| /* |
| * Copyright (C) 2008, Robin Rosenberg <robin.rosenberg@dewire.com> |
| * Copyright (C) 2008, Shawn O. Pearce <spearce@spearce.org> |
| * and other copyright owners as documented in the project's IP log. |
| * |
| * This program and the accompanying materials are made available |
| * under the terms of the Eclipse Distribution License v1.0 which |
| * accompanies this distribution, is reproduced below, and is |
| * available at http://www.eclipse.org/org/documents/edl-v10.php |
| * |
| * All rights reserved. |
| * |
| * Redistribution and use in source and binary forms, with or |
| * without modification, are permitted provided that the following |
| * conditions are met: |
| * |
| * - Redistributions of source code must retain the above copyright |
| * notice, this list of conditions and the following disclaimer. |
| * |
| * - Redistributions in binary form must reproduce the above |
| * copyright notice, this list of conditions and the following |
| * disclaimer in the documentation and/or other materials provided |
| * with the distribution. |
| * |
| * - Neither the name of the Eclipse Foundation, Inc. nor the |
| * names of its contributors may be used to endorse or promote |
| * products derived from this software without specific prior |
| * written permission. |
| * |
| * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND |
| * CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, |
| * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
| * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
| * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR |
| * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
| * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
| * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; |
| * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER |
| * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, |
| * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) |
| * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF |
| * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| */ |
| |
| package org.eclipse.jgit.transport; |
| |
| import com.jcraft.jsch.JSchException; |
| import com.jcraft.jsch.Session; |
| |
| /** |
| * Creates and destroys SSH connections to a remote system. |
| * <p> |
| * Different implementations of the session factory may be used to control |
| * communicating with the end-user as well as reading their personal SSH |
| * configuration settings, such as known hosts and private keys. |
| * <p> |
| * A {@link Session} must be returned to the factory that created it. Callers |
| * are encouraged to retain the SshSessionFactory for the duration of the period |
| * they are using the Session. |
| */ |
| public abstract class SshSessionFactory { |
| private static SshSessionFactory INSTANCE = new DefaultSshSessionFactory(); |
| |
| /** |
| * Get the currently configured JVM-wide factory. |
| * <p> |
| * A factory is always available. By default the factory will read from the |
| * user's <code>$HOME/.ssh</code> and assume OpenSSH compatibility. |
| * |
| * @return factory the current factory for this JVM. |
| */ |
| public static SshSessionFactory getInstance() { |
| return INSTANCE; |
| } |
| |
| /** |
| * Change the JVM-wide factory to a different implementation. |
| * |
| * @param newFactory |
| * factory for future sessions to be created through. If null the |
| * default factory will be restored.s |
| */ |
| public static void setInstance(final SshSessionFactory newFactory) { |
| if (newFactory != null) |
| INSTANCE = newFactory; |
| else |
| INSTANCE = new DefaultSshSessionFactory(); |
| } |
| |
| /** |
| * Open (or reuse) a session to a host. |
| * <p> |
| * A reasonable UserInfo that can interact with the end-user (if necessary) |
| * is installed on the returned session by this method. |
| * <p> |
| * The caller must connect the session by invoking <code>connect()</code> |
| * if it has not already been connected. |
| * |
| * @param user |
| * username to authenticate as. If null a reasonable default must |
| * be selected by the implementation. This may be |
| * <code>System.getProperty("user.name")</code>. |
| * @param pass |
| * optional user account password or passphrase. If not null a |
| * UserInfo that supplies this value to the SSH library will be |
| * configured. |
| * @param host |
| * hostname (or IP address) to connect to. Must not be null. |
| * @param port |
| * port number the server is listening for connections on. May be <= |
| * 0 to indicate the IANA registered port of 22 should be used. |
| * @return a session that can contact the remote host. |
| * @throws JSchException |
| * the session could not be created. |
| */ |
| public abstract Session getSession(String user, String pass, String host, |
| int port) throws JSchException; |
| |
| /** |
| * Close (or recycle) a session to a host. |
| * |
| * @param session |
| * a session previously obtained from this factory's |
| * {@link #getSession(String,String, String, int)} method.s |
| */ |
| public void releaseSession(final Session session) { |
| if (session.isConnected()) |
| session.disconnect(); |
| } |
| } |