| /* |
| 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.wiki.render; |
| |
| import net.sf.ehcache.Cache; |
| import net.sf.ehcache.CacheManager; |
| import net.sf.ehcache.Element; |
| import org.apache.log4j.Logger; |
| import org.apache.wiki.WikiContext; |
| import org.apache.wiki.WikiEngine; |
| import org.apache.wiki.api.exceptions.ProviderException; |
| import org.apache.wiki.api.exceptions.WikiException; |
| import org.apache.wiki.attachment.Attachment; |
| import org.apache.wiki.event.WikiEvent; |
| import org.apache.wiki.event.WikiEventListener; |
| import org.apache.wiki.event.WikiEventUtils; |
| import org.apache.wiki.event.WikiPageEvent; |
| import org.apache.wiki.pages.PageManager; |
| import org.apache.wiki.parser.JSPWikiMarkupParser; |
| import org.apache.wiki.parser.MarkupParser; |
| import org.apache.wiki.parser.WikiDocument; |
| import org.apache.wiki.providers.WikiPageProvider; |
| import org.apache.wiki.util.ClassUtil; |
| import org.apache.wiki.util.TextUtil; |
| |
| import java.io.IOException; |
| import java.io.StringReader; |
| import java.lang.reflect.Constructor; |
| import java.util.Collection; |
| import java.util.Properties; |
| |
| |
| /** |
| * This class provides a facade towards the differing rendering routines. You should use the routines in this manager |
| * instead of the ones in WikiEngine, if you don't want the different side effects to occur - such as WikiFilters. |
| * <p> |
| * This class also manages a rendering cache, i.e. documents are stored between calls. You may control the cache by |
| * tweaking the ehcache.xml file. |
| * <p> |
| * |
| * @since 2.4 |
| */ |
| public class DefaultRenderingManager implements RenderingManager { |
| |
| private static final Logger log = Logger.getLogger( DefaultRenderingManager.class ); |
| |
| private final int m_cacheExpiryPeriod = 24*60*60; // This can be relatively long |
| private final CacheManager m_cacheManager = CacheManager.getInstance(); |
| |
| private WikiEngine m_engine; |
| private boolean m_useCache = true; |
| /** If true, all titles will be cleaned. */ |
| private boolean m_beautifyTitle = false; |
| |
| /** The capacity of the caches, if you want something else, tweak ehcache.xml. */ |
| private static final int DEFAULT_CACHESIZE = 1_000; |
| private static final String VERSION_DELIMITER = "::"; |
| |
| /** The name of the default renderer. */ |
| private static final String DEFAULT_PARSER = JSPWikiMarkupParser.class.getName(); |
| /** The name of the default renderer. */ |
| private static final String DEFAULT_RENDERER = XHTMLRenderer.class.getName(); |
| /** The name of the default WYSIWYG renderer. */ |
| private static final String DEFAULT_WYSIWYG_RENDERER = WysiwygEditingRenderer.class.getName(); |
| |
| /** Stores the WikiDocuments that have been cached. */ |
| private Cache m_documentCache; |
| |
| private Constructor< ? > m_rendererConstructor; |
| private Constructor< ? > m_rendererWysiwygConstructor; |
| private String m_markupParserClass = DEFAULT_PARSER; |
| |
| /** |
| * {@inheritDoc} |
| */ |
| @Override |
| public void initialize( final WikiEngine engine, final Properties properties ) throws WikiException { |
| m_engine = engine; |
| m_markupParserClass = properties.getProperty( PROP_PARSER, DEFAULT_PARSER ); |
| if( !ClassUtil.assignable( m_markupParserClass, MarkupParser.class.getName() ) ) { |
| log.warn( m_markupParserClass + " does not subclass " + MarkupParser.class.getName() + " reverting to default markup parser." ); |
| m_markupParserClass = DEFAULT_PARSER; |
| } |
| log.info( "Using " + m_markupParserClass + " as markup parser." ); |
| |
| m_useCache = "true".equals( properties.getProperty( PageManager.PROP_USECACHE ) ); |
| m_beautifyTitle = TextUtil.getBooleanProperty( properties, PROP_BEAUTIFYTITLE, m_beautifyTitle ); |
| |
| if( m_useCache ) { |
| final String documentCacheName = engine.getApplicationName() + "." + DOCUMENTCACHE_NAME; |
| if (m_cacheManager.cacheExists(documentCacheName)) { |
| m_documentCache = m_cacheManager.getCache(documentCacheName); |
| } else { |
| log.info( "cache with name " + documentCacheName + " not found in ehcache.xml, creating it with defaults." ); |
| m_documentCache = new Cache( documentCacheName, DEFAULT_CACHESIZE, false, false, m_cacheExpiryPeriod, m_cacheExpiryPeriod ); |
| m_cacheManager.addCache( m_documentCache ); |
| } |
| } |
| |
| final String renderImplName = properties.getProperty( PROP_RENDERER, DEFAULT_RENDERER ); |
| final String renderWysiwygImplName = properties.getProperty( PROP_WYSIWYG_RENDERER, DEFAULT_WYSIWYG_RENDERER ); |
| |
| final Class< ? >[] rendererParams = { WikiContext.class, WikiDocument.class }; |
| m_rendererConstructor = initRenderer( renderImplName, rendererParams ); |
| m_rendererWysiwygConstructor = initRenderer( renderWysiwygImplName, rendererParams ); |
| |
| log.info( "Rendering content with " + renderImplName + "." ); |
| |
| WikiEventUtils.addWikiEventListener(m_engine, WikiPageEvent.POST_SAVE_BEGIN, this); |
| } |
| |
| private Constructor< ? > initRenderer( final String renderImplName, final Class< ? >[] rendererParams ) throws WikiException { |
| Constructor< ? > c = null; |
| try { |
| final Class< ? > clazz = Class.forName( renderImplName ); |
| c = clazz.getConstructor( rendererParams ); |
| } catch( final ClassNotFoundException e ) { |
| log.error( "Unable to find WikiRenderer implementation " + renderImplName ); |
| } catch( final SecurityException e ) { |
| log.error( "Unable to access the WikiRenderer(WikiContext,WikiDocument) constructor for " + renderImplName ); |
| } catch( final NoSuchMethodException e ) { |
| log.error( "Unable to locate the WikiRenderer(WikiContext,WikiDocument) constructor for " + renderImplName ); |
| } |
| if( c == null ) { |
| throw new WikiException( "Failed to get WikiRenderer '" + renderImplName + "'." ); |
| } |
| return c; |
| } |
| |
| /** |
| * {@inheritDoc} |
| */ |
| @Override |
| public String beautifyTitle( final String title ) { |
| if( m_beautifyTitle ) { |
| try { |
| final Attachment att = m_engine.getAttachmentManager().getAttachmentInfo( title ); |
| if( att == null ) { |
| return TextUtil.beautifyString( title ); |
| } |
| |
| final String parent = TextUtil.beautifyString( att.getParentName() ); |
| return parent + "/" + att.getFileName(); |
| } catch( final ProviderException e ) { |
| return title; |
| } |
| } |
| |
| return title; |
| } |
| |
| /** |
| * {@inheritDoc} |
| */ |
| @Override |
| public String beautifyTitleNoBreak( final String title ) { |
| if( m_beautifyTitle ) { |
| return TextUtil.beautifyString( title, " " ); |
| } |
| |
| return title; |
| } |
| |
| /** |
| * {@inheritDoc} |
| */ |
| @Override |
| public MarkupParser getParser( final WikiContext context, final String pagedata ) { |
| try { |
| return ClassUtil.getMappedObject( m_markupParserClass, context, new StringReader( pagedata ) ); |
| } catch( final ReflectiveOperationException | IllegalArgumentException e ) { |
| log.error( "unable to get an instance of " + m_markupParserClass + " (" + e.getMessage() + "), returning default markup parser.", e ); |
| return new JSPWikiMarkupParser( context, new StringReader( pagedata ) ); |
| } |
| } |
| |
| /** |
| * {@inheritDoc} |
| */ |
| @Override |
| // FIXME: The cache management policy is not very good: deleted/changed pages should be detected better. |
| public WikiDocument getRenderedDocument( final WikiContext context, final String pagedata ) { |
| final String pageid = context.getRealPage().getName() + VERSION_DELIMITER + |
| context.getRealPage().getVersion() + VERSION_DELIMITER + |
| context.getVariable( WikiContext.VAR_EXECUTE_PLUGINS ); |
| |
| if( useCache( context ) ) { |
| final Element element = m_documentCache.get( pageid ); |
| if ( element != null ) { |
| final WikiDocument doc = ( WikiDocument )element.getObjectValue(); |
| |
| // |
| // This check is needed in case the different filters have actually changed the page data. |
| // FIXME: Figure out a faster method |
| if( pagedata.equals( doc.getPageData() ) ) { |
| if( log.isDebugEnabled() ) { |
| log.debug( "Using cached HTML for page " + pageid ); |
| } |
| return doc; |
| } |
| } else if( log.isDebugEnabled() ) { |
| log.debug( "Re-rendering and storing " + pageid ); |
| } |
| } |
| |
| // Refresh the data content |
| try { |
| final MarkupParser parser = getParser( context, pagedata ); |
| final WikiDocument doc = parser.parse(); |
| doc.setPageData( pagedata ); |
| if( useCache( context ) ) { |
| m_documentCache.put( new Element( pageid, doc ) ); |
| } |
| return doc; |
| } catch( final IOException ex ) { |
| log.error( "Unable to parse", ex ); |
| } |
| |
| return null; |
| } |
| |
| boolean useCache( final WikiContext context ) { |
| return m_useCache && WikiContext.VIEW.equals( context.getRequestContext() ); |
| } |
| |
| /** |
| * {@inheritDoc} |
| */ |
| @Override |
| public String getHTML( final WikiContext context, final WikiDocument doc ) throws IOException { |
| final Boolean wysiwygVariable = ( Boolean )context.getVariable( WikiContext.VAR_WYSIWYG_EDITOR_MODE ); |
| final boolean wysiwygEditorMode; |
| if( wysiwygVariable != null ) { |
| wysiwygEditorMode = wysiwygVariable; |
| } else { |
| wysiwygEditorMode = false; |
| } |
| final WikiRenderer rend; |
| if( wysiwygEditorMode ) { |
| rend = getWysiwygRenderer( context, doc ); |
| } else { |
| rend = getRenderer( context, doc ); |
| } |
| |
| return rend.getString(); |
| } |
| |
| /** |
| * {@inheritDoc} |
| */ |
| @Override |
| public WikiRenderer getRenderer( final WikiContext context, final WikiDocument doc ) { |
| final Object[] params = { context, doc }; |
| return getRenderer( params, m_rendererConstructor ); |
| } |
| |
| /** |
| * {@inheritDoc} |
| */ |
| @Override |
| public WikiRenderer getWysiwygRenderer( final WikiContext context, final WikiDocument doc ) { |
| final Object[] params = { context, doc }; |
| return getRenderer( params, m_rendererWysiwygConstructor ); |
| } |
| |
| @SuppressWarnings("unchecked") |
| private < T extends WikiRenderer > T getRenderer( final Object[] params, final Constructor<?> rendererConstructor ) { |
| try { |
| return ( T )rendererConstructor.newInstance( params ); |
| } catch( final Exception e ) { |
| log.error( "Unable to create WikiRenderer", e ); |
| } |
| return null; |
| } |
| |
| /** |
| * {@inheritDoc} |
| * |
| * <p>Flushes the document cache in response to a POST_SAVE_BEGIN event. |
| * |
| * @see WikiEventListener#actionPerformed(WikiEvent) |
| */ |
| @Override |
| public void actionPerformed( final WikiEvent event ) { |
| log.debug( "event received: " + event.toString() ); |
| if( m_useCache ) { |
| if( ( event instanceof WikiPageEvent ) && ( event.getType() == WikiPageEvent.POST_SAVE_BEGIN ) ) { |
| if( m_documentCache != null ) { |
| final String pageName = ( ( WikiPageEvent ) event ).getPageName(); |
| m_documentCache.remove( pageName ); |
| final Collection< String > referringPages = m_engine.getReferenceManager().findReferrers( pageName ); |
| |
| // |
| // Flush also those pages that refer to this page (if an nonexistent page |
| // appears, we need to flush the HTML that refers to the now-existent page) |
| // |
| if( referringPages != null ) { |
| for( final String page : referringPages ) { |
| if( log.isDebugEnabled() ) { |
| log.debug( "Flushing latest version of " + page ); |
| } |
| // as there is a new version of the page expire both plugin and pluginless versions of the old page |
| m_documentCache.remove( page + VERSION_DELIMITER + WikiPageProvider.LATEST_VERSION + VERSION_DELIMITER + Boolean.FALSE ); |
| m_documentCache.remove( page + VERSION_DELIMITER + WikiPageProvider.LATEST_VERSION + VERSION_DELIMITER + Boolean.TRUE ); |
| m_documentCache.remove( page + VERSION_DELIMITER + WikiPageProvider.LATEST_VERSION + VERSION_DELIMITER + null ); |
| } |
| } |
| } |
| } |
| } |
| } |
| |
| } |
