author | Ed Swartz <ed.swartz@nokia.com> |
Tue, 05 Jan 2010 11:23:50 -0600 | |
changeset 743 | 78fd666a897a |
parent 634 | baa31ffa93b5 |
child 1425 | 7903a1588fd4 |
permissions | -rw-r--r-- |
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/* |
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* Copyright (c) 2007-2009 Nokia Corporation and/or its subsidiary(-ies). |
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* All rights reserved. |
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* This component and the accompanying materials are made available |
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* under the terms of the License "Eclipse Public License v1.0" |
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* which accompanies this distribution, and is available |
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* at the URL "http://www.eclipse.org/legal/epl-v10.html". |
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* |
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* Initial Contributors: |
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* Nokia Corporation - initial contribution. |
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* |
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* Contributors: |
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* |
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* Description: |
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* |
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*/ |
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package com.nokia.carbide.internal.cpp.epoc.engine.model; |
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import com.nokia.carbide.cpp.epoc.engine.EpocEnginePlugin; |
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import com.nokia.carbide.cpp.epoc.engine.model.*; |
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import com.nokia.carbide.cpp.epoc.engine.preprocessor.*; |
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import com.nokia.cpp.internal.api.utils.core.*; |
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import org.eclipse.core.resources.*; |
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import org.eclipse.core.runtime.*; |
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import java.io.File; |
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import java.io.IOException; |
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import java.security.MessageDigest; |
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import java.security.NoSuchAlgorithmException; |
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import java.util.*; |
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/** |
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* This cache manages the data associated with an {@link IViewConfiguration} over a particular IModel. |
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* A model's IView must implement #getData() meaningfully for this to be used. |
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* |
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*/ |
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public class ViewDataCache<OwnedModel extends IOwnedModel, Model extends IModel, View extends IView, Data extends IData<View>> { |
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public static boolean DEBUG = false; |
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public static boolean DEBUG_VERBOSE = false; |
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/** A key which can retrieve the current state of a model for a given filter. */ |
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static class ViewConfigKey extends Pair<IPath, IViewFilter> { |
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public ViewConfigKey(IPath first, IViewFilter second) { |
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super(first, second); |
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} |
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} |
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/** The state of a view configuration, excluding the view filter. */ |
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static class ViewConfigState { |
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private Object manifest; |
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public ViewConfigState(IViewConfiguration second) { |
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//manifest = getMD5(getUniqueKey(second)); |
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manifest = getUniqueKey(second); |
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} |
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/** |
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* @param uniqueKey |
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* @return |
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*/ |
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/*private*/ Object getMD5(String uniqueKey) { |
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try { |
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MessageDigest md = MessageDigest.getInstance("MD5"); //$NON-NLS-1$ |
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return md.digest(uniqueKey.getBytes()); |
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} catch (NoSuchAlgorithmException e) { |
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return uniqueKey; |
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} |
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} |
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/* (non-Javadoc) |
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* @see java.lang.Object#toString() |
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*/ |
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@Override |
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public String toString() { |
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return manifest.toString(); |
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} |
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@Override |
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public int hashCode() { |
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final int prime = 31; |
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int result = 1; |
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result = prime * result |
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+ ((manifest == null) ? 0 : manifest.hashCode()); |
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return result; |
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} |
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@Override |
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public boolean equals(Object obj) { |
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if (this == obj) |
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return true; |
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if (obj == null) |
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return false; |
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if (getClass() != obj.getClass()) |
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return false; |
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final ViewConfigState other = (ViewConfigState) obj; |
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if (manifest == null) { |
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if (other.manifest != null) |
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return false; |
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} else if (!manifest.equals(other.manifest)) |
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return false; |
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return true; |
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} |
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/** |
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* Get a unique key from the view configuration so we can compare its state to another. |
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* @param second |
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* @return Object implementing #equals and #hashCode properly |
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*/ |
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private static String getUniqueKey(IViewConfiguration viewConfiguration) { |
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String macroState = getMacroState(viewConfiguration.getMacros()); |
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String filterState = "" + viewConfiguration.getViewFilter().hashCode(); //$NON-NLS-1$ |
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IViewParserConfiguration parserConfig = viewConfiguration.getViewParserConfiguration(); |
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String includeState = getIncludeState(parserConfig.getIncludeFileLocator()); |
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String projectState = parserConfig.getProjectLocation().toOSString(); |
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return filterState + "/" + projectState + "/" + includeState + "/" + macroState; //$NON-NLS-1$ //$NON-NLS-2$ //$NON-NLS-3$ |
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} |
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/** |
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* @param includeFileLocator |
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* @return |
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*/ |
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126 |
private static String getIncludeState( |
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127 |
IIncludeFileLocator includeFileLocator) { |
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StringBuilder builder = new StringBuilder(); |
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File[] dirs = includeFileLocator.getUserPaths(); |
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for (File dir : dirs) { |
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131 |
builder.append(dir.getAbsolutePath()); |
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132 |
builder.append('\u0001'); |
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133 |
} |
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dirs = includeFileLocator.getSystemPaths(); |
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135 |
for (File dir : dirs) { |
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136 |
builder.append(dir.getAbsolutePath()); |
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137 |
builder.append('\u0001'); |
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138 |
} |
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139 |
return builder.toString(); |
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140 |
} |
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141 |
|
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142 |
/** |
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143 |
* @param macros |
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144 |
* @return |
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145 |
*/ |
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146 |
private static String getMacroState(Collection<IDefine> macros) { |
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147 |
StringBuilder builder = new StringBuilder(); |
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148 |
|
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// assume that the macros are in a sensible order to begin with |
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150 |
/* |
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151 |
ArrayList<IDefine> sortedMacros = new ArrayList<IDefine>(macros); |
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Collections.sort(sortedMacros, new Comparator<IDefine> () { |
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153 |
|
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154 |
public int compare(IDefine o1, IDefine o2) { |
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return o1.getName().compareTo(o2.getName()); |
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156 |
} |
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157 |
}); |
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158 |
for (IDefine define : sortedMacros) { |
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159 |
*/ |
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160 |
for (IDefine define : macros) { |
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161 |
builder.append(define.getDefinitionText()); |
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162 |
builder.append('\u0001'); |
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163 |
} |
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|
164 |
return builder.toString(); |
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165 |
} |
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166 |
|
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|
167 |
} |
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168 |
|
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169 |
/** the minimum number of hits (accesses) to the entry to keep it when flushing cache. */ |
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170 |
private static final int DEFAULT_MINIMUM_HITS_TO_KEEP = 8; |
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171 |
|
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172 |
private IModelProvider<OwnedModel, Model> modelProvider; |
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private Map<ViewConfigKey, Pair<ViewConfigState, Data>> cachedData; |
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174 |
private Map<ViewConfigKey, ExternalFileInfoCollection> cachedFileInfo; |
0
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175 |
private Map<ViewConfigKey, Integer> cacheHits; |
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176 |
private List<ViewConfigKey> cacheOrder; |
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177 |
|
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178 |
private int maxCacheSize; |
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179 |
|
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180 |
private int minimumHitsToKeep; |
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181 |
|
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182 |
public ViewDataCache(IModelProvider<OwnedModel, Model> provider, int maxCacheSize) { |
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183 |
this.maxCacheSize = maxCacheSize; |
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184 |
this.minimumHitsToKeep = DEFAULT_MINIMUM_HITS_TO_KEEP; |
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185 |
|
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186 |
this.modelProvider = provider; |
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187 |
this.cachedData = new HashMap<ViewConfigKey, Pair<ViewConfigState,Data>>(); |
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|
188 |
this.cachedFileInfo = new HashMap<ViewConfigKey, ExternalFileInfoCollection>(); |
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189 |
this.cacheHits = new HashMap<ViewConfigKey, Integer>(); |
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190 |
this.cacheOrder = new LinkedList<ViewConfigKey>(); |
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191 |
} |
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192 |
|
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193 |
/** |
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194 |
* Get cached data for the model and the given configuration. |
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195 |
* @param modelPath full filesystem path to model |
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196 |
* @param configuration view configuration to use |
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197 |
* @return cached data for the model/configuration tuple or <code>null</code> if data could not be determined |
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198 |
* @throws CoreException |
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199 |
*/ |
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200 |
public Data getData(IPath modelPath, IViewConfiguration configuration) throws CoreException { |
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|
201 |
// handle incorrect use of non-absolute paths |
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|
202 |
if (Platform.isRunning()) { |
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|
203 |
if (modelPath.segmentCount() > 0 |
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204 |
&& (!modelPath.isAbsolute() || !modelPath.toFile().exists())) { |
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|
205 |
IWorkspaceRoot root = ResourcesPlugin.getWorkspace().getRoot(); |
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|
206 |
IPath resourcePath = null; |
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|
207 |
IResource resource = root.getFile(modelPath); |
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|
208 |
if (resource != null) { |
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|
209 |
resourcePath = resource.getLocation(); |
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|
210 |
} |
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|
211 |
|
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|
212 |
if (resourcePath != null) { |
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|
213 |
modelPath = resourcePath; |
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|
214 |
} else { |
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|
215 |
return null; |
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|
216 |
/* |
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|
217 |
// Kinda tricky: get the real project location first |
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|
218 |
IProject project = root.getProject(modelPath.segment(0)); |
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|
219 |
if (project == null) |
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|
220 |
return null; |
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|
221 |
IPath projectPath = ProjectUtils.getRealProjectLocation(project); |
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|
222 |
if (projectPath != null) { |
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223 |
modelPath = projectPath.append(modelPath.removeFirstSegments(1)); |
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|
224 |
} |
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|
225 |
*/ |
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|
226 |
} |
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|
227 |
} |
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|
228 |
} |
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|
229 |
try { |
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|
230 |
modelPath = new Path(modelPath.toFile().getCanonicalPath()); |
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|
231 |
} catch (IOException e) { |
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|
232 |
} |
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|
233 |
|
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|
234 |
Data data = null; |
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|
235 |
ViewConfigState state = new ViewConfigState(configuration); |
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236 |
ViewConfigKey key = new ViewConfigKey(modelPath, configuration.getViewFilter()); |
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|
237 |
|
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238 |
synchronized (cachedData) { |
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|
239 |
reduceCache(key); |
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|
240 |
data = findData(modelPath, configuration, state, key); |
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|
241 |
} |
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|
242 |
|
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|
243 |
// do not lock while fetching data |
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|
244 |
if (data == null) { |
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|
245 |
data = getViewData(modelPath, configuration, state, key); |
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|
246 |
} |
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|
247 |
|
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|
248 |
|
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|
249 |
return data; |
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|
250 |
} |
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|
251 |
|
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252 |
/** |
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253 |
* Find data in cache. Called with cachedData locked. |
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254 |
* @param modelPath |
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255 |
* @param configuration |
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256 |
* @param state |
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* @param key |
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* @return the data, or <code>null</code> if not cached |
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* @throws CoreException |
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260 |
*/ |
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261 |
private Data findData(IPath modelPath, |
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262 |
IViewConfiguration configuration, ViewConfigState state, |
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263 |
ViewConfigKey key) throws CoreException { |
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264 |
|
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Data data = null; |
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266 |
Pair<ViewConfigState, Data> statefulData; |
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267 |
|
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268 |
if (DEBUG) { |
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269 |
//System.out.println("State = " + state); |
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270 |
} |
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statefulData = cachedData.get(key); |
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272 |
if (statefulData != null) { |
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273 |
// now check that the file info is valid. |
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274 |
ExternalFileInfoCollection fileinfo = cachedFileInfo.get(key); |
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if (fileinfo.anyChanged()) { |
0
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if (DEBUG) { |
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277 |
System.out.println("One or more relevant files changed for " + modelPath); //$NON-NLS-1$ |
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278 |
} |
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279 |
removeAllEntriesForModel(modelPath); |
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280 |
statefulData = null; |
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281 |
} else { |
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282 |
// see if the parse context is still the same |
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283 |
if (!statefulData.first.equals(state)) { |
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284 |
if (DEBUG) { |
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285 |
String orig = statefulData.first.toString(); |
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String curr = state.toString(); |
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287 |
System.out.println("State changed (from:\n" //$NON-NLS-1$ |
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288 |
+ orig.substring(0, Math.min(100, orig.length())) + "\nto:\n" + //$NON-NLS-1$ |
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|
289 |
curr.substring(0, Math.min(100, curr.length())) + ")\n"); //$NON-NLS-1$ |
0
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290 |
} |
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291 |
removeEntry(key); |
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|
292 |
cachedData.remove(key); |
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|
293 |
statefulData = null; |
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|
294 |
} |
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|
295 |
} |
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|
296 |
} |
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297 |
|
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298 |
if (statefulData != null) { |
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299 |
if (DEBUG_VERBOSE) { |
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|
300 |
System.out.println("Found entry for " + key); //$NON-NLS-1$ |
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301 |
} |
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cacheHits.put(key, cacheHits.get(key) + 1); |
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303 |
data = statefulData.second; |
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|
304 |
} |
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|
305 |
return data; |
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|
306 |
} |
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307 |
|
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308 |
/** |
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309 |
* Get the data from a view. This does not hold cachedData -- instead, |
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310 |
* we allow the risk of caching data twice to avoid deadlocking when |
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311 |
* one thread attempts to get cached data on a view which has trigged |
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312 |
* code on a save (boog 7882). |
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|
313 |
* <p> |
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314 |
* TODO: may be possible to lock only for a particular use of ViewConfigKey. |
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|
315 |
* As it is, this locks the whole cache for each model. |
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|
316 |
* </p> |
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|
317 |
* @param modelPath |
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|
318 |
* @param configuration |
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|
319 |
* @param state |
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|
320 |
* @param key |
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|
321 |
* @return |
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|
322 |
* @throws CoreException |
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|
323 |
*/ |
634
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Move constant about minimum file timestamp resolution into FileUtils
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|
324 |
@SuppressWarnings("unchecked") |
0
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|
325 |
private Data getViewData(IPath modelPath, IViewConfiguration configuration, |
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|
326 |
ViewConfigState state, ViewConfigKey key) throws CoreException { |
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|
327 |
Data data; |
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|
328 |
if (DEBUG) { |
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|
329 |
System.out.println("Fetching view data for " + key); //$NON-NLS-1$ |
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|
330 |
} |
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|
331 |
Model model = modelProvider.getSharedModel(modelPath); |
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|
332 |
if (model == null) |
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|
333 |
return null; |
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|
334 |
try { |
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|
335 |
View view = (View) model.createView(configuration); |
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|
336 |
if (view == null) |
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|
337 |
return null; |
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|
338 |
|
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|
339 |
try { |
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|
340 |
data = (Data) view.getData(); |
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|
341 |
if (data == null) |
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|
342 |
return null; |
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|
343 |
|
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Fix filesystem caching performance as in bug #10318
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|
344 |
IPath[] referencedFiles = view.getReferencedFiles(); |
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|
345 |
File[] files = new File[referencedFiles.length]; |
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|
346 |
for (int idx = 0; idx < referencedFiles.length; idx++) { |
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|
347 |
files[idx] = referencedFiles[idx].toFile(); |
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|
348 |
} |
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Fix filesystem caching performance as in bug #10318
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|
349 |
|
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Fix filesystem caching performance as in bug #10318
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|
350 |
ExternalFileInfoCollection fileinfo = |
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|
351 |
new ExternalFileInfoCollection( |
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|
352 |
EpocEnginePlugin.getExternalFileInfoCache(), |
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|
353 |
files, |
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|
354 |
FileUtils.getMinimumFileTimestampResolution(modelPath)); |
0
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|
355 |
synchronized (cachedData) { |
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|
356 |
// the data may have already been registered... oh well |
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|
357 |
cachedData.put(key, new Pair<ViewConfigState, Data>(state, data)); |
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|
358 |
cachedFileInfo.put(key, fileinfo); |
0
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|
359 |
cacheOrder.add(0, key); |
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|
360 |
cacheHits.put(key, 0); |
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|
361 |
} |
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|
362 |
} finally { |
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|
363 |
view.dispose(); |
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|
364 |
} |
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|
365 |
} finally { |
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|
366 |
modelProvider.releaseSharedModel(model); |
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|
367 |
} |
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|
368 |
return data; |
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|
369 |
} |
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|
370 |
|
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|
371 |
/** |
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|
372 |
* @param modelPath |
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|
373 |
*/ |
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|
374 |
private void removeAllEntriesForModel(IPath modelPath) { |
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|
375 |
ViewConfigKey[] keys = (ViewConfigKey[]) cachedData.keySet().toArray(new ViewConfigKey[cachedData.keySet().size()]); |
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|
376 |
for (ViewConfigKey key : keys) { |
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|
377 |
if (key.first.equals(modelPath)) { |
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DP tools release version Revision: 200912
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|
378 |
removeEntry(key); |
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parents:
diff
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|
379 |
} |
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DP tools release version Revision: 200912
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parents:
diff
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|
380 |
} |
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DP tools release version Revision: 200912
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diff
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|
381 |
} |
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DP tools release version Revision: 200912
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diff
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|
382 |
|
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DP tools release version Revision: 200912
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diff
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|
383 |
/** |
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DP tools release version Revision: 200912
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parents:
diff
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|
384 |
* @param key |
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DP tools release version Revision: 200912
Deepak Modgil <Deepak.Modgil@Nokia.com>
parents:
diff
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|
385 |
*/ |
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DP tools release version Revision: 200912
Deepak Modgil <Deepak.Modgil@Nokia.com>
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diff
changeset
|
386 |
private void removeEntry(ViewConfigKey key) { |
743
78fd666a897a
Fix filesystem caching performance as in bug #10318
Ed Swartz <ed.swartz@nokia.com>
parents:
634
diff
changeset
|
387 |
cachedFileInfo.remove(key); |
78fd666a897a
Fix filesystem caching performance as in bug #10318
Ed Swartz <ed.swartz@nokia.com>
parents:
634
diff
changeset
|
388 |
|
78fd666a897a
Fix filesystem caching performance as in bug #10318
Ed Swartz <ed.swartz@nokia.com>
parents:
634
diff
changeset
|
389 |
// do not lose info about file importance |
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Fix filesystem caching performance as in bug #10318
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diff
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|
390 |
//cacheHits.remove(key); |
0
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DP tools release version Revision: 200912
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diff
changeset
|
391 |
cacheOrder.remove(key); |
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DP tools release version Revision: 200912
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diff
changeset
|
392 |
cachedData.remove(key); |
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DP tools release version Revision: 200912
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parents:
diff
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|
393 |
} |
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DP tools release version Revision: 200912
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parents:
diff
changeset
|
394 |
|
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DP tools release version Revision: 200912
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parents:
diff
changeset
|
395 |
/** |
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DP tools release version Revision: 200912
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diff
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|
396 |
* Reduce the cache, leaving items for 'retainKey' alone |
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DP tools release version Revision: 200912
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diff
changeset
|
397 |
* @param key |
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DP tools release version Revision: 200912
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diff
changeset
|
398 |
*/ |
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DP tools release version Revision: 200912
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changeset
|
399 |
private void reduceCache(ViewConfigKey retainKey) { |
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DP tools release version Revision: 200912
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|
400 |
if (cachedData.size() < maxCacheSize) |
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DP tools release version Revision: 200912
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|
401 |
return; |
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DP tools release version Revision: 200912
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diff
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|
402 |
|
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DP tools release version Revision: 200912
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diff
changeset
|
403 |
// threshold to remove enough from cache for the next run |
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DP tools release version Revision: 200912
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|
404 |
int toRemove = maxCacheSize / 8; |
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DP tools release version Revision: 200912
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diff
changeset
|
405 |
|
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DP tools release version Revision: 200912
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parents:
diff
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|
406 |
// first pass, to get stragglers |
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DP tools release version Revision: 200912
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parents:
diff
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|
407 |
ViewConfigKey[] keys = (ViewConfigKey[]) cacheOrder.toArray(new ViewConfigKey[cacheOrder.size()]); |
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diff
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|
408 |
for (int idx = keys.length; |
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DP tools release version Revision: 200912
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|
409 |
toRemove > 0 && idx > 0; ) { |
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DP tools release version Revision: 200912
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parents:
diff
changeset
|
410 |
ViewConfigKey key = keys[--idx]; |
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DP tools release version Revision: 200912
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parents:
diff
changeset
|
411 |
if (key.equals(retainKey)) |
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DP tools release version Revision: 200912
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diff
changeset
|
412 |
continue; |
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DP tools release version Revision: 200912
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parents:
diff
changeset
|
413 |
Integer hits = cacheHits.get(key); |
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DP tools release version Revision: 200912
Deepak Modgil <Deepak.Modgil@Nokia.com>
parents:
diff
changeset
|
414 |
if (hits == null || hits < minimumHitsToKeep) { |
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DP tools release version Revision: 200912
Deepak Modgil <Deepak.Modgil@Nokia.com>
parents:
diff
changeset
|
415 |
if (DEBUG) { |
743
78fd666a897a
Fix filesystem caching performance as in bug #10318
Ed Swartz <ed.swartz@nokia.com>
parents:
634
diff
changeset
|
416 |
System.out.println("*** Flushing " + key); //$NON-NLS-1$ |
0
fb279309251b
DP tools release version Revision: 200912
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parents:
diff
changeset
|
417 |
} |
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DP tools release version Revision: 200912
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parents:
diff
changeset
|
418 |
removeEntry(key); |
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DP tools release version Revision: 200912
Deepak Modgil <Deepak.Modgil@Nokia.com>
parents:
diff
changeset
|
419 |
toRemove--; |
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DP tools release version Revision: 200912
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parents:
diff
changeset
|
420 |
} |
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DP tools release version Revision: 200912
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parents:
diff
changeset
|
421 |
} |
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DP tools release version Revision: 200912
Deepak Modgil <Deepak.Modgil@Nokia.com>
parents:
diff
changeset
|
422 |
|
fb279309251b
DP tools release version Revision: 200912
Deepak Modgil <Deepak.Modgil@Nokia.com>
parents:
diff
changeset
|
423 |
// second pass, remove any to reduce size |
fb279309251b
DP tools release version Revision: 200912
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parents:
diff
changeset
|
424 |
keys = (ViewConfigKey[]) cacheOrder.toArray(new ViewConfigKey[cacheOrder.size()]); |
fb279309251b
DP tools release version Revision: 200912
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parents:
diff
changeset
|
425 |
for (int idx = keys.length; |
fb279309251b
DP tools release version Revision: 200912
Deepak Modgil <Deepak.Modgil@Nokia.com>
parents:
diff
changeset
|
426 |
toRemove > 0 && idx > 0; ) { |
fb279309251b
DP tools release version Revision: 200912
Deepak Modgil <Deepak.Modgil@Nokia.com>
parents:
diff
changeset
|
427 |
ViewConfigKey key = keys[--idx]; |
fb279309251b
DP tools release version Revision: 200912
Deepak Modgil <Deepak.Modgil@Nokia.com>
parents:
diff
changeset
|
428 |
if (key.equals(retainKey)) |
fb279309251b
DP tools release version Revision: 200912
Deepak Modgil <Deepak.Modgil@Nokia.com>
parents:
diff
changeset
|
429 |
continue; |
fb279309251b
DP tools release version Revision: 200912
Deepak Modgil <Deepak.Modgil@Nokia.com>
parents:
diff
changeset
|
430 |
if (DEBUG) { |
743
78fd666a897a
Fix filesystem caching performance as in bug #10318
Ed Swartz <ed.swartz@nokia.com>
parents:
634
diff
changeset
|
431 |
System.out.println("*** Flushing " + key); //$NON-NLS-1$ |
0
fb279309251b
DP tools release version Revision: 200912
Deepak Modgil <Deepak.Modgil@Nokia.com>
parents:
diff
changeset
|
432 |
} |
fb279309251b
DP tools release version Revision: 200912
Deepak Modgil <Deepak.Modgil@Nokia.com>
parents:
diff
changeset
|
433 |
removeEntry(key); |
fb279309251b
DP tools release version Revision: 200912
Deepak Modgil <Deepak.Modgil@Nokia.com>
parents:
diff
changeset
|
434 |
toRemove--; |
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DP tools release version Revision: 200912
Deepak Modgil <Deepak.Modgil@Nokia.com>
parents:
diff
changeset
|
435 |
} |
fb279309251b
DP tools release version Revision: 200912
Deepak Modgil <Deepak.Modgil@Nokia.com>
parents:
diff
changeset
|
436 |
|
fb279309251b
DP tools release version Revision: 200912
Deepak Modgil <Deepak.Modgil@Nokia.com>
parents:
diff
changeset
|
437 |
} |
fb279309251b
DP tools release version Revision: 200912
Deepak Modgil <Deepak.Modgil@Nokia.com>
parents:
diff
changeset
|
438 |
} |