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package com.sun.enterprise.server.ondemand;
import java.util.*;
import java.util.logging.*;
import java.nio.channels.SelectableChannel;
import java.nio.channels.SelectionKey;
import java.nio.channels.Selector;
import com.sun.logging.LogDomains;
import com.sun.enterprise.server.*;
import com.sun.enterprise.server.ss.*;
import com.sun.enterprise.server.ondemand.entry.*;
import com.sun.appserv.server.ServerLifecycle;
import com.sun.appserv.server.LifecycleEvent;
import com.sun.appserv.server.ServerLifecycleException;
import com.sun.enterprise.server.pluggable.PluggableFeatureFactory;
import com.sun.enterprise.server.pluggable.PluggableFeatureFactoryImpl;
import com.sun.enterprise.server.pluggable.InternalServicesList;
/**
* Represents on-demand server. This is the main class that ties ondemand logic
* with rest of the application server.
*/
public class OnDemandServer extends ApplicationServer implements EntryPoint{
private static boolean onDemandStartup = true;
private static volatile ServerEntryListener listener = null;
private static volatile SystemAppLoader systemAppLoader = null;
private volatile ServiceGroup sg = null;
/**
* Server is initializing subsystems and setting up the runtime environment.
* Prepare for the beginning of active use of the public methods of this
* subsystem. This method is called before any of the public methods of
* this subsystem are utilized.
*
* @param sc ServerContext the server runtime context.
*
* @exception IllegalStateException if this subsystem has already been
* started
* @exception ServerLifecycleException if this subsystem detects a fatal
* error that prevents this subsystem from being used
*/
public void onInitialization(ServerContext context)
throws ServerLifecycleException {
listener = new ServerEntryListenerImpl(this);
ServiceGroupBuilder builder = new ServiceGroupBuilder();
sg = builder.buildServiceGroup(this);
// Start the lazy startup framework.
// This will open up network ports and block any incoming connections
// till server startup completes.
try {
super.setServerContext(context);
PluggableFeatureFactory pff = context.getPluggableFeatureFactory();
ASLazyKernel lazyStartupKernel = pff.getASLazyKernel();
onDemandStartup = lazyStartupKernel.startASSocketServices(context) ;
} catch (Exception e) {
onDemandStartup = false;
// Quick startup is not enabled. Start with normal sequence.
}
//ORB is initialized lazily. If this variable is not set,
//Naming code somehow initializes ORB.
com.sun.enterprise.naming.SerialInitContextFactory.
setInitializeOrbManager(false);
super.onInitialization(context);
try {
systemAppLoader = new SystemAppLoader();
} catch (Exception e) {
throw new ServerLifecycleException(e);
}
}
/**
* Server is starting up applications
*
* @param sc ServerContext the server runtime context.
*
* @exception ServerLifecycleException if this subsystem detects a fatal
* error that prevents this subsystem from being used
*/
public void onStartup()
throws ServerLifecycleException {
generateEntryContext(new Boolean(onDemandStartup));
super.onStartup();
}
/**
* Server is shutting down applications
*
* @exception ServerLifecycleException if this subsystem detects a fatal
* error that prevents this subsystem from being used
*/
public void onShutdown()
throws ServerLifecycleException {
super.onShutdown();
try {
sg.stop(null);
} catch (Exception e) {
throw new ServerLifecycleException(e);
}
}
public void generateEntryContext(Object event) {
ServerEntryHelper.generateStartUpEntryContext((Boolean) event);
}
protected List<ServerLifecycle>
instantiateRuntimeServices(
final ServerContext serverContext,
final String[][] defaultServices )
throws ServerLifecycleException {
if (onDemandStartup) {
InternalServicesList services = serverContext.getPluggableFeatureFactory().getInternalServicesList();
final InternalServicesList ondemandservices = new OnDemandServices();
final String[][] servicesByName = services.getServicesByName();
final String[][] odsByName = ondemandservices.getServicesByName();
if (servicesByName == null) {
_logger.log(Level.SEVERE, "services.null");
throw new ServerLifecycleException();
}
final List<ServerLifecycle> serviceList = new ArrayList<ServerLifecycle>();
// Instantiate service objects
allServices :
for (final String[] service : servicesByName) {
for (final String[] ods : odsByName) {
if (service[0].equals(ods[0])) {
continue allServices;
}
}
try {
final ServerLifecycle serverLifecycle =
super.instantiateOneServerLifecycle( serverContext, service[1] );
serviceList.add( serverLifecycle );
} catch (Exception ex) {
_logger.log(Level.SEVERE, "server.exception", ex);
throw new ServerLifecycleException(ex.getMessage());
}
}
return serviceList;
} else {
return super.instantiateRuntimeServices( serverContext, defaultServices);
}
}
// Return the server entry listener.
public static ServerEntryListener getServerEntryListener() {
return listener;
}
// Return the system apploader.
public static SystemAppLoader getSystemAppLoader() {
return systemAppLoader;
}
// Return the main service group.
public ServiceGroup getServiceGroup() {
return sg;
}
public static boolean isOnDemandOff() {
return onDemandStartup == false;
}
// Retrieves the key representing the channel's registration
// with the given selector. Work around for 6562829.
public static SelectionKey keyFor(SelectableChannel channel, Selector sel) {
if (onDemandStartup == false) {
return channel.keyFor(sel);
}
return ASSocketService.keyFor(channel, sel);
}
}
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