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using System;
using Medallion.Threading.SqlServer;
using Medallion.Threading.WaitHandles;
using Medallion.Threading.Postgres;
using Medallion.Threading.Tests;
using Medallion.Threading.Azure;
using Azure.Storage.Blobs;
using Medallion.Threading.FileSystem;
using System.IO;
using Medallion.Threading.Redis;
using StackExchange.Redis;
using System.Linq;
using Medallion.Threading;
using System.Drawing.Text;
using System.Collections.Generic;
using Medallion.Threading.ZooKeeper;
using Medallion.Threading.MySql;
#if NET471
using System.Data.SqlClient;
#elif NETCOREAPP3_1
using Microsoft.Data.SqlClient;
#endif
namespace DistributedLockTaker
{
internal static class Program
{
public static int Main(string[] args)
{
var type = args[0];
var name = args[1];
IDisposable? handle;
switch (type)
{
case nameof(SqlDistributedLock):
handle = new SqlDistributedLock(name, SqlServerCredentials.ConnectionString).Acquire();
break;
case "Write" + nameof(SqlDistributedReaderWriterLock):
handle = new SqlDistributedReaderWriterLock(name, SqlServerCredentials.ConnectionString).AcquireWriteLock();
break;
case nameof(SqlDistributedSemaphore) + "1AsMutex":
handle = new SqlDistributedSemaphore(name, maxCount: 1, connectionString: SqlServerCredentials.ConnectionString).Acquire();
break;
case nameof(SqlDistributedSemaphore) + "5AsMutex":
handle = new SqlDistributedSemaphore(name, maxCount: 5, connectionString: SqlServerCredentials.ConnectionString).Acquire();
break;
case nameof(PostgresDistributedLock):
handle = new PostgresDistributedLock(new PostgresAdvisoryLockKey(name), PostgresCredentials.GetConnectionString(Environment.CurrentDirectory)).Acquire();
break;
case "Write" + nameof(PostgresDistributedReaderWriterLock):
handle = new PostgresDistributedReaderWriterLock(new PostgresAdvisoryLockKey(name), PostgresCredentials.GetConnectionString(Environment.CurrentDirectory)).AcquireWriteLock();
break;
case nameof(MySqlDistributedLock):
handle = new MySqlDistributedLock(name, MySqlCredentials.GetConnectionString(Environment.CurrentDirectory)).Acquire();
break;
case "MariaDB" + nameof(MySqlDistributedLock):
handle = new MySqlDistributedLock(name, MariaDbCredentials.GetConnectionString(Environment.CurrentDirectory)).Acquire();
break;
case nameof(EventWaitHandleDistributedLock):
handle = new EventWaitHandleDistributedLock(name).Acquire();
break;
case nameof(WaitHandleDistributedSemaphore) + "1AsMutex":
handle = new WaitHandleDistributedSemaphore(name, maxCount: 1).Acquire();
break;
case nameof(WaitHandleDistributedSemaphore) + "5AsMutex":
handle = new WaitHandleDistributedSemaphore(name, maxCount: 5).Acquire();
break;
case nameof(AzureBlobLeaseDistributedLock):
handle = new AzureBlobLeaseDistributedLock(
new BlobClient(AzureCredentials.ConnectionString, AzureCredentials.DefaultBlobContainerName, name),
o => o.Duration(TimeSpan.FromSeconds(15))
)
.Acquire();
break;
case nameof(FileDistributedLock):
handle = new FileDistributedLock(new FileInfo(name)).Acquire();
break;
case nameof(RedisDistributedLock) + "1":
handle = AcquireRedisLock(name, serverCount: 1);
break;
case nameof(RedisDistributedLock) + "3":
handle = AcquireRedisLock(name, serverCount: 3);
break;
case nameof(RedisDistributedLock) + "2x1":
handle = AcquireRedisLock(name, serverCount: 2); // we know the last will fail; don't bother (we also don't know its port)
break;
case nameof(RedisDistributedLock) + "1WithPrefix":
handle = AcquireRedisLock("distributed_locks:" + name, serverCount: 1);
break;
case "Write" + nameof(RedisDistributedReaderWriterLock) + "1":
handle = AcquireRedisWriteLock(name, serverCount: 1);
break;
case "Write" + nameof(RedisDistributedReaderWriterLock) + "3":
handle = AcquireRedisWriteLock(name, serverCount: 3);
break;
case "Write" + nameof(RedisDistributedReaderWriterLock) + "2x1":
handle = AcquireRedisWriteLock(name, serverCount: 2); // we know the last will fail; don't bother (we also don't know its port)
break;
case "Write" + nameof(RedisDistributedReaderWriterLock) + "1WithPrefix":
handle = AcquireRedisWriteLock("distributed_locks:" + name, serverCount: 1);
break;
case string _ when type.StartsWith(nameof(RedisDistributedSemaphore)):
{
var maxCount = type.EndsWith("1AsMutex") ? 1
: type.EndsWith("5AsMutex") ? 5
: throw new ArgumentException(type);
handle = new RedisDistributedSemaphore(
name,
maxCount,
GetRedisDatabases(serverCount: 1).Single(),
// in order to see abandonment work in a reasonable timeframe, use very short expiry
options => options.Expiry(TimeSpan.FromSeconds(1))
.BusyWaitSleepTime(TimeSpan.FromSeconds(.1), TimeSpan.FromSeconds(.3))
).Acquire();
break;
}
case nameof(ZooKeeperDistributedLock):
handle = new ZooKeeperDistributedLock(new ZooKeeperPath(name), ZooKeeperPorts.DefaultConnectionString, options: ZooKeeperOptions).AcquireAsync().Result;
break;
case "Write" + nameof(ZooKeeperDistributedReaderWriterLock):
handle = new ZooKeeperDistributedReaderWriterLock(new ZooKeeperPath(name), ZooKeeperPorts.DefaultConnectionString, options: ZooKeeperOptions).AcquireWriteLockAsync().Result;
break;
case string _ when type.StartsWith(nameof(ZooKeeperDistributedSemaphore)):
{
var maxCount = type.EndsWith("1AsMutex") ? 1
: type.EndsWith("5AsMutex") ? 5
: throw new ArgumentException(type);
handle = new ZooKeeperDistributedSemaphore(
new ZooKeeperPath(name),
maxCount,
ZooKeeperPorts.DefaultConnectionString,
options: ZooKeeperOptions
).AcquireAsync().Result;
break;
}
default:
Console.Error.WriteLine($"type: {type}");
return 123;
}
Console.WriteLine("Acquired");
Console.Out.Flush();
if (Console.ReadLine() != "abandon")
{
handle.Dispose();
}
return 0;
}
private static IDistributedSynchronizationHandle AcquireRedisLock(string name, int serverCount) =>
new RedisDistributedLock(name, GetRedisDatabases(serverCount), RedisOptions).Acquire();
private static IDistributedSynchronizationHandle AcquireRedisWriteLock(string name, int serverCount) =>
new RedisDistributedReaderWriterLock(name, GetRedisDatabases(serverCount), RedisOptions).AcquireWriteLock();
private static IEnumerable<IDatabase> GetRedisDatabases(int serverCount) => RedisPorts.DefaultPorts.Take(serverCount)
.Select(port => ConnectionMultiplexer.Connect($"localhost:{port}").GetDatabase());
private static void RedisOptions(RedisDistributedSynchronizationOptionsBuilder options) =>
options.Expiry(TimeSpan.FromSeconds(.5)) // short expiry for abandonment testing
.BusyWaitSleepTime(TimeSpan.FromSeconds(.1), TimeSpan.FromSeconds(.3));
private static void ZooKeeperOptions(ZooKeeperDistributedSynchronizationOptionsBuilder options) =>
// use a very short session timeout to support abandonment
options.SessionTimeout(TimeSpan.FromSeconds(.1));
}
}
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