/* * 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 org.slf4j.Logger; import org.slf4j.LoggerFactory; import org.apache.cassandra.config.CFMetaData; import org.apache.cassandra.config.Schema; import org.apache.cassandra.config.TriggerDefinition; import org.apache.cassandra.cql3.CFName; import org.apache.cassandra.exceptions.ConfigurationException; import org.apache.cassandra.exceptions.RequestValidationException; import org.apache.cassandra.exceptions.UnauthorizedException; import org.apache.cassandra.service.ClientState; import org.apache.cassandra.service.MigrationManager; import org.apache.cassandra.thrift.ThriftValidation; import org.apache.cassandra.transport.messages.ResultMessage; import org.apache.cassandra.triggers.TriggerExecutor; public class CreateTriggerStatement extends SchemaAlteringStatement { private static final Logger logger = LoggerFactory.getLogger(CreateTriggerStatement.class); private final String triggerName; private final String triggerClass; public CreateTriggerStatement(CFName name, String triggerName, String clazz) { super(name); this.triggerName = triggerName; this.triggerClass = clazz; } public void checkAccess(ClientState state) throws UnauthorizedException { state.ensureIsSuper("Only superusers are allowed to perfrom CREATE TRIGGER queries"); } public void validate(ClientState state) throws RequestValidationException { ThriftValidation.validateColumnFamily(keyspace(), columnFamily()); try { TriggerExecutor.instance.loadTriggerInstance(triggerClass); } catch (Exception e) { throw new ConfigurationException(String.format("Trigger class '%s' doesn't exist", triggerClass)); } } public void announceMigration() throws ConfigurationException { CFMetaData cfm = Schema.instance.getCFMetaData(keyspace(), columnFamily()).clone(); cfm.addTriggerDefinition(TriggerDefinition.create(triggerName, triggerClass)); logger.info("Adding trigger with name {} and class {}", triggerName, triggerClass); MigrationManager.announceColumnFamilyUpdate(cfm, false); } public ResultMessage.SchemaChange.Change changeType() { return ResultMessage.SchemaChange.Change.UPDATED; } }