private static void Zserver_SearchSearch(object sender, SearchSearchEventArgs e)
{
string strError = "";
int nCondition = 100;
ZServerChannel zserver_channel = (ZServerChannel)sender;
if (zserver_channel == null)
{
throw new ArgumentException("zserver_channel 为空");
}
string strInstanceName = zserver_channel.EnsureProperty().GetKeyValue("i_n");
if (strInstanceName == null)
{
string strErrorText = "通道中 实例名 'i_n' 尚未初始化"; // ?? bug
LibraryManager.Log?.Error(strErrorText);
e.Result = new DigitalPlatform.Z3950.ZClient.SearchResult {
Value = -1, ErrorInfo = strErrorText
};
return;
}
Instance instance = FindZ3950Instance(strInstanceName, out strError);
if (instance == null)
{
if (string.IsNullOrEmpty(strError))
{
strError = "实例名 '" + strInstanceName + "' 不存在(或实例没有启用 Z39.50 服务)";
}
e.Result = new DigitalPlatform.Z3950.ZClient.SearchResult {
Value = -1, ErrorInfo = strError
};
return;
}
if (instance.Running == false)
{
strError = "实例 '" + instance.Name + "' 正在维护中，暂时不能访问";
nCondition = 1019; // Init/AC: System not available due to maintenance
goto ERROR1;
}
// 检查实例是否有至少一个可用数据库
if (instance.zhost.GetDbCount() == 0)
{
#if NO
string strErrorText = "实例 '" + strInstanceName + "' 没有提供可检索的数据库";
DiagFormat diag = null;
ZProcessor.SetPresentDiagRecord(ref diag,
1017, // Init/AC: No databases available for specified userId
strErrorText);
e.Diag = diag;
e.Result = new ZClient.SearchResult {
Value = -1, ErrorInfo = strErrorText
};
return;
#endif
strError = "实例 '" + instance.Name + "' 没有提供可检索的数据库";
nCondition = 1017;// Init/AC: No databases available for specified userId
goto ERROR1;
}
// 根据逆波兰表构造出 dp2 系统检索式
// return:
// -1 出错
// 0 数据库没有找到
// 1 成功
int nRet = Z3950Utility.BuildQueryXml(
instance.zhost,
e.Request.m_dbnames,
e.Request.m_rpnRoot,
zserver_channel.EnsureProperty().SearchTermEncoding,
out string strQueryXml,
out strError);
if (nRet == -1 || nRet == 0)
{
#if NO
DiagFormat diag = null;
ZProcessor.SetPresentDiagRecord(ref diag,
nRet == -1 ? 2 : 235, // 2:temporary system error; 235:Database does not exist (database name)
strError);
e.Diag = diag;
e.Result = new ZClient.SearchResult {
Value = -1, ErrorInfo = strError
};
return;
#endif
nCondition = nRet == -1 ? 2 : 235; // 2:temporary system error; 235:Database does not exist (database name)
goto ERROR1;
}
string strUserName = zserver_channel.EnsureProperty().GetKeyValue("i_u");
string strPassword = zserver_channel.EnsureProperty().GetKeyValue("i_p");
LoginInfo login_info = BuildLoginInfo(strUserName, strPassword);
LibraryChannel library_channel = instance.MessageConnection.GetChannel(login_info);
try
{
// TODO: 附加到 Abort 事件。这样当事件被触发的时候，能执行 library_channel.Abort
// 全局结果集名
string resultset_name = MakeGlobalResultSetName(zserver_channel, e.Request.m_strResultSetName);
DateTime start = DateTime.Now;
// 进行检索
long lRet = 0;
zserver_channel.Tag = library_channel;
try
{
lRet = library_channel.Search(
strQueryXml,
resultset_name,
"", // strOutputStyle
out strError);
}
finally
{
zserver_channel.Tag = null;
}
// testing System.Threading.Thread.Sleep(TimeSpan.FromSeconds(6));
TimeSpan length = DateTime.Now - start;
if (length >= slow_length)
{
// TODO: TcpClient 可能为 null, 表示通道已经被切断
//string ip = TcpServer.GetClientIP(zserver_channel.TcpClient);
//string strChannelName = "ip:" + ip + ",channel:" + zserver_channel.GetHashCode();
LibraryManager.Log?.Info("通道 " + zserver_channel.GetDebugName(zserver_channel.TcpClient) + " 检索式 '" + strQueryXml + "' 检索耗时 " + length.ToString() + " (命中记录 " + lRet + ")，超过慢速阈值");
}
if (lRet == -1)
{
LibraryManager.Log?.Error("通道 " + zserver_channel.GetDebugName(zserver_channel.TcpClient) + " 检索式 '" + strQueryXml + "' 检索出错: " + strError);
}
/*
* // 测试检索失败
* lRet = -1;
* strError = "测试检索失败";
* */
if (lRet == -1)
{
#if NO
DiagFormat diag = null;
ZProcessor.SetPresentDiagRecord(ref diag,
2, // temporary system error
strError);
e.Diag = diag;
e.Result = new ZClient.SearchResult {
Value = -1, ErrorInfo = strError
};
return;
#endif
goto ERROR1;
}
else
{
// 记忆结果集名
// return:
// false 正常
// true 结果集数量超过 MAX_RESULTSET_COUNT，返回前已经开始释放所有结果集
if (MemoryResultSetName(zserver_channel, resultset_name) == true)
{
#if NO
DiagFormat diag = null;
ZProcessor.SetPresentDiagRecord(ref diag,
112, // Too many result sets created (maximum)
strError); // TODO: 应为 MAX_RESULTSET_COUNT
e.Diag = diag;
e.Result = new ZClient.SearchResult {
Value = -1, ErrorInfo = strError
};
return;
#endif
nCondition = 112; // Too many result sets created (maximum)
goto ERROR1;
}
e.Result = new ZClient.SearchResult {
ResultCount = lRet
};
}
return;
}
finally
{
instance.MessageConnection.ReturnChannel(library_channel);
}
ERROR1:
{
DiagFormat diag = null;
ZProcessor.SetPresentDiagRecord(ref diag,
nCondition,
strError);
e.Diag = diag;
e.Result = new ZClient.SearchResult {
Value = -1, ErrorInfo = strError
};
return;
}
}
private static void Zserver_SearchSearch(object sender, SearchSearchEventArgs e)
{
ZServerChannel zserver_channel = (ZServerChannel)sender;
string strInstanceName = zserver_channel.SetProperty().GetKeyValue("i_n");
if (strInstanceName == null)
{
string strErrorText = "通道中 实例名 '" + strInstanceName + "' 尚未初始化";
ZManager.Log?.Error(strErrorText);
e.Result = new DigitalPlatform.Z3950.ZClient.SearchResult {
Value = -1, ErrorInfo = strErrorText
};
return;
}
Instance instance = FindInstance(strInstanceName);
if (instance == null)
{
e.Result = new DigitalPlatform.Z3950.ZClient.SearchResult {
Value = -1, ErrorInfo = "实例名 '" + strInstanceName + "' 不存在"
};
return;
}
// 根据逆波兰表构造出 dp2 系统检索式
// return:
// -1 error
// 0 succeed
int nRet = Z3950Utility.BuildQueryXml(
instance.zhost,
e.Request.m_dbnames,
e.Request.m_rpnRoot,
zserver_channel.SetProperty().SearchTermEncoding,
out string strQueryXml,
out string strError);
if (nRet == -1)
{
DiagFormat diag = null;
ZProcessor.SetPresentDiagRecord(ref diag,
2, // temporary system error
strError);
e.Diag = diag;
e.Result = new ZClient.SearchResult {
Value = -1, ErrorInfo = strError
};
return;
}
string strUserName = zserver_channel.SetProperty().GetKeyValue("i_u");
string strPassword = zserver_channel.SetProperty().GetKeyValue("i_p");
LoginInfo login_info = new LoginInfo {
UserName = strUserName, Password = strPassword
};
LibraryChannel library_channel = instance.MessageConnection.GetChannel(login_info);
try
{
// 全局结果集名
string resultset_name = MakeGlobalResultSetName(zserver_channel, e.Request.m_strResultSetName);
// 进行检索
long lRet = library_channel.Search(
strQueryXml,
resultset_name,
"", // strOutputStyle
out strError);
/*
* // 测试检索失败
* lRet = -1;
* strError = "测试检索失败";
* */
if (lRet == -1)
{
DiagFormat diag = null;
ZProcessor.SetPresentDiagRecord(ref diag,
2, // temporary system error
strError);
e.Diag = diag;
e.Result = new ZClient.SearchResult {
Value = -1, ErrorInfo = strError
};
return;
}
else
{
// 记忆结果集名
MemoryResultSetName(zserver_channel, resultset_name);
e.Result = new ZClient.SearchResult {
ResultCount = lRet
};
}
}
finally
{
instance.MessageConnection.ReturnChannel(library_channel);
}
}