public long getSequenceNumber() {
        return sequenceNumber;
    }

    /**
     * Sets the sequence number.
     *
     * @param sequenceNumber the sequence number
     */
    public void setSequenceNumber(long sequenceNumber) {
        this.sequenceNumber = sequenceNumber;
    }

    /**
     * Gets the context handle.
     *
     * @return the context handle
     */
    public byte[] getContextHandle() {

    public long getSequenceNumber() {
        return sequenceNumber;
    }

    /**
     * Sets the sequence number.
     *
     * @param sequenceNumber the sequence number
     */
    public void setSequenceNumber(long sequenceNumber) {
        this.sequenceNumber = sequenceNumber;
    }

    /**
     * Gets the return code.
     *
     * @return the return code
     */
    public int getReturnCode() {

            // Create and populate the RPC message
            WitnessHeartbeatMessage message = new WitnessHeartbeatMessage();
            message.setContextHandle(request.getContextHandle());
            message.setSequenceNumber(request.getSequenceNumber());

            // Send the RPC request
            rpcHandle.sendrecv(message);

            // Create response from RPC message results

    /**
     * Sets the sequence number for this heartbeat.
     * The sequence number should be incremented for each heartbeat request.
     *
     * @param sequenceNumber the sequence number
     */
    public void setSequenceNumber(long sequenceNumber) {
        this.sequenceNumber = sequenceNumber;
    }

    /**
     * Gets the sequence number.
     *
     * @return the sequence number
     */
    public long getSequenceNumber() {

        try {
            WitnessHeartbeatRequest request = new WitnessHeartbeatRequest();
            request.setRegistrationId(registration.getRegistrationId());
            request.setSequenceNumber(registration.getNextSequenceNumber());

            WitnessHeartbeatResponse response = rpcClient.heartbeat(request);

            if (response != null && response.isSuccess()) {

        try {
            WitnessHeartbeatRequest request = new WitnessHeartbeatRequest();
            request.setRegistrationId(registration.getRegistrationId());
            request.setSequenceNumber(registration.getNextSequenceNumber());
            
            WitnessHeartbeatResponse response = rpcClient.heartbeat(request);
            
            if (response.isSuccess()) {