ds with multiple cdi implementations

BeanManagerProvider.java

/*
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements. See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership. The ASF licenses this file
 * to you 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.apache.deltaspike.core.api.provider;

import org.apache.deltaspike.core.util.ClassUtils;

import javax.enterprise.inject.spi.BeanManager;
import javax.enterprise.inject.spi.Extension;
import java.util.Iterator;
import java.util.Map;
import java.util.ServiceLoader;
import java.util.concurrent.ConcurrentHashMap;

public class BeanManagerProvider implements Extension
{
    private static BeanManagerProvider bmpSingleton = null;

    private Map<ClassLoader, BeanManager> beanManagerCache = new ConcurrentHashMap<ClassLoader, BeanManager>();

    public static BeanManagerProvider getInstance()
    {
        if (bmpSingleton == null)
        {
            bmpSingleton = new BeanManagerProvider();
        }
        return bmpSingleton;
    }

    public BeanManager getBeanManager()
    {
        BeanManager beanManager = beanManagerCache.get(ClassUtils.getClassLoader(null));
        if (beanManager != null)
        {
            return beanManager;
        }

        synchronized (BeanManagerProvider.class)
        {
            beanManager = beanManagerCache.get(ClassUtils.getClassLoader(null));
            if (beanManager != null)
            {
                return beanManager;
            }

            ServiceLoader<BeanManagerResolver> beanManagerResolverLoader =
                    ServiceLoader.load(BeanManagerResolver.class);
            Iterator<BeanManagerResolver> beanManagerResolverIterator = beanManagerResolverLoader.iterator();
            if (beanManagerResolverIterator.hasNext())
            {
                beanManager = beanManagerResolverIterator.next().getBeanManager();
                beanManagerCache.put(ClassUtils.getClassLoader(null), beanManager);
            }
        }
        return beanManagerCache.get(ClassUtils.getClassLoader(null));
    }
}

BeanManagerResolver.java

/*
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements. See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership. The ASF licenses this file
 * to you 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.apache.deltaspike.core.spi.resolver;

import javax.enterprise.inject.spi.BeanManager;

public interface BeanManagerResolver
{
    BeanManager getBeanManager();
}

DefaultBeanManagerResolver.java

/*
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements. See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership. The ASF licenses this file
 * to you 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.apache.deltaspike.cdise.owb;

import org.apache.deltaspike.cdise.api.CdiContainer;
import org.apache.deltaspike.cdise.api.CdiContainerLoader;
import org.apache.deltaspike.core.spi.resolver.BeanManagerResolver;

import javax.enterprise.inject.spi.BeanManager;

public class DefaultBeanManagerResolver implements BeanManagerResolver
{
    @Override
    public BeanManager getBeanManager()
    {
        CdiContainer cdiContainer = CdiContainerLoader.getCdiContainer();
        cdiContainer.boot(); //a second call will get ignored
        return cdiContainer.getBeanManager();
    }
}

//don't forget to configure it

DefaultServletContextEventResolver.java

/*
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements. See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership. The ASF licenses this file
 * to you 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.apache.deltaspike.cdise.owb;

import org.apache.deltaspike.cdise.spi.ServletContextEventResolver;
import org.apache.deltaspike.core.util.ClassUtils;

import javax.servlet.ServletContextEvent;
import javax.servlet.ServletContextListener;
import java.util.Map;
import java.util.concurrent.ConcurrentHashMap;

public class DefaultServletContextEventResolver implements ServletContextListener, ServletContextEventResolver
{
    private static final Map<ClassLoader, ServletContextEvent> SERVLET_CONTEXT_EVENT_CACHE =
            new ConcurrentHashMap<ClassLoader, ServletContextEvent>();

    @Override
    public ServletContextEvent get()
    {
        return SERVLET_CONTEXT_EVENT_CACHE.get(ClassUtils.getClassLoader(null));
    }

    @Override
    public void contextInitialized(ServletContextEvent sce)
    {
        SERVLET_CONTEXT_EVENT_CACHE.put(ClassUtils.getClassLoader(null), sce);
    }

    @Override
    public void contextDestroyed(ServletContextEvent sce)
    {
        SERVLET_CONTEXT_EVENT_CACHE.remove(ClassUtils.getClassLoader(null));
    }
}

//don't forget to configure it

OpenWebBeansContainerControl.java

/*
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements. See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership. The ASF licenses this file
 * to you 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.apache.deltaspike.cdise.owb;

import org.apache.deltaspike.cdise.api.CdiContainer;
import org.apache.deltaspike.cdise.api.ContextControl;
import org.apache.deltaspike.cdise.spi.ServletContextEventResolver;
import org.apache.webbeans.config.WebBeansContext;
import org.apache.webbeans.spi.ContainerLifecycle;

import javax.enterprise.context.spi.CreationalContext;
import javax.enterprise.inject.spi.Bean;
import javax.enterprise.inject.spi.BeanManager;
import javax.servlet.ServletContextEvent;
import java.util.Iterator;
import java.util.ServiceLoader;
import java.util.Set;
import java.util.logging.Logger;

/**
 * OpenWebBeans specific implementation of {@link org.apache.deltaspike.cdise.api.CdiContainer}.
 */
public class OpenWebBeansContainerControl implements CdiContainer
{
    private static final Logger LOG = Logger.getLogger(OpenWebBeansContainerControl.class.getName());

    private ContainerLifecycle lifecycle;

    private ContextControl ctxCtrl = null;
    private Bean<ContextControl> ctxCtrlBean = null;
    private CreationalContext<ContextControl> ctxCtrlCreationalContext = null;

    @Override
    public BeanManager getBeanManager()
    {
        if (lifecycle == null)
        {
            lifecycle = WebBeansContext.currentInstance().getService(ContainerLifecycle.class);
        }
        return lifecycle.getBeanManager();
    }

    @Override
    public synchronized void boot()
    {
        if (lifecycle != null)
        {
            return;
        }

        lifecycle = WebBeansContext.currentInstance().getService(ContainerLifecycle.class);

        lifecycle.startApplication(getServletContextEvent());
    }

    @Override
    public synchronized void shutdown()
    {
        if (ctxCtrl != null)
        {
            ctxCtrlBean.destroy(ctxCtrl, ctxCtrlCreationalContext);
        }

        if (lifecycle != null) 
        {
            lifecycle.stopApplication(getServletContextEvent());
        }
        lifecycle = null;
    }

    @Override
    public synchronized ContextControl getContextControl()
    {
        if (ctxCtrl == null)
        {
            Set<Bean<?>> beans = getBeanManager().getBeans(ContextControl.class);

            BeanManager beanManager = getBeanManager();

            if (beanManager == null)
            {
                LOG.warning("If the CDI-container was started by the environment, you can't use this helper." +
                        "Instead you can resolve ContextControl manually " +
                        "(e.g. via BeanProvider.getContextualReference(ContextControl.class) ). " +
                        "If the container wasn't started already, you have to use CdiContainer#boot before.");

                return null;
            }

            ctxCtrlBean = (Bean<ContextControl>) beanManager.resolve(beans);
            ctxCtrlCreationalContext = getBeanManager().createCreationalContext(ctxCtrlBean);
            ctxCtrl = (ContextControl)
                    getBeanManager().getReference(ctxCtrlBean, ContextControl.class, ctxCtrlCreationalContext);
        }
        return ctxCtrl;
    }

    private ServletContextEvent getServletContextEvent()
    {
        ServiceLoader<ServletContextEventResolver> servletContextResolverLoader =
                ServiceLoader.load(ServletContextEventResolver.class);
        Iterator<ServletContextEventResolver> servletContextResolverIterator = servletContextResolverLoader.iterator();

        ServletContextEvent servletContextEvent = null;
        if (servletContextResolverIterator.hasNext())
        {
            servletContextEvent = servletContextResolverIterator.next().get();
        }
        return servletContextEvent;
    }
}

ServletContextEventResolver.java

/*
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements. See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership. The ASF licenses this file
 * to you 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.apache.deltaspike.cdise.spi;

import javax.servlet.ServletContextEvent;

public interface ServletContextEventResolver
{
    ServletContextEvent get();
}