/*
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance
* with the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing,
* software distributed under the License is distributed on an
* "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
* KIND, either express or implied. See the License for the
* specific language governing permissions and limitations
* under the License.
*/
package org.apache.sshd.common.io;
import java.net.SocketAddress;
import org.apache.sshd.common.Closeable;
import org.apache.sshd.common.future.CloseFuture;
import org.apache.sshd.common.util.buffer.Buffer;
public interface IoSession extends Closeable {
/**
* @return 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);
/**
* @return the socket address of remote peer.
*/
SocketAddress getRemoteAddress();
/**
* @return 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.
*
* @param buffer The {@link Buffer} with the encoded packet data
* @return The {@link IoWriteFuture} for the request
*/
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.
* @return The generated {@link CloseFuture}
*/
@Override
CloseFuture close(boolean immediately);
/**
* @return the {@link IoService} that created this session.
*/
IoService getService();
}