Fgv with two types of variables

it goes something like this
i want the FGV to have a cluster of two 1D arrays of double (that will be the FGV variable). and the data that i'm "adding" is a double number/constant (whatever), this will be the added variable.
the main idea is that i want to be able to select to which one of the two i'm adding the additional number and i think it's pretty easy to accomplish with case structure and a simple boolean control (reference), that is what i've done.
the problem is that if i don't connect anything to the shift register of the FGV labview doesn't recognize it as the FGV variable i've described and if i do, it's an additional input which i don't want to use later.
in theory, i can make my additional variable to also be a cluster with two 1D arrays of type double within, however, since my input consists of only one number, i'm not sure how to accomplish it.
thanks in advance.
it would be good to know if something like this is even possible. (first option)
Solved!
Go to Solution.

I'm not sure what you are looking for.  Something like this?
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Attachments:
Two Array FGV.png ‏15 KB

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    [1307872315:455134][1282/1160603968] MASTER: /opt/bdb/ rep_process_message: msgv = 5 logv 17 gen = 68 eid 0, type log, LSN [21][984483] perm
    [1307872315:609962][1282/1181583680] MASTER: /opt/bdb/ rep_process_message: msgv = 5 logv 17 gen = 68 eid 0, type bulk_log, LSN [21][984733] perm
    [1307872315:764958][1282/1181583680] MASTER: /opt/bdb/ rep_process_message: msgv = 5 logv 17 gen = 68 eid 0, type bulk_log, LSN [21][984986] perm
    [1307872315:919962][1282/1181583680] MASTER: /opt/bdb/ rep_process_message: msgv = 5 logv 17 gen = 68 eid 0, type bulk_log, LSN [21][985238] perm
    [1307872316:75018][1282/1181583680] MASTER: /opt/bdb/ rep_process_message: msgv = 5 logv 17 gen = 68 eid 0, type bulk_log, LSN [21][985491] perm
    [1307872316:229959][1282/1181583680] MASTER: /opt/bdb/ rep_process_message: msgv = 5 logv 17 gen = 68 eid 0, type bulk_log, LSN [21][985741] perm
    [1307872316:384949][1282/1181583680] MASTER: /opt/bdb/ rep_process_message: msgv = 5 logv 17 gen = 68 eid 0, type bulk_log, LSN [21][985993] perm
    [1307872316:499899][1282/1181583680] MASTER: /opt/bdb/ rep_process_message: msgv = 5 logv 17 gen = 68 eid 0, type bulk_log, LSN [21][986141] perm
    [1307872316:539895][1282/1181583680] MASTER: /opt/bdb/ rep_process_message: msgv = 5 logv 17 gen = 68 eid 0, type log, LSN [21][986221]
    [1307872316:540078][1282/1171093824] MASTER: /opt/bdb/ rep_process_message: msgv = 5 logv 17 gen = 68 eid 0, type log, LSN [21][986307]
    [1307872316:540100][1282/1160603968] MASTER: /opt/bdb/ rep_process_message: msgv = 5 logv 17 gen = 68 eid 0, type log, LSN [21][986394] perm
    [1307872316:694950][1282/1171093824] MASTER: /opt/bdb/ rep_process_message: msgv = 5 logv 17 gen = 68 eid 0, type bulk_log, LSN [21][986648] perm
    [1307872316:847349][1282/1129134400] MASTER: /opt/bdb/ rep_send_message: msgv = 5 logv 17 gen = 70 eid -1, type log, LSN [21][946345]
    [1307872316:847698][1282/1171093824] MASTER: /opt/bdb/ rep_process_message: msgv = 5 logv 17 gen = 68 eid 0, type dupmaster, LSN [0][0]
    [1307872316:847999][1282/1181583680] MASTER: /opt/bdb/ rep_process_message: msgv = 5 logv 17 gen = 68 eid 0, type newclient, LSN [0][0]
    [1307872316:848168][1282/1171093824] MASTER: rep_start: Found old version log 17
    [1307872316:848222][1282/1181583680] CLIENT: Racing replication msg lockout, ignore message.
    [1307872316:848398][1282/1171093824] CLIENT: /opt/bdb/ rep_send_message: msgv = 5 logv 17 gen = 70 eid -1, type newclient, LSN [0][0] nobuf
    [1307872316:848504][1282/1192073536] CLIENT: starting election thread
    [1307872316:848542][1282/1192073536] CLIENT: Start election nsites 2, ack 1, priority 100
    [1307872316:848566][1282/1192073536] CLIENT: Election thread owns egen 71
    [1307872316:849634][1282/1192073536] CLIENT: Tallying VOTE1[0] (2147483647, 71)
    [1307872316:849654][1282/1192073536] CLIENT: Beginning an election
    [1307872316:849680][1282/1192073536] CLIENT: /opt/bdb/ rep_send_message: msgv = 5 logv 17 gen = 70 eid -1, type vote1, LSN [21][946437] nobuf
    [1307872316:851403][1282/1160603968] CLIENT: /opt/bdb/ rep_process_message: msgv = 5 logv 17 gen = 68 eid 0, type vote1, LSN [21][986728]
    [1307872316:851448][1282/1160603968] CLIENT: Received vote1 egen 69, egen 71
    [1307872316:851470][1282/1160603968] CLIENT: Received old vote 69, egen 71, ignoring vote1
    [1307872316:851481][1282/1160603968] CLIENT: /opt/bdb/ rep_send_message: msgv = 5 logv 17 gen = 70 eid 0, type alive, LSN [21][986728] nobuf
    [1307872316:851538][1282/1171093824] CLIENT: /opt/bdb/ rep_process_message: msgv = 5 logv 17 gen = 68 eid 0, type master_req, LSN [0][0]
    [1307872316:851558][1282/1171093824] CLIENT: /opt/bdb/ rep_send_message: msgv = 5 logv 17 gen = 70 eid 0, type alive, LSN [0][0] nobuf
    [1307872316:854254][1282/1160603968] CLIENT: /opt/bdb/ rep_process_message: msgv = 5 logv 17 gen = 70 eid 0, type vote1, LSN [21][986728]
    [1307872316:854275][1282/1160603968] CLIENT: Received vote1 egen 71, egen 71
    [1307872316:854317][1282/1160603968] CLIENT: Tallying VOTE1[1] (0, 71)
    [1307872316:854339][1282/1160603968] CLIENT: Incoming vote: (eid)0 (pri)100 ELECTABLE (gen)70 (egen)71 [21,986728]
    [1307872316:854353][1282/1160603968] CLIENT: Existing vote: (eid)2147483647 (pri)100 (gen)70 (sites)2 [21,946437]
    [1307872316:854369][1282/1160603968] CLIENT: Accepting new vote
    [1307872316:854379][1282/1160603968] CLIENT: Phase1 election done
    [1307872316:854395][1282/1160603968] CLIENT: Voting for 0
    [1307872316:854407][1282/1160603968] CLIENT: /opt/bdb/ rep_send_message: msgv = 5 logv 17 gen = 70 eid 0, type vote2, LSN [0][0] nobuf
    [1307872317:960344][1282/1192073536] CLIENT: After phase 2: votes 0, nvotes 1, nsites 2
    [1307872317:960389][1282/1192073536] CLIENT: Election finished in 1.111809000 sec
    [1307872317:960401][1282/1192073536] CLIENT: Election done; egen 72
    [1307872317:960412][1282/1192073536] CLIENT: Ended election with -30974, e_th 0, egen 72, flag 0x282c, e_fl 0x0, lo_fl 0x0
    Kill me !!
    --- my source
    on the master I run manually :
    txn_rate 1
    loop_rate 10
    loop 1 20000
    * See the file LICENSE for redistribution information.
    * Copyright (c) 2001, 2010 Oracle and/or its affiliates. All rights reserved.
    * $Id$
    * In this application, we specify all communication via the command line. In
    * a real application, we would expect that information about the other sites
    * in the system would be maintained in some sort of configuration file. The
    * critical part of this interface is that we assume at startup that we can
    * find out
    *      1) what our Berkeley DB home environment is,
    *      2) what host/port we wish to listen on for connections; and
    *      3) an optional list of other sites we should attempt to connect to.
    * These pieces of information are expressed by the following flags.
    * -h home (required; h stands for home directory)
    * -l host:port (required; l stands for local)
    * -C or -M (optional; start up as client or master)
    * -r host:port (optional; r stands for remote; any number of these may be
    *     specified)
    * -R host:port (optional; R stands for remote peer; only one of these may
    * be specified)
    * -a all|quorum (optional; a stands for ack policy)
    * -b (optional; b stands for bulk)
    * -n nsites (optional; number of sites in replication group; defaults to 0
    *     to try to dynamically compute nsites)
    * -p priority (optional; defaults to 100)
    * -v (optional; v stands for verbose)
    #include <cstdlib>
    #include <cstring>
    #include <iostream>
    #include <string>
    #include <sstream>
    #include <sys/types.h>
    #include <signal.h>
    #include <db_cxx.h>
    #include "RepConfigInfo.h"
    #include "dbc_auto.h"
    using std::cout;
    using std::cin;
    using std::cerr;
    using std::endl;
    using std::ends;
    using std::flush;
    using std::istream;
    using std::istringstream;
    using std::ostringstream;
    using std::string;
    using std::getline;
    #include <stdio.h>
    #include <readline/readline.h>
    #include <readline/history.h>
    #define     CACHESIZE     (10 * 1024 * 1024)
    #define     DATABASE     "quote.db"
    #define     DATABASE2     "quote2.db"
    const char *progname = "excxx_repquote";
    #include <errno.h>
    #ifdef _WIN32
    #define WIN32_LEAN_AND_MEAN
    #include <windows.h>
    #define     snprintf          _snprintf
    #define     sleep(s)          Sleep(1000 * (s))
    extern "C" {
    extern int getopt(int, char * const *, const char *);
    extern char *optarg;
    typedef HANDLE thread_t;
    typedef DWORD thread_exit_status_t;
    #define     thread_create(thrp, attr, func, arg)                    \
    (((*(thrp) = CreateThread(NULL, 0,                         \
         (LPTHREAD_START_ROUTINE)(func), (arg), 0, NULL)) == NULL) ? -1 : 0)
    #define     thread_join(thr, statusp)                         \
    ((WaitForSingleObject((thr), INFINITE) == WAIT_OBJECT_0) &&          \
    GetExitCodeThread((thr), (LPDWORD)(statusp)) ? 0 : -1)
    #else /* !_WIN32 */
    #include <pthread.h>
    typedef pthread_t thread_t;
    typedef void* thread_exit_status_t;
    #define     thread_create(thrp, attr, func, arg)                    \
    pthread_create((thrp), (attr), (func), (arg))
    #define     thread_join(thr, statusp) pthread_join((thr), (statusp))
    #endif
    // Struct used to store information in Db app_private field.
    typedef struct {
         bool app_finished;
         bool in_client_sync;
         bool is_master;
         bool no_dummy_wr;
    } APP_DATA;
    static void log(const char *);
    void checkpoint_thread (void );
    void log_archive_thread (void );
    void dummy_write_thread (void );
    class RepQuoteExample {
    public:
         RepQuoteExample();
         void init(RepConfigInfo* config);
         void doloop();
         int terminate();
         static void event_callback(DbEnv* dbenv, u_int32_t which, void *info);
         void print_stocks_size(Db *dbp);
    private:
         // disable copy constructor.
         RepQuoteExample(const RepQuoteExample &);
         void operator = (const RepQuoteExample &);
         // internal data members.
         APP_DATA          app_data;
         RepConfigInfo *app_config;
         DbEnv          cur_env;
         thread_t ckp_thr;
         thread_t lga_thr;
         thread_t dmy_thr;
         // private methods.
         void print_stocks(Db *dbp);
         void print_env(DbEnv *dbenv);
         void prompt();
    RepQuoteExample *g_runner=NULL;
    RepConfigInfo *g_config=NULL;
    class DbHolder {
    public:
         DbHolder(DbEnv env, const char _dbname) : env(env)
              dbp = 0;
              if (_dbname) dbname=_dbname;
              else dbname=DATABASE;
         ~DbHolder() {
         try {
              close();
         } catch (...) {
              // Ignore: this may mean another exception is pending
         bool ensure_open(bool creating) {
         if (dbp)
              return (true);
         dbp = new Db(env, 0);
         u_int32_t flags = DB_AUTO_COMMIT;
         if (creating)
              flags |= DB_CREATE;
         try {
              //dbp->open(NULL, DATABASE, NULL, DB_BTREE, flags, 0);
              //dbp->open(NULL, dbname, NULL, DB_BTREE, flags, 0);
              dbp->open(NULL, NULL, dbname, DB_BTREE, flags, 0);
              return (true);
         } catch (DbDeadlockException e) {
         } catch (DbRepHandleDeadException e) {
         } catch (DbException e) {
              if (e.get_errno() == DB_REP_LOCKOUT) {
              // Just fall through.
              } else if (e.get_errno() == ENOENT && !creating) {
              // Provide a bit of extra explanation.
              log("Stock DB does not yet exist");
              } else
              throw;
         // (All retryable errors fall through to here.)
         log("please retry the operation");
         close();
         return (false);
         void close() {
         if (dbp) {
              try {
              dbp->close(0);
              delete dbp;
              dbp = 0;
              } catch (...) {
              delete dbp;
              dbp = 0;
              throw;
         operator Db *() {
         return dbp;
         Db *operator->() {
         return dbp;
    private:
         Db *dbp;
         DbEnv *env;
         const char *dbname;
    class StringDbt : public Dbt {
    public:
    #define GET_STRING_OK 0
    #define GET_STRING_INVALID_PARAM 1
    #define GET_STRING_SMALL_BUFFER 2
    #define GET_STRING_EMPTY_DATA 3
         int get_string(char **buf, size_t buf_len)
              size_t copy_len;
              int ret = GET_STRING_OK;
              if (buf == NULL) {
                   cerr << "Invalid input buffer to get_string" << endl;
                   return GET_STRING_INVALID_PARAM;
              // make sure the string is null terminated.
              memset(*buf, 0, buf_len);
              // if there is no string, just return.
              if (get_data() == NULL || get_size() == 0)
                   return GET_STRING_OK;
              if (get_size() >= buf_len) {
                   ret = GET_STRING_SMALL_BUFFER;
                   copy_len = buf_len - 1; // save room for a terminator.
              } else
                   copy_len = get_size();
              memcpy(*buf, get_data(), copy_len);
              return ret;
         size_t get_string_length()
              if (get_size() == 0)
                   return 0;
              return strlen((char *)get_data());
         void set_string(char *string)
              set_data(string);
              set_size((u_int32_t)strlen(string));
         StringDbt(char *string) :
         Dbt(string, (u_int32_t)strlen(string)) {};
         StringDbt() : Dbt() {};
         ~StringDbt() {};
         // Don't add extra data to this sub-class since we want it to remain
         // compatible with Dbt objects created internally by Berkeley DB.
    Db *g_repquote=NULL;
    RepQuoteExample::RepQuoteExample() : app_config(0), cur_env(0) {
         app_data.app_finished = 0;
         app_data.in_client_sync = 0;
         app_data.is_master = 0; // assume I start out as client
         app_data.no_dummy_wr = 0 ; //prevent to run dummy write
    int (*old_rep_process_message)
              __P((DB_ENV *, DBT *, DBT *, int, DB_LSN *));
    int my_rep_process_message __P((DB_ENV arg1, DBT arg2, DBT arg3, int arg4, DB_LSN arg5))
         printf("EZ->>> my_rep_process_message:%p\n",arg5);
         old_rep_process_message(arg1,arg2,arg3,arg4,arg5);
    void RepQuoteExample::init(RepConfigInfo *config) {
         app_config = config;
         cur_env.set_app_private(&app_data);
         cur_env.set_errfile(stderr);
         app_data.no_dummy_wr=config->no_dummy_wr;
         if (app_data.no_dummy_wr)
              printf("No dummy !!!\n");
         //EZ->cur_env.set_errpfx(progname);
         cur_env.set_event_notify(event_callback);
         // Configure bulk transfer to send groups of records to clients
         // in a single network transfer. This is useful for master sites
         // and clients participating in client-to-client synchronization.
         if (app_config->bulk)
              cur_env.rep_set_config(DB_REP_CONF_BULK, 1);
         // Set the total number of sites in the replication group.
         // This is used by repmgr internal election processing.
         if (app_config->totalsites > 0)
              cur_env.rep_set_nsites(app_config->totalsites);
         // Turn on debugging and informational output if requested.
         if (app_config->verbose)
              cur_env.set_verbose(DB_VERB_REPLICATION, 1);
         cur_env.set_verbose(DB_VERB_REPMGR_MISC, 1);
         cur_env.set_verbose(DB_VERB_RECOVERY, 1);
         cur_env.set_verbose(DB_VERB_REPLICATION, 1);
         cur_env.set_verbose(DB_VERB_REP_ELECT, 1);
         cur_env.set_verbose(DB_VERB_REP_LEASE, 1);
         cur_env.set_verbose(DB_VERB_REP_SYNC, 1);
         cur_env.set_verbose(DB_VERB_REPMGR_MISC, 1);
         // Set replication group election priority for this environment.
         // An election first selects the site with the most recent log
         // records as the new master. If multiple sites have the most
         // recent log records, the site with the highest priority value
         // is selected as master.
         cur_env.rep_set_priority(app_config->priority);
         // Set the policy that determines how master and client sites
         // handle acknowledgement of replication messages needed for
         // permanent records. The default policy of "quorum" requires only
         // a quorum of electable peers sufficient to ensure a permanent
         // record remains durable if an election is held. The "all" option
         // requires all clients to acknowledge a permanent replication
         // message instead.
         cur_env.repmgr_set_ack_policy(app_config->ack_policy);
         // Set the threshold for the minimum and maximum time the client
         // waits before requesting retransmission of a missing message.
         // Base these values on the performance and load characteristics
         // of the master and client host platforms as well as the round
         // trip message time.
         cur_env.rep_set_request(20000, 500000);
         // Configure deadlock detection to ensure that any deadlocks
         // are broken by having one of the conflicting lock requests
         // rejected. DB_LOCK_DEFAULT uses the lock policy specified
         // at environment creation time or DB_LOCK_RANDOM if none was
         // specified.
         cur_env.set_lk_detect(DB_LOCK_DEFAULT);
         // The following base replication features may also be useful to your
         // application. See Berkeley DB documentation for more details.
         // - Master leases: Provide stricter consistency for data reads
         // on a master site.
         // - Timeouts: Customize the amount of time Berkeley DB waits
         // for such things as an election to be concluded or a master
         // lease to be granted.
         // - Delayed client synchronization: Manage the master site's
         // resources by spreading out resource-intensive client
         // synchronizations.
         // - Blocked client operations: Return immediately with an error
         // instead of waiting indefinitely if a client operation is
         // blocked by an ongoing client synchronization.
         cur_env.repmgr_set_local_site(app_config->this_host.host,
         app_config->this_host.port, 0);
         for ( REP_HOST_INFO *cur = app_config->other_hosts; cur != NULL;
              cur = cur->next) {
              cur_env.repmgr_add_remote_site(cur->host, cur->port,
              NULL, cur->peer ? DB_REPMGR_PEER : 0);
         // Configure heartbeat timeouts so that repmgr monitors the
         // health of the TCP connection. Master sites broadcast a heartbeat
         // at the frequency specified by the DB_REP_HEARTBEAT_SEND timeout.
         // Client sites wait for message activity the length of the
         // DB_REP_HEARTBEAT_MONITOR timeout before concluding that the
         // connection to the master is lost. The DB_REP_HEARTBEAT_MONITOR
         // timeout should be longer than the DB_REP_HEARTBEAT_SEND timeout.
         cur_env.rep_set_timeout(DB_REP_HEARTBEAT_SEND, 5000000);
         cur_env.rep_set_timeout(DB_REP_HEARTBEAT_MONITOR, 10000000);
         // The following repmgr features may also be useful to your
         // application. See Berkeley DB documentation for more details.
         // - Two-site strict majority rule - In a two-site replication
         // group, require both sites to be available to elect a new
         // master.
         // - Timeouts - Customize the amount of time repmgr waits
         // for such things as waiting for acknowledgements or attempting
         // to reconnect to other sites.
         // - Site list - return a list of sites currently known to repmgr.
         // We can now open our environment, although we're not ready to
         // begin replicating. However, we want to have a dbenv around
         // so that we can send it into any of our message handlers.
         cur_env.set_cachesize(0, CACHESIZE, 0);
         cur_env.set_flags(DB_REP_PERMANENT, 1);
         //cur_env.set_flags(DB_TXN_WRITE_NOSYNC, 1);
    /*     u_int32_t maxlocks=300000;
         if (maxlocks != 0)
              cur_env.set_lk_max_locks(maxlocks);
         u_int32_t maxlocks_o=300000;
         if (maxlocks_o != 0)
              cur_env.set_lk_max_objects(maxlocks_o);
         u_int32_t maxmutex=300000;
         if (maxmutex != 0)
              cur_env.mutex_set_max(maxmutex);
         DbEnv          *m_env=&cur_env;
         m_env->set_flags(DB_TXN_NOSYNC, 1);
         m_env->set_lk_max_lockers(60000);
         m_env->set_lk_max_objects(60000);
         m_env->set_lk_max_locks(60000);
         m_env->set_tx_max(60000);
         //m_env->repmgr_set_ack_policy(DB_REPMGR_ACKS_NONE);
         m_env->rep_set_timeout(DB_REP_ACK_TIMEOUT, 50 * 1000); //50ms
         m_env->rep_set_timeout(DB_REP_CHECKPOINT_DELAY, 0);
         //m_env->rep_set_timeout(DB_REP_CONNECTION_RETRY, 30 * 1000 * 1000); // 30 seconds
         m_env->rep_set_timeout(DB_REP_ELECTION_TIMEOUT, 1 * 1000 * 1000); // 5 seconds
         m_env->rep_set_timeout(DB_REP_FULL_ELECTION_TIMEOUT, 5 * 1000 * 1000); // 5 seconds
         m_env->rep_set_timeout(DB_REP_CONNECTION_RETRY, 5 * 1000 * 1000);
         //m_env->rep_set_timeout(DB_REP_ELECTION_RETRY, 10 * 1000 * 1000); //10 seconds
         //m_env->rep_set_timeout(DB_REP_HEARTBEAT_MONITOR, 80 * 1000 * 1000); //80 seconds
         //m_env->rep_set_timeout(DB_REP_HEARTBEAT_SEND, 500 * 1000); //500 milli seconds
         //The minimum number of microseconds a client waits before requesting retransmission
         u_int32_t rep_req_min = 40000; //40 000 microsec = 40 mili
         //The maximum number of microseconds a client waits before requesting retransmission
         u_int32_t rep_req_max = 1280000;// 1 280 000 microsec = 1.28 sec
         u_int32_t rep_limit_gbytes = 0;
         u_int32_t rep_limit_bytes = 100 * 1024 * 1024; // 100MB
         m_env->rep_set_request(rep_req_min, rep_req_max);
         m_env->rep_set_limit(rep_limit_gbytes, rep_limit_bytes);
         cur_env.open(app_config->home, DB_CREATE | DB_RECOVER |
         DB_THREAD | DB_INIT_REP | DB_INIT_LOCK | DB_INIT_LOG |
         DB_INIT_MPOOL | DB_INIT_TXN , 0);
         //keep old function for chain
         //old_rep_process_message=cur_env.get_DB_ENV()->rep_process_message;
         //derouting
         //cur_env.get_DB_ENV()->rep_process_message=my_rep_process_message;
         /*int _i;
         cur_env.log_get_config(DB_LOG_DIRECT, &_i);printf ("DB_LOG_DIRECT = %d\n",_i);
         cur_env.log_get_config(DB_LOG_DSYNC, &_i);printf ("DB_LOG_DSYNC = %d\n",_i);
         cur_env.log_get_config(DB_LOG_AUTO_REMOVE, &_i);printf ("DB_LOG_AUTO_REMOVE = %d\n",_i);
         cur_env.log_get_config(DB_LOG_IN_MEMORY, &_i);printf ("DB_LOG_IN_MEMORY = %d\n",_i);
         cur_env.log_get_config(DB_LOG_ZERO,&_i);printf ("DB_LOG_ZERO = %d\n",_i);
         // Start checkpoint and log archive support threads.
         (void)thread_create(&ckp_thr, NULL, checkpoint_thread, &cur_env);
         (void)thread_create(&lga_thr, NULL, log_archive_thread, &cur_env);
         (void)thread_create(&dmy_thr, NULL, dummy_write_thread, &cur_env);
         cur_env.repmgr_start(3, app_config->start_policy);
    }

    int RepQuoteExample::terminate() {
         try {
              // Wait for checkpoint and log archive threads to finish.
              // Windows does not allow NULL pointer for exit code variable.
              thread_exit_status_t exstat;
              (void)thread_join(lga_thr, &exstat);
              (void)thread_join(ckp_thr, &exstat);
              (void)thread_join(dmy_thr, &exstat);
              // We have used the DB_TXN_NOSYNC environment flag for
              // improved performance without the usual sacrifice of
              // transactional durability, as discussed in the
              // "Transactional guarantees" page of the Reference
              // Guide: if one replication site crashes, we can
              // expect the data to exist at another site. However,
              // in case we shut down all sites gracefully, we push
              // out the end of the log here so that the most
              // recent transactions don't mysteriously disappear.
              cur_env.log_flush(NULL);
              cur_env.close(0);
         } catch (DbException dbe) {
              cout << "error closing environment: " << dbe.what() << endl;
         return 0;
    void RepQuoteExample::prompt() {
         cout << "QUOTESERVER";
         if (!app_data.is_master)
              cout << "(read-only)";
         cout << "> " << flush;
    void log(const char *msg) {
    time_t currentTime;
    // get and print the current time
    time (&currentTime); // fill now with the current time
         char buff[255];
         strncpy(buff,ctime(&currentTime),sizeof(buff));
         char *p;
         for(p =buff ; *p != '\n'; p++);
         *p = '\0';
         cerr << buff << " - " << msg << endl;
    // Simple command-line user interface:
    // - enter "<stock symbol> <price>" to insert or update a record in the
    //     database;
    // - just press Return (i.e., blank input line) to print out the contents of
    //     the database;
    // - enter "quit" or "exit" to quit.
    void RepQuoteExample::doloop() {
         DbHolder dbh1(&cur_env,DATABASE);
         DbHolder dbh2(&cur_env,DATABASE2);
         DbHolder *dbh=&dbh1;
         DbTxn *txn;
         string input;
    bool truncate = false;
         char *c;
         using_history();
         g_repquote=*dbh;
         int loop_rate = 0;
         int txn_rate = 500;
         while (prompt(), /*getline(cin, input)*/c=readline(NULL)) {
              input=std::string(c);
              add_history(c);
              free(c);
              int start_loop = 0;
              int end_loop = 0;
              int start_loop_d = 0;
              int end_loop_d = 0;
              istringstream is(input);
              string token1, token2, token3;
    truncate = false;
    start_loop = 0;
    end_loop = 0;
              // Read 0, 1 or 2 tokens from the input.
              int count = 0;
              if (is >> token1) {
                   count++;
                   if (is >> token2)
                   count++;
                   if (is >> token3)
                   count++;
              if (count == 1) {
         if (token1 == "truncate" ) {
                        truncate = true;     
                   else if (token1 == "env" ){
                        print_env(&cur_env);
                        continue;
         else if (token1 == "verbose" ) {
                        app_config->verbose = !app_config->verbose;
                        if (app_config->verbose)
                             cur_env.set_verbose(DB_VERB_REPLICATION, 1);
                             cur_env.set_verbose(DB_VERB_REPMGR_MISC, 1);
                             cur_env.set_verbose(DB_VERB_RECOVERY, 1);
                             cur_env.set_verbose(DB_VERB_REP_ELECT, 1);
                             cur_env.set_verbose(DB_VERB_REP_LEASE, 1);
                             cur_env.set_verbose(DB_VERB_REP_SYNC, 1);
                             cur_env.set_verbose(DB_VERB_REPMGR_MISC, 1);
                             log("verbose is on");
                        else
                             cur_env.set_verbose(DB_VERB_REPLICATION, 0);
                             cur_env.set_verbose(DB_VERB_REPMGR_MISC, 0);
                             cur_env.set_verbose(DB_VERB_RECOVERY, 0);
                             cur_env.set_verbose(DB_VERB_REP_ELECT, 0);
                             cur_env.set_verbose(DB_VERB_REP_LEASE, 0);
                             cur_env.set_verbose(DB_VERB_REP_SYNC, 0);
                             cur_env.set_verbose(DB_VERB_REPMGR_MISC, 0);
                             log("verbose is off");
                        continue;
         else if (token1 == "print" ) {
                   print_stocks(*dbh);
                        count = 0;      
         else if (token1 == "db1" ) {
                        dbh=&dbh1;
                        g_repquote=*dbh;
                        log( "switch to Db1");
                        count = 0;      
         else if (token1 == "db2" ) {
                        dbh=&dbh2;
                        g_repquote=*dbh;
                        log( "switch to Db2");
                        count = 0;      
                   else if (token1 == "exit" || token1 == "quit") {
                        app_data.app_finished = 1;
                        break;
                   } else {
                        log("Format: <stock> <price>");
                        continue;
    else if (count == 2)
                   if (token1 == "loop_rate" ){
         loop_rate = atoi(token2.c_str());
                        continue;
                   if (token1 == "txn_rate" ){
         txn_rate = atoi(token2.c_str());
                        continue;
    else if (count == 3)
    if (token1 == "loop" ) {
    start_loop = atoi(token2.c_str());
    end_loop = start_loop + atoi(token3.c_str());
    if (token1 == "delete" ) {
    start_loop_d = atoi(token2.c_str());
    end_loop_d = start_loop_d + atoi(token3.c_str());
              // Here we know count is either 0 or 2, so we're about to try a
              // DB operation.
              // Open database with DB_CREATE only if this is a master
              // database. A client database uses polling to attempt
              // to open the database without DB_CREATE until it is
              // successful.
              // This DB_CREATE polling logic can be simplified under
              // some circumstances. For example, if the application can
              // be sure a database is already there, it would never need
              // to open it with DB_CREATE.
              if (!dbh->ensure_open(app_data.is_master))
                   continue;
              try {
                   if (count == 0)
                        if (app_data.in_client_sync)
                             log( "Cannot read data during client initialization - please try again.");
                        else
                             print_stocks_size(*dbh);
                   else if (!app_data.is_master)
                        log("Can't update at client");
                   else {
                        if (truncate)
    u_int32_t no_remove;
                        txn = NULL;
    cur_env.txn_begin(NULL, &txn, DB_TXN_NOWAIT);
                             try
              (*dbh)->truncate(txn, &no_remove, 0);
    // commit
    txn->commit(0);
    txn = NULL;
    } catch (DbException &e) {
    std::cout << "Error on txn commit: " << e.what() << std::endl;
                        //     } catch (DbDeadlockException &) {
                        if (txn != NULL)
                             (void)txn->abort();
    // std::cout << "Error on txn commit: " << std::endl;
    else if (start_loop)
    int j=0;
    for (int i=start_loop; i<=end_loop; i=i+txn_rate)
    //transaction begin
                   txn = NULL;
                   cur_env.txn_begin(NULL, &txn, 0);
    for (j=i; j<=end_loop && j<=(i+txn_rate); j++)
                                  Dbt key, value;
         std::string key1, value1;
         std::stringstream sstrm;
         sstrm << "key" << j << ends;
         key1 = sstrm.str();
                   key.set_data((void *)key1.c_str());
                   key.set_size((u_int32_t)strlen(key1.c_str()));
         sstrm.str("");
         int payload = rand() + j;
                                  sstrm << "price" << payload << ends;
         value1 = sstrm.str();
                   value.set_data((void *)value1.c_str());
                   value.set_size((u_int32_t)strlen(value1.c_str()));
         // Perform the database put
         (*dbh)->put(txn, &key, &value, 0);
                             printf("Kill me !!\n");
                             kill(getpid(),-9);
                             exit(0);
         try
                                  // commit
                        txn->commit(0);
                        txn = NULL;
                   } catch (DbException &e) {
                        std::cout << "Error on txn commit: " << e.what() << std::endl;
                             if (loop_rate>0)
                                  usleep(txn_rate * 1000 * 1000 / loop_rate);
                        else if (start_loop_d)
    int j=0;
    for (int i=start_loop_d; i<=end_loop_d; i=i+100)
    //transaction begin
                   txn = NULL;
                   cur_env.txn_begin(NULL, &txn, 0);
    for (j=i; j<=end_loop_d && j<=(i+100); j++)
                                  Dbt key, value;
         std::string key1, value1;
         std::stringstream sstrm;
         sstrm << "key" << j << ends;
         key1 = sstrm.str();
                   key.set_data((void *)key1.c_str());
                   key.set_size((u_int32_t)strlen(key1.c_str()));
         // Perform the database put
         (*dbh)->del(txn, &key, 0);
         try
                                  // commit
                        txn->commit(0);
                        txn = NULL;
                   } catch (DbException &e) {
                        std::cout << "Error on txn commit: " << e.what() << std::endl;
                        else
                             const char *symbol = token1.c_str();
                             StringDbt key(const_cast<char*>(symbol));
                             const char *price = token2.c_str();
                             StringDbt data(const_cast<char*>(price));
                             (*dbh)->put(NULL, &key, &data, 0);
              } catch (DbDeadlockException e) {
                   log("please retry the operation");
                   dbh->close();
              } catch (DbRepHandleDeadException e) {
                   log("please retry the operation");
                   dbh->close();
              } catch (DbException e) {
                   if (e.get_errno() == DB_REP_LOCKOUT) {
                   log("please retry the operation");
                   dbh->close();
                   } else
                   throw;
         dbh->close();
    void RepQuoteExample::event_callback(DbEnv* dbenv, u_int32_t which, void *info)
         static char buf[256];
         APP_DATA app = (APP_DATA)dbenv->get_app_private();
         info = NULL;          /* Currently unused. */
         switch (which) {
         case DB_EVENT_REP_CLIENT:
              app->is_master = 0;
              app->in_client_sync = 1;
              sprintf(buf,"%s - %s",progname,"CLIENT");
              //EZ->dbenv->set_errpfx(buf);
              log("DB_EVENT_REP_CLIENT.");
              break;
         case DB_EVENT_REP_MASTER:
              app->is_master = 1;
              app->in_client_sync = 0;
              sprintf(buf,"%s - %s",progname,"MASTER");
              //EZ->dbenv->set_errpfx(buf);
              log("DB_EVENT_REP_MASTER.");
              break;
         case DB_EVENT_REP_NEWMASTER:
              log("DB_EVENT_REP_NEWMASTER.");
              app->in_client_sync = 1;
              break;
         case DB_EVENT_REP_PERM_FAILED:
              // Did not get enough acks to guarantee transaction
              // durability based on the configured ack policy. This
              // transaction will be flushed to the master site's
              // local disk storage for durability.
              log("DB_EVENT_REP_PERM_FAILED.");
              log("Insufficient acknowledgements to guarantee transaction durability.");
              break;
         case DB_EVENT_REP_STARTUPDONE:
              app->in_client_sync = 0;
              log("DB_EVENT_REP_STARTUPDONE.");
              break;
         case DB_EVENT_REP_ELECTION_FAILED:
              log("DB_EVENT_REP_ELECTION_FAILED.");
              //g_runner->init(g_config);
              printf("Kill me !!\n");
              kill(getpid(),-9);
              exit(0);
              break;
         case DB_EVENT_REP_DUPMASTER:
              log("DB_EVENT_REP_DUPMASTER.");
              break;
         default:
              dbenv->errx("ignoring event %d", which);
    void RepQuoteExample::print_stocks_size(Db *dbp) {
         DB_BTREE_STAT *statp;
    dbp->stat(NULL, &statp, 0);
         log("db_stat");
    cout << "***************************************** >>>>>>>>>>> : database contains " << (u_long)statp->bt_ndata << " records\n";
    void RepQuoteExample::print_env(DbEnv *dbenv) {
         dbenv->stat_print(DB_STAT_ALL);
    void RepQuoteExample::print_stocks(Db *dbp) {
         StringDbt key, data;
    #define     MAXKEYSIZE     10
    #define     MAXDATASIZE     20
         char keybuf[MAXKEYSIZE + 1], databuf[MAXDATASIZE + 1];
         char kbuf, dbuf;
         memset(&key, 0, sizeof(key));
         memset(&data, 0, sizeof(data));
         kbuf = keybuf;
         dbuf = databuf;
         DbcAuto dbc(dbp, 0, 0);
         cout << "\tSymbol\tPrice" << endl
              << "\t======\t=====" << endl;
    int no_records =0;
         for (int ret = dbc->get(&key, &data, DB_FIRST);
              ret == 0;
              ret = dbc->get(&key, &data, DB_NEXT)) {
              key.get_string(&kbuf, MAXKEYSIZE);
              data.get_string(&dbuf, MAXDATASIZE);
    no_records++;
              cout << "\t" << keybuf << "\t" << databuf << endl;
    cout << "********************** NO Records " << no_records << endl;
         cout << endl << flush;
         dbc.close();
    static void usage() {
         cerr << "usage: " << progname << " -h home -l host:port [-CM]"
         << "[-r host:port][-R host:port]" << endl
         << " [-a all|quorum][-b][-n nsites][-p priority][-v]" << endl;
         cerr << "\t -h home (required; h stands for home directory)" << endl
         << "\t -l host:port (required; l stands for local)" << endl
         << "\t -C or -M (optional; start up as client or master)" << endl
         << "\t -r host:port (optional; r stands for remote; any "
         << "number of these" << endl
         << "\t may be specified)" << endl
         << "\t -R host:port (optional; R stands for remote peer; only "
         << "one of" << endl
         << "\t these may be specified)" << endl
         << "\t -a all|quorum (optional; a stands for ack policy)" << endl
         << "\t -b (optional; b stands for bulk)" << endl
         << "\t -n nsites (optional; number of sites in replication "
         << "group; defaults " << endl
         << "\t     to 0 to try to dynamically compute nsites)" << endl
         << "\t -p priority (optional; defaults to 100)" << endl
         << "\t -v (optional; v stands for verbose)" << endl;
         exit(EXIT_FAILURE);
    int main(int argc, char **argv) {
         RepConfigInfo config;
         char ch, portstr, tmphost;
         int tmpport;
         bool tmppeer;
         config.no_dummy_wr = false;
         // Extract the command line parameters
         while ((ch = getopt(argc, argv, "E:a:bCh:l:Mn:p:R:r:vw")) != EOF) {
              tmppeer = false;
              switch (ch) {
              case 'a':
                   if (strncmp(optarg, "all", 3) == 0)
                        config.ack_policy = DB_REPMGR_ACKS_ALL;
                   else if (strncmp(optarg, "quorum", 6) != 0)
                        usage();
                   break;
              case 'b':
                   config.bulk = true;
                   break;
              case 'C':
                   config.start_policy = DB_REP_CLIENT;
                   break;
              case 'E':
    config.start_policy = DB_REP_ELECTION;
    break;
              case 'h':
                   config.home = optarg;
                   break;
              case 'l':
                   config.this_host.host = strtok(optarg, ":");
                   if ((portstr = strtok(NULL, ":")) == NULL) {
                        cerr << "Bad host specification." << endl;
                        usage();
                   config.this_host.port = (unsigned short)atoi(portstr);
                   config.got_listen_address = true;
                   break;
              case 'M':
                   config.start_policy = DB_REP_MASTER;
                   break;
              case 'n':
                   config.totalsites = atoi(optarg);
                   break;
              case 'p':
                   config.priority = atoi(optarg);
                   break;
              case 'R':
                   tmppeer = true; // FALLTHROUGH
              case 'r':
                   tmphost = strtok(optarg, ":");
                   if ((portstr = strtok(NULL, ":")) == NULL) {
                        cerr << "Bad host specification." << endl;
                        usage();
                   tmpport = (unsigned short)atoi(portstr);
                   config.addOtherHost(tmphost, tmpport, tmppeer);
                   break;
              case 'v':
                   config.verbose = true;
                   break;
              case 'w':
                   config.no_dummy_wr = true;
                   //config.priority = 2;
                   break;
              case '?':
              default:
                   usage();
         // Error check command line.
         if ((!config.got_listen_address) || config.home == NULL)
              usage();
         RepQuoteExample runner;
         g_runner=&runner;
         g_config=&config;
         try {
              runner.init(&config);
              runner.doloop();
         } catch (DbException dbe) {
              cerr << "Caught an exception during initialization or"
                   << " processing: " << dbe.what() << endl;
         runner.terminate();
         return 0;
    // This is a very simple thread that performs checkpoints at a fixed
    // time interval. For a master site, the time interval is one minute
    // plus the duration of the checkpoint_delay timeout (30 seconds by
    // default.) For a client site, the time interval is one minute.
    void checkpoint_thread(void args)
         DbEnv *env;
         APP_DATA *app;
         int i, ret;
         env = (DbEnv *)args;
         app = (APP_DATA *)env->get_app_private();
         for (;;) {
              // Wait for one minute, polling once per second to see if
              // application has finished. When application has finished,
              // terminate this thread.
              for (i = 0; i < 60; i++) {
                   sleep(1);
                   if (app->app_finished == 1)
                        return ((void *)EXIT_SUCCESS);
              // Perform a checkpoint.
              // original line
              if ((ret = env->txn_checkpoint(0, 0, 0)) != 0) {
              //if ((ret = env->txn_checkpoint(0, 0, DB_FORCE)) != 0) {
                   env->err(ret, "Could not perform checkpoint.\n");
                   return ((void *)EXIT_FAILURE);
    // This is a simple log archive thread. Once per minute, it removes all but
    // the most recent 3 logs that are safe to remove according to a call to
    // DBENV->log_archive().
    // Log cleanup is needed to conserve disk space, but aggressive log cleanup
    // can cause more frequent client initializations if a client lags too far
    // behind the current master. This can happen in the event of a slow client,
    // a network partition, or a new master that has not kept as many logs as the
    // previous master.
    // The approach in this routine balances the need to mitigate against a
    // lagging client by keeping a few more of the most recent unneeded logs
    // with the need to conserve disk space by regularly cleaning up log files.
    // Use of automatic log removal (DBENV->log_set_config() DB_LOG_AUTO_REMOVE
    // flag) is not recommended for replication due to the risk of frequent
    // client initializations.
    void log_archive_thread(void args)
         DbEnv *env;
         APP_DATA *app;
         char **begin, **list;
         int i, listlen, logs_to_keep, minlog, ret;
         env = (DbEnv *)args;
         app = (APP_DATA *)env->get_app_private();
         logs_to_keep = 3;
         for (;;) {
              // Wait for one minute, polling once per second to see if
              // application has finished. When application has finished,
              // terminate this thread.
              for (i = 0; i < 60; i++) {
                   sleep(1);
                   if (app->app_finished == 1)
                        return ((void *)EXIT_SUCCESS);
              // Get the list of unneeded log files.
              if ((ret = env->log_archive(&list, DB_ARCH_ABS)) != 0) {
                   env->err(ret, "Could not get log archive list.");
                   return ((void *)EXIT_FAILURE);
              if (list != NULL) {
                   listlen = 0;
                   // Get the number of logs in the list.
                   for (begin = list; *begin != NULL; begin++, listlen++);
                   // Remove all but the logs_to_keep most recent
                   // unneeded log files.
                   minlog = listlen - logs_to_keep;
                   for (begin = list, i= 0; i < minlog; list++, i++) {
                        if ((ret = unlink(*list)) != 0) {
                             env->err(ret,
                             "logclean: remove %s", *list);
                             env->errx(
                             "logclean: Error remove %s", *list);
                             free(begin);
                             return ((void *)EXIT_FAILURE);
                   free(begin);
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