001/* 002 * Licensed to the Apache Software Foundation (ASF) under one 003 * or more contributor license agreements. See the NOTICE file 004 * distributed with this work for additional information 005 * regarding copyright ownership. The ASF licenses this file 006 * to you under the Apache License, Version 2.0 (the 007 * "License"); you may not use this file except in compliance 008 * with the License. You may obtain a copy of the License at 009 * 010 * http://www.apache.org/licenses/LICENSE-2.0 011 * 012 * Unless required by applicable law or agreed to in writing, 013 * software distributed under the License is distributed on an 014 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY 015 * KIND, either express or implied. See the License for the 016 * specific language governing permissions and limitations 017 * under the License. 018 */ 019package org.apache.reef.wake.impl; 020 021import org.apache.reef.wake.Identifier; 022import org.apache.reef.wake.IdentifierFactory; 023import org.apache.reef.wake.remote.exception.RemoteRuntimeException; 024import org.apache.reef.wake.remote.impl.SocketRemoteIdentifier; 025 026import javax.inject.Inject; 027import java.lang.reflect.Constructor; 028import java.lang.reflect.InvocationTargetException; 029import java.util.HashMap; 030import java.util.Map; 031import java.util.logging.Level; 032import java.util.logging.Logger; 033 034/** 035 * Default remote identifier factory that creates a specific remote identifier 036 * from a string representation. 037 * <p> 038 * A string representation is broken into two parts type and type-specific details separated by "://" 039 * A remote identifier implementation should implement a constructor that accepts a string. 040 * The factory invokes a proper constructor by reflection. 041 */ 042public class DefaultIdentifierFactory implements IdentifierFactory { 043 044 private static final Logger LOG = Logger.getLogger(DefaultIdentifierFactory.class.getName()); 045 046 /** Map between type and remote identifier class. */ 047 private final Map<String, Class<? extends Identifier>> typeToClazzMap; 048 049 /** 050 * Constructs a default remote identifier factory. 051 */ 052 @Inject 053 public DefaultIdentifierFactory() { 054 typeToClazzMap = new HashMap<>(); 055 typeToClazzMap.put("socket", SocketRemoteIdentifier.class); 056 } 057 058 /** 059 * Constructs a default remote identifier factory. 060 * 061 * @param typeToClazzMap the map of type strings to classes of remote identifiers 062 */ 063 public DefaultIdentifierFactory(final Map<String, Class<? extends Identifier>> typeToClazzMap) { 064 this.typeToClazzMap = typeToClazzMap; 065 } 066 067 private static final Class<?>[] CONSTRUCTOR_ARG_TYPES = {String.class}; 068 069 /** 070 * Creates a new remote identifier instance. 071 * 072 * @param str a string representation 073 * @return a remote identifier 074 * @throws RemoteRuntimeException 075 */ 076 @Override 077 public Identifier getNewInstance(final String str) { 078 079 final int index = str.indexOf("://"); 080 if (index < 0) { 081 throw new RemoteRuntimeException("Invalid remote identifier name: " + str); 082 } 083 084 final String type = str.substring(0, index); 085 final Class<? extends Identifier> clazz = typeToClazzMap.get(type); 086 087 try { 088 089 final Constructor<? extends Identifier> constructor = clazz.getDeclaredConstructor(CONSTRUCTOR_ARG_TYPES); 090 final Object[] args = new Object[] {str.substring(index + 3)}; 091 092 final Identifier instance = constructor.newInstance(args); 093 LOG.log(Level.FINER, "Created new identifier: {0} for {1}", new Object[] {instance, str}); 094 return instance; 095 096 } catch (final NoSuchMethodException | SecurityException | InstantiationException 097 | IllegalAccessException | IllegalArgumentException | InvocationTargetException e) { 098 LOG.log(Level.SEVERE, "Cannot create new identifier for: " + str, e); 099 throw new RemoteRuntimeException(e); 100 } 101 } 102}