/* ------------------------------------------------------------ */
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();
}
}
}
}
CachedGzipHttpContent(CachedHttpContent content, CachedHttpContent contentGz) {
super(content, contentGz);
_content = content;
_contentGz = contentGz;
_etag =
(ResourceCache.this._etags)
? new PreEncodedHttpField(
HttpHeader.ETAG, _content.getResource().getWeakETag("--gzip"))
: null;
}
public boolean isValid() {
return _contentGz.isValid()
&& _content.isValid()
&& _content.getResource().lastModified() <= _contentGz.getResource().lastModified();
}
/* ------------------------------------------------------------ */
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);
}
