// 第一阶段：获得全部读者库记录，进入本地数据库
// result.Value
// -1 出错
// >=0 实际获得的读者记录条数
public static async Task <ReplicationPlan> DownloadAllPatronRecordAsync(CancellationToken token)
{
LibraryChannel channel = App.CurrentApp.GetChannel();
var old_timeout = channel.Timeout;
channel.Timeout = TimeSpan.FromMinutes(5); // 设置 5 分钟。因为读者记录检索需要一定时间
try
{
ReplicationPlan plan = GetReplicationPlan(channel);
if (plan.Value == -1)
{
return(plan);
}
int nRedoCount = 0;
REDO:
if (token.IsCancellationRequested)
{
return new ReplicationPlan
{
Value = -1,
ErrorInfo = "用户中断"
}
}
;
// 检索全部读者库记录
long lRet = channel.SearchReader(null, // stop,
"<all>",
"",
-1,
"__id",
"left",
"zh",
null, // strResultSetName
"", // strOutputStyle
out string strError);
if (lRet == -1)
{
// 一次重试机会
if (lRet == -1 &&
(channel.ErrorCode == ErrorCode.RequestCanceled || channel.ErrorCode == ErrorCode.RequestError) &&
nRedoCount < 2)
{
nRedoCount++;
goto REDO;
}
return(new ReplicationPlan
{
Value = -1,
ErrorInfo = strError,
ErrorCode = channel.ErrorCode.ToString()
});
}
long hitcount = lRet;
// 把超时时间改短一点
channel.Timeout = TimeSpan.FromSeconds(20);
DateTime search_time = DateTime.Now;
// 获取和存储记录
ResultSetLoader loader = new ResultSetLoader(channel,
null,
null,
$"id,xml,timestamp",
"zh");
using (BiblioCacheContext context = new BiblioCacheContext())
{
context.Database.EnsureCreated();
// 删除 Patrons 里面的已有记录
context.Patrons.RemoveRange(context.Patrons.ToList());
await context.SaveChangesAsync(token);
// loader.Prompt += this.Loader_Prompt;
if (hitcount > 0)
{
int i = 0;
foreach (DigitalPlatform.LibraryClient.localhost.Record record in loader)
{
if (token.IsCancellationRequested)
{
return new ReplicationPlan
{
Value = -1,
ErrorInfo = "用户中断"
}
}
;
PatronItem item = new PatronItem();
var result = Set(item, record, search_time);
if (result.Value == -1)
{
// TODO: 是否汇总报错信息？
continue;
}
context.Patrons.Add(item);
if ((i % 10) == 0)
{
await context.SaveChangesAsync(token);
}
i++;
}
await context.SaveChangesAsync(token);
}
}
return(new ReplicationPlan
{
Value = (int)hitcount,
StartDate = plan.StartDate
});
}
catch (Exception ex)
{
return(new ReplicationPlan
{
Value = -1,
ErrorInfo = $"DownloadAllPatronRecord() 出现异常：{ex.Message}"
});
}
finally
{
channel.Timeout = old_timeout;
App.CurrentApp.ReturnChannel(channel);
}
}
// 第一阶段：获得全部读者库记录，进入本地数据库
// result.Value
// -1 出错
// >=0 实际获得的读者记录条数
public static async Task <ReplicationPlan> DownloadAllPatronRecordAsync(
Delegate_writeLog writeLog,
CancellationToken token)
{
_inDownloadingPatron++;
// 2020/9/26
if (_inDownloadingPatron > 1)
{
_inDownloadingPatron--;
return(new ReplicationPlan
{
Value = -1,
ErrorCode = "running",
ErrorInfo = "前一次的“下载全部读者记录到本地缓存”过程还在进行中，本次触发被放弃"
});
}
writeLog?.Invoke($"开始下载全部读者记录到本地缓存");
LibraryChannel channel = App.CurrentApp.GetChannel();
var old_timeout = channel.Timeout;
channel.Timeout = TimeSpan.FromMinutes(5); // 设置 5 分钟。因为读者记录检索需要一定时间
try
{
ReplicationPlan plan = GetReplicationPlan(channel);
writeLog?.Invoke($"GetReplicationPlan() return {plan.ToString()}");
if (plan.Value == -1)
{
return(plan);
}
int nRedoCount = 0;
REDO:
if (token.IsCancellationRequested)
{
return new ReplicationPlan
{
Value = -1,
ErrorInfo = "用户中断"
}
}
;
// 检索全部读者库记录
long lRet = channel.SearchReader(null, // stop,
"<all>",
"",
-1,
"__id",
"left",
"zh",
null, // strResultSetName
"", // strOutputStyle
out string strError);
if (lRet == -1)
{
writeLog?.Invoke($"SearchReader() 出错, strError={strError}, channel.ErrorCode={channel.ErrorCode}");
// 一次重试机会
if (lRet == -1 &&
(channel.ErrorCode == ErrorCode.RequestCanceled || channel.ErrorCode == ErrorCode.RequestError) &&
nRedoCount < 2)
{
nRedoCount++;
goto REDO;
}
return(new ReplicationPlan
{
Value = -1,
ErrorInfo = strError,
ErrorCode = channel.ErrorCode.ToString()
});
}
long hitcount = lRet;
writeLog?.Invoke($"共检索命中读者记录 {hitcount} 条");
// 把超时时间改短一点
channel.Timeout = TimeSpan.FromSeconds(20);
DateTime search_time = DateTime.Now;
Hashtable pii_table = new Hashtable();
int skip_count = 0;
int error_count = 0;
// 获取和存储记录
ResultSetLoader loader = new ResultSetLoader(channel,
null,
null,
$"id,xml,timestamp",
"zh");
using (BiblioCacheContext context = new BiblioCacheContext())
{
context.Database.EnsureCreated();
// 删除 Patrons 里面的已有记录
context.Patrons.RemoveRange(context.Patrons.ToList());
await context.SaveChangesAsync(token);
// loader.Prompt += this.Loader_Prompt;
if (hitcount > 0)
{
int i = 0;
foreach (DigitalPlatform.LibraryClient.localhost.Record record in loader)
{
if (token.IsCancellationRequested)
{
return new ReplicationPlan
{
Value = -1,
ErrorInfo = "用户中断"
}
}
;
PatronItem item = new PatronItem();
// result.Value:
// -1 出错
// 0 需要跳过这条读者记录
// 1 成功
var result = Set(item, record, search_time);
if (result.Value == -1 || result.Value == 0)
{
// TODO: 是否汇总报错信息？
if (result.Value == -1)
{
writeLog?.Invoke($"Set() ({item.RecPath}) 出错: {result.ErrorInfo}");
error_count++;
}
if (result.Value == 0)
{
skip_count++;
}
continue;
}
//
if (pii_table.ContainsKey(result.PII))
{
string recpath = (string)pii_table[result.PII];
writeLog?.Invoke($"发现读者记录 {item.RecPath} 的 PII '{result.PII}' 和 {recpath} 的 PII 重复了。跳过它");
continue;
}
pii_table[result.PII] = item.RecPath;
// TODO: PII 应该是包含 OI 的严格形态
context.Patrons.Add(item);
if ((i % 10) == 0)
{
await context.SaveChangesAsync(token);
}
i++;
}
await context.SaveChangesAsync(token);
}
}
writeLog?.Invoke($"plan.StartDate='{plan.StartDate}'。skip_count={skip_count}, error_count={error_count}。返回");
return(new ReplicationPlan
{
Value = (int)hitcount,
StartDate = plan.StartDate
});
}
catch (Exception ex)
{
// 2020/9/26
writeLog?.Invoke($"DownloadAllPatronRecord() 出现异常：{ExceptionUtil.GetDebugText(ex)}");
return(new ReplicationPlan
{
Value = -1,
ErrorInfo = $"DownloadAllPatronRecord() 出现异常：{ex.Message}"
});
}
finally
{
channel.Timeout = old_timeout;
App.CurrentApp.ReturnChannel(channel);
writeLog?.Invoke($"结束下载全部读者记录到本地缓存");
_inDownloadingPatron--;
}
}