/**
* 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.triggers;
import java.io.InputStream;
import java.nio.ByteBuffer;
import java.util.ArrayList;
import java.util.Collection;
import java.util.List;
import java.util.Properties;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.apache.cassandra.db.Column;
import org.apache.cassandra.db.ColumnFamily;
import org.apache.cassandra.db.RowMutation;
import org.apache.cassandra.io.util.FileUtils;
public class InvertedIndex implements ITrigger
{
private static final Logger logger = LoggerFactory.getLogger(InvertedIndex.class);
private Properties properties = loadProperties();
public Collection<RowMutation> augment(ByteBuffer key, ColumnFamily update)
{
List<RowMutation> mutations = new ArrayList<>();
for (Column cell : update)
{
// Skip the row marker and other empty values, since they lead to an empty key.
if (cell.value().remaining() > 0)
{
RowMutation mutation = new RowMutation(properties.getProperty("keyspace"), cell.value());
mutation.add(properties.getProperty("columnfamily"), cell.name(), key, System.currentTimeMillis());
mutations.add(mutation);
}
}
return mutations;
}
private static Properties loadProperties()
{
Properties properties = new Properties();
InputStream stream = InvertedIndex.class.getClassLoader().getResourceAsStream("InvertedIndex.properties");
try
{
properties.load(stream);
}
catch (Exception e)
{
throw new RuntimeException(e);
}
finally
{
FileUtils.closeQuietly(stream);
}
logger.info("loaded property file, InvertedIndex.properties");
return properties;
}
}