/** Returns a JarDiff for the given request */ public synchronized DownloadResponse getJarDiffEntry( ResourceCatalog catalog, DownloadRequest dreq, JnlpResource res) { if (dreq.getCurrentVersionId() == null) return null; // check whether the request is from javaws 1.0/1.0.1 // do not generate minimal jardiff if it is from 1.0/1.0.1 boolean doJarDiffWorkAround = isJavawsVersion(dreq, "1.0*"); // First do a lookup to find a match JarDiffKey key = new JarDiffKey( res.getName(), dreq.getCurrentVersionId(), res.getReturnVersionId(), !doJarDiffWorkAround); JarDiffEntry entry = (JarDiffEntry) _jarDiffEntries.get(key); // If entry is not found, then the querty has not been made. if (entry == null) { if (_log.isInformationalLevel()) { _log.addInformational( "servlet.log.info.jardiff.gen", res.getName(), dreq.getCurrentVersionId(), res.getReturnVersionId()); } File f = generateJarDiff(catalog, dreq, res, doJarDiffWorkAround); if (f == null) { _log.addWarning( "servlet.log.warning.jardiff.failed", res.getName(), dreq.getCurrentVersionId(), res.getReturnVersionId()); } // Store entry in table entry = new JarDiffEntry(f); _jarDiffEntries.put(key, entry); } // Check for no JarDiff to return if (entry.getJarDiffFile() == null) { return null; } else { return DownloadResponse.getFileDownloadResponse( entry.getJarDiffFile(), _jarDiffMimeType, entry.getJarDiffFile().lastModified(), res.getReturnVersionId()); } }