/// <summary>
/// Disposes the object via a special disposing task that is executed with the exclusive scheduler.
/// </summary>
public void Dispose()
{
this.disposed = true;
if (this.singleThread == null)
{
return;
}
ManualResetEventSlim cleaned = new ManualResetEventSlim();
new Task(() =>
{
if (this.Transaction != null)
{
this.transaction.Dispose();
this.transaction = null;
}
if (this.engine != null)
{
this.engine.Dispose();
this.engine = null;
}
this.singleThread.Dispose();
this.singleThread = null;
cleaned.Set();
}).Start(this.singleThread);
cleaned.Wait();
}
/// <summary>
/// Initializes a new instance of the object.
/// <para>It creates an exclusive scheduler for tasks accessing database and initializes the database engine on disk.</para>
/// </summary>
/// <param name="threadName">Name of the exclusive thread that will care about tasks accessing the database in exclusive manner.</param>
/// <param name="folder">Path to the directory to hold DBreeze database files.</param>
public DBreezeSingleThreadSession(string threadName, string folder)
{
Guard.NotEmpty(threadName, nameof(threadName));
Guard.NotEmpty(folder, nameof(folder));
this.singleThread = new CustomThreadPoolTaskScheduler(1, 100, threadName);
new Task(() =>
{
DBreeze.Utils.CustomSerializator.ByteArraySerializator = NBitcoinSerialize;
DBreeze.Utils.CustomSerializator.ByteArrayDeSerializator = NBitcoinDeserialize;
this.engine = new DBreezeEngine(folder);
this.transaction = this.engine.GetTransaction();
}).Start(this.singleThread);
}
/// <summary>
/// Initializes a new instance of the object.
/// <para>It creates an exclusive scheduler for tasks accessing database and initializes the database engine on disk.</para>
/// </summary>
/// <param name="threadName">Name of the exclusive thread that will care about tasks accessing the database in exclusive manner.</param>
/// <param name="folder">Path to the directory to hold DBreeze database files.</param>
public DBreezeSingleThreadSession(string threadName, string folder)
{
Guard.NotEmpty(threadName, nameof(threadName));
Guard.NotEmpty(folder, nameof(folder));
this.singleThread = new CustomThreadPoolTaskScheduler(1, 100, threadName);
var task = new Task(() =>
{
DBreeze.Utils.CustomSerializator.ByteArraySerializator = NBitcoinSerialize;
DBreeze.Utils.CustomSerializator.ByteArrayDeSerializator = NBitcoinDeserialize;
this.engine = new DBreezeEngine(folder);
this.transaction = this.engine.GetTransaction();
});
task.Start(this.singleThread);
// Features are loaded sequentially, this change will wait (block execution)
// after dispatching a new Task (thread) to initialize the dbreeze db.
// Node: The 'DBreezeEngine' instance is not thread safe as there are
// static initializers happening internally when creating a new instance.
task.GetAwaiter().GetResult();
}
