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package org.webmacro.resource; |
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import java.io.File; |
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import java.util.StringTokenizer; |
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import org.slf4j.Logger; |
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import org.slf4j.LoggerFactory; |
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import org.webmacro.Broker; |
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import org.webmacro.InitException; |
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import org.webmacro.NotFoundException; |
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import org.webmacro.ResourceException; |
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import org.webmacro.Template; |
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import org.webmacro.TemplateException; |
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import org.webmacro.engine.FileTemplate; |
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import org.webmacro.util.Settings; |
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53 | 63 | final public class TemplateProvider extends CachingProvider |
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{ |
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56 | 40 | static Logger _log = LoggerFactory.getLogger(TemplateProvider.class); |
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59 | 40 | private static String _pathSeparator = ";"; |
60 | 63 | private String _templateDirectory[] = null; |
61 | 63 | private Broker _broker = null; |
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private String _templatePath; |
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private BrokerTemplateProviderHelper _btpHelper; |
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private ReloadDelayDecorator reloadDelay; |
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static |
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{ |
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try |
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{ |
75 | 40 | _pathSeparator = System.getProperty("path.separator"); |
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} |
77 | 0 | catch (Throwable t) |
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{ |
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80 | 40 | } |
81 | 40 | } |
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87 | 63 | public static class FTReloadContext extends CacheReloadContext |
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{ |
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private File file; |
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private long lastModified; |
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public FTReloadContext (File f, long lastModified) |
94 | 57 | { |
95 | 57 | this.file = f; |
96 | 57 | this.lastModified = lastModified; |
97 | 57 | } |
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public boolean shouldReload () |
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{ |
101 | 1779 | return (lastModified != file.lastModified()); |
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} |
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} |
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public void init (Broker b, Settings config) throws InitException |
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{ |
113 | 63 | super.init(b, config); |
114 | 63 | _broker = b; |
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try |
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{ |
118 | 63 | _templatePath = config.getSetting("TemplatePath", ""); |
119 | 63 | if (_templatePath.equals("")) |
120 | 63 | _log.info("Template path is empty; will load from class path"); |
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else |
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{ |
123 | 0 | StringTokenizer st = |
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new StringTokenizer(_templatePath, _pathSeparator); |
125 | 0 | _templateDirectory = new String[st.countTokens()]; |
126 | 0 | for (int i = 0; i < _templateDirectory.length; i++) |
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{ |
128 | 0 | String dir = st.nextToken(); |
129 | 0 | _templateDirectory[i] = dir; |
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} |
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} |
132 | 63 | reloadDelay = new ReloadDelayDecorator(); |
133 | 63 | reloadDelay.init(b, config); |
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135 | 63 | _btpHelper = new BrokerTemplateProviderHelper(); |
136 | 63 | _btpHelper.init(b, config); |
137 | 63 | _btpHelper.setReload(_cacheSupportsReload); |
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} |
139 | 0 | catch (Exception e) |
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{ |
141 | 0 | throw new InitException("Could not initialize", e); |
142 | 63 | } |
143 | 63 | } |
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final public String getType () |
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{ |
150 | 252 | return "template"; |
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} |
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final public Object load (String name, CacheElement ce) |
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throws ResourceException |
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{ |
159 | 57 | Object ret = null; |
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161 | 57 | _log.info("Loading template: " + name); |
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163 | 57 | File tFile = findFileTemplate(name); |
164 | 57 | if (tFile != null) |
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{ |
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try |
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{ |
168 | 0 | Template t = new FileTemplate(_broker, tFile); |
169 | 0 | t.parse(); |
170 | 0 | ret = t; |
171 | 0 | if (_cacheSupportsReload) |
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{ |
173 | 0 | CacheReloadContext reloadContext = |
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new FTReloadContext(tFile, tFile.lastModified()); |
175 | 0 | ce.setReloadContext(reloadDelay.decorate("file", |
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reloadContext)); |
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} |
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} |
179 | 0 | catch (NullPointerException npe) |
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{ |
181 | 0 | _log.warn("TemplateProvider: Template not found: " + name, |
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npe); |
183 | 0 | throw new ResourceException("Error fetching template " + name, npe); |
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} |
185 | 0 | catch (TemplateException e) |
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{ |
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|
188 | 0 | _log.warn("TemplateProvider: Error occured while parsing " |
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+ name, e); |
190 | 0 | throw new InvalidResourceException("Error parsing template " |
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+ name, e); |
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} |
193 | 0 | catch (Exception e) |
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{ |
195 | 0 | _log.warn("TemplateProvider: Error occured while fetching " |
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+ name, e); |
197 | 0 | throw new ResourceException("Error fetching template " + name, e); |
198 | 0 | } |
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} |
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else |
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{ |
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203 | 57 | ret = _btpHelper.load(name, ce); |
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} |
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206 | 57 | if (ret == null) |
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{ |
208 | 0 | throw new NotFoundException( |
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this + " could not locate " + name + " on path " + _templatePath); |
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} |
211 | 57 | return ret; |
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} |
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final private File findFileTemplate (String fileName) |
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{ |
224 | 57 | if (_templateDirectory != null) |
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{ |
226 | 0 | _log.debug("Looking for template in TemplatePath: " + fileName); |
227 | 0 | for (int i = 0; i < _templateDirectory.length; i++) |
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{ |
229 | 0 | String dir = _templateDirectory[i]; |
230 | 0 | File tFile = new File(dir, fileName); |
231 | 0 | if (tFile.canRead()) |
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{ |
233 | 0 | _log.debug("TemplateProvider: Found " + fileName + " in " + dir); |
234 | 0 | return tFile; |
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} |
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} |
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} |
238 | 57 | return null; |
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} |
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} |
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