/*
* 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.cql3.statements;
import java.nio.ByteBuffer;
import java.util.*;
import org.apache.cassandra.auth.Permission;
import org.apache.cassandra.cql3.*;
import org.apache.cassandra.db.ConsistencyLevel;
import org.apache.cassandra.db.CounterMutation;
import org.apache.cassandra.db.IMutation;
import org.apache.cassandra.db.RowMutation;
import org.apache.cassandra.exceptions.*;
import org.apache.cassandra.service.ClientState;
import org.apache.cassandra.utils.Pair;
/**
* A <code>BATCH</code> statement parsed from a CQL query.
*
*/
public class BatchStatement extends ModificationStatement
{
// statements to execute
protected final List<ModificationStatement> statements;
/**
* Creates a new BatchStatement from a list of statements and a
* Thrift consistency level.
*
* @param type type of the batch
* @param statements a list of UpdateStatements
* @param attrs additional attributes for statement (CL, timestamp, timeToLive)
*/
public BatchStatement(Type type, List<ModificationStatement> statements, Attributes attrs)
{
super(null, attrs);
this.type = type;
this.statements = statements;
}
@Override
public void prepareKeyspace(ClientState state) throws InvalidRequestException
{
for (ModificationStatement statement : statements)
statement.prepareKeyspace(state);
}
@Override
public void checkAccess(ClientState state) throws InvalidRequestException, UnauthorizedException
{
Set<String> cfamsSeen = new HashSet<String>();
for (ModificationStatement statement : statements)
{
// Avoid unnecessary authorizations.
if (!(cfamsSeen.contains(statement.columnFamily())))
{
state.hasColumnFamilyAccess(statement.keyspace(), statement.columnFamily(), Permission.UPDATE);
cfamsSeen.add(statement.columnFamily());
}
}
}
public void validate(ClientState state) throws InvalidRequestException
{
if (getTimeToLive() != 0)
throw new InvalidRequestException("Global TTL on the BATCH statement is not supported.");
for (ModificationStatement statement : statements)
{
if (isSetTimestamp() && statement.isSetTimestamp())
throw new InvalidRequestException("Timestamp must be set either on BATCH or individual statements");
if (statement.getTimeToLive() < 0)
throw new InvalidRequestException("A TTL must be greater or equal to 0");
}
}
protected void validateConsistency(ConsistencyLevel cl) throws InvalidRequestException
{
for (ModificationStatement statement : statements)
statement.validateConsistency(cl);
}
public Collection<? extends IMutation> getMutations(List<ByteBuffer> variables, boolean local, ConsistencyLevel cl, long now)
throws RequestExecutionException, RequestValidationException
{
Map<Pair<String, ByteBuffer>, IMutation> mutations = new HashMap<Pair<String, ByteBuffer>, IMutation>();
for (ModificationStatement statement : statements)
{
if (isSetTimestamp())
statement.setTimestamp(getTimestamp(now));
// Group mutation together, otherwise they won't get applied atomically
for (IMutation m : statement.getMutations(variables, local, cl, now))
{
if (m instanceof CounterMutation && type != Type.COUNTER)
throw new InvalidRequestException("Counter mutations are only allowed in COUNTER batches");
if (m instanceof RowMutation && type == Type.COUNTER)
throw new InvalidRequestException("Only counter mutations are allowed in COUNTER batches");
Pair<String, ByteBuffer> key = Pair.create(m.getTable(), m.key());
IMutation existing = mutations.get(key);
if (existing == null)
mutations.put(key, m);
else
existing.addAll(m);
}
}
return mutations.values();
}
public ParsedStatement.Prepared prepare(CFDefinition.Name[] boundNames) throws InvalidRequestException
{
// XXX: we use our knowledge that Modification don't create new statement upon call to prepare()
for (ModificationStatement statement : statements)
{
statement.prepare(boundNames);
}
return new ParsedStatement.Prepared(this, Arrays.<ColumnSpecification>asList(boundNames));
}
public ParsedStatement.Prepared prepare() throws InvalidRequestException
{
CFDefinition.Name[] boundNames = new CFDefinition.Name[getBoundsTerms()];
return prepare(boundNames);
}
public String toString()
{
return String.format("BatchStatement(type=%s, statements=%s)", type, statements);
}
}