public static async Task <IEnumerable <LogInfo> > PullLogs(ILogServiceClient client)
{
// 获取ShardId
var listShardsResponse = await client.ListShardsAsync(LogStoreName);
var listShardsResult = listShardsResponse.EnsureSuccess().Result;
var shardId = listShardsResult.First().ShardId;
// 获取游标
var getCursorRsponse = await client.GetCursorAsync(LogStoreName, shardId, "begin");
var getCursorResult = getCursorRsponse.EnsureSuccess().Result;
var cursor = getCursorResult.Cursor;
// 在指定分片（shard）上从游标（cursor）开始位置获取100条日志
var response = await client.PullLogsAsync(LogStoreName, shardId, cursor, 100);
var result = response.EnsureSuccess().Result;
// 获取Header上的下一条游标（cursor）位置
var nextCursor = response.GetLogCursor();
return(result.LogGroups
.SelectMany(x => x.Logs));
}
/// <summary>
/// 根据游标、数量获得日志。获得日志时必须指定 shard。
/// 如果在 storm 等情况下可以通过 LoghubClientLib 进行选举与协同消费。
/// 目前仅支持读取 PB 格式 LogGroupList 数据。
/// </summary>
/// <param name="client">client实例。</param>
/// <param name="logstoreName">日志库名称</param>
/// <param name="shardId">Shard ID</param>
/// <param name="cursor">游标，用以表示从什么位置开始读取数据，相当于起点。</param>
/// <param name="count">返回的 loggroup 数目，范围为 0~1000。</param>
/// <param name="project">项目名，此参数将覆盖 client 中默认设置。</param>
/// <returns>异步响应结果。</returns>
/// <seealso cref="ILogServiceClient.PullLogsAsync"/>
public static Task <IResponse <PullLogsResult> > PullLogsAsync(this ILogServiceClient client,
String logstoreName, Int32 shardId, String cursor, Int32 count,
String project = null)
=> client.PullLogsAsync(new PullLogsRequest(logstoreName, shardId, cursor, count)
{
ProjectName = project
});
