| /** |
| * 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.hadoop.tools.rumen; |
| |
| import java.util.ArrayList; |
| import java.util.Collections; |
| import java.util.HashMap; |
| import java.util.List; |
| import java.util.Map; |
| import java.util.Set; |
| import java.util.TreeSet; |
| |
| import org.codehaus.jackson.annotate.JsonAnySetter; |
| |
| /** |
| * A {@link LoggedLocation} is a representation of a point in an hierarchical |
| * network, represented as a series of membership names, broadest first. |
| * |
| * For example, if your network has <i>hosts</i> grouped into <i>racks</i>, then |
| * in onecluster you might have a node {@code node1} on rack {@code rack1}. This |
| * would be represented with a ArrayList of two layers, with two {@link String} |
| * s being {@code "rack1"} and {@code "node1"}. |
| * |
| * The details of this class are set up to meet the requirements of the Jackson |
| * JSON parser/generator. |
| * |
| * All of the public methods are simply accessors for the instance variables we |
| * want to write out in the JSON files. |
| * |
| */ |
| public class LoggedLocation implements DeepCompare { |
| static final Map<List<String>, List<String>> layersCache = |
| new HashMap<List<String>, List<String>>(); |
| |
| /** |
| * The full path from the root of the network to the host. |
| * |
| * NOTE that this assumes that the network topology is a tree. |
| */ |
| List<String> layers = Collections.emptyList(); |
| |
| static private Set<String> alreadySeenAnySetterAttributes = |
| new TreeSet<String>(); |
| |
| public List<String> getLayers() { |
| return layers; |
| } |
| |
| void setLayers(List<String> layers) { |
| if (layers == null || layers.isEmpty()) { |
| this.layers = Collections.emptyList(); |
| } else { |
| synchronized (layersCache) { |
| List<String> found = layersCache.get(layers); |
| if (found == null) { |
| // make a copy with interned string. |
| List<String> clone = new ArrayList<String>(layers.size()); |
| for (String s : layers) { |
| clone.add(s.intern()); |
| } |
| // making it read-only as we are sharing them. |
| List<String> readonlyLayers = Collections.unmodifiableList(clone); |
| layersCache.put(readonlyLayers, readonlyLayers); |
| this.layers = readonlyLayers; |
| } else { |
| this.layers = found; |
| } |
| } |
| } |
| } |
| |
| @SuppressWarnings("unused") |
| // for input parameter ignored. |
| @JsonAnySetter |
| public void setUnknownAttribute(String attributeName, Object ignored) { |
| if (!alreadySeenAnySetterAttributes.contains(attributeName)) { |
| alreadySeenAnySetterAttributes.add(attributeName); |
| System.err.println("In LoggedJob, we saw the unknown attribute " |
| + attributeName + "."); |
| } |
| } |
| |
| // I'll treat this as an atomic object type |
| private void compareStrings(List<String> c1, List<String> c2, TreePath loc, |
| String eltname) throws DeepInequalityException { |
| if (c1 == null && c2 == null) { |
| return; |
| } |
| |
| TreePath recursePath = new TreePath(loc, eltname); |
| |
| if (c1 == null || c2 == null || !c1.equals(c2)) { |
| throw new DeepInequalityException(eltname + " miscompared", recursePath); |
| } |
| } |
| |
| public void deepCompare(DeepCompare comparand, TreePath loc) |
| throws DeepInequalityException { |
| if (!(comparand instanceof LoggedLocation)) { |
| throw new DeepInequalityException("comparand has wrong type", loc); |
| } |
| |
| LoggedLocation other = (LoggedLocation) comparand; |
| |
| compareStrings(layers, other.layers, loc, "layers"); |
| |
| } |
| } |