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* 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.config;
import static org.apache.cassandra.cql3.QueryProcessor.processInternal;
import java.util.ArrayList;
import java.util.Collection;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.Map.Entry;
import org.apache.cassandra.cql3.ColumnNameBuilder;
import org.apache.cassandra.cql3.UntypedResultSet;
import org.apache.cassandra.cql3.UntypedResultSet.Row;
import org.apache.cassandra.db.ColumnFamily;
import org.apache.cassandra.db.RangeTombstone;
import org.apache.cassandra.db.RowMutation;
import org.apache.cassandra.db.SystemKeyspace;
import org.apache.cassandra.db.marshal.UTF8Type;
import org.apache.cassandra.utils.ByteBufferUtil;
public class TriggerOptions
{
private static final String CLASS_KEY = "class";
private static final String OPTIONS_KEY = "trigger_options";
public static Map<String, Map<String, String>> getAllTriggers(String ksName, String cfName)
{
String req = "SELECT * FROM system.%s WHERE keyspace_name='%s' AND columnfamily_name='%s'";
UntypedResultSet result = processInternal(String.format(req, SystemKeyspace.SCHEMA_TRIGGERS_CF, ksName, cfName));
Map<String, Map<String, String>> triggers = new HashMap<>();
if (result.isEmpty())
return triggers;
for (Row row : result)
triggers.put(row.getString("trigger_name"), row.getMap(OPTIONS_KEY, UTF8Type.instance, UTF8Type.instance));
return triggers;
}
public static void addColumns(RowMutation rm, String cfName, Entry<String, Map<String, String>> tentry, long modificationTimestamp)
{
ColumnFamily cf = rm.addOrGet(CFMetaData.SchemaTriggersCf);
assert tentry.getValue().get(CLASS_KEY) != null;
ColumnNameBuilder builder = CFMetaData.SchemaTriggersCf.getCfDef().getColumnNameBuilder();
builder.add(ByteBufferUtil.bytes(cfName)).add(ByteBufferUtil.bytes(tentry.getKey())).add(ByteBufferUtil.bytes(OPTIONS_KEY));
for (Entry<String, String> entry : tentry.getValue().entrySet())
{
ColumnNameBuilder builderCopy = builder.copy();
builderCopy.add(ByteBufferUtil.bytes(entry.getKey()));
cf.addColumn(builderCopy.build(), ByteBufferUtil.bytes(entry.getValue()), modificationTimestamp);
}
}
public static void deleteColumns(RowMutation rm, String cfName, Entry<String, Map<String, String>> tentry, long modificationTimestamp)
{
ColumnFamily cf = rm.addOrGet(CFMetaData.SchemaTriggersCf);
int ldt = (int) (System.currentTimeMillis() / 1000);
ColumnNameBuilder builder = CFMetaData.SchemaTriggersCf.getCfDef().getColumnNameBuilder();
builder.add(ByteBufferUtil.bytes(cfName)).add(ByteBufferUtil.bytes(tentry.getKey()));
cf.addAtom(new RangeTombstone(builder.build(), builder.buildAsEndOfRange(), modificationTimestamp, ldt));
}
public static void update(CFMetaData cfm, String triggerName, String clazz)
{
Map<String, Map<String, String>> existingTriggers = cfm.getTriggers();
assert existingTriggers.get(triggerName) == null;
Map<String, String> triggerUnit = new HashMap<>();
triggerUnit.put(CLASS_KEY, clazz);
existingTriggers.put(triggerName, triggerUnit);
cfm.triggers(existingTriggers);
}
public static void remove(CFMetaData cfm, String triggerName)
{
Map<String, Map<String, String>> existingTriggers = cfm.getTriggers(); // have a copy of the triggers
existingTriggers.remove(triggerName);
cfm.triggers(existingTriggers);
}
public static boolean hasTrigger(CFMetaData cfm, String triggerName)
{
return cfm.getTriggers().get(triggerName) != null;
}
public static Collection<String> extractClasses(Map<String, Map<String, String>> triggers)
{
List<String> classes = new ArrayList<>();
if (triggers.isEmpty())
return null;
for (Map<String, String> options : triggers.values())
classes.add(options.get(CLASS_KEY));
return classes;
}
}