/**
* Copyright 2015-2016 Red Hat, Inc, and individual contributors.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.wildfly.swarm.container.runtime.cdi;
import java.io.IOException;
import java.io.InputStream;
import java.lang.reflect.Type;
import java.util.ArrayList;
import java.util.Collection;
import java.util.HashSet;
import java.util.List;
import java.util.Set;
import java.util.stream.Collectors;
import javax.enterprise.event.Observes;
import javax.enterprise.inject.spi.AfterBeanDiscovery;
import javax.enterprise.inject.spi.Bean;
import javax.enterprise.inject.spi.BeanManager;
import javax.enterprise.inject.spi.Extension;
import org.jboss.jandex.ClassInfo;
import org.jboss.jandex.DotName;
import org.jboss.jandex.Index;
import org.jboss.jandex.IndexReader;
import org.jboss.modules.Module;
import org.jboss.modules.ModuleIdentifier;
import org.jboss.modules.ModuleLoadException;
import org.jboss.weld.literal.AnyLiteral;
import org.wildfly.swarm.bootstrap.env.ApplicationEnvironment;
import org.wildfly.swarm.bootstrap.performance.Performance;
import org.wildfly.swarm.container.runtime.ConfigurableManager;
import org.wildfly.swarm.container.runtime.cdi.configurable.ConfigurableFractionBean;
import org.wildfly.swarm.spi.api.Fraction;
/**
* @author Ken Finnigan
*/
public class FractionProducingExtension implements Extension {
private final List<Fraction> explicitlyInstalledFractions = new ArrayList<>();
private final ConfigurableManager configurableManager;
public FractionProducingExtension(Collection<Fraction> explicitlyInstalled, ConfigurableManager configurableManager) {
this.explicitlyInstalledFractions.addAll(explicitlyInstalled);
this.configurableManager = configurableManager;
}
/**
* Once all beans have been discovered by Weld, for each custom fraction that we have,
* add the Bean instance to Weld as a replacement for the @DefaultFraction instance we vetoed.
*
* @param abd AfterBeanDiscovery
*/
@SuppressWarnings("unused")
void afterBeanDiscovery(@Observes AfterBeanDiscovery abd, BeanManager beanManager) throws Exception {
try (AutoCloseable handle = Performance.time("FractionProducingExtension.afterBeanDiscovery")) {
Set<Type> preExistingFractionClasses = new HashSet<>();
try (AutoCloseable pre = Performance.time("FractionProducingExtension.afterBeanDiscovery - pre-existing")) {
for (Fraction<?> fraction : explicitlyInstalledFractions) {
try {
abd.addBean(new ConfigurableFractionBean<>(fraction, this.configurableManager));
} catch (Exception e) {
throw new RuntimeException(e);
}
preExistingFractionClasses.add(fraction.getClass());
}
Set<Bean<?>> availableFractionBeans = beanManager.getBeans(Fraction.class, AnyLiteral.INSTANCE);
preExistingFractionClasses.addAll(
availableFractionBeans.stream()
.flatMap(e -> e.getTypes().stream())
.collect(Collectors.toSet())
);
}
Set<Class<? extends Fraction>> fractionClasses = uninstalledFractionClasses(preExistingFractionClasses);
try (AutoCloseable defaultHandle = Performance.time("FractionProducingExtension.afterBeanDiscovery - default")) {
fractionClasses.forEach((cls) -> {
try {
abd.addBean(new ConfigurableFractionBean<>(cls, this.configurableManager));
} catch (Exception e) {
throw new RuntimeException(e);
}
});
}
}
}
@SuppressWarnings("unchecked")
private Set<Class<? extends Fraction>> uninstalledFractionClasses(Set<Type> installedClasses) throws ModuleLoadException, IOException, ClassNotFoundException {
Set<String> installedClassNames = installedClasses.stream().map(Type::getTypeName).collect(Collectors.toSet());
List<String> moduleNames = ApplicationEnvironment.get().bootstrapModules();
ClassLoader cl = Module.getBootModuleLoader().loadModule(ModuleIdentifier.create("swarm.container")).getClassLoader();
Set<Class<? extends Fraction>> fractionClasses = new HashSet<>();
for (String moduleName : moduleNames) {
Module module = Module.getBootModuleLoader().loadModule(ModuleIdentifier.create(moduleName));
InputStream indexStream = module.getClassLoader().getResourceAsStream("META-INF/jandex.idx");
if (indexStream != null) {
IndexReader reader = new IndexReader(indexStream);
Index index = reader.read();
Set<ClassInfo> impls = index.getAllKnownImplementors(DotName.createSimple(Fraction.class.getName()));
for (ClassInfo impl : impls) {
if (!installedClassNames.contains(impl.name().toString())) {
Class<? extends Fraction> fractionClass = (Class<? extends Fraction>) cl.loadClass(impl.name().toString());
fractionClasses.add(fractionClass);
}
}
}
}
return fractionClasses;
}
}