protected <T, C extends Connection<T>> T acquire(C connection) {
String errorMessage = String.format("(%s) error acquiring %s", toString(), connection);
for (int i = 0; i < sshRetries; i++) {
try {
connection.clear();
logger.debug(">> (%s) acquiring %s", toString(), connection);
T returnVal = connection.create();
logger.debug("<< (%s) acquired %s", toString(), returnVal);
return returnVal;
} catch (Exception from) {
try {
connection.clear();
} catch (Exception e1) {
logger.warn(from, "<< (%s) error closing connection", toString());
}
if (i + 1 == sshRetries) {
logger.error(from, "<< " + errorMessage + ": out of retries %d", sshRetries);
throw propagate(from, errorMessage);
} else if (Throwables2.getFirstThrowableOfType(from, IllegalStateException.class) != null) {
logger.warn(from, "<< " + errorMessage + ": " + from.getMessage());
disconnect();
backoffForAttempt(i + 1, errorMessage + ": " + from.getMessage());
connect();
continue;
} else if (shouldRetry(from)) {
logger.warn(from, "<< " + errorMessage + ": " + from.getMessage());
backoffForAttempt(i + 1, errorMessage + ": " + from.getMessage());
continue;
} else {
logger.error(from, "<< " + errorMessage + ": exception not retryable");
throw propagate(from, errorMessage);
}
}
}
assert false : "should not reach here";
return null;
}
