/* ------------------------------------------------------------ */ private void shrinkCache() { // While we need to shrink while (_cache.size() > 0 && (_cachedFiles.get() > _maxCachedFiles || _cachedSize.get() > _maxCacheSize)) { // Scan the entire cache and generate an ordered list by last accessed time. SortedSet<CachedHttpContent> sorted = new TreeSet<CachedHttpContent>( new Comparator<CachedHttpContent>() { public int compare(CachedHttpContent c1, CachedHttpContent c2) { if (c1._lastAccessed < c2._lastAccessed) return -1; if (c1._lastAccessed > c2._lastAccessed) return 1; if (c1._contentLengthValue < c2._contentLengthValue) return -1; return c1._key.compareTo(c2._key); } }); for (CachedHttpContent content : _cache.values()) sorted.add(content); // Invalidate least recently used first for (CachedHttpContent content : sorted) { if (_cachedFiles.get() <= _maxCachedFiles && _cachedSize.get() <= _maxCacheSize) break; if (content == _cache.remove(content.getKey())) content.invalidate(); } } }
/* ------------------------------------------------------------ */ public void flushCache() { if (_cache != null) { while (_cache.size() > 0) { for (String path : _cache.keySet()) { CachedHttpContent content = _cache.remove(path); if (content != null) content.invalidate(); } } } }
/* ------------------------------------------------------------ */ private HttpContent load(String pathInContext, Resource resource, int maxBufferSize) throws IOException { if (resource == null || !resource.exists()) return null; if (resource.isDirectory()) return new ResourceHttpContent( resource, _mimeTypes.getMimeByExtension(resource.toString()), getMaxCachedFileSize()); // Will it fit in the cache? if (isCacheable(resource)) { CachedHttpContent content = null; // Look for a gzip resource if (_gzip) { String pathInContextGz = pathInContext + ".gz"; CachedHttpContent contentGz = _cache.get(pathInContextGz); if (contentGz == null || !contentGz.isValid()) { contentGz = null; Resource resourceGz = _factory.getResource(pathInContextGz); if (resourceGz.exists() && resourceGz.lastModified() >= resource.lastModified() && resourceGz.length() < resource.length()) { contentGz = new CachedHttpContent(pathInContextGz, resourceGz, null); CachedHttpContent added = _cache.putIfAbsent(pathInContextGz, contentGz); if (added != null) { contentGz.invalidate(); contentGz = added; } } } content = new CachedHttpContent(pathInContext, resource, contentGz); } else content = new CachedHttpContent(pathInContext, resource, null); // Add it to the cache. CachedHttpContent added = _cache.putIfAbsent(pathInContext, content); if (added != null) { content.invalidate(); content = added; } return content; } // Look for non Cacheable gzip resource or content String mt = _mimeTypes.getMimeByExtension(pathInContext); if (_gzip) { // Is the gzip content cached? String pathInContextGz = pathInContext + ".gz"; CachedHttpContent contentGz = _cache.get(pathInContextGz); if (contentGz != null && contentGz.isValid() && contentGz.getResource().lastModified() >= resource.lastModified()) return new ResourceHttpContent(resource, mt, maxBufferSize, contentGz); // Is there a gzip resource? Resource resourceGz = _factory.getResource(pathInContextGz); if (resourceGz.exists() && resourceGz.lastModified() >= resource.lastModified() && resourceGz.length() < resource.length()) return new ResourceHttpContent( resource, mt, maxBufferSize, new ResourceHttpContent( resourceGz, _mimeTypes.getMimeByExtension(pathInContextGz), maxBufferSize)); } return new ResourceHttpContent(resource, mt, maxBufferSize); }