--- /dev/null
+/*
+ * Copyright (c) 2016 Cisco Systems, Inc. and others. All rights reserved.
+ *
+ * This program and the accompanying materials are made available under the
+ * terms of the Eclipse Public License v1.0 which accompanies this distribution,
+ * and is available at http://www.eclipse.org/legal/epl-v10.html
+ */
+package org.opendaylight.netconf.sal.streams.listeners;
+
+import com.google.common.annotations.VisibleForTesting;
+import com.google.common.base.Preconditions;
+import com.google.gson.JsonObject;
+import com.google.gson.JsonParser;
+import java.io.IOException;
+import java.io.StringWriter;
+import java.io.Writer;
+import java.time.Instant;
+import java.util.Collection;
+import javax.xml.stream.XMLStreamException;
+import javax.xml.transform.dom.DOMResult;
+import org.opendaylight.controller.md.sal.dom.api.DOMNotification;
+import org.opendaylight.controller.md.sal.dom.api.DOMNotificationListener;
+import org.opendaylight.netconf.sal.restconf.impl.ControllerContext;
+import org.opendaylight.netconf.sal.restconf.impl.RestconfDocumentedException;
+import org.opendaylight.yangtools.yang.data.api.YangInstanceIdentifier.NodeIdentifier;
+import org.opendaylight.yangtools.yang.data.api.YangInstanceIdentifier.PathArgument;
+import org.opendaylight.yangtools.yang.data.api.schema.DataContainerChild;
+import org.opendaylight.yangtools.yang.data.api.schema.NormalizedNode;
+import org.opendaylight.yangtools.yang.data.api.schema.stream.NormalizedNodeStreamWriter;
+import org.opendaylight.yangtools.yang.data.api.schema.stream.NormalizedNodeWriter;
+import org.opendaylight.yangtools.yang.data.codec.gson.JSONCodecFactory;
+import org.opendaylight.yangtools.yang.data.codec.gson.JSONNormalizedNodeStreamWriter;
+import org.opendaylight.yangtools.yang.data.codec.gson.JsonWriterFactory;
+import org.opendaylight.yangtools.yang.model.api.SchemaContext;
+import org.opendaylight.yangtools.yang.model.api.SchemaPath;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+import org.w3c.dom.Document;
+import org.w3c.dom.Element;
+import org.w3c.dom.Node;
+
+/**
+ * {@link NotificationListenerAdapter} is responsible to track events on
+ * notifications.
+ *
+ */
+public class NotificationListenerAdapter extends AbstractCommonSubscriber implements DOMNotificationListener {
+
+ private static final Logger LOG = LoggerFactory.getLogger(NotificationListenerAdapter.class);
+
+ private final String streamName;
+ private final SchemaPath path;
+ private final String outputType;
+
+ private SchemaContext schemaContext;
+ private DOMNotification notification;
+
+ /**
+ * Set path of listener and stream name, register event bus.
+ *
+ * @param path
+ * path of notification
+ * @param streamName
+ * stream name of listener
+ * @param outputType
+ * type of output on notification (JSON, XML)
+ */
+ NotificationListenerAdapter(final SchemaPath path, final String streamName, final String outputType) {
+ super();
+ register(this);
+ setLocalNameOfPath(path.getLastComponent().getLocalName());
+
+ this.outputType = Preconditions.checkNotNull(outputType);
+ this.path = Preconditions.checkNotNull(path);
+ Preconditions.checkArgument(streamName != null && !streamName.isEmpty());
+ this.streamName = streamName;
+ }
+
+ /**
+ * Get outputType of listener.
+ *
+ * @return the outputType
+ */
+ @Override
+ public String getOutputType() {
+ return this.outputType;
+ }
+
+ @Override
+ public void onNotification(final DOMNotification notification) {
+ this.schemaContext = ControllerContext.getInstance().getGlobalSchema();
+ this.notification = notification;
+
+ final String xml = prepareXml();
+ if (checkQueryParams(xml, this)) {
+ prepareAndPostData(xml);
+ }
+ }
+
+ /**
+ * Get stream name of this listener.
+ *
+ * @return {@link String}
+ */
+ @Override
+ public String getStreamName() {
+ return this.streamName;
+ }
+
+ /**
+ * Get schema path of notification.
+ *
+ * @return {@link SchemaPath}
+ */
+ public SchemaPath getSchemaPath() {
+ return this.path;
+ }
+
+ /**
+ * Prepare data of notification and data to client.
+ *
+ * @param xml data
+ */
+ private void prepareAndPostData(final String xml) {
+ final Event event = new Event(EventType.NOTIFY);
+ if (this.outputType.equals("JSON")) {
+ event.setData(prepareJson());
+ } else {
+ event.setData(xml);
+ }
+ post(event);
+ }
+
+ /**
+ * Prepare json from notification data.
+ *
+ * @return json as {@link String}
+ */
+ @VisibleForTesting
+ String prepareJson() {
+ JsonParser jsonParser = new JsonParser();
+ JsonObject json = new JsonObject();
+ json.add("ietf-restconf:notification", jsonParser.parse(writeBodyToString()));
+ json.addProperty("event-time", ListenerAdapter.toRFC3339(Instant.now()));
+ return json.toString();
+ }
+
+ @VisibleForTesting
+ void setNotification(final DOMNotification notification) {
+ this.notification = Preconditions.checkNotNull(notification);
+ }
+
+ @VisibleForTesting
+ void setSchemaContext(final SchemaContext schemaContext) {
+ this.schemaContext = Preconditions.checkNotNull(schemaContext);
+ }
+
+ private String writeBodyToString() {
+ final Writer writer = new StringWriter();
+ final NormalizedNodeStreamWriter jsonStream =
+ JSONNormalizedNodeStreamWriter.createExclusiveWriter(JSONCodecFactory.getShared(this.schemaContext),
+ this.notification.getType(), null, JsonWriterFactory.createJsonWriter(writer));
+ final NormalizedNodeWriter nodeWriter = NormalizedNodeWriter.forStreamWriter(jsonStream);
+ try {
+ nodeWriter.write(this.notification.getBody());
+ nodeWriter.close();
+ } catch (final IOException e) {
+ throw new RestconfDocumentedException("Problem while writing body of notification to JSON. ", e);
+ }
+ return writer.toString();
+ }
+
+ private String prepareXml() {
+ final Document doc = createDocument();
+ final Element notificationElement = basePartDoc(doc);
+
+ final Element notificationEventElement = doc.createElementNS(
+ "urn:opendaylight:params:xml:ns:yang:controller:md:sal:remote", "create-notification-stream");
+ addValuesToNotificationEventElement(doc, notificationEventElement, this.notification, this.schemaContext);
+ notificationElement.appendChild(notificationEventElement);
+
+ return transformDoc(doc);
+ }
+
+ private void addValuesToNotificationEventElement(final Document doc, final Element element,
+ final DOMNotification notification, final SchemaContext schemaContext) {
+ if (notification == null) {
+ return;
+ }
+
+ final NormalizedNode<NodeIdentifier, Collection<DataContainerChild<? extends PathArgument, ?>>> body =
+ notification.getBody();
+ try {
+
+ final DOMResult domResult = writeNormalizedNode(body, schemaContext, this.path);
+ final Node result = doc.importNode(domResult.getNode().getFirstChild(), true);
+ final Element dataElement = doc.createElement("notification");
+ dataElement.appendChild(result);
+ element.appendChild(dataElement);
+ } catch (final IOException e) {
+ LOG.error("Error in writer ", e);
+ } catch (final XMLStreamException e) {
+ LOG.error("Error processing stream", e);
+ }
+ }
+}
Code Review / netconf.git / blobdiff