Hi everyone!
I have just tried to use the "Model Entity Indexing Framework":  https://help.liferay.com/hc/en-us/articles/360032260612-Model-Entity-Indexing-Framework (for Liferay 7.3.2 CE GA 3)

I have a service builder module with just one entity ("Project") for now.  I have implemented a  ProjectModelIndexerWriterContributor class:

[code]@Component(
        immediate = true,
        property = "indexer.class.name=com.aimprosoft.intranet.sb.model.Project",
        service = ModelIndexerWriterContributor.class
)
public class ProjectModelIndexerWriterContributor implements ModelIndexerWriterContributor<project> {

    @Override
    public void customize(BatchIndexingActionable batchIndexingActionable,
                          ModelIndexerWriterDocumentHelper modelIndexerWriterDocumentHelper) {
        batchIndexingActionable.setPerformActionMethod(
                (Project project) -&gt; batchIndexingActionable.addDocuments(
                        modelIndexerWriterDocumentHelper.getDocument(project)));
    }

    @Override
    public BatchIndexingActionable getBatchIndexingActionable() {
        return _dynamicQueryBatchIndexingActionableFactory.
                getBatchIndexingActionable(
                        _projectLocalService.getIndexableActionableDynamicQuery());
    }

    @Override
    public long getCompanyId(Project project) {
        return project.getProjectId();
    }

    @Override
    public IndexerWriterMode getIndexerWriterMode(Project project) {
        if (project.isApproved() || project.isDraft() ||
                project.isInTrash() || project.isPending()) {

            return IndexerWriterMode.UPDATE;
        }

        if (!project.isApproved() &amp;&amp; !project.isInTrash()) {
            return IndexerWriterMode.SKIP;
        }

        return IndexerWriterMode.DELETE;
    }

    @Reference
    protected ProjectLocalService _projectLocalService;
    @Reference
    protected DynamicQueryBatchIndexingActionableFactory _dynamicQueryBatchIndexingActionableFactory;


}</project>

When I reindex my model in Control Panel - the exception is thrown, and indexing process hangs:

Exception message:

Exception in thread "liferay/background_task-2" java.lang.NoClassDefFoundError: com/liferay/portal/kernel/service/persistence/BasePersistence
    at java.lang.Class.getDeclaredMethods0(Native Method)
    at java.lang.Class.privateGetDeclaredMethods(Class.java:2701)
    at java.lang.Class.privateGetMethodRecursive(Class.java:3048)
    at java.lang.Class.getMethod0(Class.java:3018)
    at java.lang.Class.getMethod(Class.java:1784)
    at com.liferay.portal.kernel.dao.orm.DefaultActionableDynamicQuery.setBaseLocalService(DefaultActionableDynamicQuery.java:140)
    at com.aimprosoft.intranet.sb.service.base.ProjectLocalServiceBaseImpl.getIndexableActionableDynamicQuery(ProjectLocalServiceBaseImpl.java:275)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.lang.reflect.Method.invoke(Method.java:498)
    at com.liferay.portal.spring.aop.AopMethodInvocationImpl.proceed(AopMethodInvocationImpl.java:50)
    at com.liferay.portal.spring.transaction.TransactionInterceptor.invoke(TransactionInterceptor.java:69)
    at com.liferay.portal.spring.aop.AopMethodInvocationImpl.proceed(AopMethodInvocationImpl.java:57)
    at com.liferay.portal.spring.aop.AopInvocationHandler.invoke(AopInvocationHandler.java:49)
    at com.sun.proxy.$Proxy747.getIndexableActionableDynamicQuery(Unknown Source)
    at com.aimprosoft.intranet.sb.internal.search.spi.model.index.contributor.ProjectModelIndexerWriterContributor.getBatchIndexingActionable(ProjectModelIndexerWriterContributor.java:32)
    at com.liferay.portal.search.internal.indexer.IndexerWriterImpl.getBatchIndexingActionable(IndexerWriterImpl.java:106)
    at com.liferay.portal.search.internal.indexer.IndexerWriterImpl.reindex(IndexerWriterImpl.java:188)
    at com.liferay.portal.search.internal.indexer.DefaultIndexer.reindex(DefaultIndexer.java:255)
    at com.liferay.portal.search.internal.background.task.ReindexSingleIndexerBackgroundTaskExecutor.reindex(ReindexSingleIndexerBackgroundTaskExecutor.java:103)
    at com.liferay.portal.search.internal.background.task.ReindexBackgroundTaskExecutor.execute(ReindexBackgroundTaskExecutor.java:54)
    at com.liferay.portal.background.task.internal.SerialBackgroundTaskExecutor.execute(SerialBackgroundTaskExecutor.java:62)
    at com.liferay.portal.kernel.backgroundtask.DelegatingBackgroundTaskExecutor.execute(DelegatingBackgroundTaskExecutor.java:41)
    at com.liferay.portal.background.task.internal.ThreadLocalAwareBackgroundTaskExecutor.execute(ThreadLocalAwareBackgroundTaskExecutor.java:72)
    at com.liferay.portal.background.task.internal.messaging.BackgroundTaskMessageListener.doReceive(BackgroundTaskMessageListener.java:136)
    at com.liferay.portal.kernel.messaging.BaseMessageListener.receive(BaseMessageListener.java:26)
    at com.liferay.portal.kernel.messaging.InvokerMessageListener.receive(InvokerMessageListener.java:74)
    at com.liferay.portal.messaging.internal.ParallelDestination$1.run(ParallelDestination.java:56)
    at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
    at java.lang.Thread.run(Thread.java:748)
Caused by: java.lang.ClassNotFoundException: com.liferay.portal.kernel.service.persistence.BasePersistence cannot be found by com.aimprosoft.intranet.sb.service_1.0.0
    at org.eclipse.osgi.internal.loader.BundleLoader.findClassInternal(BundleLoader.java:508)
    at org.eclipse.osgi.internal.loader.BundleLoader.findClass(BundleLoader.java:419)
    at org.eclipse.osgi.internal.loader.BundleLoader.findClass(BundleLoader.java:411)
    at org.eclipse.osgi.internal.loader.ModuleClassLoader.loadClass(ModuleClassLoader.java:151)
    at java.lang.ClassLoader.loadClass(ClassLoader.java:357)
    ... 32 more

Any ideas what may be wrong?
Service Builder (-api and -service) modules attached.

Regards and thanks,Vitaliy