public static RepQuoteEnvironment Open(string home, DatabaseEnvironmentConfig cfg)
{
RepQuoteEnvironment dbEnv = new RepQuoteEnvironment();
dbEnv.env = DatabaseEnvironment.Open(home, cfg);
dbEnv._appFinished = false;
dbEnv._inClientSync = false;
dbEnv._isMaster = false;
return dbEnv;
}
public static RepQuoteEnvironment Open(string home, DatabaseEnvironmentConfig cfg)
{
RepQuoteEnvironment dbEnv = new RepQuoteEnvironment();
dbEnv.env = DatabaseEnvironment.Open(home, cfg);
dbEnv._appFinished = false;
dbEnv._inClientSync = false;
dbEnv._isMaster = false;
return(dbEnv);
}
public RepQuoteExample()
{
dbenv = null;
}
public int init(RepConfig config)
{
int ret = 0;
DatabaseEnvironmentConfig envConfig = new DatabaseEnvironmentConfig();
envConfig.ErrorPrefix = RepConfig.progname;
envConfig.RepSystemCfg = new ReplicationConfig();
envConfig.RepSystemCfg.RepmgrSitesConfig.Add(config.localSite);
for (int i = 0; i < config.remoteSites.Count; i++)
envConfig.RepSystemCfg.RepmgrSitesConfig.Add(config.remoteSites[i]);
envConfig.RepSystemCfg.BulkTransfer = config.bulk;
/*
* 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.
*/
envConfig.RepSystemCfg.HeartbeatMonitor = 10000000;
envConfig.RepSystemCfg.HeartbeatSend = 5000000;
/*
* 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.
*/
envConfig.RepSystemCfg.Priority = config.priority;
envConfig.MPoolSystemCfg = new MPoolConfig();
envConfig.MPoolSystemCfg.CacheSize = RepConfig.CACHESIZE;
envConfig.TxnNoSync = true;
envConfig.EventNotify = new EventNotifyDelegate(RepQuoteEventHandler);
/*
* 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.
*/
envConfig.RepSystemCfg.RepMgrAckPolicy = config.ackPolicy;
/*
* 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.
*/
envConfig.RepSystemCfg.RetransmissionRequest(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.
*/
envConfig.LockSystemCfg = new LockingConfig();
envConfig.LockSystemCfg.DeadlockResolution = DeadlockPolicy.DEFAULT;
envConfig.Create = true;
envConfig.RunRecovery = true;
envConfig.FreeThreaded = true;
envConfig.UseReplication = true;
envConfig.UseLocking = true;
envConfig.UseLogging = true;
envConfig.UseMPool = true;
envConfig.UseTxns = true;
envConfig.Verbosity = new VerboseMessages();
envConfig.Verbosity.Replication = config.verbose;
try
{
dbenv = RepQuoteEnvironment.Open(config.home, envConfig);
} catch(DatabaseException e)
{
Console.WriteLine("Fail to open environment: " + e.Message);
return 1;
}
/* 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.
*
* 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.
*/
/* Start checkpoint and log archive support threads. */
checkpointThread = new Thread(new ThreadStart(CheckPoint));
checkpointThread.Start();
logArchiveThread = new Thread(new ThreadStart(LogArchive));
logArchiveThread.Start();
/* Start replication manager. */
if (config.startPolicy == StartPolicy.CLIENT)
dbenv.env.RepMgrStartClient(3);
else if (config.startPolicy == StartPolicy.ELECTION)
dbenv.env.RepMgrStartClient(3, true);
else if (config.startPolicy == StartPolicy.MASTER)
dbenv.env.RepMgrStartMaster(3);
return ret;
}
public int init(RepConfig config)
{
int ret = 0;
DatabaseEnvironmentConfig envConfig = new DatabaseEnvironmentConfig();
envConfig.ErrorPrefix = RepConfig.progname;
envConfig.RepSystemCfg = new ReplicationConfig();
envConfig.RepSystemCfg.RepmgrSitesConfig.Add(config.localSite);
for (int i = 0; i < config.remoteSites.Count; i++)
{
envConfig.RepSystemCfg.RepmgrSitesConfig.Add(config.remoteSites[i]);
}
envConfig.RepSystemCfg.BulkTransfer = config.bulk;
/*
* 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.
*/
envConfig.RepSystemCfg.HeartbeatMonitor = 10000000;
envConfig.RepSystemCfg.HeartbeatSend = 5000000;
/*
* 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.
*/
envConfig.RepSystemCfg.Priority = config.priority;
envConfig.MPoolSystemCfg = new MPoolConfig();
envConfig.MPoolSystemCfg.CacheSize = RepConfig.CACHESIZE;
envConfig.TxnNoSync = true;
envConfig.EventNotify = new EventNotifyDelegate(RepQuoteEventHandler);
/*
* 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.
*/
envConfig.RepSystemCfg.RepMgrAckPolicy = config.ackPolicy;
/*
* 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.
*/
envConfig.RepSystemCfg.RetransmissionRequest(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.
*/
envConfig.LockSystemCfg = new LockingConfig();
envConfig.LockSystemCfg.DeadlockResolution = DeadlockPolicy.DEFAULT;
envConfig.Create = true;
envConfig.RunRecovery = true;
envConfig.FreeThreaded = true;
envConfig.UseReplication = true;
envConfig.UseLocking = true;
envConfig.UseLogging = true;
envConfig.UseMPool = true;
envConfig.UseTxns = true;
envConfig.Verbosity = new VerboseMessages();
envConfig.Verbosity.Replication = config.verbose;
try
{
dbenv = RepQuoteEnvironment.Open(config.home, envConfig);
} catch (DatabaseException e)
{
Console.WriteLine("Fail to open environment: " + e.Message);
return(1);
}
/* 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.
*
* 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.
*/
/* Start checkpoint and log archive support threads. */
checkpointThread = new Thread(new ThreadStart(CheckPoint));
checkpointThread.Start();
logArchiveThread = new Thread(new ThreadStart(LogArchive));
logArchiveThread.Start();
/* Start replication manager. */
if (config.startPolicy == StartPolicy.CLIENT)
{
dbenv.env.RepMgrStartClient(3);
}
else if (config.startPolicy == StartPolicy.ELECTION)
{
dbenv.env.RepMgrStartClient(3, true);
}
else if (config.startPolicy == StartPolicy.MASTER)
{
dbenv.env.RepMgrStartMaster(3);
}
return(ret);
}
} /* End main. */
public RepQuoteExample()
{
dbenv = null;
}
