Move SLC Support

[gpl/argeo-slc.git] / org.argeo.slc.support / src / org / argeo / slc / jsch / JschContextSession.java

diff --git a/org.argeo.slc.support/src/org/argeo/slc/jsch/JschContextSession.java b/org.argeo.slc.support/src/org/argeo/slc/jsch/JschContextSession.java
new file mode 100644 (file)
index 0000000..44d0bcc
--- /dev/null
+++ b/org.argeo.slc.support/src/org/argeo/slc/jsch/JschContextSession.java
@@ -0,0 +1,72 @@
+/*
+ * Copyright (C) 2007-2012 Argeo GmbH
+ *
+ * Licensed 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.argeo.slc.jsch;
+
+import org.apache.commons.logging.Log;
+import org.apache.commons.logging.LogFactory;
+import org.springframework.beans.factory.DisposableBean;
+import org.springframework.beans.factory.InitializingBean;
+
+import com.jcraft.jsch.Session;
+
+/** Caches a JSCH session in the the ssh target. */
+public class JschContextSession extends AbstractJschTask implements
+               InitializingBean, DisposableBean {
+       private final static Log log = LogFactory.getLog(JschContextSession.class);
+       private Boolean autoconnect = false;
+
+       @Override
+       void run(Session session) {
+               // clear();
+               getSshTarget().setSession(session);
+               if (log.isDebugEnabled())
+                       log.debug("Cached SSH context session to " + getSshTarget());
+       }
+
+       public void afterPropertiesSet() throws Exception {
+               // if (log.isDebugEnabled())
+               // log.debug(getClass() + ".afterPropertiesSet(), " + beanName + ", "
+               // + this);
+               if (autoconnect)
+                       try {
+                               run();
+                       } catch (Exception e) {
+                               log.error("Could not automatically open session", e);
+                       }
+       }
+
+       public void destroy() throws Exception {
+               clear();
+       }
+
+       public void clear() {
+               SshTarget sshTarget = getSshTarget();
+               synchronized (sshTarget) {
+                       if (sshTarget.getSession() != null) {
+                               sshTarget.getSession().disconnect();
+                               sshTarget.setSession(null);
+                               if (log.isDebugEnabled())
+                                       log.debug("Cleared cached SSH context session to "
+                                                       + getSshTarget());
+                       }
+               }
+       }
+
+       public void setAutoconnect(Boolean autoconnect) {
+               this.autoconnect = autoconnect;
+       }
+
+}