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/*
* @(#) AutoDeployMonitor.java
*
* Copyright 2000-2001 by iPlanet/Sun Microsystems, Inc.,
* 901 San Antonio Road, Palo Alto, California, 94303, U.S.A.
* All rights reserved.
*
* This software is the confidential and proprietary information
* of iPlanet/Sun Microsystems, Inc. ("Confidential Information").
* You shall not disclose such Confidential Information and shall
* use it only in accordance with the terms of the license
* agreement you entered into with iPlanet/Sun Microsystems.
*/
package com.sun.enterprise.server;
import java.io.File;
import java.util.Iterator;
import com.sun.enterprise.util.io.FileUtils;
import java.util.logging.Level;
import java.util.logging.Logger;
import com.sun.logging.LogDomains;
/**
* Monitors the auto deploy directory for new archives.
*
* @atuthor Nazrul Islam
* @since JDK 1.4
*/
class AutoDeployMonitor extends AbstractMonitor {
/** logger for this auto deploy monitor */
static Logger _logger = LogDomains.getLogger(LogDomains.CORE_LOGGER);
/** singleton instance */
private static AutoDeployMonitor _instance = null;
/** filter for the archives */
private static ArchiveFilter _archiveFilter = null;
/** suffix added to the archives when deployed successfully */
private static final String SUCCESS_EXT = ".deployed";
/** suffix added to the archives when not deployed */
private static final String ERROR_EXT = ".notdeployed";
/**
* Constructor - prohibits anyone from constructing this object.
*
* @param pollInterval polling interval
*/
private AutoDeployMonitor(long pollInterval) {
super(pollInterval);
}
/**
* Returns the singleton instance. If the object was not created already,
* it uses the given polling interval.
*
* @param pollInterval polling interval
*/
static synchronized AutoDeployMonitor getInstance(long pollInterval) {
if (_instance == null) {
_instance = new AutoDeployMonitor(pollInterval);
_archiveFilter = new ArchiveFilter();
}
return _instance;
}
/**
* Periodically monitors the auto deploy directory of a server.
* If any new archive is detected, this monitor makes a callback
* to the listener provided in the monitorable entry.
*
* <p> This method checks the file extension of the archives found
* under the auto deploy directory. If the file extensions are .ear,
* .jar, .war, or .rar, it makes a callback to the listener.
* It is assumed that after processing the callback the handler will
* rename the archive with proper extension. For example, for a successful
* deployment, foo.ear may be renamed to foo.ear.deployed.
*
*/
public void run() {
try {
synchronized (_monitoredEntries) {
Iterator iter = _monitoredEntries.iterator();
MonitorableEntry entry = null;
// should be only one entry encapsulating the auto deploy dir
while (iter.hasNext()) {
entry = (MonitorableEntry) iter.next();
File autoDeployDir = entry.getMonitoredFile();
File[] archives = autoDeployDir.listFiles(_archiveFilter);
if ( (archives == null) || (archives.length == 0) ) {
// no new archive
return;
}
MonitorListener l = entry.getListener();
for (int i=0; i<archives.length; i++) {
_logger.log(Level.FINE,
"[AutoDeployMonitor] Found " + archives[i]);
boolean success = l.deploy(entry, archives[i]);
if (success) {
File successExt =
new File(archives[i].getParentFile(),
archives[i].getName()+SUCCESS_EXT);
archives[i].renameTo(successExt);
} else {
File errorExt =
new File(archives[i].getParentFile(),
archives[i].getName()+ERROR_EXT);
archives[i].renameTo(errorExt);
}
}
}
}
} catch (Throwable t) {
// catches any uncaught exceptions thrown from the handlers
_logger.log(Level.WARNING, "core.exception", t);
}
}
/**
* A filter for deployable archives.
*/
private static class ArchiveFilter implements java.io.FileFilter {
/**
* Returns true if the given file is an ear, jar, war or rar.
*
* @param pathname file to be tested
* @return true if the given file is an ear, jar, war or rar
*/
public boolean accept(File pathname) {
if ( FileUtils.isEar(pathname)
|| FileUtils.isJar(pathname)
|| FileUtils.isWar(pathname)
|| FileUtils.isRar(pathname) ) {
return true;
} else {
return false;
}
}
}
}
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