List of usage examples for org.apache.commons.compress.archivers.tar TarArchiveInputStream available
public int available() throws IOException
From source file:org.xenmaster.setup.debian.Bootstrapper.java
protected boolean downloadNetbootFiles() { if (System.currentTimeMillis() - lastChecked < 50 * 60 * 1000) { return false; }/*from ww w. j a v a 2 s . co m*/ File localVersionFile = new File(Settings.getInstance().getString("StorePath") + "/netboot/version"); int localVersion = -1; try (FileInputStream fis = new FileInputStream(localVersionFile)) { localVersion = Integer.parseInt(IOUtils.toString(fis)); } catch (IOException | NumberFormatException ex) { Logger.getLogger(getClass()).error("Failed to retrieve local version file", ex); } int remoteVersion = -1; try { remoteVersion = Integer.parseInt(IOUtils.toString(XenMasterSite.getFileAsStream("/netboot/version"))); } catch (IOException | NumberFormatException ex) { Logger.getLogger(getClass()).error("Failed to retrieve remote version file", ex); } lastChecked = System.currentTimeMillis(); if (localVersion < remoteVersion) { Logger.getLogger(getClass()) .info("New version " + remoteVersion + " found. Please hold while downloading netboot data"); try { TarArchiveInputStream tais = new TarArchiveInputStream( new GZIPInputStream(XenMasterSite.getFileAsStream("/netboot/netboot.tar.gz"))); TarArchiveEntry tae = null; FileOutputStream fos = null; while ((tae = tais.getNextTarEntry()) != null) { if (tais.canReadEntryData(tae)) { String target = Settings.getInstance().getString("StorePath") + "/" + tae.getName(); if (tae.isSymbolicLink()) { Path targetFile = FileSystems.getDefault().getPath(tae.getLinkName()); Path linkName = FileSystems.getDefault().getPath(target); // Link might already have been written as null file if (targetFile.toFile().exists()) { targetFile.toFile().delete(); } Files.createSymbolicLink(linkName, targetFile); Logger.getLogger(getClass()).info( "Created sym link " + linkName.toString() + " -> " + targetFile.toString()); } else if (tae.isDirectory()) { new File(target).mkdir(); Logger.getLogger(getClass()).info("Created dir " + target); } else if (tae.isFile()) { fos = new FileOutputStream(target); byte[] b = new byte[1024]; int curPos = 0; while (tais.available() > 0) { tais.read(b, curPos, 1024); fos.write(b, curPos, 1024); } fos.flush(); fos.close(); Logger.getLogger(getClass()).info("Wrote file " + target); } } } tais.close(); // Write local version IOUtils.write("" + remoteVersion, new FileOutputStream(localVersionFile)); } catch (IOException ex) { Logger.getLogger(getClass()).error("Failed to download netboot files", ex); } } else { return false; } return true; }