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;
10 import static com.google.common.base.Preconditions.checkArgument;
12 import com.google.common.annotations.VisibleForTesting;
13 import java.io.DataInput;
14 import java.io.DataOutput;
15 import java.io.IOException;
16 import org.eclipse.jdt.annotation.NonNull;
17 import org.opendaylight.yangtools.concepts.WritableObject;
18 import org.opendaylight.yangtools.yang.data.codec.binfmt.NormalizedNodeStreamVersion;
19 import org.slf4j.Logger;
20 import org.slf4j.LoggerFactory;
23 * Enumeration of all ABI versions supported by this implementation of the client access API.
25 public enum ABIVersion implements WritableObject {
26 // NOTE: enumeration values need to be sorted in ascending order of their version to keep Comparable working
29 * Version which is older than any other version. This version exists purely for testing purposes.
32 TEST_PAST_VERSION(0) {
34 public NormalizedNodeStreamVersion getStreamVersion() {
35 throw new UnsupportedOperationException();
45 * Oldest ABI version we support. The messages remain the same as {@code MAGNESIUM}, the serialization proxies in
46 * use are flat objects without any superclasses.
50 public NormalizedNodeStreamVersion getStreamVersion() {
51 return NormalizedNodeStreamVersion.MAGNESIUM;
56 * Version which is newer than any other version. This version exists purely for testing purposes.
59 TEST_FUTURE_VERSION(65535) {
61 public NormalizedNodeStreamVersion getStreamVersion() {
62 throw new UnsupportedOperationException();
66 private static final Logger LOG = LoggerFactory.getLogger(ABIVersion.class);
68 private final short value;
70 ABIVersion(final int intVersion) {
71 checkArgument(intVersion >= 0 && intVersion <= 65535);
72 value = (short) intVersion;
76 * Return the unsigned short integer identifying this version.
78 * @return Unsigned short integer identifying this version
80 public short shortValue() {
85 * Return the codebase-native ABI version. This version is the default version allocated to messages at runtime.
86 * Conversion to previous versions may incur additional overhead (such as object allocation).
88 * @return Current {@link ABIVersion}
90 public static @NonNull ABIVersion current() {
95 * Return the {@link ABIVersion} corresponding to an unsigned short integer. This method is provided for callers
96 * which provide their own recovery strategy in case of version incompatibility.
98 * @param value Short integer as returned from {@link #shortValue()}
99 * @return {@link ABIVersion}
100 * @throws FutureVersionException if the specified integer identifies a future version
101 * @throws PastVersionException if the specified integer identifies a past version which is no longer supported
103 public static @NonNull ABIVersion valueOf(final short value) throws FutureVersionException, PastVersionException {
104 return switch (Short.toUnsignedInt(value)) {
105 case 0, 1, 2, 3, 4, 6, 7, 8 -> throw new PastVersionException(value, CHLORINE_SR2);
106 case 9 -> CHLORINE_SR2;
107 default -> throw new FutureVersionException(value, CHLORINE_SR2);
112 * Return {@code true} if this version is earier than some {@code other} version.
114 * @param other Other {@link ABIVersion}
115 * @return {@code true} if {@code other is later}
116 * @throws NullPointerException if {@code other} is null
118 public boolean lt(final @NonNull ABIVersion other) {
119 return compareTo(other) < 0;
123 public void writeTo(final DataOutput out) throws IOException {
124 out.writeShort(value);
128 * Return the NormalizedNode stream version corresponding to this particular ABI.
130 * @return Stream Version to use for this ABI version
132 public abstract @NonNull NormalizedNodeStreamVersion getStreamVersion();
135 * Read an {@link ABIVersion} from a {@link DataInput}. This method is provided for callers which do not have
136 * a recovery strategy for dealing with unsupported versions.
138 * @param in Input from which to read
139 * @return An {@link ABIVersion}
140 * @throws IOException If read fails or an unsupported version is encountered
142 public static @NonNull ABIVersion readFrom(final @NonNull DataInput in) throws IOException {
143 final short s = in.readShort();
146 } catch (FutureVersionException | PastVersionException e) {
147 throw new IOException("Unsupported version", e);
151 public static @NonNull ABIVersion inexactReadFrom(final @NonNull DataInput in) throws IOException {
152 final short onWire = in.readShort();
154 return ABIVersion.valueOf(onWire);
155 } catch (FutureVersionException e) {
156 LOG.debug("Received future version", e);
157 return ABIVersion.TEST_FUTURE_VERSION;
158 } catch (PastVersionException e) {
159 LOG.debug("Received past version", e);
160 return ABIVersion.TEST_PAST_VERSION;