/// <summary>
/// 获取部分配置信息
/// </summary>
/// <param name="configKey">配置文件KEY名称</param>
/// <returns>如果不存在指定条件的配置文件，则返回null</returns>
/// <exception cref="ArgumentNullException">参数不能为空</exception>
public string GetPartialConfig(string configKey)
{
if (string.IsNullOrEmpty(configKey))
{
throw new ArgumentNullException("configKey");
}
#region Get cache first.
string config = null;
//has cache.
if (_configCaches.TryGetValue(configKey, out config))
{
return(config);
}
#endregion
PrepareConnection();
#region Get remote config.
CSNGetPartialConfigRequestMessage requestMessage = new CSNGetPartialConfigRequestMessage();
requestMessage.Key = configKey;
BusinessMessageTransaction transaction = _transactionManager.Create(IdentityHelper.Create((IPEndPoint)_channel.LocalEndPoint), _channel);
if (transaction == null)
{
throw new Exception("Cannot create a CSN message transaction!");
}
AutoResetEvent autoResetEvent = new AutoResetEvent(false);
transaction.ResponseArrived += delegate(object sender, LightSingleArgEventArgs <BaseMessage> e)
{
CSNGetPartialConfigResponseMessage rspMsg = (CSNGetPartialConfigResponseMessage)e.Target;
if (rspMsg.ErrorId == 0 && !string.IsNullOrEmpty(rspMsg.Config))
{
//add cache.
_configCaches[configKey] = rspMsg.Config;
config = rspMsg.Config;
}
autoResetEvent.Set();
};
transaction.Failed += delegate
{
_transactionManager.Remove(transaction.Identity);
autoResetEvent.Set();
};
transaction.Timeout += delegate
{
_transactionManager.Remove(transaction.Identity);
autoResetEvent.Set();
};
transaction.SendRequest(requestMessage);
//wait 35s.
autoResetEvent.WaitOne(35000);
autoResetEvent.Dispose();
return(config);
#endregion
}
/// <summary>
/// 获取指定表的数据
/// </summary>
/// <param name="database">数据库名</param>
/// <param name="table">表名</param>
/// <param name="hasCache">缓存标识</param>
/// <returns>返回表数据</returns>
/// <exception cref="ArgumentNullException">参数不能为空</exception>
public DataTable GetTable(string database, string table, bool hasCache)
{
DataTable result = null;
Exception exception = null;
if (hasCache)
{
//get cache by default.
if ((result = GetCacheTable(string.Format("{0}.{1}", database, table))) != null)
{
return(result);
}
}
PrepareConnection();
CSNGetDataTableRequestMessage requestMessage = new CSNGetDataTableRequestMessage();
requestMessage.DatabaseName = database;
requestMessage.TableName = table;
BusinessMessageTransaction transaction = _transactionManager.Create(IdentityHelper.Create((IPEndPoint)_channel.LocalEndPoint), _channel);
if (transaction == null)
{
throw new Exception("Cannot create a CSN message transaction!");
}
AutoResetEvent autoResetEvent = new AutoResetEvent(false);
transaction.ResponseArrived += delegate(object sender, LightSingleArgEventArgs <BaseMessage> e)
{
CSNGetDataTableResponseMessage responseMessage = (CSNGetDataTableResponseMessage)e.Target;
result = responseMessage.Tables == null ? null : responseMessage.Tables;
autoResetEvent.Set();
};
transaction.Failed += delegate
{
_transactionManager.Remove(transaction.Identity);
exception = new Exception("Failed! Cannot get table data config from CSN service, #table: " + table);
autoResetEvent.Set();
};
transaction.Timeout += delegate
{
_transactionManager.Remove(transaction.Identity);
exception = new Exception("Timeout! Cannot get table data config from CSN service, #table: " + table);
autoResetEvent.Set();
};
transaction.SendRequest(requestMessage);
//wait 35s.
autoResetEvent.WaitOne(35000);
autoResetEvent.Dispose();
if (exception != null)
{
throw exception;
}
#region Add table cahce.
if (hasCache && result != null)
{
lock (_lockTablesObj)
_cacheTables.Add(string.Format("{0}.{1}", database, table), result);
}
#endregion
return(result);
}
/// <summary>
/// 获取某个字段的值
/// </summary>
/// <typeparam name="T">字段类型</typeparam>
/// <param name="database">数据库名</param>
/// <param name="table">表名</param>
/// <param name="service">服务名称</param>
/// <param name="field">字段名</param>
/// <returns>返回相应字段的值</returns>
/// <exception cref="ArgumentNullException">参数不能为空</exception>
public string GetField(string database, string table, string service, string field)
{
string result = null;
#region Get cache first.
Dictionary <string, string> items;
//has cache.
if (_cacheKeys.TryGetValue(service, out items))
{
return(items.TryGetValue(field, out result) ? result : null);
}
#endregion
PrepareConnection();
#region Get remote config.
Exception exception = null;
CSNGetKeyDataRequestMessage requestMessage = new CSNGetKeyDataRequestMessage();
requestMessage.DatabaseName = database;
requestMessage.TableName = table;
requestMessage.ServiceName = service;
BusinessMessageTransaction transaction = _transactionManager.Create(IdentityHelper.Create((IPEndPoint)_channel.LocalEndPoint), _channel);
if (transaction == null)
{
throw new Exception("Cannot create a CSN message transaction!");
}
AutoResetEvent autoResetEvent = new AutoResetEvent(false);
transaction.ResponseArrived += delegate(object sender, LightSingleArgEventArgs <BaseMessage> e)
{
CSNGetKeyDataResponseMessage rspMessage = (CSNGetKeyDataResponseMessage)e.Target;
#region Add Cache.
Dictionary <string, string> values = new Dictionary <string, string>();
if (rspMessage.Items != null)
{
foreach (KeyValueItem item in rspMessage.Items)
{
values.Add(item.Key, item.Value);
}
_cacheKeys.Add(service, values);
}
//get result.
result = values.ContainsKey(field) ? values[field] : null;
#endregion
autoResetEvent.Set();
};
transaction.Failed += delegate
{
_transactionManager.Remove(transaction.Identity);
exception = new Exception("Failed! Cannot get key data config from CSN service, #key: " + field);
autoResetEvent.Set();
};
transaction.Timeout += delegate
{
_transactionManager.Remove(transaction.Identity);
exception = new Exception("Timeout! Cannot get key data config from CSN service, #key: " + field);
autoResetEvent.Set();
};
transaction.SendRequest(requestMessage);
//wait 35s.
autoResetEvent.WaitOne(35000);
autoResetEvent.Dispose();
if (exception != null)
{
throw exception;
}
#endregion
return(result);
}