| /* |
| * |
| * 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.crail.storage; |
| |
| import java.io.File; |
| import java.io.IOException; |
| import java.net.InetAddress; |
| import java.net.InetSocketAddress; |
| import java.net.InterfaceAddress; |
| import java.net.NetworkInterface; |
| import java.util.List; |
| |
| public class StorageUtils { |
| public static InetSocketAddress getDataNodeAddress(String ifname, int port) throws IOException { |
| NetworkInterface netif = NetworkInterface.getByName(ifname); |
| if (netif == null){ |
| throw new IOException("Cannot find network interface with name " + ifname); |
| } |
| List<InterfaceAddress> addresses = netif.getInterfaceAddresses(); |
| InetAddress addr = null; |
| for (InterfaceAddress address: addresses){ |
| if (address.getBroadcast() != null){ |
| InetAddress _addr = address.getAddress(); |
| addr = _addr; |
| } |
| } |
| |
| if (addr == null){ |
| throw new IOException("Network interface with name " + ifname + " has no valid IP address"); |
| } |
| InetSocketAddress inetAddr = new InetSocketAddress(addr, port); |
| return inetAddr; |
| } |
| |
| public static void clean(String base, String path) throws IOException { |
| try { |
| File dataDir = new File(path); |
| if (!dataDir.exists()){ |
| if (!dataDir.mkdirs()) { |
| throw new IOException("crail.datapath " + base + " either does not exist or has no write permissions"); |
| } |
| } |
| for (File child : dataDir.listFiles()) { |
| child.delete(); |
| } |
| } catch(SecurityException e) { |
| throw new IOException("Error when trying to access " + base, e); |
| } |
| } |
| |
| public static String getDatanodeDirectory(String datapath, InetSocketAddress address) throws IllegalArgumentException { |
| if (address == null) { |
| throw new IllegalArgumentException("Address paramater cannot be null!"); |
| } |
| return datapath + address.getAddress() + "-" + address.getPort(); |
| } |
| } |