| /** |
| * 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.ambari.server.controller; |
| |
| import java.io.File; |
| import java.io.FileInputStream; |
| import java.io.FileNotFoundException; |
| import java.io.IOException; |
| import java.io.InputStream; |
| import java.util.Properties; |
| |
| import org.apache.ambari.server.configuration.Configuration; |
| import org.slf4j.Logger; |
| import org.slf4j.LoggerFactory; |
| |
| import com.google.inject.Inject; |
| import com.google.inject.Singleton; |
| |
| /** |
| * Stores the mapping of hostnames to be used in any configuration on |
| * the server. |
| * |
| */ |
| @Singleton |
| public class HostsMap { |
| private final static Logger LOG = LoggerFactory |
| .getLogger(HostsMap.class); |
| |
| private String hostsMapFile; |
| private Properties hostsMap; |
| |
| @Inject |
| public HostsMap(Configuration conf) { |
| hostsMapFile = conf.getHostsMapFile(); |
| setupMap(); |
| } |
| |
| public HostsMap(String file) { |
| hostsMapFile = file; |
| } |
| |
| public void setupMap() { |
| InputStream inputStream = null; |
| LOG.info("Using hostsmap file " + this.hostsMapFile); |
| try { |
| if (hostsMapFile != null) { |
| hostsMap = new Properties(); |
| inputStream = new FileInputStream(new File(hostsMapFile)); |
| // load the properties |
| hostsMap.load(inputStream); |
| } |
| } catch (FileNotFoundException fnf) { |
| LOG.info("No configuration file " + hostsMapFile + " found in classpath.", fnf); |
| } catch (IOException ie) { |
| throw new IllegalArgumentException("Can't read configuration file " + |
| hostsMapFile, ie); |
| } finally { |
| if (inputStream != null) { |
| try { |
| inputStream.close(); |
| } catch(IOException io) { |
| //ignore |
| } |
| } |
| } |
| } |
| |
| /** |
| * Return map of the hostname if available |
| * @param hostName hostname map |
| * @return |
| */ |
| public String getHostMap(String hostName) { |
| if (hostsMapFile == null) |
| return hostName; |
| return hostsMap.getProperty(hostName, hostName); |
| } |
| |
| } |