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134 lines
3.8 KiB
Java
134 lines
3.8 KiB
Java
/**
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* Copyright (c) 2010, Sebastian Sdorra
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are met:
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*
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* 1. Redistributions of source code must retain the above copyright notice,
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* this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright notice,
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* this list of conditions and the following disclaimer in the documentation
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* and/or other materials provided with the distribution.
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* 3. Neither the name of SCM-Manager; nor the names of its
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* contributors may be used to endorse or promote products derived from this
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* software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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* DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE FOR ANY
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* DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
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* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
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* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
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* ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
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* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*
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* http://bitbucket.org/sdorra/scm-manager
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*
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*/
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package sonia.scm;
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//~--- non-JDK imports --------------------------------------------------------
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import com.google.common.collect.Sets;
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import com.google.inject.AbstractModule;
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import com.google.inject.Injector;
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import com.google.inject.TypeLiteral;
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import com.google.inject.matcher.AbstractMatcher;
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import com.google.inject.matcher.Matcher;
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import com.google.inject.spi.TypeEncounter;
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import com.google.inject.spi.TypeListener;
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import org.slf4j.Logger;
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import org.slf4j.LoggerFactory;
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//~--- JDK imports ------------------------------------------------------------
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import java.lang.annotation.Annotation;
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import java.util.Set;
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/**
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*
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* @author Sebastian Sdorra
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*/
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public class EagerSingletonModule extends AbstractModule
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{
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/**
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* the logger for EagerSingletonModule
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*/
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private static final Logger logger =
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LoggerFactory.getLogger(EagerSingletonModule.class);
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//~--- methods --------------------------------------------------------------
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/**
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* Method description
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*
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*
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* @param injector
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*/
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void initialize(Injector injector)
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{
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for (Class<?> clazz : eagerSingletons)
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{
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logger.info("initialize eager singleton {}", clazz.getName());
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injector.getInstance(clazz);
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}
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}
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/**
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* Method description
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*
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*/
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@Override
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protected void configure()
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{
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bindListener(isAnnotatedWith(EagerSingleton.class), new TypeListener()
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{
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@Override
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public <I> void hear(TypeLiteral<I> type, TypeEncounter<I> encounter)
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{
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eagerSingletons.add(type.getRawType());
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}
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});
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bind(EagerSingletonModule.class).toInstance(this);
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}
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//~--- get methods ----------------------------------------------------------
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/**
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* Method description
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*
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*
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*
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* @param annotation
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*
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* @return
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*/
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private Matcher<TypeLiteral<?>> isAnnotatedWith(
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final Class<? extends Annotation> annotation)
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{
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return new AbstractMatcher<TypeLiteral<?>>()
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{
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@Override
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public boolean matches(TypeLiteral<?> type)
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{
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return type.getRawType().isAnnotationPresent(annotation);
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}
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};
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}
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//~--- fields ---------------------------------------------------------------
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/** Field description */
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private final Set<Class<?>> eagerSingletons = Sets.newHashSet();
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}
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