diff options
Diffstat (limited to 'trunk/qpid/dotnet/Qpid.Client/qms/failover/FailoverRoundRobin.cs')
| -rw-r--r-- | trunk/qpid/dotnet/Qpid.Client/qms/failover/FailoverRoundRobin.cs | 255 |
1 files changed, 0 insertions, 255 deletions
diff --git a/trunk/qpid/dotnet/Qpid.Client/qms/failover/FailoverRoundRobin.cs b/trunk/qpid/dotnet/Qpid.Client/qms/failover/FailoverRoundRobin.cs deleted file mode 100644 index 8103940fb4..0000000000 --- a/trunk/qpid/dotnet/Qpid.Client/qms/failover/FailoverRoundRobin.cs +++ /dev/null @@ -1,255 +0,0 @@ -/* - * - * Licensed to the Apache Software Foundation (ASF) under one - * or more contributor license agreements. See the NOTICE file - * distributed with this work for additional information - * regarding copyright ownership. The ASF licenses this file - * to you under the Apache License, Version 2.0 (the - * "License"); you may not use this file except in compliance - * with the License. You may obtain a copy of the License at - * - * http://www.apache.org/licenses/LICENSE-2.0 - * - * Unless required by applicable law or agreed to in writing, - * software distributed under the License is distributed on an - * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY - * KIND, either express or implied. See the License for the - * specific language governing permissions and limitations - * under the License. - * - */ -using System; -using System.Text; -using log4net; - -namespace Apache.Qpid.Client.Qms.Failover -{ - public class FailoverRoundRobin : IFailoverMethod - { - private static readonly ILog _logger = LogManager.GetLogger(typeof(FailoverRoundRobin)); - - /** The default number of times to cycle through all servers */ - public const int DEFAULT_CYCLE_RETRIES = 0; - /** The default number of times to retry each server */ - public const int DEFAULT_SERVER_RETRIES = 0; - - /** - * The index into the hostDetails array of the broker to which we are connected - */ - private int _currentBrokerIndex = -1; - - /** - * The number of times to retry connecting for each server - */ - private int _serverRetries; - - /** - * The current number of retry attempts made - */ - private int _currentServerRetry; - - /** - * The number of times to cycle through the servers - */ - private int _cycleRetries; - - /** - * The current number of cycles performed. - */ - private int _currentCycleRetries; - - /** - * Array of BrokerDetail used to make connections. - */ - private IConnectionInfo _connectionDetails; - - public FailoverRoundRobin(IConnectionInfo connectionDetails) - { - if (!(connectionDetails.BrokerCount > 0)) - { - throw new ArgumentException("At least one broker details must be specified."); - } - - _connectionDetails = connectionDetails; - - //There is no current broker at startup so set it to -1. - _currentBrokerIndex = -1; - - String cycleRetries = _connectionDetails.GetFailoverOption(ConnectionUrlConstants.OPTIONS_FAILOVER_CYCLE); - - if (cycleRetries != null) - { - try - { - _cycleRetries = int.Parse(cycleRetries); - } - catch (FormatException) - { - _cycleRetries = DEFAULT_CYCLE_RETRIES; - } - } - - _currentCycleRetries = 0; - - _serverRetries = 0; - _currentServerRetry = -1; - } - - public void Reset() - { - _currentBrokerIndex = 0; - _currentCycleRetries = 0; - _currentServerRetry = -1; - } - - public bool FailoverAllowed() - { - return ((_currentCycleRetries < _cycleRetries) - || (_currentServerRetry < _serverRetries) - || (_currentBrokerIndex < (_connectionDetails.BrokerCount - 1))); - } - - public void AttainedConnection() - { - _currentCycleRetries = 0; - _currentServerRetry = -1; - } - - public IBrokerInfo GetCurrentBrokerInfo() - { - if (_currentBrokerIndex == -1) - { - return null; - } - - return _connectionDetails.GetBrokerInfo(_currentBrokerIndex); - } - - public IBrokerInfo GetNextBrokerDetails() - { - if (_currentBrokerIndex == (_connectionDetails.BrokerCount - 1)) - { - if (_currentServerRetry < _serverRetries) - { - if (_currentBrokerIndex == -1) - { - _currentBrokerIndex = 0; - - SetBroker(_connectionDetails.GetBrokerInfo(_currentBrokerIndex )); - - _logger.Info("First Run using " + _connectionDetails.GetBrokerInfo(_currentBrokerIndex)); - } - else - { - _logger.Info("Retrying " + _connectionDetails.GetBrokerInfo(_currentBrokerIndex)); - } - - _currentServerRetry++; - } - else - { - _currentCycleRetries++; - //failed to connect to first broker - _currentBrokerIndex = 0; - - SetBroker(_connectionDetails.GetBrokerInfo(_currentBrokerIndex )); - - // This is zero rather than -1 as we are already retrieving the details. - _currentServerRetry = 0; - } - //else - should force client to stop as max retries has been reached. - } - else - { - if (_currentServerRetry < _serverRetries) - { - if (_currentBrokerIndex == -1) - { - _currentBrokerIndex = 0; - - SetBroker(_connectionDetails.GetBrokerInfo(_currentBrokerIndex )); - - _logger.Info("First Run using " + _connectionDetails.GetBrokerInfo(_currentBrokerIndex)); - } - else - { - _logger.Info("Retrying " + _connectionDetails.GetBrokerInfo(_currentBrokerIndex)); - } - _currentServerRetry++; - } - else - { - _currentBrokerIndex++; - - SetBroker(_connectionDetails.GetBrokerInfo(_currentBrokerIndex )); - // This is zero rather than -1 as we are already retrieving the details. - _currentServerRetry = 0; - } - } - - return _connectionDetails.GetBrokerInfo(_currentBrokerIndex); - } - - public void SetBroker(IBrokerInfo broker) - { - _connectionDetails.AddBrokerInfo(broker); - - int index = _connectionDetails.GetAllBrokerInfos().IndexOf(broker); - - String serverRetries = broker.GetOption(BrokerInfoConstants.OPTIONS_RETRY); - - if (serverRetries != null) - { - try - { - _serverRetries = int.Parse(serverRetries); - } - catch (FormatException) - { - _serverRetries = DEFAULT_SERVER_RETRIES; - } - } - - _currentServerRetry = -1; - _currentBrokerIndex = index; - } - - public void SetRetries(int maxRetries) - { - _cycleRetries = maxRetries; - } - - public String MethodName - { - get { return "Cycle Servers"; } - } - - public override string ToString() - { - StringBuilder sb = new StringBuilder(); - - sb.Append(GetType().Name).Append("\n"); - - sb.Append("Broker count: ").Append(_connectionDetails.BrokerCount); - sb.Append("\ncurrent broker index: ").Append(_currentBrokerIndex); - - sb.Append("\nCycle Retries: ").Append(_cycleRetries); - sb.Append("\nCurrent Cycle:").Append(_currentCycleRetries); - sb.Append("\nServer Retries:").Append(_serverRetries); - sb.Append("\nCurrent Retry:").Append(_currentServerRetry); - sb.Append("\n"); - - for(int i=0; i < _connectionDetails.BrokerCount ; i++) - { - if (i == _currentBrokerIndex) - { - sb.Append(">"); - } - sb.Append(_connectionDetails.GetBrokerInfo(i)); - sb.Append("\n"); - } - - return sb.ToString(); - } - } -} |