/**
* Returns +1 (last connection attempt was a success), 0 (no connection attempts), or -1 (last
* connection attempt was a failure).
*/
private int connectScore() {
if (connectSuccesses.isEmpty() && connectFailures.isEmpty()) return 0; // no attempts
else if (connectSuccesses.isEmpty()) return -1; // only failures
else if (connectFailures.isEmpty()) return 1; // only successes
else {
long success = ((Long) connectSuccesses.last()).longValue();
long failure = ((Long) connectFailures.last()).longValue();
// Can't use success-failure because of overflow/underflow.
if (success > failure) return 1;
else if (success < failure) return -1;
else return 0;
}
}
private void recordConnectionAttempt(Buffer buf, long now) {
if (buf.isEmpty()) {
// a) No attempts; just add it.
buf.addFirst(new Long(now));
} else if (now - ((Long) buf.first()).longValue() >= WINDOW_TIME) {
// b) Attempt more than WINDOW_TIME milliseconds ago. Add.
buf.addFirst(new Long(now));
} else {
// c) Attempt within WINDOW_TIME. Coalesce.
buf.removeFirst();
buf.addFirst(new Long(now));
}
}
/**
* Returns the last few times we successfully connected to this.
*
* @return an Iterator of system times in milliseconds, each as a Long, in descending order.
*/
public Iterator /* Long */ getConnectionFailures() {
return connectFailures.iterator();
}
/**
* Returns the last few times we successfully connected to this.
*
* @return an Iterator of system times in milliseconds, each as a Long, in descending order.
*/
public Iterator /* Long */ getConnectionSuccesses() {
return connectSuccesses.iterator();
}