/** Save the contents of the FS image */
void saveFSImage(File fullimage, File edits) throws IOException {
File curFile = new File(fullimage, FS_IMAGE);
File newFile = new File(fullimage, NEW_FS_IMAGE);
File oldFile = new File(fullimage, OLD_FS_IMAGE);
//
// Write out data
//
DataOutputStream out =
new DataOutputStream(new BufferedOutputStream(new FileOutputStream(newFile)));
try {
out.writeInt(rootDir.numItemsInTree() - 1);
rootDir.saveImage("", out);
} finally {
out.close();
}
//
// Atomic move sequence
//
// 1. Move cur to old
curFile.renameTo(oldFile);
// 2. Move new to cur
newFile.renameTo(curFile);
// 3. Remove pending-edits file (it's been integrated with newFile)
edits.delete();
// 4. Delete old
oldFile.delete();
}
int numItemsInTree() {
int total = 0;
for (Iterator it = children.values().iterator(); it.hasNext(); ) {
INode child = (INode) it.next();
total += child.numItemsInTree();
}
return total + 1;
}