/// <summary>
/// Create new instance of log commit manager
/// </summary>
/// <param name="deviceFactory">Factory for getting devices</param>
/// <param name="checkpointNamingScheme">Checkpoint naming helper</param>
/// <param name="overwriteLogCommits">Overwrite same FASTER log commits each time</param>
/// <param name="removeOutdated">Remote older FASTER log commits</param>
public DeviceLogCommitCheckpointManager(INamedDeviceFactory deviceFactory, ICheckpointNamingScheme checkpointNamingScheme, bool overwriteLogCommits = true, bool removeOutdated = false)
{
this.deviceFactory = deviceFactory;
this.checkpointNamingScheme = checkpointNamingScheme;
this.commitNum = 0;
this.semaphore = new SemaphoreSlim(0);
this.overwriteLogCommits = overwriteLogCommits;
this.removeOutdated = removeOutdated;
deviceFactory.Initialize(checkpointNamingScheme.BaseName());
}
/// <summary>
/// Create new instance of log commit manager
/// </summary>
/// <param name="deviceFactory">Factory for getting devices</param>
/// <param name="checkpointNamingScheme">Checkpoint naming helper</param>
/// <param name="removeOutdated">Remote older FASTER log commits</param>
public DeviceLogCommitCheckpointManager(INamedDeviceFactory deviceFactory, ICheckpointNamingScheme checkpointNamingScheme, bool removeOutdated = true)
{
this.deviceFactory = deviceFactory;
this.checkpointNamingScheme = checkpointNamingScheme;
this.semaphore = new SemaphoreSlim(0);
this.removeOutdated = removeOutdated;
if (removeOutdated)
{
// We keep two index checkpoints as the latest index might not have a
// later log checkpoint to work with
indexTokenHistory = new Guid[indexTokenCount];
// We only keep the latest log checkpoint
logTokenHistory = new Guid[logTokenCount];
// // We only keep the latest FasterLog commit
flogCommitHistory = new long[flogCommitCount];
}
deviceFactory.Initialize(checkpointNamingScheme.BaseName());
}
/// <summary>
/// Create new instance of log commit manager
/// </summary>
/// <param name="deviceFactory">Factory for getting devices</param>
/// <param name="checkpointNamingScheme">Checkpoint naming helper</param>
/// <param name="overwriteLogCommits">Overwrite same FASTER log commits each time</param>
/// <param name="removeOutdated">Remote older FASTER log commits</param>
public DeviceLogCommitCheckpointManager(INamedDeviceFactory deviceFactory, ICheckpointNamingScheme checkpointNamingScheme, bool overwriteLogCommits = true, bool removeOutdated = false)
{
this.deviceFactory = deviceFactory;
this.checkpointNamingScheme = checkpointNamingScheme;
this.commitNum = 0;
this.semaphore = new SemaphoreSlim(0);
this.overwriteLogCommits = overwriteLogCommits;
this.removeOutdated = removeOutdated;
if (removeOutdated)
{
// We keep two index checkpoints as the latest index might not have a
// later log checkpoint to work with
indexTokenHistory = new Guid[2];
// We only keep the latest log checkpoint
logTokenHistory = new Guid[2];
}
this._disposed = false;
deviceFactory.Initialize(checkpointNamingScheme.BaseName());
}
/// <summary>
/// Create new instance of log commit manager
/// </summary>
/// <param name="deviceFactory">Factory for getting devices</param>
/// <param name="baseName">Overall location specifier (e.g., local path or cloud container name)</param>
/// <param name="overwriteLogCommits">Overwrite same FASTER log commits each time</param>
/// <param name="removeOutdated">Remote older FASTER log commits</param>
public DeviceLogCommitCheckpointManager(INamedDeviceFactory deviceFactory, string baseName, bool overwriteLogCommits = true, bool removeOutdated = false)
: this(deviceFactory, new DefaultCheckpointNamingScheme(baseName), overwriteLogCommits, removeOutdated)
{
}
