| /* |
| * 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.locator; |
| |
| import java.io.InputStream; |
| import java.net.URL; |
| import java.util.Properties; |
| |
| import org.apache.cassandra.io.util.FileUtils; |
| import org.slf4j.Logger; |
| import org.slf4j.LoggerFactory; |
| |
| public class SnitchProperties |
| { |
| private static final Logger logger = LoggerFactory.getLogger(SnitchProperties.class); |
| public static final String RACKDC_PROPERTY_FILENAME = "cassandra-rackdc.properties"; |
| |
| private Properties properties; |
| |
| public SnitchProperties() |
| { |
| properties = new Properties(); |
| InputStream stream = null; |
| String configURL = System.getProperty(RACKDC_PROPERTY_FILENAME); |
| try |
| { |
| URL url; |
| if (configURL == null) |
| url = SnitchProperties.class.getClassLoader().getResource(RACKDC_PROPERTY_FILENAME); |
| else |
| url = new URL(configURL); |
| |
| stream = url.openStream(); // catch block handles potential NPE |
| properties.load(stream); |
| } |
| catch (Exception e) |
| { |
| // do not throw exception here, just consider this an incomplete or an empty property file. |
| logger.warn("Unable to read {}", ((configURL != null) ? configURL : RACKDC_PROPERTY_FILENAME)); |
| } |
| finally |
| { |
| FileUtils.closeQuietly(stream); |
| } |
| } |
| |
| /** |
| * Get a snitch property value or return defaultValue if not defined. |
| */ |
| public String get(String propertyName, String defaultValue) |
| { |
| return properties.getProperty(propertyName, defaultValue); |
| } |
| |
| public boolean contains(String propertyName) |
| { |
| return properties.containsKey(propertyName); |
| } |
| } |