public static async Task <T> ExecuteWithKeyExpire <T>(this RedisStructure redisStructure, Func <IDatabaseAsync, Task <T> > command, RedisKey key, RedisExpiry expiry, CommandFlags commandFlags)
{
if (expiry == null)
{
return(await command(redisStructure.Command).ForAwait());
}
else
{
var tx = redisStructure.CreateTransaction();
var future = command(tx);
var expire = expiry.KeyExpire(tx, key, commandFlags);
await tx.ExecuteAsync(commandFlags).ForAwait();
return(await future.ForAwait());
}
}
// additional commands
/// <summary>
/// Simulate fixed size list includes LPUSH, TRIM.
/// </summary>
public Task <long> LeftPushAndFixLength(T value, long fixLength, RedisExpiry expiry = null, When when = When.Always, CommandFlags commandFlags = CommandFlags.None)
{
return(TraceHelper.RecordSendAndReceive(Settings, Key, CallType, async() =>
{
long sentSize;
var v = Settings.ValueConverter.Serialize(value, out sentSize);
var tx = CreateTransaction();
var leftpush = tx.ListLeftPushAsync(Key, v, when, commandFlags);
var trim = tx.ListTrimAsync(Key, 0, fixLength - 1, commandFlags);
if (expiry != null)
{
var expire = expiry.KeyExpire(tx, Key, commandFlags);
}
await tx.ExecuteAsync(commandFlags).ForAwait();
var r = await leftpush.ForAwait();
return Tracing.CreateSentAndReceived(new { value, fixLength, expiry = expiry?.Value, when }, sentSize, r, sizeof(long));
}));
}
