C# MembershipEntry类代码示例

        public void UpdateIAmAlive(MembershipEntry entry)
        {
            Tuple<MembershipEntry, string> data;
            siloTable.TryGetValue(entry.SiloAddress, out data);
            if (data == null) return;

            data.Item1.IAmAliveTime = entry.IAmAliveTime;
            siloTable[entry.SiloAddress] = new Tuple<MembershipEntry, string>(data.Item1, NewETag());
        }

        public Task<bool> UpdateRow(MembershipEntry entry, string etag, TableVersion tableVersion)
        {
            if (logger.IsVerbose) logger.Verbose("UpdateRow entry = {0}, etag = {1}, table version = {2}", entry.ToFullString(), etag, tableVersion);
            bool result = table.Update(entry, etag, tableVersion);
            if (result == false)
                logger.Info(ErrorCode.MembershipGrainBasedTable3,
                    "Update of {0}, eTag {1}, table version {2} failed. Table now is {3}",
                    entry.ToFullString(), etag, tableVersion, table.ReadAll());

            return Task.FromResult(result);
        }

        public Task<bool> InsertRow(MembershipEntry entry, TableVersion tableVersion)
        {
            if (logger.IsVerbose) logger.Verbose("InsertRow entry = {0}, table version = {1}", entry.ToFullString(), tableVersion);
            bool result = table.Insert(entry, tableVersion);
            if (result == false)
                logger.Info(ErrorCode.MembershipGrainBasedTable2, 
                    "Insert of {0} and table version {1} failed. Table now is {2}",
                    entry.ToFullString(), tableVersion, table.ReadAll());

            return Task.FromResult(result);
        }

 public bool Update(MembershipEntry entry, string etag, TableVersion version)
 {
     Tuple<MembershipEntry, string> data;
     siloTable.TryGetValue(entry.SiloAddress, out data);
     if (data == null) return false;
     if (!data.Item2.Equals(etag) || !tableVersion.VersionEtag.Equals(version.VersionEtag)) return false;
     
     siloTable[entry.SiloAddress] = new Tuple<MembershipEntry, string>(
         entry, lastETagCounter++.ToString(CultureInfo.InvariantCulture));
     tableVersion = new TableVersion(version.Version, NewETag());
     return true;
 }

        public async Task<bool> InsertRow(MembershipEntry entry, TableVersion tableVersion)
        {
            try
            {
                if (logger.IsVerbose) logger.Verbose("InsertRow entry = {0}, table version = {1}", entry.ToFullString(), tableVersion);
                var tableEntry = Convert(entry, tableManager.DeploymentId);
                var versionEntry = tableManager.CreateTableVersionEntry(tableVersion.Version);

                bool result = await tableManager.InsertSiloEntryConditionally(
                    tableEntry, versionEntry, tableVersion.VersionEtag);

                if (result == false)
                    logger.Warn(ErrorCode.AzureTable_22, String.Format("Insert failed due to contention on the table. Will retry. Entry {0}, table version = {1}", entry.ToFullString(), tableVersion));
                return result;
            }
            catch (Exception exc)
            {
                logger.Warn(ErrorCode.AzureTable_23, String.Format("Intermediate error inserting entry {0} tableVersion {1} to the table {2}.",
                    entry.ToFullString(), (tableVersion == null ? "null" : tableVersion.ToString()), tableManager.TableName), exc);
                throw;
            }
        }

        private static IDbDataParameter CreateSuspectingSilosParameter(IDbCommand command, MembershipEntry membershipEntry, ParameterDirection direction)
        {
            //TODO: Refactor the database to take DATETIME2(7) and change the data type here accordingly.
            var parameter = command.CreateParameter();
            parameter.ParameterName = "suspectingSilos";
            parameter.DbType = DbType.String;
            parameter.Direction = direction;

            if(membershipEntry.SuspectTimes != null)
            {
                var siloList = new StringBuilder();
                bool first = true;
                foreach(var tuple in membershipEntry.SuspectTimes)
                {
                    if(!first)
                    {
                        siloList.Append('|');
                    }
                    siloList.Append(tuple.Item1.ToParsableString());
                    first = false;
                }

                parameter.Value = siloList.ToString();
            }
            else
            {
                parameter.Value = DBNull.Value;
            }

            return parameter;
        }

        /// <summary>
        /// Updates membership row data.
        /// </summary>
        /// <param name="deploymentId">The deployment with which to insert row.</param>
        /// <param name="etag">The etag of which to use to check if the membership data being updated is not stale.</param>
        /// <param name="membershipEntry">The membership data to used to update database.</param>
        /// <param name="version">The membership version used to update database.</param>
        /// <returns><em>TRUE</em> if update SUCCEEDS. <em>FALSE</em> ot</returns>
        internal async Task<bool> UpdateMembershipRowAsync(string deploymentId, string etag, MembershipEntry membershipEntry, TableVersion version)
        {
            var ret = await storage.ReadAsync(orleansQueries.UpdateMembershipKey, command =>
            {
                var siloIdParameter = CreateDeploymentIdParameter(command, deploymentId);
                command.Parameters.Add(siloIdParameter);


                var versionEtagParameter = CreateVersionEtagParameter(command, version.VersionEtag);
                command.Parameters.Add(versionEtagParameter);

                //The insert membership row part.
                var etagParameter = CreateEtagParameter(command, etag);
                command.Parameters.Add(etagParameter);

                var addressParameter = CreateAddressParameter(command, membershipEntry.SiloAddress.Endpoint.Address);
                command.Parameters.Add(addressParameter);

                var portParameter = CreatePortParameter(command, membershipEntry.SiloAddress.Endpoint.Port);
                command.Parameters.Add(portParameter);

                var generationParameter = CreateGenerationParameter(command, membershipEntry.SiloAddress.Generation);
                command.Parameters.Add(generationParameter);

                var hostNameParameter = CreateHostNameParameter(command, membershipEntry.HostName);
                command.Parameters.Add(hostNameParameter);

                var statusParameter = CreateStatusParameter(command, membershipEntry.Status);
                command.Parameters.Add(statusParameter);

                var proxyPortParameter = CreateProxyPortParameter(command, membershipEntry.ProxyPort);
                command.Parameters.Add(proxyPortParameter);

                var roleNameParameter = CreateRoleNameParameter(command, membershipEntry.RoleName);
                command.Parameters.Add(roleNameParameter);

                var instanceNameParameter = CreateInstanceNameParameter(command, membershipEntry.InstanceName);
                command.Parameters.Add(instanceNameParameter);

                var updateZoneParameter = CreateUpdateZoneParameter(command, membershipEntry.UpdateZone);
                command.Parameters.Add(updateZoneParameter);

                var faultZoneParameter = CreateFaultZoneParameter(command, membershipEntry.FaultZone);
                command.Parameters.Add(faultZoneParameter);

                var startTimeParameter = CreateStartTimeParameter(command, membershipEntry.StartTime);
                command.Parameters.Add(startTimeParameter);

                var iAmAliveTimeParameter = CreateIAmAliveTimeParameter(command, membershipEntry.IAmAliveTime);
                command.Parameters.Add(iAmAliveTimeParameter);
                
                var suspectingSilosParameter = CreateSuspectingSilosParameter(command, membershipEntry);
                command.Parameters.Add(suspectingSilosParameter);

                var suspectingTimesParameter = CreateSuspectingTimesParameter(command, membershipEntry);
                command.Parameters.Add(suspectingTimesParameter);

            }, (selector, resultSetCount, cancellationToken) => { return Task.FromResult(selector.GetBoolean(0)); }).ConfigureAwait(continueOnCapturedContext: false);

            return ret.First();
        }

        Task<bool> IMembershipTable.UpdateRow(MembershipEntry entry, string etag, TableVersion tableVersion)
        {
            if (logger.IsVerbose3) logger.Verbose3(string.Format("IMembershipTable.UpdateRow called with entry {0}, etag {1} and tableVersion {2}.", entry, etag, tableVersion));

            //The "tableVersion" parameter should always exist when updating a row as Init should
            //have been called and membership version created and read. This is an optimization to
            //not to go through all the way to database to fail a conditional check (which does
            //exist for the sake of robustness) as mandated by Orleans membership protocol.
            //Likewise, no update can be done without membership entry or an etag.
            if (entry == null)
            {
                if (logger.IsVerbose) logger.Verbose("SqlMembershipTable.UpdateRow aborted due to null check. MembershipEntry is null.");
                throw new ArgumentNullException("entry");
            }
            if (etag == null)
            {
                if (logger.IsVerbose) logger.Verbose("SqlMembershipTable.UpdateRow aborted due to null check. etag is null.");
                throw new ArgumentNullException("etag");
            }
            if (tableVersion == null)
            {
                if (logger.IsVerbose) logger.Verbose("SqlMembershipTable.UpdateRow aborted due to null check. TableVersion is null ");
                throw new ArgumentNullException("tableVersion");
            }

            try
            {
                return orleansQueries.UpdateMembershipRowAsync(deploymentId, etag, entry, tableVersion);                                
            }
            catch(Exception ex)
            {
                if (logger.IsVerbose) logger.Verbose("SqlMembershipTable.UpdateRow failed: {0}", ex);
                throw;
            }
        }

        Task<bool> IMembershipTable.InsertRow(MembershipEntry entry, TableVersion tableVersion)
        {
            if (logger.IsVerbose3) logger.Verbose3(string.Format("SqlMembershipTable.InsertRow called with entry {0} and tableVersion {1}.", entry, tableVersion));

            //The "tableVersion" parameter should always exist when inserting a row as Init should
            //have been called and membership version created and read. This is an optimization to
            //not to go through all the way to database to fail a conditional check on etag (which does
            //exist for the sake of robustness) as mandated by Orleans membership protocol.
            //Likewise, no update can be done without membership entry.
            if (entry == null)
            {
                if (logger.IsVerbose) logger.Verbose("SqlMembershipTable.InsertRow aborted due to null check. MembershipEntry is null.");
                throw new ArgumentNullException("entry");
            }
            if (tableVersion == null)
            {
                if (logger.IsVerbose) logger.Verbose("SqlMembershipTable.InsertRow aborted due to null check. TableVersion is null ");
                throw new ArgumentNullException("tableVersion");
            }

            try
            {
                var query = queryConstants.GetConstant(database.InvariantName, QueryKeys.InsertMembershipKey);
                return database.InsertMembershipRowAsync(query, deploymentId, entry, tableVersion);
            }
            catch(Exception ex)
            {
                if (logger.IsVerbose) logger.Verbose("SqlMembershipTable.InsertRow failed: {0}", ex);
                throw;
            }            
        }

        private static IDbDataParameter CreateSuspectingTimesParameter(IDbCommand command, MembershipEntry membershipEntry, ParameterDirection direction)
        {            
            var parameter = command.CreateParameter();
            parameter.ParameterName = "suspectingTimes";
            parameter.DbType = DbType.String;
            parameter.Direction = direction;

            if(membershipEntry.SuspectTimes != null)
            {
                var timeList = new StringBuilder();
                bool first = true;
                foreach(var tuple in membershipEntry.SuspectTimes)
                {
                    if(!first)
                    {
                        timeList.Append('|');
                    }
                    timeList.Append(TraceLogger.PrintDate(tuple.Item2));
                    first = false;
                }

                parameter.Value = timeList.ToString();
            }
            else
            {
                parameter.Value = DBNull.Value;
            }

            return parameter;
        }

        /// <summary>
        /// Updates membership row data.
        /// </summary>
        /// <param name="storage">The storage to use.</param>
        /// <param name="query">The query to use.</param>
        /// <param name="deploymentId">The deployment with which to insert row.</param>
        /// <param name="etag">The etag of which to use to check if the membership data being updated is not stale.</param>
        /// <param name="membershipEntry">The membership data to used to update database.</param>
        /// <param name="version">The membership version used to update database.</param>
        /// <returns><em>TRUE</em> if update SUCCEEDS. <em>FALSE</em> ot</returns>
        internal static async Task<bool> UpdateMembershipRowAsync(this IRelationalStorage storage, string query, string deploymentId, string etag, MembershipEntry membershipEntry, TableVersion version)
        {            
            var ret = await storage.ReadAsync(query, command =>
            {
                var direction = ParameterDirection.Input;
                var siloIdParameter = CreateDeploymentIdParameter(command, deploymentId, direction);
                command.Parameters.Add(siloIdParameter);

                var versionParameter = CreateVersionParameter(command, version.Version, direction);
                command.Parameters.Add(versionParameter);

                var versionEtagParameter = CreateVersionEtagParameter(command, version.VersionEtag, direction);
                command.Parameters.Add(versionEtagParameter);

                //The insert membership row part.
                var etagParameter = CreateEtagParameter(command, etag, direction);
                command.Parameters.Add(etagParameter);

                var addressParameter = CreateAddressParameter(command, membershipEntry.SiloAddress.Endpoint.Address, direction);
                command.Parameters.Add(addressParameter);

                var portParameter = CreatePortParameter(command, membershipEntry.SiloAddress.Endpoint.Port, direction);
                command.Parameters.Add(portParameter);

                var generationParameter = CreateGenerationParameter(command, membershipEntry.SiloAddress.Generation, direction);
                command.Parameters.Add(generationParameter);

                var hostNameParameter = CreateHostNameParameter(command, membershipEntry.HostName, direction);
                command.Parameters.Add(hostNameParameter);

                var statusParameter = CreateStatusParameter(command, membershipEntry.Status, direction);
                command.Parameters.Add(statusParameter);

                var proxyPortParameter = CreateProxyPortParameter(command, membershipEntry.ProxyPort, direction);
                command.Parameters.Add(proxyPortParameter);

                var roleNameParameter = CreateRoleNameParameter(command, membershipEntry.RoleName, direction);
                command.Parameters.Add(roleNameParameter);

                var instanceNameParameter = CreateInstanceNameParameter(command, membershipEntry.InstanceName, direction);
                command.Parameters.Add(instanceNameParameter);

                var updateZoneParameter = CreateUpdateZoneParameter(command, membershipEntry.UpdateZone, direction);
                command.Parameters.Add(updateZoneParameter);

                var faultZoneParameter = CreateFaultZoneParameter(command, membershipEntry.FaultZone, direction);
                command.Parameters.Add(faultZoneParameter);

                var startTimeParameter = CreateStartTimeParameter(command, membershipEntry.StartTime, direction);
                command.Parameters.Add(startTimeParameter);

                var iAmAliveTimeParameter = CreateIAmAliveTimeParameter(command, membershipEntry.IAmAliveTime, direction);
                command.Parameters.Add(iAmAliveTimeParameter);

                var suspectingSilosParameter = CreateSuspectingSilosParameter(command, membershipEntry, direction);
                command.Parameters.Add(suspectingSilosParameter);

                var suspectingTimesParameter = CreateSuspectingTimesParameter(command, membershipEntry, direction);
                command.Parameters.Add(suspectingTimesParameter);

            }, (selector, _) => { return selector.GetBoolean(0); }).ConfigureAwait(continueOnCapturedContext: false);

            return ret.First();
        }

        internal static ConsulSiloRegistration FromMembershipEntry(String deploymentId, MembershipEntry entry, String etag)
        {
            var ret = new ConsulSiloRegistration
            {
                DeploymentId = deploymentId,
                Address = entry.SiloAddress,
                IAmAliveTime = entry.IAmAliveTime,
                LastIndex = Convert.ToUInt64(etag),
                Hostname = entry.HostName,
                ProxyPort = entry.ProxyPort,
                StartTime = entry.StartTime,
                Status = entry.Status,
                SiloName = entry.SiloName,
                SuspectingSilos = entry.SuspectTimes.Select(silo => new SuspectingSilo { Id = silo.Item1.ToParsableString(), Time = silo.Item2 }).ToList()
            };

            return ret;
        }

        private static SiloInstanceTableEntry Convert(MembershipEntry memEntry, string deploymentId)
        {
            var tableEntry = new SiloInstanceTableEntry
            {
                DeploymentId = deploymentId,
                Address = memEntry.SiloAddress.Endpoint.Address.ToString(),
                Port = memEntry.SiloAddress.Endpoint.Port.ToString(CultureInfo.InvariantCulture),
                Generation = memEntry.SiloAddress.Generation.ToString(CultureInfo.InvariantCulture),
                HostName = memEntry.HostName,
                Status = memEntry.Status.ToString(),
                ProxyPort = memEntry.ProxyPort.ToString(CultureInfo.InvariantCulture),
                RoleName = memEntry.RoleName,
                InstanceName = memEntry.InstanceName,
                UpdateZone = memEntry.UpdateZone.ToString(CultureInfo.InvariantCulture),
                FaultZone = memEntry.FaultZone.ToString(CultureInfo.InvariantCulture),
                StartTime = TraceLogger.PrintDate(memEntry.StartTime),
                IAmAliveTime = TraceLogger.PrintDate(memEntry.IAmAliveTime)
            };

            if (memEntry.SuspectTimes != null)
            {
                var siloList = new StringBuilder();
                var timeList = new StringBuilder();
                bool first = true;
                foreach (var tuple in memEntry.SuspectTimes)
                {
                    if (!first)
                    {
                        siloList.Append('|');
                        timeList.Append('|');
                    }
                    siloList.Append(tuple.Item1.ToParsableString());
                    timeList.Append(TraceLogger.PrintDate(tuple.Item2));
                    first = false;
                }

                tableEntry.SuspectingSilos = siloList.ToString();
                tableEntry.SuspectingTimes = timeList.ToString();
            }
            else
            {
                tableEntry.SuspectingSilos = String.Empty;
                tableEntry.SuspectingTimes = String.Empty;
            }
            tableEntry.PartitionKey = deploymentId;
            tableEntry.RowKey = SiloInstanceTableEntry.ConstructRowKey(memEntry.SiloAddress);

            return tableEntry;
        }

 private static SiloInstanceTableEntry ConvertPartial(MembershipEntry memEntry, string deploymentId)
 {
     return new SiloInstanceTableEntry
     {
         DeploymentId = deploymentId,
         IAmAliveTime = TraceLogger.PrintDate(memEntry.IAmAliveTime),
         PartitionKey = deploymentId,
         RowKey = SiloInstanceTableEntry.ConstructRowKey(memEntry.SiloAddress)
     };
 }

        private static MembershipEntry Parse(SiloInstanceTableEntry tableEntry)
        {
            var parse = new MembershipEntry
            {
                HostName = tableEntry.HostName,
                Status = (SiloStatus) Enum.Parse(typeof (SiloStatus), tableEntry.Status)
            };

            if (!string.IsNullOrEmpty(tableEntry.ProxyPort))
                parse.ProxyPort = int.Parse(tableEntry.ProxyPort);

            parse.IsPrimary = false; // there are no primaries with in Azure table.

            int port = 0;
            if (!string.IsNullOrEmpty(tableEntry.Port))
                int.TryParse(tableEntry.Port, out port);

            int gen = 0;
            if (!string.IsNullOrEmpty(tableEntry.Generation))
                int.TryParse(tableEntry.Generation, out gen);

            parse.SiloAddress = SiloAddress.New(new IPEndPoint(IPAddress.Parse(tableEntry.Address), port), gen);

            parse.RoleName = tableEntry.RoleName;
            parse.InstanceName = tableEntry.InstanceName;
            if (!string.IsNullOrEmpty(tableEntry.UpdateZone))
                parse.UpdateZone = int.Parse(tableEntry.UpdateZone);

            if (!string.IsNullOrEmpty(tableEntry.FaultZone))
                parse.FaultZone = int.Parse(tableEntry.FaultZone);

            parse.StartTime = !string.IsNullOrEmpty(tableEntry.StartTime) ? 
                TraceLogger.ParseDate(tableEntry.StartTime) : default(DateTime);

            parse.IAmAliveTime = !string.IsNullOrEmpty(tableEntry.IAmAliveTime) ?
                TraceLogger.ParseDate(tableEntry.IAmAliveTime) : default(DateTime);

            var suspectingSilos = new List<SiloAddress>();
            var suspectingTimes = new List<DateTime>();

            if (!string.IsNullOrEmpty(tableEntry.SuspectingSilos))
            {
                string[] silos = tableEntry.SuspectingSilos.Split('|');
                foreach (string silo in silos)
                {
                    suspectingSilos.Add(SiloAddress.FromParsableString(silo));
                }
            }

            if (!string.IsNullOrEmpty(tableEntry.SuspectingTimes))
            {
                string[] times = tableEntry.SuspectingTimes.Split('|');
                foreach (string time in times)
                    suspectingTimes.Add(TraceLogger.ParseDate(time));
            }

            if (suspectingSilos.Count != suspectingTimes.Count)
                throw new OrleansException(String.Format("SuspectingSilos.Length of {0} as read from Azure table is not eqaul to SuspectingTimes.Length of {1}", suspectingSilos.Count, suspectingTimes.Count));

            for (int i = 0; i < suspectingSilos.Count; i++)
                parse.AddSuspector(suspectingSilos[i], suspectingTimes[i]);
            
            return parse;
        }