| Classes in this File | Line Coverage | Branch Coverage | Complexity | ||||
| TurbinePipeline |
|
| 2.125;2,125 |
| 1 | package org.apache.turbine.pipeline; | |
| 2 | ||
| 3 | ||
| 4 | /* | |
| 5 | * Licensed to the Apache Software Foundation (ASF) under one | |
| 6 | * or more contributor license agreements. See the NOTICE file | |
| 7 | * distributed with this work for additional information | |
| 8 | * regarding copyright ownership. The ASF licenses this file | |
| 9 | * to you under the Apache License, Version 2.0 (the | |
| 10 | * "License"); you may not use this file except in compliance | |
| 11 | * with the License. You may obtain a copy of the License at | |
| 12 | * | |
| 13 | * http://www.apache.org/licenses/LICENSE-2.0 | |
| 14 | * | |
| 15 | * Unless required by applicable law or agreed to in writing, | |
| 16 | * software distributed under the License is distributed on an | |
| 17 | * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY | |
| 18 | * KIND, either express or implied. See the License for the | |
| 19 | * specific language governing permissions and limitations | |
| 20 | * under the License. | |
| 21 | */ | |
| 22 | ||
| 23 | ||
| 24 | import java.io.IOException; | |
| 25 | ||
| 26 | import org.apache.turbine.util.RunData; | |
| 27 | import org.apache.turbine.util.TurbineException; | |
| 28 | ||
| 29 | /** | |
| 30 | * Flexible implementation of a {@link org.apache.turbine.Pipeline}. | |
| 31 | * Originally based on code from Catalina and ideas from Apache httpd. | |
| 32 | * | |
| 33 | * @author <a href="mailto:dlr@finemaltcoding.com">Daniel Rall</a> | |
| 34 | * @author <a href="mailto:jvanzyl@zenplex.com">Jason van Zyl</a> | |
| 35 | * @author <a href="mailto:peter@courcoux.biz">Peter Courcoux</a> | |
| 36 | */ | |
| 37 | 26 | public class TurbinePipeline |
| 38 | implements Pipeline, ValveContext | |
| 39 | { | |
| 40 | /** | |
| 41 | * The "Turbine Classic" pipeline. | |
| 42 | */ | |
| 43 | 62 | public static String CLASSIC_PIPELINE = |
| 44 | "WEB-INF/conf/turbine-classic-pipeline.xml"; | |
| 45 | ||
| 46 | /** | |
| 47 | * Name of this pipeline. | |
| 48 | */ | |
| 49 | protected String name; | |
| 50 | ||
| 51 | /** | |
| 52 | * The set of Valves associated with this Pipeline. | |
| 53 | */ | |
| 54 | 26 | protected Valve[] valves = new Valve[0]; |
| 55 | ||
| 56 | /** | |
| 57 | * The per-thread execution state for processing through this | |
| 58 | * pipeline. The actual value is a java.lang.Integer object | |
| 59 | * containing the subscript into the <code>values</code> array, or | |
| 60 | * a subscript equal to <code>values.length</code> if the basic | |
| 61 | * Valve is currently being processed. | |
| 62 | */ | |
| 63 | 26 | protected ThreadLocal<Integer> state= new ThreadLocal<Integer>(); |
| 64 | ||
| 65 | /** | |
| 66 | * @see org.apache.turbine.Pipeline#initialize() | |
| 67 | */ | |
| 68 | public void initialize() | |
| 69 | throws Exception | |
| 70 | { | |
| 71 | 104 | if (state==null) |
| 72 | { | |
| 73 | 94 | state = new ThreadLocal<Integer>(); |
| 74 | } | |
| 75 | ||
| 76 | // Valve implementations are added to this Pipeline using the | |
| 77 | // Mapper. | |
| 78 | ||
| 79 | // Initialize the valves | |
| 80 | 960 | for (int i = 0; i < valves.length; i++) |
| 81 | { | |
| 82 | 856 | valves[i].initialize(); |
| 83 | } | |
| 84 | 104 | } |
| 85 | ||
| 86 | /** | |
| 87 | * Set the name of this pipeline. | |
| 88 | * | |
| 89 | * @param name Name of this pipeline. | |
| 90 | */ | |
| 91 | public void setName(String name) | |
| 92 | { | |
| 93 | 0 | this.name = name; |
| 94 | 0 | } |
| 95 | ||
| 96 | /** | |
| 97 | * Get the name of this pipeline. | |
| 98 | * | |
| 99 | * @return String Name of this pipeline. | |
| 100 | */ | |
| 101 | public String getName() | |
| 102 | { | |
| 103 | 0 | return name; |
| 104 | } | |
| 105 | ||
| 106 | /** | |
| 107 | * @see org.apache.turbine.Pipeline#addValve(Valve) | |
| 108 | */ | |
| 109 | public void addValve(Valve valve) | |
| 110 | { | |
| 111 | // Add this Valve to the set associated with this Pipeline | |
| 112 | 32 | synchronized (valves) |
| 113 | { | |
| 114 | 32 | Valve[] results = new Valve[valves.length + 1]; |
| 115 | 32 | System.arraycopy(valves, 0, results, 0, valves.length); |
| 116 | 32 | results[valves.length] = valve; |
| 117 | 32 | valves = results; |
| 118 | 32 | } |
| 119 | 32 | } |
| 120 | ||
| 121 | /** | |
| 122 | * @see org.apache.turbine.Pipeline#getValves() | |
| 123 | */ | |
| 124 | public Valve[] getValves() | |
| 125 | { | |
| 126 | 6 | synchronized (valves) |
| 127 | { | |
| 128 | 6 | Valve[] results = new Valve[valves.length]; |
| 129 | 6 | System.arraycopy(valves, 0, results, 0, valves.length); |
| 130 | 6 | return results; |
| 131 | 0 | } |
| 132 | } | |
| 133 | ||
| 134 | /** | |
| 135 | * @see org.apache.turbine.Pipeline#removeValve(Valve) | |
| 136 | */ | |
| 137 | public void removeValve(Valve valve) | |
| 138 | { | |
| 139 | 0 | synchronized (valves) |
| 140 | { | |
| 141 | // Locate this Valve in our list | |
| 142 | 0 | int index = -1; |
| 143 | 0 | for (int i = 0; i < valves.length; i++) |
| 144 | { | |
| 145 | 0 | if (valve == valves[i]) |
| 146 | { | |
| 147 | 0 | index = i; |
| 148 | 0 | break; |
| 149 | } | |
| 150 | } | |
| 151 | 0 | if (index < 0) |
| 152 | { | |
| 153 | 0 | return; |
| 154 | } | |
| 155 | ||
| 156 | // Remove this valve from our list | |
| 157 | 0 | Valve[] results = new Valve[valves.length - 1]; |
| 158 | 0 | int n = 0; |
| 159 | 0 | for (int i = 0; i < valves.length; i++) |
| 160 | { | |
| 161 | 0 | if (i == index) |
| 162 | { | |
| 163 | 0 | continue; |
| 164 | } | |
| 165 | 0 | results[n++] = valves[i]; |
| 166 | } | |
| 167 | 0 | valves = results; |
| 168 | 0 | } |
| 169 | 0 | } |
| 170 | ||
| 171 | /** | |
| 172 | * @see org.apache.turbine.Pipeline#invoke(RunData) | |
| 173 | */ | |
| 174 | public void invoke(PipelineData pipelineData) | |
| 175 | throws TurbineException, IOException | |
| 176 | { | |
| 177 | // Initialize the per-thread state for this thread | |
| 178 | 24 | state.set(Integer.valueOf(0)); |
| 179 | ||
| 180 | // Invoke the first Valve in this pipeline for this request | |
| 181 | 24 | invokeNext(pipelineData); |
| 182 | 22 | } |
| 183 | ||
| 184 | /** | |
| 185 | * @see org.apache.turbine.ValveContext#invokeNext(RunData) | |
| 186 | */ | |
| 187 | public void invokeNext(PipelineData pipelineData) | |
| 188 | throws TurbineException, IOException | |
| 189 | { | |
| 190 | // Identify the current subscript for the current request thread | |
| 191 | 60 | Integer current = state.get(); |
| 192 | 60 | int subscript = current.intValue(); |
| 193 | ||
| 194 | 60 | if (subscript < valves.length) |
| 195 | { | |
| 196 | // Invoke the requested Valve for the current request | |
| 197 | // thread and increment its thread-local state. | |
| 198 | 38 | state.set(Integer.valueOf(subscript + 1)); |
| 199 | 38 | valves[subscript].invoke(pipelineData, this); |
| 200 | } | |
| 201 | 46 | } |
| 202 | } |