/*******************************************************************************
* Copyright (c) 2010, 2014 Sonatype, Inc.
* All rights reserved. This program and the accompanying materials
* are made available under the terms of the Eclipse Public License v1.0
* which accompanies this distribution, and is available at
* http://www.eclipse.org/legal/epl-v10.html
*
* Contributors:
* Stuart McCulloch (Sonatype, Inc.) - initial API and implementation
*******************************************************************************/
package org.eclipse.sisu.launch;
import java.util.Collections;
import java.util.Map;
import javax.inject.Inject;
import org.eclipse.sisu.Parameters;
import org.eclipse.sisu.inject.MutableBeanLocator;
import org.eclipse.sisu.space.BeanScanning;
import org.eclipse.sisu.space.SpaceModule;
import org.eclipse.sisu.space.URLClassSpace;
import org.eclipse.sisu.wire.ParameterKeys;
import org.eclipse.sisu.wire.WireModule;
import com.google.inject.Binder;
import com.google.inject.Guice;
import com.google.inject.Injector;
import com.google.inject.Module;
import com.google.inject.Provides;
/**
* Bootstrap class that creates a static {@link Injector} by scanning the current class-path for beans.
*/
public final class Main
implements Module
{
// ----------------------------------------------------------------------
// Implementation fields
// ----------------------------------------------------------------------
private final Map<?, ?> properties;
private final String[] args;
// ----------------------------------------------------------------------
// Constructors
// ----------------------------------------------------------------------
private Main( final Map<?, ?> properties, final String... args )
{
this.properties = Collections.unmodifiableMap( properties );
this.args = args;
}
// ----------------------------------------------------------------------
// Public entry points
// ----------------------------------------------------------------------
public static void main( final String... args )
{
boot( System.getProperties(), args );
}
public static <T> T boot( final Class<T> type, final String... args )
{
return boot( System.getProperties(), args ).getInstance( type );
}
public static Injector boot( final Map<?, ?> properties, final String... args )
{
final BeanScanning scanning = BeanScanning.select( properties );
final Module app = wire( scanning, new Main( properties, args ) );
final Injector injector = Guice.createInjector( app );
return injector;
}
public static Module wire( final BeanScanning scanning, final Module... bindings )
{
final Module[] modules = new Module[bindings.length + 1];
System.arraycopy( bindings, 0, modules, 0, bindings.length );
final ClassLoader tccl = Thread.currentThread().getContextClassLoader();
modules[bindings.length] = new SpaceModule( new URLClassSpace( tccl ), scanning );
return new WireModule( modules );
}
// ----------------------------------------------------------------------
// Public methods
// ----------------------------------------------------------------------
public void configure( final Binder binder )
{
binder.bind( ParameterKeys.PROPERTIES ).toInstance( properties );
binder.bind( ShutdownThread.class ).asEagerSingleton();
}
// ----------------------------------------------------------------------
// Implementation methods
// ----------------------------------------------------------------------
@Provides
@Parameters
String[] parameters()
{
return args.clone();
}
// ----------------------------------------------------------------------
// Implementation types
// ----------------------------------------------------------------------
static final class ShutdownThread
extends Thread
{
private final MutableBeanLocator locator;
@Inject
ShutdownThread( final MutableBeanLocator locator )
{
this.locator = locator;
Runtime.getRuntime().addShutdownHook( this );
}
@Override
public void run()
{
locator.clear();
}
}
}