2 * Copyright (c) 2016 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
8 package org.opendaylight.controller.cluster.access.commands;
10 import static java.util.Objects.requireNonNull;
12 import com.google.common.base.MoreObjects;
13 import java.io.IOException;
14 import org.opendaylight.yangtools.yang.data.api.YangInstanceIdentifier;
15 import org.opendaylight.yangtools.yang.data.api.schema.stream.ReusableStreamReceiver;
16 import org.opendaylight.yangtools.yang.data.codec.binfmt.NormalizedNodeDataInput;
17 import org.opendaylight.yangtools.yang.data.codec.binfmt.NormalizedNodeDataOutput;
20 * An individual modification of a transaction's state. This class and its subclasses are not serializable, but rather
21 * expose {@link #writeTo(NormalizedNodeDataOutput)} and
22 * {@link #readFrom(NormalizedNodeDataInput, ReusableStreamReceiver)} methods for explicit serialization. The reason for
23 * this is that they are usually transmitted in bulk, hence it is advantageous to reuse
24 * a {@link NormalizedNodeDataOutput} instance to achieve better compression.
26 public abstract class TransactionModification {
27 static final byte TYPE_DELETE = 1;
28 static final byte TYPE_MERGE = 2;
29 static final byte TYPE_WRITE = 3;
31 private final YangInstanceIdentifier path;
33 TransactionModification(final YangInstanceIdentifier path) {
34 this.path = requireNonNull(path);
37 public final YangInstanceIdentifier getPath() {
42 public final String toString() {
43 return MoreObjects.toStringHelper(this).add("path", path).toString();
46 abstract byte getType();
48 void writeTo(final NormalizedNodeDataOutput out) throws IOException {
49 out.writeByte(getType());
50 out.writeYangInstanceIdentifier(path);
53 static TransactionModification readFrom(final NormalizedNodeDataInput in, final ReusableStreamReceiver writer)
55 final byte type = in.readByte();
56 return switch (type) {
57 case TYPE_DELETE -> new TransactionDelete(in.readYangInstanceIdentifier());
58 case TYPE_MERGE -> new TransactionMerge(in.readYangInstanceIdentifier(), in.readNormalizedNode(writer));
59 case TYPE_WRITE -> new TransactionWrite(in.readYangInstanceIdentifier(), in.readNormalizedNode(writer));
60 default -> throw new IllegalArgumentException("Unhandled type " + type);