792f606a64
Contains the cql3 grammer and supporting classes, which will be converted one by one. From commit bf599fb5b062cbcc652da78b7d699e7a01b949ad.
92 lines
3.6 KiB
Java
92 lines
3.6 KiB
Java
/*
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* Licensed to the Apache Software Foundation (ASF) under one
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* or more contributor license agreements. See the NOTICE file
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* distributed with this work for additional information
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* regarding copyright ownership. The ASF licenses this file
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* to you under the Apache License, Version 2.0 (the
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* "License"); you may not use this file except in compliance
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* with the License. You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package org.apache.cassandra.cql3.statements;
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import org.slf4j.Logger;
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import org.slf4j.LoggerFactory;
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import org.apache.cassandra.config.CFMetaData;
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import org.apache.cassandra.config.Schema;
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import org.apache.cassandra.config.TriggerDefinition;
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import org.apache.cassandra.cql3.CFName;
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import org.apache.cassandra.exceptions.ConfigurationException;
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import org.apache.cassandra.exceptions.InvalidRequestException;
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import org.apache.cassandra.exceptions.RequestValidationException;
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import org.apache.cassandra.exceptions.UnauthorizedException;
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import org.apache.cassandra.service.ClientState;
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import org.apache.cassandra.service.MigrationManager;
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import org.apache.cassandra.thrift.ThriftValidation;
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import org.apache.cassandra.transport.Event;
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import org.apache.cassandra.triggers.TriggerExecutor;
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public class CreateTriggerStatement extends SchemaAlteringStatement
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{
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private static final Logger logger = LoggerFactory.getLogger(CreateTriggerStatement.class);
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private final String triggerName;
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private final String triggerClass;
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private final boolean ifNotExists;
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public CreateTriggerStatement(CFName name, String triggerName, String clazz, boolean ifNotExists)
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{
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super(name);
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this.triggerName = triggerName;
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this.triggerClass = clazz;
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this.ifNotExists = ifNotExists;
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}
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public void checkAccess(ClientState state) throws UnauthorizedException
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{
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state.ensureIsSuper("Only superusers are allowed to perform CREATE TRIGGER queries");
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}
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public void validate(ClientState state) throws RequestValidationException
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{
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ThriftValidation.validateColumnFamily(keyspace(), columnFamily());
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try
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{
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TriggerExecutor.instance.loadTriggerInstance(triggerClass);
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}
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catch (Exception e)
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{
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throw new ConfigurationException(String.format("Trigger class '%s' doesn't exist", triggerClass));
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}
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}
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public boolean announceMigration(boolean isLocalOnly) throws ConfigurationException, InvalidRequestException
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{
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CFMetaData cfm = Schema.instance.getCFMetaData(keyspace(), columnFamily()).copy();
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TriggerDefinition triggerDefinition = TriggerDefinition.create(triggerName, triggerClass);
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if (!ifNotExists || !cfm.containsTriggerDefinition(triggerDefinition))
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{
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cfm.addTriggerDefinition(triggerDefinition);
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logger.info("Adding trigger with name {} and class {}", triggerName, triggerClass);
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MigrationManager.announceColumnFamilyUpdate(cfm, false, isLocalOnly);
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return true;
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}
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return false;
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}
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public Event.SchemaChange changeEvent()
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{
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return new Event.SchemaChange(Event.SchemaChange.Change.UPDATED, Event.SchemaChange.Target.TABLE, keyspace(), columnFamily());
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}
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}
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