/// <summary>
/// Example usages of ObjectPool.
/// </summary>
private static void Main()
{
// Creating a pool with a maximum size of 25, using custom Factory method to create and
// instance of ExpensiveResource.
var pool = new ObjectPool <ExpensiveResource>(25, () => new ExpensiveResource(/* resource specific initialization */));
using (var resource = pool.GetObject())
{
// Using the resource...
resource.DoStuff();
} // Exiting the using scope will return the object back to the pool.
// Creating a pool with wrapper object for managing external resources, that is, classes
// which cannot inherit from PooledObject.
var newPool = new ObjectPool <PooledObjectWrapper <ExternalExpensiveResource> >(() =>
new PooledObjectWrapper <ExternalExpensiveResource>(CreateNewResource())
{
OnReleaseResources = ExternalResourceReleaseResource,
OnResetState = ExternalResourceResetState
});
using (var wrapper = newPool.GetObject())
{
// wrapper.InternalResource contains the object that you pooled.
wrapper.InternalResource.DoOtherStuff();
} // Exiting the using scope will return the object back to the pool.
// Creates a pool where objects which have not been used for over 2 seconds will be
// cleaned up by a dedicated thread.
var timedPool = new TimedObjectPool <ExpensiveResource>(TimeSpan.FromSeconds(2));
using (var resource = timedPool.GetObject())
{
// Using the resource...
resource.DoStuff();
} // Exiting the using scope will return the object back to the pool and record last usage.
Console.WriteLine($"Timed pool size after 0 seconds: {timedPool.ObjectsInPoolCount}"); // Should be 1
Thread.Sleep(TimeSpan.FromSeconds(4));
Console.WriteLine($"Timed pool size after 4 seconds: {timedPool.ObjectsInPoolCount}"); // Should be 0
Console.Read();
}
/// <summary>
/// Example usages of ObjectPool.
/// </summary>
private static void Main()
{
// Creating a pool with a maximum size of 25, using custom Factory method to create and
// instance of ExpensiveResource.
var pool = new ObjectPool <ExpensiveResource>(25, () => new ExpensiveResource(/* resource specific initialization */));
using (var resource = pool.GetObject())
{
// Using the resource...
resource.DoStuff();
} // Exiting the using scope will return the object back to the pool.
// Creating a pool with wrapper object for managing external resources, that is, classes
// which cannot inherit from PooledObject.
var newPool = new ObjectPool <PooledObjectWrapper <ExternalExpensiveResource> >(() =>
new PooledObjectWrapper <ExternalExpensiveResource>(CreateNewResource())
{
OnReleaseResources = ExternalResourceReleaseResource,
OnResetState = ExternalResourceResetState
});
using (var wrapper = newPool.GetObject())
{
// wrapper.InternalResource contains the object that you pooled.
wrapper.InternalResource.DoOtherStuff();
} // Exiting the using scope will return the object back to the pool.
// Creates a pool where objects which have not been used for over 2 seconds will be
// cleaned up by a dedicated thread.
var timedPool = new TimedObjectPool <ExpensiveResource>(TimeSpan.FromSeconds(2));
using (var resource = timedPool.GetObject())
{
// Using the resource...
resource.DoStuff();
} // Exiting the using scope will return the object back to the pool and record last usage.
Console.WriteLine($"Timed pool size after 0 seconds: {timedPool.ObjectsInPoolCount}"); // Should be 1
Thread.Sleep(TimeSpan.FromSeconds(4));
Console.WriteLine($"Timed pool size after 4 seconds: {timedPool.ObjectsInPoolCount}"); // Should be 0
// Adapts a timed pool to Microsoft Extensions abstraction.
var mPool = ObjectPoolAdapter.CreateForPooledObject(timedPool);
// Sample usage of Microsoft pool.
var mResource = mPool.Get();
Debug.Assert(mResource is ExpensiveResource);
mPool.Return(mResource);
// Adapts a new pool to Microsoft Extensions abstraction. This example shows how to adapt
// when object type does not extend PooledObject.
var mPool2 = ObjectPoolAdapter.Create(new ObjectPool <PooledObjectWrapper <MemoryStream> >(() => PooledObjectWrapper.Create(new MemoryStream())));
// Sample usage of second Microsoft pool.
var mResource2 = mPool2.Get();
Debug.Assert(mResource2 is MemoryStream);
mPool2.Return(mResource2);
Console.Read();
}