+++ /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 static com.google.common.base.Preconditions.checkArgument;
-import static java.util.Objects.requireNonNull;
-
-import com.google.common.annotations.VisibleForTesting;
-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 javax.xml.stream.XMLStreamException;
-import javax.xml.transform.dom.DOMResult;
-import org.opendaylight.mdsal.dom.api.DOMNotification;
-import org.opendaylight.mdsal.dom.api.DOMNotificationListener;
-import org.opendaylight.netconf.sal.restconf.impl.ControllerContext;
-import org.opendaylight.restconf.common.errors.RestconfDocumentedException;
-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.JSONCodecFactorySupplier;
-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.EffectiveModelContext;
-import org.opendaylight.yangtools.yang.model.api.stmt.SchemaNodeIdentifier.Absolute;
-import org.opendaylight.yangtools.yang.model.util.SchemaInferenceStack;
-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 final class NotificationListenerAdapter extends AbstractCommonSubscriber implements DOMNotificationListener {
- private static final Logger LOG = LoggerFactory.getLogger(NotificationListenerAdapter.class);
-
- private final ControllerContext controllerContext;
- private final String streamName;
- private final Absolute path;
- private final String outputType;
-
- /**
- * 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 Absolute path, final String streamName, final String outputType,
- final ControllerContext controllerContext) {
- register(this);
- this.outputType = requireNonNull(outputType);
- this.path = requireNonNull(path);
- checkArgument(streamName != null && !streamName.isEmpty());
- this.streamName = streamName;
- this.controllerContext = controllerContext;
- }
-
- /**
- * Get outputType of listener.
- *
- * @return the outputType
- */
- @Override
- public String getOutputType() {
- return outputType;
- }
-
- @Override
- public void onNotification(final DOMNotification notification) {
- final Instant now = Instant.now();
- if (!checkStartStop(now, this)) {
- return;
- }
-
- final EffectiveModelContext schemaContext = controllerContext.getGlobalSchema();
- final String xml = prepareXml(schemaContext, notification);
- if (checkFilter(xml)) {
- prepareAndPostData(outputType.equals("JSON") ? prepareJson(schemaContext, notification) : xml);
- }
- }
-
- /**
- * Get stream name of this listener.
- *
- * @return {@link String}
- */
- @Override
- public String getStreamName() {
- return streamName;
- }
-
- /**
- * Get schema path of notification.
- *
- * @return {@link Absolute} SchemaNodeIdentifier
- */
- public Absolute getSchemaPath() {
- return path;
- }
-
- /**
- * Prepare data of notification and data to client.
- *
- * @param data data
- */
- private void prepareAndPostData(final String data) {
- final Event event = new Event(EventType.NOTIFY);
- event.setData(data);
- post(event);
- }
-
- /**
- * Prepare json from notification data.
- *
- * @return json as {@link String}
- */
- @VisibleForTesting
- String prepareJson(final EffectiveModelContext schemaContext, final DOMNotification notification) {
- final JsonObject json = new JsonObject();
- json.add("ietf-restconf:notification", JsonParser.parseString(writeBodyToString(schemaContext, notification)));
- json.addProperty("event-time", ListenerAdapter.toRFC3339(Instant.now()));
- return json.toString();
- }
-
- private static String writeBodyToString(final EffectiveModelContext schemaContext,
- final DOMNotification notification) {
- final Writer writer = new StringWriter();
- final NormalizedNodeStreamWriter jsonStream = JSONNormalizedNodeStreamWriter.createExclusiveWriter(
- JSONCodecFactorySupplier.DRAFT_LHOTKA_NETMOD_YANG_JSON_02.getShared(schemaContext),
- notification.getType(), null, JsonWriterFactory.createJsonWriter(writer));
- final NormalizedNodeWriter nodeWriter = NormalizedNodeWriter.forStreamWriter(jsonStream);
- try {
- nodeWriter.write(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 EffectiveModelContext schemaContext, final DOMNotification notification) {
- 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, schemaContext, notification);
- notificationElement.appendChild(notificationEventElement);
-
- return transformDoc(doc);
- }
-
- private void addValuesToNotificationEventElement(final Document doc, final Element element,
- final EffectiveModelContext schemaContext, final DOMNotification notification) {
- try {
- final DOMResult domResult = writeNormalizedNode(notification.getBody(),
- SchemaInferenceStack.of(schemaContext, path).toInference());
- 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