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

   1 /*
   2  * Copyright (C) 2007-2012 Argeo GmbH
   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 package org.argeo.slc.jsch;
  17
  18 import org.apache.commons.logging.Log;
  19 import org.apache.commons.logging.LogFactory;
  20 import org.springframework.beans.factory.DisposableBean;
  21 import org.springframework.beans.factory.InitializingBean;
  22
  23 import com.jcraft.jsch.Session;
  24
  25 /** Caches a JSCH session in the the ssh target. */
  26 public class JschContextSession extends AbstractJschTask implements
  27                 InitializingBean, DisposableBean {
  28         private final static Log log = LogFactory.getLog(JschContextSession.class);
  29         private Boolean autoconnect = false;
  30
  31         @Override
  32         void run(Session session) {
  33                 // clear();
  34                 getSshTarget().setSession(session);
  35                 if (log.isDebugEnabled())
  36                         log.debug("Cached SSH context session to " + getSshTarget());
  37         }
  38
  39         public void afterPropertiesSet() throws Exception {
  40                 // if (log.isDebugEnabled())
  41                 // log.debug(getClass() + ".afterPropertiesSet(), " + beanName + ", "
  42                 // + this);
  43                 if (autoconnect)
  44                         try {
  45                                 run();
  46                         } catch (Exception e) {
  47                                 log.error("Could not automatically open session", e);
  48                         }
  49         }
  50
  51         public void destroy() throws Exception {
  52                 clear();
  53         }
  54
  55         public void clear() {
  56                 SshTarget sshTarget = getSshTarget();
  57                 synchronized (sshTarget) {
  58                         if (sshTarget.getSession() != null) {
  59                                 sshTarget.getSession().disconnect();
  60                                 sshTarget.setSession(null);
  61                                 if (log.isDebugEnabled())
  62                                         log.debug("Cleared cached SSH context session to "
  63                                                         + getSshTarget());
  64                         }
  65                 }
  66         }
  67
  68         public void setAutoconnect(Boolean autoconnect) {
  69                 this.autoconnect = autoconnect;
  70         }
  71
  72 }