test/unit/org/apache/cassandra/OffsetAwareConfigurationLoader.java

/**
 * 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
 * <p/>
 * http://www.apache.org/licenses/LICENSE-2.0
 * <p/>
 * 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;

import org.apache.cassandra.config.Config;
import org.apache.cassandra.config.YamlConfigurationLoader;
import org.apache.cassandra.exceptions.ConfigurationException;

import java.io.File;


public class OffsetAwareConfigurationLoader extends YamlConfigurationLoader
{

    static final String OFFSET_PROPERTY = "cassandra.test.offsetseed";
    int offset = 0;

    public OffsetAwareConfigurationLoader()
    {
        String offsetStr = System.getProperty(OFFSET_PROPERTY);

        if (offsetStr == null)
            throw new RuntimeException("offset property is not set: "+OFFSET_PROPERTY);

        offset = Integer.valueOf(offsetStr);

        assert offset >= 0;
    }

    @Override
    public Config loadConfig() throws ConfigurationException
    {
        Config config = super.loadConfig();


        config.rpc_port += offset;
        config.native_transport_port += offset;
        config.storage_port += offset;

        config.commitlog_directory += File.pathSeparator + offset;
        config.saved_caches_directory += File.pathSeparator + offset;
        config.hints_directory += File.pathSeparator + offset;
        for (int i = 0; i < config.data_file_directories.length; i++)
            config.data_file_directories[i] += File.pathSeparator + offset;


        return config;
    }
}