/// <summary>
/// Pushes a single item to a peer, and combines
/// the result locally
/// </summary>
/// <param name="peer">
/// The peer to push to
/// </param>
/// <param name="item">
/// The item to push
/// </param>
private void Push(Peer peer, Item item)
{
lock(item)
{
var output = item;
if (peer.CallCombine(item, out output))
this.db.Combine(output, out output);
else
item.Contagion /= 2;
}
}
/// <summary>
/// Handles a peer communication exception,
/// bubbling the exception up to any configured
/// event handlers
/// </summary>
/// <param name="peer">
/// The peer raising the exception
/// </param>
/// <param name="e">
/// The communication exception
/// </param>
private void HandleException(Peer peer, Exception e)
{
if (this.OnPeerException != null)
this.OnPeerException(peer, e);
}
/// <summary>
/// Handles peer communication exceptions,
/// eagerly removing failed peers from the list
/// </summary>
/// <param name="peer">
/// The peer causing the failure
/// </param>
/// <param name="e">
/// The exception that occurred
/// </param>
private void HandlePeerException(Peer peer, Exception e)
{
if (peer.ID != this.parentID)
this.peers.Remove(peer.ID);
}
/// <summary>
/// Creates a new peer instance
/// </summary>
/// <param name="id">
/// The peer's node identifier
/// </param>
/// <returns>
/// The new peer instance
/// </returns>
public Peer Create(Uri id)
{
Peer peer = new Peer(id);
if (this.OnPeerException != null)
peer.OnException += HandleException;
return peer;
}