2 * Copyright (c) 2014, 2015 Cisco Systems, Inc. and others. All rights reserved.
4 * This program and the accompanying materials are made available under the
5 * terms of the Eclipse Public License v1.0 which accompanies this distribution,
6 * and is available at http://www.eclipse.org/legal/epl-v10.html
9 package org.opendaylight.controller.cluster.datastore.node.utils.stream;
11 import com.google.common.base.Preconditions;
12 import java.io.DataOutput;
13 import java.io.DataOutputStream;
14 import java.io.IOException;
15 import java.io.OutputStream;
16 import java.nio.charset.StandardCharsets;
17 import java.util.Collection;
18 import java.util.HashMap;
21 import org.opendaylight.yangtools.yang.common.QName;
22 import org.opendaylight.yangtools.yang.data.api.YangInstanceIdentifier;
23 import org.opendaylight.yangtools.yang.data.api.schema.NormalizedNode;
24 import org.opendaylight.yangtools.yang.data.api.schema.stream.NormalizedNodeStreamWriter;
25 import org.opendaylight.yangtools.yang.data.api.schema.stream.NormalizedNodeWriter;
26 import org.slf4j.Logger;
27 import org.slf4j.LoggerFactory;
30 * NormalizedNodeOutputStreamWriter will be used by distributed datastore to send normalized node in
32 * A stream writer wrapper around this class will write node objects to stream in recursive manner.
33 * for example - If you have a ContainerNode which has a two LeafNode as children, then
34 * you will first call {@link #startContainerNode(YangInstanceIdentifier.NodeIdentifier, int)}, then will call
35 * {@link #leafNode(YangInstanceIdentifier.NodeIdentifier, Object)} twice and then, {@link #endNode()} to end
38 * Based on the each node, the node type is also written to the stream, that helps in reconstructing the object,
44 public class NormalizedNodeOutputStreamWriter implements NormalizedNodeStreamWriter {
46 private static final Logger LOG = LoggerFactory.getLogger(NormalizedNodeOutputStreamWriter.class);
48 static final byte SIGNATURE_MARKER = (byte) 0xab;
49 static final short CURRENT_VERSION = (short) 1;
51 static final byte IS_CODE_VALUE = 1;
52 static final byte IS_STRING_VALUE = 2;
53 static final byte IS_NULL_VALUE = 3;
55 private final DataOutput output;
57 private final Map<String, Integer> stringCodeMap = new HashMap<>();
59 private NormalizedNodeWriter normalizedNodeWriter;
61 private boolean wroteSignatureMarker;
64 * @deprecated Use {@link #NormalizedNodeOutputStreamWriter(DataOutput)} instead.
67 public NormalizedNodeOutputStreamWriter(final OutputStream stream) throws IOException {
68 this((DataOutput) new DataOutputStream(Preconditions.checkNotNull(stream)));
71 public NormalizedNodeOutputStreamWriter(DataOutput output) {
72 this.output = Preconditions.checkNotNull(output);
75 private NormalizedNodeWriter normalizedNodeWriter() {
76 if(normalizedNodeWriter == null) {
77 normalizedNodeWriter = NormalizedNodeWriter.forStreamWriter(this);
80 return normalizedNodeWriter;
83 public void writeNormalizedNode(NormalizedNode<?, ?> node) throws IOException {
84 writeSignatureMarkerAndVersionIfNeeded();
85 normalizedNodeWriter().write(node);
88 private void writeSignatureMarkerAndVersionIfNeeded() throws IOException {
89 if(!wroteSignatureMarker) {
90 output.writeByte(SIGNATURE_MARKER);
91 output.writeShort(CURRENT_VERSION);
92 wroteSignatureMarker = true;
97 public void leafNode(YangInstanceIdentifier.NodeIdentifier name, Object value) throws IOException, IllegalArgumentException {
98 Preconditions.checkNotNull(name, "Node identifier should not be null");
99 LOG.debug("Writing a new leaf node");
100 startNode(name.getNodeType(), NodeTypes.LEAF_NODE);
106 public void startLeafSet(YangInstanceIdentifier.NodeIdentifier name, int childSizeHint) throws IOException, IllegalArgumentException {
107 Preconditions.checkNotNull(name, "Node identifier should not be null");
108 LOG.debug("Starting a new leaf set");
110 startNode(name.getNodeType(), NodeTypes.LEAF_SET);
114 public void leafSetEntryNode(Object value) throws IOException, IllegalArgumentException {
115 LOG.debug("Writing a new leaf set entry node");
117 output.writeByte(NodeTypes.LEAF_SET_ENTRY_NODE);
122 public void startContainerNode(YangInstanceIdentifier.NodeIdentifier name, int childSizeHint) throws IOException, IllegalArgumentException {
123 Preconditions.checkNotNull(name, "Node identifier should not be null");
125 LOG.debug("Starting a new container node");
127 startNode(name.getNodeType(), NodeTypes.CONTAINER_NODE);
131 public void startUnkeyedList(YangInstanceIdentifier.NodeIdentifier name, int childSizeHint) throws IOException, IllegalArgumentException {
132 Preconditions.checkNotNull(name, "Node identifier should not be null");
133 LOG.debug("Starting a new unkeyed list");
135 startNode(name.getNodeType(), NodeTypes.UNKEYED_LIST);
139 public void startUnkeyedListItem(YangInstanceIdentifier.NodeIdentifier name, int childSizeHint) throws IOException, IllegalStateException {
140 Preconditions.checkNotNull(name, "Node identifier should not be null");
141 LOG.debug("Starting a new unkeyed list item");
143 startNode(name.getNodeType(), NodeTypes.UNKEYED_LIST_ITEM);
147 public void startMapNode(YangInstanceIdentifier.NodeIdentifier name, int childSizeHint) throws IOException, IllegalArgumentException {
148 Preconditions.checkNotNull(name, "Node identifier should not be null");
149 LOG.debug("Starting a new map node");
151 startNode(name.getNodeType(), NodeTypes.MAP_NODE);
155 public void startMapEntryNode(YangInstanceIdentifier.NodeIdentifierWithPredicates identifier, int childSizeHint) throws IOException, IllegalArgumentException {
156 Preconditions.checkNotNull(identifier, "Node identifier should not be null");
157 LOG.debug("Starting a new map entry node");
158 startNode(identifier.getNodeType(), NodeTypes.MAP_ENTRY_NODE);
160 writeKeyValueMap(identifier.getKeyValues());
165 public void startOrderedMapNode(YangInstanceIdentifier.NodeIdentifier name, int childSizeHint) throws IOException, IllegalArgumentException {
166 Preconditions.checkNotNull(name, "Node identifier should not be null");
167 LOG.debug("Starting a new ordered map node");
169 startNode(name.getNodeType(), NodeTypes.ORDERED_MAP_NODE);
173 public void startChoiceNode(YangInstanceIdentifier.NodeIdentifier name, int childSizeHint) throws IOException, IllegalArgumentException {
174 Preconditions.checkNotNull(name, "Node identifier should not be null");
175 LOG.debug("Starting a new choice node");
177 startNode(name.getNodeType(), NodeTypes.CHOICE_NODE);
181 public void startAugmentationNode(YangInstanceIdentifier.AugmentationIdentifier identifier) throws IOException, IllegalArgumentException {
182 Preconditions.checkNotNull(identifier, "Node identifier should not be null");
183 LOG.debug("Starting a new augmentation node");
185 output.writeByte(NodeTypes.AUGMENTATION_NODE);
186 writeQNameSet(identifier.getPossibleChildNames());
190 public void anyxmlNode(YangInstanceIdentifier.NodeIdentifier name, Object value) throws IOException, IllegalArgumentException {
191 Preconditions.checkNotNull(name, "Node identifier should not be null");
192 LOG.debug("Writing a new xml node");
194 startNode(name.getNodeType(), NodeTypes.ANY_XML_NODE);
200 public void endNode() throws IOException, IllegalStateException {
201 LOG.debug("Ending the node");
203 output.writeByte(NodeTypes.END_NODE);
207 public void close() throws IOException {
212 public void flush() throws IOException {
213 if (output instanceof OutputStream) {
214 ((OutputStream)output).flush();
218 private void startNode(final QName qName, byte nodeType) throws IOException {
220 Preconditions.checkNotNull(qName, "QName of node identifier should not be null.");
222 writeSignatureMarkerAndVersionIfNeeded();
224 // First write the type of node
225 output.writeByte(nodeType);
230 private void writeQName(QName qName) throws IOException {
232 writeCodedString(qName.getLocalName());
233 writeCodedString(qName.getNamespace().toString());
234 writeCodedString(qName.getFormattedRevision());
237 private void writeCodedString(String key) throws IOException {
238 Integer value = stringCodeMap.get(key);
240 output.writeByte(IS_CODE_VALUE);
241 output.writeInt(value);
244 output.writeByte(IS_STRING_VALUE);
245 stringCodeMap.put(key, Integer.valueOf(stringCodeMap.size()));
246 output.writeUTF(key);
248 output.writeByte(IS_NULL_VALUE);
253 private void writeObjSet(Set<?> set) throws IOException {
255 output.writeInt(set.size());
257 if(o instanceof String){
258 writeCodedString(o.toString());
260 throw new IllegalArgumentException("Expected value type to be String but was : " +
269 public void writeYangInstanceIdentifier(YangInstanceIdentifier identifier) throws IOException {
270 writeSignatureMarkerAndVersionIfNeeded();
271 writeYangInstanceIdentifierInternal(identifier);
274 private void writeYangInstanceIdentifierInternal(YangInstanceIdentifier identifier) throws IOException {
275 Collection<YangInstanceIdentifier.PathArgument> pathArguments = identifier.getPathArguments();
276 output.writeInt(pathArguments.size());
278 for(YangInstanceIdentifier.PathArgument pathArgument : pathArguments) {
279 writePathArgument(pathArgument);
283 public void writePathArgument(YangInstanceIdentifier.PathArgument pathArgument) throws IOException {
285 byte type = PathArgumentTypes.getSerializablePathArgumentType(pathArgument);
287 output.writeByte(type);
290 case PathArgumentTypes.NODE_IDENTIFIER :
292 YangInstanceIdentifier.NodeIdentifier nodeIdentifier =
293 (YangInstanceIdentifier.NodeIdentifier) pathArgument;
295 writeQName(nodeIdentifier.getNodeType());
298 case PathArgumentTypes.NODE_IDENTIFIER_WITH_PREDICATES:
300 YangInstanceIdentifier.NodeIdentifierWithPredicates nodeIdentifierWithPredicates =
301 (YangInstanceIdentifier.NodeIdentifierWithPredicates) pathArgument;
302 writeQName(nodeIdentifierWithPredicates.getNodeType());
304 writeKeyValueMap(nodeIdentifierWithPredicates.getKeyValues());
307 case PathArgumentTypes.NODE_IDENTIFIER_WITH_VALUE :
309 YangInstanceIdentifier.NodeWithValue nodeWithValue =
310 (YangInstanceIdentifier.NodeWithValue) pathArgument;
312 writeQName(nodeWithValue.getNodeType());
313 writeObject(nodeWithValue.getValue());
316 case PathArgumentTypes.AUGMENTATION_IDENTIFIER :
318 YangInstanceIdentifier.AugmentationIdentifier augmentationIdentifier =
319 (YangInstanceIdentifier.AugmentationIdentifier) pathArgument;
321 // No Qname in augmentation identifier
322 writeQNameSet(augmentationIdentifier.getPossibleChildNames());
325 throw new IllegalStateException("Unknown node identifier type is found : " + pathArgument.getClass().toString() );
329 private void writeKeyValueMap(Map<QName, Object> keyValueMap) throws IOException {
330 if(keyValueMap != null && !keyValueMap.isEmpty()) {
331 output.writeInt(keyValueMap.size());
332 Set<QName> qNameSet = keyValueMap.keySet();
334 for(QName qName : qNameSet) {
336 writeObject(keyValueMap.get(qName));
343 private void writeQNameSet(Set<QName> children) throws IOException {
344 // Write each child's qname separately, if list is empty send count as 0
345 if(children != null && !children.isEmpty()) {
346 output.writeInt(children.size());
347 for(QName qName : children) {
351 LOG.debug("augmentation node does not have any child");
356 private void writeObject(Object value) throws IOException {
358 byte type = ValueTypes.getSerializableType(value);
359 // Write object type first
360 output.writeByte(type);
363 case ValueTypes.BOOL_TYPE:
364 output.writeBoolean((Boolean) value);
366 case ValueTypes.QNAME_TYPE:
367 writeQName((QName) value);
369 case ValueTypes.INT_TYPE:
370 output.writeInt((Integer) value);
372 case ValueTypes.BYTE_TYPE:
373 output.writeByte((Byte) value);
375 case ValueTypes.LONG_TYPE:
376 output.writeLong((Long) value);
378 case ValueTypes.SHORT_TYPE:
379 output.writeShort((Short) value);
381 case ValueTypes.BITS_TYPE:
382 writeObjSet((Set<?>) value);
384 case ValueTypes.BINARY_TYPE:
385 byte[] bytes = (byte[]) value;
386 output.writeInt(bytes.length);
389 case ValueTypes.YANG_IDENTIFIER_TYPE:
390 writeYangInstanceIdentifierInternal((YangInstanceIdentifier) value);
392 case ValueTypes.NULL_TYPE :
394 case ValueTypes.STRING_BYTES_TYPE:
395 final byte[] valueBytes = value.toString().getBytes(StandardCharsets.UTF_8);
396 output.writeInt(valueBytes.length);
397 output.write(valueBytes);
400 output.writeUTF(value.toString());