from a CQL query statement. */
public class CreateColumnFamilyStatement
{
private final String name;
private final Map columns = new HashMap();
private final List keyValidator = new ArrayList();
private ByteBuffer keyAlias = null;
private final CFPropDefs cfProps = new CFPropDefs();
public CreateColumnFamilyStatement(String name)
{
this.name = name;
}
/** Perform validation of parsed params */
private void validate(List variables) throws InvalidRequestException
{
// Ensure that exactly one key has been specified.
if (keyValidator.size() < 1)
throw new InvalidRequestException("You must specify a PRIMARY KEY");
else if (keyValidator.size() > 1)
throw new InvalidRequestException("You may only specify one PRIMARY KEY");
AbstractType comparator;
try
{
cfProps.validate();
comparator = cfProps.getComparator();
}
catch (ConfigurationException e)
{
throw new InvalidRequestException(e.toString());
}
catch (SyntaxException e)
{
throw new InvalidRequestException(e.toString());
}
for (Map.Entry column : columns.entrySet())
{
ByteBuffer name = column.getKey().getByteBuffer(comparator, variables);
if (keyAlias != null && keyAlias.equals(name))
throw new InvalidRequestException("Invalid column name: "
+ column.getKey().getText()
+ ", because it equals to the key_alias.");
}
}
/** Map a column name to a validator for its value */
public void addColumn(Term term, String comparator)
{
columns.put(term, comparator);
}
public void setKeyType(String validator)
{
keyValidator.add(validator);
}
public String getKeyType()
{
return keyValidator.get(0);
}
public void setKeyAlias(String alias)
{
// if we got KEY in input we don't need to set an alias
if (!alias.toUpperCase().equals("KEY"))
keyAlias = ByteBufferUtil.bytes(alias);
}
/** Map a keyword to the corresponding value */
public void addProperty(String name, String value)
{
cfProps.addProperty(name, value);
}
/** Name of the column family to create */
public String getName()
{
return name;
}
// Column definitions
private List getColumns(CFMetaData cfm) throws InvalidRequestException
{
List columnDefs = new ArrayList<>(columns.size());
for (Map.Entry col : columns.entrySet())
{
try
{
ByteBuffer columnName = cfm.comparator.asAbstractType().fromStringCQL2(col.getKey().getText());
String validatorClassName = CFPropDefs.comparators.containsKey(col.getValue())
? CFPropDefs.comparators.get(col.getValue())
: col.getValue();
AbstractType validator = TypeParser.parse(validatorClassName);
columnDefs.add(ColumnDefinition.regularDef(cfm, columnName, validator, null));
}
catch (ConfigurationException e)
{
InvalidRequestException ex = new InvalidRequestException(e.toString());
ex.initCause(e);
throw ex;
}
catch (SyntaxException e)
{
InvalidRequestException ex = new InvalidRequestException(e.toString());
ex.initCause(e);
throw ex;
}
}
return columnDefs;
}
/**
* Returns a CFMetaData instance based on the parameters parsed from this
* CREATE statement, or defaults where applicable.
*
* @param keyspace keyspace to apply this column family to
* @return a CFMetaData instance corresponding to the values parsed from this statement
* @throws InvalidRequestException on failure to validate parsed parameters
*/
public CFMetaData getCFMetaData(String keyspace, List variables) throws InvalidRequestException
{
validate(variables);
try
{
boolean isDense = columns.isEmpty();
CFMetaData newCFMD = new CFMetaData(keyspace,
name,
ColumnFamilyType.Standard,
CellNames.fromAbstractType(cfProps.getComparator(), isDense));
if (CFMetaData.DEFAULT_COMPRESSOR != null && cfProps.compressionParameters.isEmpty())
cfProps.compressionParameters.put(CompressionParameters.SSTABLE_COMPRESSION, CFMetaData.DEFAULT_COMPRESSOR);
int maxCompactionThreshold = getPropertyInt(CFPropDefs.KW_MAXCOMPACTIONTHRESHOLD, CFMetaData.DEFAULT_MAX_COMPACTION_THRESHOLD);
int minCompactionThreshold = getPropertyInt(CFPropDefs.KW_MINCOMPACTIONTHRESHOLD, CFMetaData.DEFAULT_MIN_COMPACTION_THRESHOLD);
if (minCompactionThreshold <= 0 || maxCompactionThreshold <= 0)
throw new ConfigurationException("Disabling compaction by setting compaction thresholds to 0 has been deprecated, set the compaction option 'enabled' to false instead.");
newCFMD.isDense(isDense)
.addAllColumnDefinitions(getColumns(newCFMD))
.comment(cfProps.getProperty(CFPropDefs.KW_COMMENT))
.readRepairChance(getPropertyDouble(CFPropDefs.KW_READREPAIRCHANCE, CFMetaData.DEFAULT_READ_REPAIR_CHANCE))
.dcLocalReadRepairChance(getPropertyDouble(CFPropDefs.KW_DCLOCALREADREPAIRCHANCE, CFMetaData.DEFAULT_DCLOCAL_READ_REPAIR_CHANCE))
.gcGraceSeconds(getPropertyInt(CFPropDefs.KW_GCGRACESECONDS, CFMetaData.DEFAULT_GC_GRACE_SECONDS))
.defaultValidator(cfProps.getValidator())
.minCompactionThreshold(minCompactionThreshold)
.maxCompactionThreshold(maxCompactionThreshold)
.keyValidator(TypeParser.parse(CFPropDefs.comparators.get(getKeyType())))
.compactionStrategyClass(cfProps.compactionStrategyClass)
.compactionStrategyOptions(cfProps.compactionStrategyOptions)
.compressionParameters(CompressionParameters.create(cfProps.compressionParameters))
.caching(CachingOptions.fromString(getPropertyString(CFPropDefs.KW_CACHING, CFMetaData.DEFAULT_CACHING_STRATEGY.toString())))
.speculativeRetry(CFMetaData.SpeculativeRetry.fromString(getPropertyString(CFPropDefs.KW_SPECULATIVE_RETRY, CFMetaData.DEFAULT_SPECULATIVE_RETRY.toString())))
.bloomFilterFpChance(getPropertyDouble(CFPropDefs.KW_BF_FP_CHANCE, null))
.memtableFlushPeriod(getPropertyInt(CFPropDefs.KW_MEMTABLE_FLUSH_PERIOD, 0))
.defaultTimeToLive(getPropertyInt(CFPropDefs.KW_DEFAULT_TIME_TO_LIVE, CFMetaData.DEFAULT_DEFAULT_TIME_TO_LIVE));
// CQL2 can have null keyAliases
if (keyAlias != null)
newCFMD.addColumnDefinition(ColumnDefinition.partitionKeyDef(newCFMD, keyAlias, newCFMD.getKeyValidator(), null));
return newCFMD.rebuild();
}
catch (ConfigurationException | SyntaxException e)
{
throw new InvalidRequestException(e.toString());
}
}
private String getPropertyString(String key, String defaultValue)
{
return cfProps.getPropertyString(key, defaultValue);
}
private Boolean getPropertyBoolean(String key, Boolean defaultValue)
{
return cfProps.getPropertyBoolean(key, defaultValue);
}
private Double getPropertyDouble(String key, Double defaultValue) throws InvalidRequestException
{
return cfProps.getPropertyDouble(key, defaultValue);
}
private Integer getPropertyInt(String key, Integer defaultValue) throws InvalidRequestException
{
return cfProps.getPropertyInt(key, defaultValue);
}
private Set getPropertySet(String key, Set defaultValue)
{
return cfProps.getPropertySet(key, defaultValue);
}
public Map getColumns()
{
return columns;
}
}
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