/// <summary>
/// 传入客户端数据版本号，接口判断版本是否过期，如过期则返回异常
/// 未过期则返回变动的数据及变动类型
/// 如变动数据量很大可只返回部分数据
/// </summary>
/// <returns></returns>
public InterfaceRet ReadData(string data)
{
DataVersion version = Newtonsoft.Json.JsonConvert.DeserializeObject <DataVersion>(data);
if (ChangeLogNotifyer.CheckVersionExpires(version))
{
throw new Exception("数据版本已过期");
}
ChangeLogNotifyer logNotifyer = new ChangeLogNotifyer();
List <ChangeLog> logs = new List <ChangeLog>();
logNotifyer.GetChangeLog(version.Identifier, version.Version + 1, 10, logs);
SyncObj syncobj;
List <SyncObj> retList = new List <SyncObj>();
foreach (var log in logs)
{
syncobj = new SyncObj();
retList.Add(syncobj);
syncobj.Log = log;
if (log.ChangeType != ChangeType.ctDel)
{
syncobj.Obj = dbAccess.Get(log.Key);
}
}
_ret.data = retList;
return(_ret);
}
public static Boolean CheckVersionExpires(DataVersion version)
{
int minVersion, maxVersion;
ChangeLogNotifyer.GetVersionRange(version.Identifier, out minVersion, out maxVersion);
return(version.Version < minVersion);
}
public InterfaceRet GetNewestVersion(string data)
{
_ret.Clear();
int minVersion, maxVersion;
ChangeLogNotifyer.GetVersionRange(data, out minVersion, out maxVersion);
_ret.data = maxVersion;
return(_ret);
}
/// <summary>
/// 传入需要更新各类数据的版本号，返回最新版本号或是需要整体更新
/// 输入参数DataVersion包含客户端数据版本号
/// 返回DataVersion包含最新版本号
/// 版本号为0时表示没有变动数据
/// 版本号为-1时表示版本过期
/// </summary>
/// <returns></returns>
public InterfaceRet ReadDataVersion(string data)
{
_ret.Clear();
List <DataVersion> versions = Newtonsoft.Json.JsonConvert.DeserializeObject <List <DataVersion> >(data);
int minVersion, maxVersion;
foreach (var version in versions)
{
ChangeLogNotifyer.GetVersionRange(version.Identifier, out minVersion, out maxVersion);
if (minVersion == 0 && maxVersion == 0)//没有数据变动
{
version.Version = 0;
}
else
if (version.Version < minVersion) //数据版本过期
{
version.Version = -1;
}
else
if (version.Version > maxVersion) //异常版本
{
throw new Exception(string.Format("{0} 数据版本{1}大于服务器数据版本{2}", version.Identifier, version.Version, maxVersion));
}
else
{
version.Version = maxVersion;
}
}
_ret.data = versions;
return(_ret);
}
