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package com.sun.enterprise.server;
import java.io.*;
import java.util.*;
import java.util.logging.*;
import com.sun.enterprise.config.serverbeans.WebModule;
import com.sun.enterprise.config.serverbeans.ApplicationHelper;
import com.sun.enterprise.config.ConfigContext;
import com.sun.enterprise.config.ConfigBean;
import com.sun.enterprise.config.ConfigException;
import com.sun.enterprise.config.serverbeans.ApplicationRef;
import com.sun.enterprise.config.serverbeans.Server;
import com.sun.enterprise.config.serverbeans.ServerBeansFactory;
import com.sun.enterprise.admin.server.core.AdminService;
import com.sun.enterprise.deployment.backend.DeploymentRequest;
import com.sun.enterprise.deployment.backend.DeploymentCommand;
import com.sun.enterprise.deployment.backend.DeployableObjectType;
import com.sun.enterprise.instance.BaseManager;
import com.sun.enterprise.instance.InstanceEnvironment;
import com.sun.enterprise.deployment.autodeploy.AutoDirReDeployer;
import com.sun.enterprise.deployment.backend.IASDeploymentException;
import com.sun.enterprise.util.i18n.StringManager;
import com.sun.logging.LogDomains;
import com.sun.enterprise.instance.WebModulesManager;
import com.sun.enterprise.instance.InstanceFactory;
/**
* Implements the reload callbacks for standalone web modules.
*
* When dynamic reloading is enabled, this object adds the list of enabled
* standalone web modules to the reload monitor thread, so that web module
* reload via 'touch .reload' works.
*
* This class lives in the com.sun.enterprise.server package and not the
* com.sun.enterprise.web package because of the scope of the interface/methods
* in - ReloadMonitor, MonitorableEntry and MonitorListener.
*/
public final class StandaloneWebModulesManager implements MonitorListener {
ReloadMonitor reloadMonitor;
// ------------------------------------------------------------ Constructor
/**
* Standard constructor.
*
* @param id The web container object identifier
* @param modulesRoot The top level directory under which all standalone
* modules are deployed at.
* @param pollInterval The interval at which dynamic reloading is performed
*/
public StandaloneWebModulesManager(String id, String modulesRoot,
long pollInterval) {
_id = id;
_modulesRoot = modulesRoot;
start(pollInterval);
}
// ----------------------------------------------------- Instance Variables
/**
* The id of this object (this is the same as that of the id of the
* associated web container object).
*/
private String _id = null;
/**
* Absolute path for location where all the deployed
* standalone modules are stored for this Server Instance.
*/
private String _modulesRoot = null;
/**
* List of web module ids registered with the reload monitor thread.
*/
private ArrayList _reloadables = new ArrayList();
// --------------------------------------------------------- Public Methods
/**
* Enable dynamic reloading (via the .reload file) for all the
* standalone web-modules that are marked as enabled
*
* This method is invoked be WebContainer.start() only when
* dynamic reloading has been enabled in server.xml.
*/
public void start(long pollInterval) {
reloadMonitor = ReloadMonitor.getInstance(pollInterval * 1000);
}
/**
* Remove the modules (that were previously registered by start()) from
* the reload monitor thread.
*
* This method is invoked be WebContainer.stop() only when
* dynamic reloading has been enabled in server.xml.
*/
public void stop() {
ReloadMonitor reloadMonitor = ReloadMonitor.getInstance(1);
for (int i = 0; i < _reloadables.size(); i++) {
String id = (String) _reloadables.get(i);
reloadMonitor.removeMonitoredEntry(id);
}
_reloadables.clear();
_reloadables = null;
}
// ------------------------------------------------ MonitorListener Methods
/**
* Callback from the reload monitor thread for a web module.
*
* This is done when the user updates the $MODULE_ROOT/$MODULE/.reload
* file indicating the server runtime for a dynamic reload.
*
* @param entry entry thats being monitored
*
* @return true if application was reloaded successfully
*/
public boolean reload(MonitorableEntry entry) {
// The actual reload is done by the NSAPI reconfiguration logic which
// the reload monitor thread invokes (at the end), so simply return
// true here.
InstanceEnvironment ienv = ApplicationServer.getServerContext().getInstanceEnvironment();
//4926513 work-around --- use displayname
// for "foo", the id will be "foo[0]"
//String moduleName = entry.getId();
String moduleName = entry.getDisplayName();
boolean status = false;
try {
DeploymentRequest req = new DeploymentRequest(ienv, DeployableObjectType.WEB, DeploymentCommand.DEPLOY);
// monitored file points to $APP_ROOT/.reload
req.setFileSource(entry.getMonitoredFile().getParentFile());
// application registration name
req.setName(moduleName);
// we are always trying a redeployment
req.setForced(true);
AutoDirReDeployer deployer = new AutoDirReDeployer(req);
status = deployer.redeploy();
} catch (IASDeploymentException de) {
_logger.log(Level.WARNING,"core.error_in_reload_war_module",de);
return false;
}
return status;
}
/**
* Callback from the auto deploy monitor when a new archive is detected.
*
* @param entry entry thats being monitored
* @param archive newly detected archive under the auto deploy directory
*
* @return true if archive was deployed successfully
*/
public boolean deploy(MonitorableEntry entry, File archive) {
// auto-deploy has not been implemented in S1AS7
return false;
}
/**
* Adds the given WebModule to the list of monitorable entries for
* dynamic reloading.
*
* @param wm The WebModule to add to the list of monitorable entries for
* dynamic reloading
*/
public void addWebModule(WebModule wm) {
if (wm != null && isEnabled(wm.getConfigContext(), wm.getName())) {
String name = wm.getName();
String id = name + "[" + _id + "]";
String fileName = getReloadFilename(wm);
MonitorableEntry entry = new MonitorableEntry(id, name,
new File(fileName),
this);
_reloadables.add(id);
reloadMonitor.addMonitorableEntry(entry);
}
}
/**
* Whether or not a component (either an application or a module) should be
* enabled is defined by the "enable" attribute on both the
* application/module element and the application-ref element.
*
* @param config The dynamic ConfigContext
* @param moduleName The name of the component
* @return boolean
*/
protected boolean isEnabled (ConfigContext config, String moduleName) {
try {
if (config == null) {
config = AdminService.getAdminService().getAdminContext().getAdminConfigContext();
}
ConfigBean app = ApplicationHelper.findApplication(config,
moduleName);
Server server = ServerBeansFactory.getServerBean(config);
ApplicationRef appRef = server.getApplicationRefByRef(moduleName);
return ((app != null && app.isEnabled()) &&
(appRef != null && appRef.isEnabled()));
} catch (ConfigException e) {
_logger.log(Level.FINE, "Error in finding " + moduleName, e);
//If there is anything wrong, do not enable the module
return false;
}
}
/**
* Adds the given WebModule instances to the list of monitorable entries
* for dynamic reloading.
*
* @param modules The array of WebModule instances to add to the list of
* monitorable entries for dynamic reloading
*/
public void addWebModules(WebModule[] modules) {
if (modules != null && modules.length > 0) {
for (int i = 0; i < modules.length; i++) {
addWebModule(modules[i]);
}
}
}
/**
* Returns the absolute pathname to the .reload file in the
* specified web module's directory.
*/
private String getReloadFilename(WebModule wm) {
String path = wm.getLocation();
File dir = new File(path);
if (!dir.isAbsolute())
path = _modulesRoot + "/" + path;
return path + "/" + ReloadMonitor.RELOAD_FILE;
}
/** logger to log core messages */
static Logger _logger = LogDomains.getLogger(LogDomains.CORE_LOGGER);
/** local string manager */
private static StringManager localStrings =
StringManager.getManager(StandAloneEJBModulesManager.class);
}
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