| /* |
| * 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.io.IOException; |
| import java.net.SocketAddress; |
| |
| import org.apache.sshd.common.Closeable; |
| import org.apache.sshd.common.util.net.ConnectionEndpointsIndicator; |
| |
| public interface IoSession extends ConnectionEndpointsIndicator, PacketWriter, Closeable { |
| |
| /** |
| * @return a unique identifier for this session. Every session has its own |
| * ID which is different from any other. |
| */ |
| long getId(); |
| |
| /** |
| * @return The service address through which this session was accepted - {@code null} |
| * if session was initiated by this peer instead of being accepted |
| */ |
| SocketAddress getAcceptanceAddress(); |
| |
| /** |
| * Returns the value of the user-defined attribute of this session. |
| * |
| * @param key the key of the attribute |
| * @return {@code null} 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 - {@code null} if it is new. |
| */ |
| Object setAttribute(Object key, Object value); |
| |
| /** |
| * Sets a user defined attribute if the attribute with the specified key |
| * is not set yet. This method is same with the following code except |
| * that the operation is performed atomically. |
| * <pre><code> |
| * if (containsAttribute(key)) { |
| * return getAttribute(key); |
| * } else { |
| * return setAttribute(key, value); |
| * } |
| * </code></pre> |
| * |
| * @param key The key of the attribute we want to set |
| * @param value The value we want to set |
| * @return The old value of the attribute - {@code null} if not found. |
| */ |
| Object setAttributeIfAbsent(Object key, Object value); |
| |
| /** |
| * Removes a user-defined attribute with the specified key. |
| * |
| * @param key The key of the attribute we want to remove |
| * @return The old value of the attribute - {@code null} if not found. |
| */ |
| Object removeAttribute(Object key); |
| |
| /** |
| * @return the {@link IoService} that created this session. |
| */ |
| IoService getService(); |
| |
| /** |
| * Handle received EOF. |
| * @throws IOException If failed to shutdown the stream |
| */ |
| void shudownOutputStream() throws IOException; |
| } |