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 * or more contributor license agreements.  See the NOTICE file
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 * to you under the Apache License, Version 2.0 (the
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import org.apache.sshd.common.Closeable;
import org.apache.sshd.common.future.CloseFuture;
import org.apache.sshd.common.util.Buffer;

public interface IoSession extends Closeable {

     * Returns a unique identifier for this session.  Every session has its own
     * ID which is different from each other.

    long getId();

     * Returns the value of the user-defined attribute of this session.
     * @param key the key of the attribute
     * @return <tt>null</tt> if there is no attribute with the specified key

    Object getAttribute(Object key);

     * Sets a user-defined attribute.
     * @param key   the key of the attribute
     * @param value the value of the attribute
     * @return The old value of the attribute.  <tt>null</tt> if it is new.

    Object setAttribute(Object key, Object value);

     * Returns the socket address of remote peer.

    SocketAddress getRemoteAddress();

     * Returns the socket address of local machine which is associated with this
     * session.

    SocketAddress getLocalAddress();

     * Write a packet on the socket.
     * Multiple writes can be issued concurrently and will be queued.

    IoWriteFuture write(Buffer buffer);

     * Closes this session immediately or after all queued write requests
     * are flushed.  This operation is asynchronous.  Wait for the returned
     * {@link CloseFuture} if you want to wait for the session actually closed.
     * @param immediately {@code true} to close this session immediately.
     *                    The pending write requests will simply be discarded.
     *                    {@code false} to close this session after all queued
     *                    write requests are flushed.

    CloseFuture close(boolean immediately);

     * Returns the IoService that created this session.

    IoService getService();