runtime/org.argeo.slc.support.simple/src/main/java/org/argeo/slc/jsch/JschContextSession.java

   1 /*
   2  * Copyright (C) 2010 Mathieu Baudier <mbaudier@argeo.org>
   3  *
   4  * Licensed under the Apache License, Version 2.0 (the "License");
   5  * you may not use this file except in compliance with the License.
   6  * You may obtain a copy of the License at
   7  *
   8  *         http://www.apache.org/licenses/LICENSE-2.0
   9  *
  10  * Unless required by applicable law or agreed to in writing, software
  11  * distributed under the License is distributed on an "AS IS" BASIS,
  12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  13  * See the License for the specific language governing permissions and
  14  * limitations under the License.
  15  */
  16
  17 package org.argeo.slc.jsch;
  18
  19 import org.apache.commons.logging.Log;
  20 import org.apache.commons.logging.LogFactory;
  21 import org.springframework.beans.factory.DisposableBean;
  22 import org.springframework.beans.factory.InitializingBean;
  23
  24 import com.jcraft.jsch.Session;
  25
  26 /** Caches a JSCH session in the the ssh target. */
  27 public class JschContextSession extends AbstractJschTask implements
  28                 InitializingBean, DisposableBean {
  29         private final static Log log = LogFactory.getLog(JschContextSession.class);
  30         private Boolean autoconnect = false;
  31
  32         @Override
  33         void run(Session session) {
  34                 // clear();
  35                 getSshTarget().setSession(session);
  36                 if (log.isDebugEnabled())
  37                         log.debug("Cached SSH context session to " + getSshTarget());
  38         }
  39
  40         public void afterPropertiesSet() throws Exception {
  41                 // if (log.isDebugEnabled())
  42                 // log.debug(getClass() + ".afterPropertiesSet(), " + beanName + ", "
  43                 // + this);
  44                 if (autoconnect)
  45                         try {
  46                                 run();
  47                         } catch (Exception e) {
  48                                 log.error("Could not automatically open session", e);
  49                         }
  50         }
  51
  52         public void destroy() throws Exception {
  53                 clear();
  54         }
  55
  56         public void clear() {
  57                 SshTarget sshTarget = getSshTarget();
  58                 synchronized (sshTarget) {
  59                         if (sshTarget.getSession() != null) {
  60                                 sshTarget.getSession().disconnect();
  61                                 sshTarget.setSession(null);
  62                                 if (log.isDebugEnabled())
  63                                         log.debug("Cleared cached SSH context session to "
  64                                                         + getSshTarget());
  65                         }
  66                 }
  67         }
  68
  69         public void setAutoconnect(Boolean autoconnect) {
  70                 this.autoconnect = autoconnect;
  71         }
  72
  73 }