Examples with TxnLogEntry org.apache.zookeeper.server.TxnLogEntry used on opensource projects

Example 6 with TxnLogEntry

use of org.apache.zookeeper.server.TxnLogEntry in project zookeeper by apache.

the class TxnLogToolkit method printTxn.

private void printTxn(byte[] bytes, String prefix) throws IOException {
    TxnLogEntry logEntry = SerializeUtils.deserializeTxn(bytes);
    TxnHeader hdr = logEntry.getHeader();
    Record txn = logEntry.getTxn();
    String txnStr = getFormattedTxnStr(txn);
    String txns = String.format("%s session 0x%s cxid 0x%s zxid 0x%s %s %s", DateFormat.getDateTimeInstance(DateFormat.SHORT, DateFormat.LONG).format(new Date(hdr.getTime())), Long.toHexString(hdr.getClientId()), Long.toHexString(hdr.getCxid()), Long.toHexString(hdr.getZxid()), Request.op2String(hdr.getType()), txnStr);
    if (prefix != null && !"".equals(prefix.trim())) {
        System.out.print(prefix + " - ");
    }
    if (txns.endsWith("\n")) {
        System.out.print(txns);
    } else {
        System.out.println(txns);
    }
}

Example 7 with TxnLogEntry

use of org.apache.zookeeper.server.TxnLogEntry in project zookeeper by apache.

the class Follower method processPacket.

/**
 * Examine the packet received in qp and dispatch based on its contents.
 * @param qp
 * @throws IOException
 */
protected void processPacket(QuorumPacket qp) throws Exception {
    switch(qp.getType()) {
        case Leader.PING:
            ping(qp);
            break;
        case Leader.PROPOSAL:
            ServerMetrics.getMetrics().LEARNER_PROPOSAL_RECEIVED_COUNT.add(1);
            TxnLogEntry logEntry = SerializeUtils.deserializeTxn(qp.getData());
            TxnHeader hdr = logEntry.getHeader();
            Record txn = logEntry.getTxn();
            TxnDigest digest = logEntry.getDigest();
            if (hdr.getZxid() != lastQueued + 1) {
                LOG.warn("Got zxid 0x{} expected 0x{}", Long.toHexString(hdr.getZxid()), Long.toHexString(lastQueued + 1));
            }
            lastQueued = hdr.getZxid();
            if (hdr.getType() == OpCode.reconfig) {
                SetDataTxn setDataTxn = (SetDataTxn) txn;
                QuorumVerifier qv = self.configFromString(new String(setDataTxn.getData(), UTF_8));
                self.setLastSeenQuorumVerifier(qv, true);
            }
            fzk.logRequest(hdr, txn, digest);
            if (hdr != null) {
                /*
                 * Request header is created only by the leader, so this is only set
                 * for quorum packets. If there is a clock drift, the latency may be
                 * negative. Headers use wall time, not CLOCK_MONOTONIC.
                 */
                long now = Time.currentWallTime();
                long latency = now - hdr.getTime();
                if (latency >= 0) {
                    ServerMetrics.getMetrics().PROPOSAL_LATENCY.add(latency);
                }
            }
            if (om != null) {
                final long startTime = Time.currentElapsedTime();
                om.proposalReceived(qp);
                ServerMetrics.getMetrics().OM_PROPOSAL_PROCESS_TIME.add(Time.currentElapsedTime() - startTime);
            }
            break;
        case Leader.COMMIT:
            ServerMetrics.getMetrics().LEARNER_COMMIT_RECEIVED_COUNT.add(1);
            fzk.commit(qp.getZxid());
            if (om != null) {
                final long startTime = Time.currentElapsedTime();
                om.proposalCommitted(qp.getZxid());
                ServerMetrics.getMetrics().OM_COMMIT_PROCESS_TIME.add(Time.currentElapsedTime() - startTime);
            }
            break;
        case Leader.COMMITANDACTIVATE:
            // get the new configuration from the request
            Request request = fzk.pendingTxns.element();
            SetDataTxn setDataTxn = (SetDataTxn) request.getTxn();
            QuorumVerifier qv = self.configFromString(new String(setDataTxn.getData(), UTF_8));
            // get new designated leader from (current) leader's message
            ByteBuffer buffer = ByteBuffer.wrap(qp.getData());
            long suggestedLeaderId = buffer.getLong();
            final long zxid = qp.getZxid();
            boolean majorChange = self.processReconfig(qv, suggestedLeaderId, zxid, true);
            // commit (writes the new config to ZK tree (/zookeeper/config)
            fzk.commit(zxid);
            if (om != null) {
                om.informAndActivate(zxid, suggestedLeaderId);
            }
            if (majorChange) {
                throw new Exception("changes proposed in reconfig");
            }
            break;
        case Leader.UPTODATE:
            LOG.error("Received an UPTODATE message after Follower started");
            break;
        case Leader.REVALIDATE:
            if (om == null || !om.revalidateLearnerSession(qp)) {
                revalidate(qp);
            }
            break;
        case Leader.SYNC:
            fzk.sync();
            break;
        default:
            LOG.warn("Unknown packet type: {}", LearnerHandler.packetToString(qp));
            break;
    }
}