/**
* read a packet from the leader
*
* @param pp the packet to be instantiated
* @throws IOException
*/
void readPacket(QuorumPacket pp) throws IOException {
synchronized (leaderIs) {
leaderIs.readRecord(pp, "packet");
}
long traceMask = ZooTrace.SERVER_PACKET_TRACE_MASK;
if (pp.getType() == Leader.PING) {
traceMask = ZooTrace.SERVER_PING_TRACE_MASK;
}
if (LOG.isTraceEnabled()) {
ZooTrace.logQuorumPacket(LOG, traceMask, 'i', pp);
}
}
/**
* validate a session for a client
*
* @param clientId the client to be revalidated
* @param timeout the timeout for which the session is valid
* @return
* @throws IOException
*/
void validateSession(ServerCnxn cnxn, long clientId, int timeout) throws IOException {
LOG.info("Revalidating client: 0x" + Long.toHexString(clientId));
ByteArrayOutputStream baos = new ByteArrayOutputStream();
DataOutputStream dos = new DataOutputStream(baos);
dos.writeLong(clientId);
dos.writeInt(timeout);
dos.close();
QuorumPacket qp = new QuorumPacket(Leader.REVALIDATE, -1, baos.toByteArray());
pendingRevalidations.put(clientId, cnxn);
if (LOG.isTraceEnabled()) {
ZooTrace.logTraceMessage(
LOG, ZooTrace.SESSION_TRACE_MASK, "To validate session 0x" + Long.toHexString(clientId));
}
writePacket(qp, true);
}
protected void revalidate(QuorumPacket qp) throws IOException {
ByteArrayInputStream bis = new ByteArrayInputStream(qp.getData());
DataInputStream dis = new DataInputStream(bis);
long sessionId = dis.readLong();
boolean valid = dis.readBoolean();
ServerCnxn cnxn = pendingRevalidations.remove(sessionId);
if (cnxn == null) {
LOG.warn("Missing session 0x" + Long.toHexString(sessionId) + " for validation");
} else {
zk.finishSessionInit(cnxn, valid);
}
if (LOG.isTraceEnabled()) {
ZooTrace.logTraceMessage(
LOG,
ZooTrace.SESSION_TRACE_MASK,
"Session 0x" + Long.toHexString(sessionId) + " is valid: " + valid);
}
}