Examples of org.apache.felix.scr.impl.config.ComponentHolder

Package org.apache.felix.scr.impl.config

Examples of org.apache.felix.scr.impl.config.ComponentHolder

org.apache.felix.scr.impl.config.ComponentHolder
The ComponentHolder interface provides the API for supporting component instances configured through either singleton configurations (or no configuration at all) and factory configurations.
Instances of this interface are managed by the {@link ConfigurationSupport}class on behalf of the {@link org.apache.felix.scr.impl.BundleComponentActivator} and the{@link org.apache.felix.scr.impl.ComponentRegistry}.

     */
    final ComponentRegistryKey checkComponentName( final Bundle bundle, final String name )
    {
        // register the name if no registration for that name exists already
        final ComponentRegistryKey key = new ComponentRegistryKey( bundle, name );
        ComponentHolder existingRegistration = null;
        boolean present;
        synchronized ( m_componentHoldersByName )
        {
            present = m_componentHoldersByName.containsKey( key );
            if ( !present )
            {
                m_componentHoldersByName.put( key, null );
            }
            else
            {
                existingRegistration = m_componentHoldersByName.get( key );
            }
        }


        // there was a registration already, throw an exception and use the
        // existing registration to provide more information if possible
        if ( present )
        {
            String message = "The component name '" + name + "' has already been registered";


            if ( existingRegistration != null )
            {
                Bundle cBundle = existingRegistration.getActivator().getBundleContext().getBundle();
                ComponentMetadata cMeta = existingRegistration.getComponentMetadata();


                StringBuffer buf = new StringBuffer( message );
                buf.append( " by Bundle " ).append( cBundle.getBundleId() );
                if ( cBundle.getSymbolicName() != null )
                {

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     * <p>
     * After calling this method, the name can be reused by other components.
     */
    final void unregisterComponentHolder( final ComponentRegistryKey key )
    {
        ComponentHolder component;
        synchronized ( m_componentHoldersByName )
        {
            component = m_componentHoldersByName.remove( key );
        }


        if (component != null) {
            Activator.log(LogService.LOG_DEBUG, null, 
                    "Unregistering component with pid {0} for bundle {1}",
                    new Object[] {component.getComponentMetadata().getConfigurationPid(), key.getBundleId()}, null);
            synchronized (m_componentHoldersByPid)
            {
                String configurationPid = component.getComponentMetadata().getConfigurationPid();
                Set<ComponentHolder> componentsForPid = m_componentHoldersByPid.get(configurationPid);
                if (componentsForPid != null)
                {
                    componentsForPid.remove(component);
                    if (componentsForPid.size() == 0)

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     * Factory method to issue {@link ComponentHolder} instances to manage
     * components described by the given component <code>metadata</code>.
     */
    public ComponentHolder createComponentHolder( BundleComponentActivator activator, ComponentMetadata metadata )
    {
        ComponentHolder holder;


        if (metadata.isFactory())
        {
            // 112.2.4 SCR must register a Component Factory
            // service on behalf of the component

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                    // validate the component metadata
                    metadata.validate( this );


                    // Request creation of the component manager
                    ComponentHolder holder = m_componentRegistry.createComponentHolder( this, metadata );


                    // register the component after validation
                    m_componentRegistry.registerComponentHolder( key, holder );
                    m_managers.add( holder );

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            log( LogService.LOG_DEBUG, "BundleComponentActivator : Bundle [{0}] will destroy {1} instances", new Object[]
                    { m_bundle.getBundleId(), m_managers.size() }, null, null, null );


            while ( m_managers.size() != 0 )
            {
                ComponentHolder holder = m_managers.get( 0 );
                try
                {
                    m_managers.remove( holder );
                    holder.disposeComponents( reason );
                }
                catch ( Exception e )
                {
                    log( LogService.LOG_ERROR, "BundleComponentActivator : Exception invalidating", holder
                            .getComponentMetadata(), null, e );
                }
                finally
                {
                    m_componentRegistry.unregisterComponentHolder( m_bundle, holder.getComponentMetadata()
                            .getName() );
                }


            }

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        if ( name == null )
        {
            return m_managers.toArray( new ComponentHolder[m_managers.size()] );
        }


        ComponentHolder componentHolder = m_componentRegistry.getComponentHolder( m_bundle, name );
        if (componentHolder != null)
        {
            return new ComponentHolder[] { componentHolder };
        }

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Related Classes of org.apache.felix.scr.impl.config.ComponentHolder

org.apache.felix.scr.impl.BundleComponentActivator

org.apache.felix.scr.impl.ComponentRegistry

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