/** An exceptionally crude implementation of Mailbox relying on POSIXy filesystem semantics */
public class FileBasedMailbox extends Mailbox.Default {
+ public static final long MAGIC_DATE = 0;
+
public String toString() { return "[FileBasedMailbox " + path.getAbsolutePath() + "]"; }
private static final char slash = File.separatorChar;
private static final WeakHashMap<String,FileBasedMailbox> instances = new WeakHashMap<String,FileBasedMailbox>();
public static class Cache implements Serializable {
public final int uidValidity = new Random().nextInt();
private final Hashtable<String,Entry> byname = new Hashtable<String,Entry>();
- private transient final Hashtable<Integer,Entry> byuid = new Hashtable<Integer,Entry>();
+ private final Hashtable<Integer,Entry> byuid = new Hashtable<Integer,Entry>();
+ private final ArrayList<Entry> linear = new ArrayList<Entry>();
public final File dir;
private int uidNext = 0;
public Cache(File dir) { this.dir = dir; }
- public void init(Prevayler prevayler) throws IOException {
+ public void init(final Prevayler prevayler) throws IOException {
dir.mkdirs();
- Log.info(this, "initializing maildir " + dir.getAbsolutePath());
+ Log.info(this, "initializing maildir " + dir.getParent());
boolean invalid = false;
- for(String s : byname.keySet()) create(prevayler, s);
+ ArrayList<Transaction> kill = new ArrayList<Transaction>();
+ for(String s : byname.keySet()) {
+ String name = dir.getParent() + slash + s;
+ if (!new File(name).exists() && !new File(name+"s").exists()) {
+ Log.error(this, "dropping message " + name);
+ kill.add(new Drop(byname.get(s).uid()));
+ }
+ }
+ for(Transaction t : kill) prevayler.execute(t);
for(String file : new File(dir.getParent()).list())
- if (file.charAt(0)!='.' && !(new File(dir.getAbsolutePath() + slash + file).isDirectory()))
- create(prevayler, file);
- Log.info(this, " done initializing maildir " + dir.getAbsolutePath());
- prevayler.takeSnapshot();
- }
-
- public synchronized void create(Prevayler prevayler, String name) throws IOException {
- if (get(name) != null) return;
- new Entry(this, prevayler, name);
+ if (file.charAt(0)!='.' && !(new File(dir.getParent() + slash + file).isDirectory())) {
+ if (get(file) == null) new Entry(this, prevayler, file);
+ else if ((new File(dir.getParent() + slash + file).lastModified() == MAGIC_DATE) != get(file).seen())
+ prevayler.execute(new Seen(get(file).uid(), !get(file).seen()));
+ }
+ Log.info(this, " done initializing maildir " + dir.getParent());
+ new Thread() { public void run() {
+ try { prevayler.takeSnapshot(); } catch (Exception e) { Log.error(this, e); }
+ } }.start();
}
- public synchronized int size() { return byname.size(); }
+
+ public synchronized int size() { return linear.size(); }
public synchronized int uidNext(boolean increment) { return increment ? uidNext++ : uidNext; }
public synchronized Entry get(int uid) { return byuid.get(uid); }
- public synchronized Entry get(String name) { return byname.get(name); }
+ public synchronized Entry getLinear(int num) { return linear.get(num); }
+ public synchronized Entry get(String name) {
+ if (name.endsWith("s")) name = name.substring(0, name.length() - 1);
+ return byname.get(name);
+ }
public static class Entry implements Serializable {
- public final MIME.Headers headers;
+ private final byte[] header;
public final String name;
private int uid;
private boolean seen;
+ public MIME.Headers headers() { return new MIME.Headers(new Stream(new ByteArrayInputStream(header)), true); }
public Entry(Cache cache, Prevayler prevayler, String name) throws IOException {
- seen = name.endsWith(".s");
- this.name = seen ? name.substring(0, name.length() - 2) : name;
- headers = new MIME.Headers(new Stream(new FileInputStream(cache.dir.getAbsolutePath()+slash+name)), true);
+ File f = new File(cache.dir.getParent()+slash+name);
+ final boolean seen = f.lastModified() == MAGIC_DATE;
+ this.name = name;
+ header = new MIME.Headers(new Stream(new FileInputStream(f)), true).toString().getBytes();
prevayler.execute(new Transaction() {
public void executeOn(Object o, Date now) {
Cache cache = (Cache)o;
synchronized(cache) {
+ Entry.this.seen = seen;
Entry.this.uid = cache.uidNext(true);
+ cache.linear.add(Entry.this);
cache.byuid.put(Entry.this.uid, Entry.this);
cache.byname.put(Entry.this.name, Entry.this);
} } });
public int uid() { return uid; }
public boolean seen() { return seen; }
public void seen(Cache cache, boolean seen) {
- String base = cache.dir.getAbsolutePath() + slash + name;
- File target = new File(base + (seen?".s":""));
- if (target.exists()) return;
- new File(base + (seen?"":".s")).renameTo(target);
+ String base = cache.dir.getParent() + slash + name;
+ File target = new File(base);
+ if (!target.exists()) target = new File(base + "s");
+ target.setLastModified(seen ? MAGIC_DATE : System.currentTimeMillis());
}
public void delete(Cache cache) {
- String base = cache.dir.getAbsolutePath() + slash + name;
+ String base = cache.dir.getParent() + slash + name;
File target = new File(base);
- if (!target.exists()) target = new File(base + ".s");
+ if (!target.exists()) target = new File(base + "s");
if (target.exists()) target.delete();
}
public Message message(Cache cache) { try {
- String base = cache.dir.getAbsolutePath() + slash + name;
+ String base = cache.dir.getParent() + slash + name;
File target = new File(base);
- if (!target.exists()) target = new File(base + ".s");
+ if (!target.exists()) target = new File(base + "s");
FileInputStream fis = null;
try {
fis = new FileInputStream(target);
public synchronized void add(Message message, int flags) {
Log.info(path, message.summary());
try {
- final String name = path.getAbsolutePath() + slash + cache.uidNext(true) + "." +
- ((flags & Mailbox.Flag.SEEN) == Mailbox.Flag.SEEN ? "s" : "");
- File target = new File(name);
- File f = new File(target.getCanonicalPath() + "-");
- if (f.exists() || target.exists())
- throw new RuntimeException("aieeee!!!! target of add() already exists: " + target.getAbsolutePath());
+ String name; String fullname; File target; File f;
+ while(true) {
+ name = cache.uidNext(true) + ".";
+ fullname = path.getAbsolutePath() + slash + name;
+ target = new File(fullname);
+ f = new File(target.getCanonicalPath() + "-");
+ if (!f.exists() && !target.exists()) break;
+ Log.error(this, "aieeee!!!! target of add() already exists: " + target.getAbsolutePath());
+ }
FileOutputStream fo = new FileOutputStream(f);
Stream stream = new Stream(fo);
if (message.envelope != null) {
}
message.dump(stream);
fo.close();
- f.renameTo(new File(name));
+ f.renameTo(new File(fullname));
+ if ((flags & Mailbox.Flag.SEEN) == Mailbox.Flag.SEEN) f.setLastModified(MAGIC_DATE);
new Cache.Entry(cache, prevayler, name);
} catch (IOException e) { throw new MailException.IOException(e); }
}
- private class Iterator extends Mailbox.Default.Iterator implements Serializable {
+ private class Iterator extends Mailbox.Default.Iterator {
int cur = -1;
- private Cache.Entry entry() { return cache.get(cur); }
- public MIME.Headers head() { return done() ? null : entry().headers; }
+ private Cache.Entry entry() { return cache.getLinear(cur); }
+ public MIME.Headers head() { return done() ? null : entry().headers(); }
public boolean done() { return cur >= cache.size(); }
public boolean next() { cur++; return !done(); }
public boolean seen() { return done() ? false : entry().seen(); }
public int num() { return cur+1; } // EUDORA insists that message numbers start at 1, not 0
public int uid() { return done() ? -1 : entry().uid(); }
public Message cur() { return done() ? null : entry().message(cache); }
- public void seen(final boolean seen) {
- if (done()) return;
- final int cur = this.cur;
- prevayler.execute(new Transaction() {
- public void executeOn(Object c, Date d) {
- ((Cache)c).get(cur).seen((Cache)c, seen); } });
+ public void seen(boolean seen) {
+ entry().seen((Cache)prevayler.prevalentSystem(), seen);
+ prevayler.execute(new Seen(uid(), seen));
}
public void delete() {
- if (done()) return;
- final int cur = this.cur;
- prevayler.execute(new Transaction() {
- public void executeOn(Object c, Date d) {
- ((Cache)c).get(cur).delete((Cache)c); } });
- }
+ entry().delete((Cache)prevayler.prevalentSystem());
+ prevayler.execute(new Drop(entry().uid()));
+ }
+ }
+
+ private static class Seen implements Transaction {
+ private int uid;
+ private boolean seen;
+ public Seen(int uid, boolean seen) { this.uid = uid; this.seen = seen; }
+ public void executeOn(Object c, Date d) { ((Cache)c).get(uid).seen = seen; }
+ }
+ public static class Drop implements Transaction {
+ int uid;
+ public Drop(int uid) { this.uid = uid; }
+ public void executeOn(Object o, Date now) {
+ Cache c = (Cache)o;
+ Cache.Entry e = c.get(uid);
+ c.byname.remove(e.name);
+ c.linear.remove(e);
+ c.byuid.remove(uid);
+ }
}
}
projects / org.ibex.mail.git / blobdiff