Bump upstreams for Silicon
[netconf.git] / restconf / restconf-nb-rfc8040 / src / main / java / org / opendaylight / restconf / nb / rfc8040 / rests / services / impl / RestconfDataServiceImpl.java
index b245738e18f12d86cc9b6892ba9bc3d6db5cfc07..a2becd5c7fc0ae97791809337adbc9abaa418268 100644 (file)
@@ -11,25 +11,30 @@ import static java.util.Objects.requireNonNull;
 import static org.opendaylight.restconf.nb.rfc8040.rests.utils.RestconfDataServiceConstant.PostPutQueryParameters.INSERT;
 import static org.opendaylight.restconf.nb.rfc8040.rests.utils.RestconfDataServiceConstant.PostPutQueryParameters.POINT;
 import static org.opendaylight.restconf.nb.rfc8040.rests.utils.RestconfStreamsConstants.NOTIFICATION_STREAM;
+import static org.opendaylight.restconf.nb.rfc8040.rests.utils.RestconfStreamsConstants.STREAMS_PATH;
 import static org.opendaylight.restconf.nb.rfc8040.rests.utils.RestconfStreamsConstants.STREAM_ACCESS_PATH_PART;
 import static org.opendaylight.restconf.nb.rfc8040.rests.utils.RestconfStreamsConstants.STREAM_LOCATION_PATH_PART;
 import static org.opendaylight.restconf.nb.rfc8040.rests.utils.RestconfStreamsConstants.STREAM_PATH;
+import static org.opendaylight.restconf.nb.rfc8040.rests.utils.RestconfStreamsConstants.STREAM_PATH_PART;
 
+import com.google.common.collect.ImmutableList;
+import java.net.URI;
 import java.time.Clock;
 import java.time.LocalDateTime;
 import java.time.format.DateTimeFormatter;
 import java.util.List;
 import java.util.Map.Entry;
 import java.util.Optional;
+import java.util.concurrent.ExecutionException;
 import javax.ws.rs.Path;
 import javax.ws.rs.WebApplicationException;
 import javax.ws.rs.core.Response;
 import javax.ws.rs.core.UriInfo;
-import org.eclipse.jdt.annotation.NonNull;
 import org.eclipse.jdt.annotation.Nullable;
+import org.opendaylight.mdsal.common.api.LogicalDatastoreType;
 import org.opendaylight.mdsal.dom.api.DOMActionResult;
-import org.opendaylight.mdsal.dom.api.DOMDataBroker;
 import org.opendaylight.mdsal.dom.api.DOMMountPoint;
+import org.opendaylight.mdsal.dom.api.DOMSchemaService;
 import org.opendaylight.restconf.common.context.InstanceIdentifierContext;
 import org.opendaylight.restconf.common.context.NormalizedNodeContext;
 import org.opendaylight.restconf.common.context.WriterParameters;
@@ -39,14 +44,15 @@ import org.opendaylight.restconf.common.errors.RestconfError.ErrorTag;
 import org.opendaylight.restconf.common.errors.RestconfError.ErrorType;
 import org.opendaylight.restconf.common.patch.PatchContext;
 import org.opendaylight.restconf.common.patch.PatchStatusContext;
+import org.opendaylight.restconf.nb.rfc8040.Rfc8040;
 import org.opendaylight.restconf.nb.rfc8040.handlers.ActionServiceHandler;
 import org.opendaylight.restconf.nb.rfc8040.handlers.DOMMountPointServiceHandler;
 import org.opendaylight.restconf.nb.rfc8040.handlers.SchemaContextHandler;
 import org.opendaylight.restconf.nb.rfc8040.handlers.TransactionChainHandler;
-import org.opendaylight.restconf.nb.rfc8040.references.SchemaContextRef;
 import org.opendaylight.restconf.nb.rfc8040.rests.services.api.RestconfDataService;
 import org.opendaylight.restconf.nb.rfc8040.rests.services.api.RestconfStreamsSubscriptionService;
-import org.opendaylight.restconf.nb.rfc8040.rests.transactions.TransactionVarsWrapper;
+import org.opendaylight.restconf.nb.rfc8040.rests.transactions.MdsalRestconfStrategy;
+import org.opendaylight.restconf.nb.rfc8040.rests.transactions.RestconfStrategy;
 import org.opendaylight.restconf.nb.rfc8040.rests.utils.DeleteDataTransactionUtil;
 import org.opendaylight.restconf.nb.rfc8040.rests.utils.PatchDataTransactionUtil;
 import org.opendaylight.restconf.nb.rfc8040.rests.utils.PlainPatchDataTransactionUtil;
@@ -54,9 +60,14 @@ import org.opendaylight.restconf.nb.rfc8040.rests.utils.PostDataTransactionUtil;
 import org.opendaylight.restconf.nb.rfc8040.rests.utils.PutDataTransactionUtil;
 import org.opendaylight.restconf.nb.rfc8040.rests.utils.ReadDataTransactionUtil;
 import org.opendaylight.restconf.nb.rfc8040.rests.utils.RestconfDataServiceConstant;
+import org.opendaylight.restconf.nb.rfc8040.rests.utils.RestconfDataServiceConstant.PostPutQueryParameters.Insert;
 import org.opendaylight.restconf.nb.rfc8040.rests.utils.RestconfInvokeOperationsUtil;
-import org.opendaylight.restconf.nb.rfc8040.utils.RestconfConstants;
+import org.opendaylight.restconf.nb.rfc8040.streams.Configuration;
+import org.opendaylight.restconf.nb.rfc8040.streams.listeners.NotificationListenerAdapter;
+import org.opendaylight.restconf.nb.rfc8040.utils.mapping.RestconfMappingNodeUtil;
+import org.opendaylight.restconf.nb.rfc8040.utils.parser.IdentifierCodec;
 import org.opendaylight.restconf.nb.rfc8040.utils.parser.ParserIdentifier;
+import org.opendaylight.yang.gen.v1.urn.sal.restconf.event.subscription.rev140708.NotificationOutputTypeGrouping.NotificationOutputType;
 import org.opendaylight.yangtools.concepts.Immutable;
 import org.opendaylight.yangtools.yang.common.QName;
 import org.opendaylight.yangtools.yang.common.Revision;
@@ -64,8 +75,10 @@ import org.opendaylight.yangtools.yang.data.api.YangInstanceIdentifier;
 import org.opendaylight.yangtools.yang.data.api.schema.ContainerNode;
 import org.opendaylight.yangtools.yang.data.api.schema.NormalizedNode;
 import org.opendaylight.yangtools.yang.model.api.ActionDefinition;
+import org.opendaylight.yangtools.yang.model.api.EffectiveModelContext;
+import org.opendaylight.yangtools.yang.model.api.NotificationDefinition;
 import org.opendaylight.yangtools.yang.model.api.SchemaNode;
-import org.opendaylight.yangtools.yang.model.api.SchemaPath;
+import org.opendaylight.yangtools.yang.model.api.stmt.SchemaNodeIdentifier.Absolute;
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
 
@@ -74,11 +87,12 @@ import org.slf4j.LoggerFactory;
  */
 @Path("/")
 public class RestconfDataServiceImpl implements RestconfDataService {
+    // FIXME: we should be able to interpret 'point' and refactor this class into a behavior
     private static final class QueryParams implements Immutable {
         final @Nullable String point;
-        final @Nullable String insert;
+        final @Nullable Insert insert;
 
-        QueryParams(final @Nullable String insert, final @Nullable String point) {
+        QueryParams(final @Nullable Insert insert, final @Nullable String point) {
             this.insert = insert;
             this.point = point;
         }
@@ -88,6 +102,7 @@ public class RestconfDataServiceImpl implements RestconfDataService {
     private static final DateTimeFormatter FORMATTER = DateTimeFormatter.ofPattern("yyyy-MMM-dd HH:mm:ss");
 
     private final RestconfStreamsSubscriptionService delegRestconfSubscrService;
+    private final SubscribeToStreamUtil streamUtils;
 
     // FIXME: evaluate thread-safety of updates (synchronized) vs. access (mostly unsynchronized) here
     private SchemaContextHandler schemaContextHandler;
@@ -99,12 +114,15 @@ public class RestconfDataServiceImpl implements RestconfDataService {
             final TransactionChainHandler transactionChainHandler,
             final DOMMountPointServiceHandler mountPointServiceHandler,
             final RestconfStreamsSubscriptionService delegRestconfSubscrService,
-            final ActionServiceHandler actionServiceHandler) {
+            final ActionServiceHandler actionServiceHandler,
+            final Configuration configuration) {
         this.actionServiceHandler = requireNonNull(actionServiceHandler);
         this.schemaContextHandler = requireNonNull(schemaContextHandler);
         this.transactionChainHandler = requireNonNull(transactionChainHandler);
         this.mountPointServiceHandler = requireNonNull(mountPointServiceHandler);
         this.delegRestconfSubscrService = requireNonNull(delegRestconfSubscrService);
+        streamUtils = configuration.isUseSSE() ? SubscribeToStreamUtil.serverSentEvents()
+                : SubscribeToStreamUtil.webSockets();
     }
 
     @Override
@@ -129,21 +147,20 @@ public class RestconfDataServiceImpl implements RestconfDataService {
 
     @Override
     public Response readData(final String identifier, final UriInfo uriInfo) {
-        final SchemaContextRef schemaContextRef = new SchemaContextRef(this.schemaContextHandler.get());
+        final EffectiveModelContext schemaContextRef = this.schemaContextHandler.get();
         final InstanceIdentifierContext<?> instanceIdentifier = ParserIdentifier.toInstanceIdentifier(
-                identifier, schemaContextRef.get(), Optional.of(this.mountPointServiceHandler.get()));
+                identifier, schemaContextRef, Optional.of(this.mountPointServiceHandler.get()));
         final WriterParameters parameters = ReadDataTransactionUtil.parseUriParameters(instanceIdentifier, uriInfo);
 
         final DOMMountPoint mountPoint = instanceIdentifier.getMountPoint();
-        final TransactionVarsWrapper transactionNode = new TransactionVarsWrapper(
-                instanceIdentifier, mountPoint, getTransactionChainHandler(mountPoint));
-        final NormalizedNode<?, ?> node = ReadDataTransactionUtil.readData(identifier, parameters.getContent(),
-                transactionNode, parameters.getWithDefault(), schemaContextRef, uriInfo);
+        final RestconfStrategy strategy = getRestconfStrategy(mountPoint);
+        final NormalizedNode<?, ?> node = readData(identifier, parameters.getContent(),
+                instanceIdentifier.getInstanceIdentifier(), strategy, parameters.getWithDefault(), schemaContextRef,
+                uriInfo);
         if (identifier != null && identifier.contains(STREAM_PATH) && identifier.contains(STREAM_ACCESS_PATH_PART)
                 && identifier.contains(STREAM_LOCATION_PATH_PART)) {
             final String value = (String) node.getValue();
-            final String streamName = value.substring(
-                    value.indexOf(NOTIFICATION_STREAM + RestconfConstants.SLASH));
+            final String streamName = value.substring(value.indexOf(NOTIFICATION_STREAM + '/'));
             this.delegRestconfSubscrService.subscribeToStream(streamName, uriInfo);
         }
         if (node == null) {
@@ -159,7 +176,7 @@ public class RestconfDataServiceImpl implements RestconfDataService {
             return Response.status(200)
                     .entity(new NormalizedNodeContext(instanceIdentifier, node, parameters))
                     .header("ETag", '"' + type.getModule().getRevision().map(Revision::toString).orElse(null)
-                        + type.getLocalName() + '"')
+                        + "-" + type.getLocalName() + '"')
                     .header("Last-Modified", FORMATTER.format(LocalDateTime.now(Clock.systemUTC())))
                     .build();
         }
@@ -167,60 +184,133 @@ public class RestconfDataServiceImpl implements RestconfDataService {
         return Response.status(200).entity(new NormalizedNodeContext(instanceIdentifier, node, parameters)).build();
     }
 
+    /**
+     * Read specific type of data from data store via transaction and if identifier read data from
+     * streams then put streams from actual schema context to datastore.
+     *
+     * @param identifier    identifier of data to read
+     * @param content       type of data to read (config, state, all)
+     * @param strategy      {@link RestconfStrategy} - object that perform the actual DS operations
+     * @param withDefa      value of with-defaults parameter
+     * @param schemaContext schema context
+     * @param uriInfo       uri info
+     * @return {@link NormalizedNode}
+     */
+    private NormalizedNode<?, ?> readData(final String identifier, final String content,
+            final YangInstanceIdentifier path, final RestconfStrategy strategy, final String withDefa,
+            final EffectiveModelContext schemaContext, final UriInfo uriInfo) {
+        if (identifier != null && identifier.contains(STREAMS_PATH) && !identifier.contains(STREAM_PATH_PART)) {
+            createAllYangNotificationStreams(strategy, schemaContext, uriInfo);
+        }
+        return ReadDataTransactionUtil.readData(content, path, strategy, withDefa, schemaContext);
+    }
+
+    private void createAllYangNotificationStreams(final RestconfStrategy strategy,
+            final EffectiveModelContext schemaContext, final UriInfo uriInfo) {
+        strategy.prepareReadWriteExecution();
+        final boolean exist = checkExist(schemaContext, strategy);
+
+        for (final NotificationDefinition notificationDefinition : schemaContext.getNotifications()) {
+            final NotificationListenerAdapter notifiStreamXML =
+                CreateStreamUtil.createYangNotifiStream(notificationDefinition, schemaContext,
+                    NotificationOutputType.XML);
+            final NotificationListenerAdapter notifiStreamJSON =
+                CreateStreamUtil.createYangNotifiStream(notificationDefinition, schemaContext,
+                    NotificationOutputType.JSON);
+            writeNotificationStreamToDatastore(schemaContext, uriInfo, strategy, exist, notifiStreamXML);
+            writeNotificationStreamToDatastore(schemaContext, uriInfo, strategy, exist, notifiStreamJSON);
+        }
+        try {
+            strategy.commit().get();
+        } catch (final InterruptedException | ExecutionException e) {
+            throw new RestconfDocumentedException("Problem while putting data to DS.", e);
+        }
+    }
+
+    private void writeNotificationStreamToDatastore(final EffectiveModelContext schemaContext,
+            final UriInfo uriInfo, final RestconfStrategy strategy, final boolean exist,
+            final NotificationListenerAdapter listener) {
+        final URI uri = streamUtils.prepareUriByStreamName(uriInfo, listener.getStreamName());
+        final NormalizedNode<?, ?> mapToStreams =
+            RestconfMappingNodeUtil.mapYangNotificationStreamByIetfRestconfMonitoring(
+                listener.getSchemaPath().lastNodeIdentifier(), schemaContext.getNotifications(), null,
+                listener.getOutputType(), uri, SubscribeToStreamUtil.getMonitoringModule(schemaContext), exist);
+        writeDataToDS(schemaContext,
+            listener.getSchemaPath().lastNodeIdentifier().getLocalName(), strategy, exist, mapToStreams);
+    }
+
+    private static boolean checkExist(final EffectiveModelContext schemaContext, final RestconfStrategy strategy) {
+        try {
+            return strategy.exists(LogicalDatastoreType.OPERATIONAL,
+                IdentifierCodec.deserialize(Rfc8040.MonitoringModule.PATH_TO_STREAMS, schemaContext)).get();
+        } catch (final InterruptedException | ExecutionException exception) {
+            throw new RestconfDocumentedException("Problem while checking data if exists", exception);
+        }
+    }
+
+    private static void writeDataToDS(final EffectiveModelContext schemaContext, final String name,
+                                      final RestconfStrategy strategy, final boolean exist,
+                                      final NormalizedNode<?, ?> mapToStreams) {
+        final String pathId;
+        if (exist) {
+            pathId = Rfc8040.MonitoringModule.PATH_TO_STREAM_WITHOUT_KEY + name;
+        } else {
+            pathId = Rfc8040.MonitoringModule.PATH_TO_STREAMS;
+        }
+        strategy.merge(LogicalDatastoreType.OPERATIONAL, IdentifierCodec.deserialize(pathId, schemaContext),
+            mapToStreams);
+    }
+
     @Override
     public Response putData(final String identifier, final NormalizedNodeContext payload, final UriInfo uriInfo) {
         requireNonNull(payload);
 
         final QueryParams checkedParms = checkQueryParameters(uriInfo);
 
-        final InstanceIdentifierContext<? extends SchemaNode> iid = payload
-                .getInstanceIdentifierContext();
+        final InstanceIdentifierContext<? extends SchemaNode> iid = payload.getInstanceIdentifierContext();
 
         PutDataTransactionUtil.validInputData(iid.getSchemaNode(), payload);
         PutDataTransactionUtil.validTopLevelNodeName(iid.getInstanceIdentifier(), payload);
         PutDataTransactionUtil.validateListKeysEqualityInPayloadAndUri(payload);
 
         final DOMMountPoint mountPoint = payload.getInstanceIdentifierContext().getMountPoint();
-        final TransactionChainHandler localTransactionChainHandler;
-        final SchemaContextRef ref;
-        if (mountPoint == null) {
-            localTransactionChainHandler = this.transactionChainHandler;
-            ref = new SchemaContextRef(this.schemaContextHandler.get());
-        } else {
-            localTransactionChainHandler = transactionChainOfMountPoint(mountPoint);
-            ref = new SchemaContextRef(mountPoint.getEffectiveModelContext());
-        }
+        final EffectiveModelContext ref = mountPoint == null
+                ? this.schemaContextHandler.get() : modelContext(mountPoint);
 
-        final TransactionVarsWrapper transactionNode = new TransactionVarsWrapper(
-                payload.getInstanceIdentifierContext(), mountPoint, localTransactionChainHandler);
-        return PutDataTransactionUtil.putData(payload, ref, transactionNode, checkedParms.insert, checkedParms.point);
+        final RestconfStrategy strategy = getRestconfStrategy(mountPoint);
+        return PutDataTransactionUtil.putData(payload, ref, strategy, checkedParms.insert, checkedParms.point);
     }
 
     private static QueryParams checkQueryParameters(final UriInfo uriInfo) {
         boolean insertUsed = false;
         boolean pointUsed = false;
-        String insert = null;
+        Insert insert = null;
         String point = null;
 
         for (final Entry<String, List<String>> entry : uriInfo.getQueryParameters().entrySet()) {
             switch (entry.getKey()) {
                 case INSERT:
-                    if (!insertUsed) {
-                        insertUsed = true;
-                        insert = entry.getValue().get(0);
-                    } else {
+                    if (insertUsed) {
                         throw new RestconfDocumentedException("Insert parameter can be used only once.",
-                                RestconfError.ErrorType.PROTOCOL, RestconfError.ErrorTag.BAD_ELEMENT);
+                            RestconfError.ErrorType.PROTOCOL, RestconfError.ErrorTag.BAD_ELEMENT);
+                    }
+
+                    insertUsed = true;
+                    final String str = entry.getValue().get(0);
+                    insert = Insert.valueOf(str);
+                    if (insert == null) {
+                        throw new RestconfDocumentedException("Unrecognized insert parameter value '" + str + "'",
+                            RestconfError.ErrorType.PROTOCOL, RestconfError.ErrorTag.BAD_ELEMENT);
                     }
                     break;
                 case POINT:
-                    if (!pointUsed) {
-                        pointUsed = true;
-                        point = entry.getValue().get(0);
-                    } else {
+                    if (pointUsed) {
                         throw new RestconfDocumentedException("Point parameter can be used only once.",
-                                RestconfError.ErrorType.PROTOCOL, RestconfError.ErrorTag.BAD_ELEMENT);
+                            RestconfError.ErrorType.PROTOCOL, RestconfError.ErrorTag.BAD_ELEMENT);
                     }
+
+                    pointUsed = true;
+                    point = entry.getValue().get(0);
                     break;
                 default:
                     throw new RestconfDocumentedException("Bad parameter for post: " + entry.getKey(),
@@ -232,15 +322,18 @@ public class RestconfDataServiceImpl implements RestconfDataService {
         return new QueryParams(insert, point);
     }
 
-    private static void checkQueryParams(final boolean insertUsed, final boolean pointUsed, final String insert) {
-        if (pointUsed && !insertUsed) {
-            throw new RestconfDocumentedException("Point parameter can't be used without Insert parameter.",
+    private static void checkQueryParams(final boolean insertUsed, final boolean pointUsed, final Insert insert) {
+        if (pointUsed) {
+            if (!insertUsed) {
+                throw new RestconfDocumentedException("Point parameter can't be used without Insert parameter.",
                     RestconfError.ErrorType.PROTOCOL, RestconfError.ErrorTag.BAD_ELEMENT);
-        }
-        if (pointUsed && (insert.equals("first") || insert.equals("last"))) {
-            throw new RestconfDocumentedException(
+            }
+
+            if (insert != Insert.BEFORE && insert != Insert.AFTER) {
+                throw new RestconfDocumentedException(
                     "Point parameter can be used only with 'after' or 'before' values of Insert parameter.",
                     RestconfError.ErrorType.PROTOCOL, RestconfError.ErrorTag.BAD_ELEMENT);
+            }
         }
     }
 
@@ -257,31 +350,20 @@ public class RestconfDataServiceImpl implements RestconfDataService {
         }
 
         final QueryParams checkedParms = checkQueryParameters(uriInfo);
-
         final DOMMountPoint mountPoint = payload.getInstanceIdentifierContext().getMountPoint();
-        final TransactionVarsWrapper transactionNode = new TransactionVarsWrapper(
-                payload.getInstanceIdentifierContext(), mountPoint, getTransactionChainHandler(mountPoint));
-        return PostDataTransactionUtil.postData(uriInfo, payload, transactionNode,
+        final RestconfStrategy strategy = getRestconfStrategy(mountPoint);
+        return PostDataTransactionUtil.postData(uriInfo, payload, strategy,
                 getSchemaContext(mountPoint), checkedParms.insert, checkedParms.point);
     }
 
     @Override
     public Response deleteData(final String identifier) {
-        final SchemaContextRef schemaContextRef = new SchemaContextRef(this.schemaContextHandler.get());
         final InstanceIdentifierContext<?> instanceIdentifier = ParserIdentifier.toInstanceIdentifier(
-                identifier, schemaContextRef.get(), Optional.of(this.mountPointServiceHandler.get()));
+                identifier, this.schemaContextHandler.get(), Optional.of(this.mountPointServiceHandler.get()));
 
         final DOMMountPoint mountPoint = instanceIdentifier.getMountPoint();
-        final TransactionChainHandler localTransactionChainHandler;
-        if (mountPoint == null) {
-            localTransactionChainHandler = this.transactionChainHandler;
-        } else {
-            localTransactionChainHandler = transactionChainOfMountPoint(mountPoint);
-        }
-
-        final TransactionVarsWrapper transactionNode = new TransactionVarsWrapper(instanceIdentifier, mountPoint,
-                localTransactionChainHandler);
-        return DeleteDataTransactionUtil.deleteData(transactionNode);
+        final RestconfStrategy strategy = getRestconfStrategy(mountPoint);
+        return DeleteDataTransactionUtil.deleteData(strategy, instanceIdentifier.getInstanceIdentifier());
     }
 
     @Override
@@ -292,9 +374,8 @@ public class RestconfDataServiceImpl implements RestconfDataService {
     @Override
     public PatchStatusContext patchData(final PatchContext context, final UriInfo uriInfo) {
         final DOMMountPoint mountPoint = requireNonNull(context).getInstanceIdentifierContext().getMountPoint();
-        final TransactionVarsWrapper transactionNode = new TransactionVarsWrapper(
-                context.getInstanceIdentifierContext(), mountPoint, getTransactionChainHandler(mountPoint));
-        return PatchDataTransactionUtil.patchData(context, transactionNode, getSchemaContext(mountPoint));
+        final RestconfStrategy strategy = getRestconfStrategy(mountPoint);
+        return PatchDataTransactionUtil.patchData(context, strategy, getSchemaContext(mountPoint));
     }
 
     @Override
@@ -309,59 +390,41 @@ public class RestconfDataServiceImpl implements RestconfDataService {
         PutDataTransactionUtil.validateListKeysEqualityInPayloadAndUri(payload);
 
         final DOMMountPoint mountPoint = payload.getInstanceIdentifierContext().getMountPoint();
-        final TransactionChainHandler localTransactionChainHandler;
-        final SchemaContextRef ref;
-        if (mountPoint == null) {
-            localTransactionChainHandler = this.transactionChainHandler;
-            ref = new SchemaContextRef(this.schemaContextHandler.get());
-        } else {
-            localTransactionChainHandler = transactionChainOfMountPoint(mountPoint);
-            ref = new SchemaContextRef(mountPoint.getEffectiveModelContext());
-        }
-
-        final TransactionVarsWrapper transactionNode = new TransactionVarsWrapper(
-                payload.getInstanceIdentifierContext(), mountPoint, localTransactionChainHandler);
-
-        return PlainPatchDataTransactionUtil.patchData(payload, transactionNode, ref);
-    }
+        final EffectiveModelContext ref = mountPoint == null
+                ? this.schemaContextHandler.get() : modelContext(mountPoint);
+        final RestconfStrategy strategy = getRestconfStrategy(mountPoint);
 
-    private TransactionChainHandler getTransactionChainHandler(final DOMMountPoint mountPoint) {
-        return mountPoint == null ? transactionChainHandler : transactionChainOfMountPoint(mountPoint);
+        return PlainPatchDataTransactionUtil.patchData(payload, strategy, ref);
     }
 
-    private SchemaContextRef getSchemaContext(final DOMMountPoint mountPoint) {
-        return mountPoint == null ? new SchemaContextRef(schemaContextHandler.get())
-                : new SchemaContextRef(mountPoint.getEffectiveModelContext());
+    private EffectiveModelContext getSchemaContext(final DOMMountPoint mountPoint) {
+        return mountPoint == null ? schemaContextHandler.get() : modelContext(mountPoint);
     }
 
-    /**
-     * Prepare transaction chain to access data of mount point.
-     * @param mountPoint
-     *            mount point reference
-     * @return {@link TransactionChainHandler}
-     */
-    private static TransactionChainHandler transactionChainOfMountPoint(final @NonNull DOMMountPoint mountPoint) {
-        final Optional<DOMDataBroker> domDataBrokerService = mountPoint.getService(DOMDataBroker.class);
-        if (domDataBrokerService.isPresent()) {
-            return new TransactionChainHandler(domDataBrokerService.get());
+    // FIXME: why is this synchronized?
+    public synchronized RestconfStrategy getRestconfStrategy(final DOMMountPoint mountPoint) {
+        if (mountPoint == null) {
+            return new MdsalRestconfStrategy(transactionChainHandler);
         }
 
-        final String errMsg = "DOM data broker service isn't available for mount point " + mountPoint.getIdentifier();
-        LOG.warn(errMsg);
-        throw new RestconfDocumentedException(errMsg);
+        return RestconfStrategy.forMountPoint(mountPoint).orElseThrow(() -> {
+            LOG.warn("Mount point {} does not expose a suitable access interface", mountPoint.getIdentifier());
+            return new RestconfDocumentedException("Could not find a supported access interface in mount point "
+                + mountPoint.getIdentifier());
+        });
     }
 
     /**
      * Invoke Action operation.
      *
-     * @param payload
-     *             {@link NormalizedNodeContext} - the body of the operation
+     * @param payload {@link NormalizedNodeContext} - the body of the operation
      * @return {@link NormalizedNodeContext} wrapped in {@link Response}
      */
     public Response invokeAction(final NormalizedNodeContext payload) {
         final InstanceIdentifierContext<?> context = payload.getInstanceIdentifierContext();
         final DOMMountPoint mountPoint = context.getMountPoint();
-        final SchemaPath schemaPath = context.getSchemaNode().getPath();
+        final Absolute schemaPath = Absolute.of(ImmutableList.copyOf(context.getSchemaNode().getPath()
+            .getPathFromRoot()));
         final YangInstanceIdentifier yangIIdContext = context.getInstanceIdentifier();
         final NormalizedNode<?, ?> data = payload.getData();
 
@@ -371,15 +434,15 @@ public class RestconfDataServiceImpl implements RestconfDataService {
         }
 
         final DOMActionResult response;
-        final SchemaContextRef schemaContextRef;
+        final EffectiveModelContext schemaContextRef;
         if (mountPoint != null) {
             response = RestconfInvokeOperationsUtil.invokeActionViaMountPoint(mountPoint, (ContainerNode) data,
                 schemaPath, yangIIdContext);
-            schemaContextRef = new SchemaContextRef(mountPoint.getEffectiveModelContext());
+            schemaContextRef = modelContext(mountPoint);
         } else {
             response = RestconfInvokeOperationsUtil.invokeAction((ContainerNode) data, schemaPath,
                 this.actionServiceHandler, yangIIdContext);
-            schemaContextRef = new SchemaContextRef(this.schemaContextHandler.get());
+            schemaContextRef = this.schemaContextHandler.get();
         }
         final DOMActionResult result = RestconfInvokeOperationsUtil.checkActionResponse(response);
 
@@ -398,6 +461,12 @@ public class RestconfDataServiceImpl implements RestconfDataService {
         }
 
         return Response.status(200).entity(new NormalizedNodeContext(new InstanceIdentifierContext<>(yangIIdContext,
-                resultNodeSchema, mountPoint, schemaContextRef.get()), resultData)).build();
+                resultNodeSchema, mountPoint, schemaContextRef), resultData)).build();
+    }
+
+    private static EffectiveModelContext modelContext(final DOMMountPoint mountPoint) {
+        return mountPoint.getService(DOMSchemaService.class)
+            .flatMap(svc -> Optional.ofNullable(svc.getGlobalContext()))
+            .orElse(null);
     }
 }