Returns true if key’s channel is ready to accept a new socket connection.

Returns the set of all keys registered with sel, including those not yet ready.

Returns the attachment associated with key, or nil if none.

Returns the channel associated with key.

Removes all keys from the selected-key set after processing. Call this after all keys in selected have been handled.

Closes sel.

Returns true if key’s channel is ready to complete a connection.

Cancels key, removing its channel from the selector. The key becomes invalid immediately. The cancellation takes effect on the next select! call.

Retrieves this key’s interest set. It is guaranteed that the returned set will only contain operation bits that are valid for this key’s channel.

Returns true if sel is open.

Returns true if key’s channel is ready for reading.

Registers channel ch with selector sel for the given operations ops (a bitwise OR of op-read, op-write, op-accept, op-connect). Optionally accepts an attachment — any object — stored on the key and retrievable via (attachment key). Useful for associating per-channel state (e.g. a buffer, a handler, a connection id). Returns the resulting SelectionKey.

Selects a set of keys whose corresponding channels are ready for I/O operations. Blocks until at least one channel is ready for an operation it is registered for.

Non-blocking select. Returns immediately with the number of keys whose ready-op sets were updated since the last select call. Returns 0 if no channels are ready.

Like select!, but blocks for at most timeout-ms milliseconds. Returns the number of keys whose ready-operation sets were updated.

Returns the mutable Set of SelectionKeys that are ready.

Opens and returns a new Selector.

Updates the interest ops of key to ops. Useful for switching a channel between read and write interest mid-lifecycle, e.g. after accumulating a full response to send. Returns key.

Returns true if key is still registered with its selector.

Causes the first selection operation that has not yet returned to return immediately. Returns sel.

Returns true if key’s channel is ready for writing.