Carmelo Cascone | 1022a4e | 2017-05-25 00:16:18 -0400 | [diff] [blame^] | 1 | /* |
| 2 | * Copyright 2017-present Open Networking Laboratory |
| 3 | * |
| 4 | * Licensed under the Apache License, Version 2.0 (the "License"); |
| 5 | * you may not use this file except in compliance with the License. |
| 6 | * You may obtain a copy of the License at |
| 7 | * |
| 8 | * http://www.apache.org/licenses/LICENSE-2.0 |
| 9 | * |
| 10 | * Unless required by applicable law or agreed to in writing, software |
| 11 | * distributed under the License is distributed on an "AS IS" BASIS, |
| 12 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| 13 | * See the License for the specific language governing permissions and |
| 14 | * limitations under the License. |
| 15 | */ |
| 16 | |
| 17 | package org.onosproject.net.pi.runtime; |
| 18 | |
| 19 | import com.google.common.annotations.Beta; |
| 20 | import com.google.common.base.MoreObjects; |
| 21 | import com.google.common.base.Objects; |
| 22 | import com.google.common.collect.ImmutableSet; |
| 23 | import com.google.common.collect.Maps; |
| 24 | |
| 25 | import java.util.Collection; |
| 26 | import java.util.Map; |
| 27 | import java.util.Optional; |
| 28 | |
| 29 | import static com.google.common.base.Preconditions.checkArgument; |
| 30 | import static com.google.common.base.Preconditions.checkNotNull; |
| 31 | |
| 32 | /** |
| 33 | * Table entry in a protocol-independent pipeline. |
| 34 | */ |
| 35 | @Beta |
| 36 | public final class PiTableEntry { |
| 37 | |
| 38 | private static final int NO_PRIORITY = -1; |
| 39 | private static final double NO_TIMEOUT = -1; |
| 40 | |
| 41 | private final PiTableId tableId; |
| 42 | private final Collection<PiFieldMatch> fieldMatches; |
| 43 | private final PiTableAction tableAction; |
| 44 | private final long cookie; |
| 45 | private final int priority; |
| 46 | private final double timeout; |
| 47 | |
| 48 | private PiTableEntry(PiTableId tableId, Map<PiHeaderFieldId, PiFieldMatch> fieldMatches, |
| 49 | PiTableAction tableAction, long cookie, int priority, double timeout) { |
| 50 | this.tableId = tableId; |
| 51 | this.fieldMatches = ImmutableSet.copyOf(fieldMatches.values()); |
| 52 | this.tableAction = tableAction; |
| 53 | this.cookie = cookie; |
| 54 | this.priority = priority; |
| 55 | this.timeout = timeout; |
| 56 | } |
| 57 | |
| 58 | /** |
| 59 | * Returns the table where this entry is installed. |
| 60 | * |
| 61 | * @return table identifier |
| 62 | */ |
| 63 | public PiTableId table() { |
| 64 | return tableId; |
| 65 | } |
| 66 | |
| 67 | /** |
| 68 | * Returns an immutable view of the field matches of this table entry. |
| 69 | * |
| 70 | * @return collection of field matches |
| 71 | */ |
| 72 | public Collection<PiFieldMatch> fieldMatches() { |
| 73 | return fieldMatches; |
| 74 | } |
| 75 | |
| 76 | /** |
| 77 | * Returns the action of this table entry. |
| 78 | * |
| 79 | * @return action |
| 80 | */ |
| 81 | public PiTableAction action() { |
| 82 | return tableAction; |
| 83 | } |
| 84 | |
| 85 | /** |
| 86 | * Returns the cookie of this table entry. |
| 87 | * |
| 88 | * @return cookie |
| 89 | */ |
| 90 | public long cookie() { |
| 91 | return cookie; |
| 92 | } |
| 93 | |
| 94 | /** |
| 95 | * Returns the priority of this table entry, if present. |
| 96 | * If the priority value is not present, then this table entry has no explicit priority. |
| 97 | * |
| 98 | * @return optional priority |
| 99 | */ |
| 100 | public Optional<Integer> priority() { |
| 101 | return priority == NO_PRIORITY ? Optional.empty() : Optional.of(priority); |
| 102 | } |
| 103 | |
| 104 | /** |
| 105 | * Returns the timeout in seconds of this table entry, if present. |
| 106 | * If the timeout value is not present, then this table entry is meant to be permanent. |
| 107 | * |
| 108 | * @return optional timeout value in seconds |
| 109 | */ |
| 110 | public Optional<Double> timeout() { |
| 111 | return timeout == NO_TIMEOUT ? Optional.empty() : Optional.of(timeout); |
| 112 | } |
| 113 | |
| 114 | @Override |
| 115 | public boolean equals(Object o) { |
| 116 | if (this == o) { |
| 117 | return true; |
| 118 | } |
| 119 | if (o == null || getClass() != o.getClass()) { |
| 120 | return false; |
| 121 | } |
| 122 | PiTableEntry that = (PiTableEntry) o; |
| 123 | return priority == that.priority && |
| 124 | Double.compare(that.timeout, timeout) == 0 && |
| 125 | Objects.equal(tableId, that.tableId) && |
| 126 | Objects.equal(fieldMatches, that.fieldMatches) && |
| 127 | Objects.equal(tableAction, that.tableAction); |
| 128 | } |
| 129 | |
| 130 | @Override |
| 131 | public int hashCode() { |
| 132 | return Objects.hashCode(tableId, fieldMatches, tableAction, priority, timeout); |
| 133 | } |
| 134 | |
| 135 | @Override |
| 136 | public String toString() { |
| 137 | return MoreObjects.toStringHelper(this) |
| 138 | .add("tableId", tableId) |
| 139 | .add("fieldMatches", fieldMatches) |
| 140 | .add("tableAction", tableAction) |
| 141 | .add("priority", priority == NO_PRIORITY ? "N/A" : String.valueOf(priority)) |
| 142 | .add("timeout", timeout == NO_TIMEOUT ? "PERMANENT" : String.valueOf(timeout)) |
| 143 | .toString(); |
| 144 | } |
| 145 | |
| 146 | public static Builder builder() { |
| 147 | return new Builder(); |
| 148 | } |
| 149 | |
| 150 | public static final class Builder { |
| 151 | |
| 152 | private PiTableId tableId; |
| 153 | private Map<PiHeaderFieldId, PiFieldMatch> fieldMatches = Maps.newHashMap(); |
| 154 | private PiTableAction tableAction; |
| 155 | private long cookie = 0; |
| 156 | private int priority = NO_PRIORITY; |
| 157 | private double timeout = NO_TIMEOUT; |
| 158 | |
| 159 | private Builder() { |
| 160 | // Hides constructor. |
| 161 | } |
| 162 | |
| 163 | /** |
| 164 | * Sets the table identifier for this entry. |
| 165 | * |
| 166 | * @param tableId table identifier |
| 167 | * @return this |
| 168 | */ |
| 169 | Builder forTable(PiTableId tableId) { |
| 170 | this.tableId = checkNotNull(tableId); |
| 171 | return this; |
| 172 | } |
| 173 | |
| 174 | /** |
| 175 | * Sets the action of this table entry. |
| 176 | * |
| 177 | * @param tableAction table action |
| 178 | * @return this |
| 179 | */ |
| 180 | Builder withAction(PiTableAction tableAction) { |
| 181 | this.tableAction = checkNotNull(tableAction); |
| 182 | return this; |
| 183 | } |
| 184 | |
| 185 | /** |
| 186 | * Adds one field match to this table entry. |
| 187 | * |
| 188 | * @param fieldMatch field match |
| 189 | * @return this |
| 190 | */ |
| 191 | Builder withFieldMatch(PiFieldMatch fieldMatch) { |
| 192 | this.fieldMatches.put(fieldMatch.fieldId(), fieldMatch); |
| 193 | return this; |
| 194 | } |
| 195 | |
| 196 | /** |
| 197 | * Adds many field matches to this table entry. |
| 198 | * |
| 199 | * @param fieldMatches collection of field matches |
| 200 | * @return this |
| 201 | */ |
| 202 | Builder withFieldMatches(Collection<PiFieldMatch> fieldMatches) { |
| 203 | fieldMatches.forEach(f -> this.fieldMatches.put(f.fieldId(), f)); |
| 204 | return this; |
| 205 | } |
| 206 | |
| 207 | /** |
| 208 | * Sets the cookie, i.e. a controller-specific metadata. |
| 209 | * |
| 210 | * @param cookie cookie |
| 211 | * @return this |
| 212 | */ |
| 213 | Builder withCookie(long cookie) { |
| 214 | this.cookie = cookie; |
| 215 | return this; |
| 216 | } |
| 217 | |
| 218 | /** |
| 219 | * Sets the priority of this table entry. |
| 220 | * |
| 221 | * @param priority priority |
| 222 | * @return this |
| 223 | */ |
| 224 | Builder withPriority(int priority) { |
| 225 | checkArgument(priority >= 0, "Priority must be a positive integer."); |
| 226 | this.priority = priority; |
| 227 | return this; |
| 228 | } |
| 229 | |
| 230 | /** |
| 231 | * Sets the timeout of this table entry. |
| 232 | * |
| 233 | * @param seconds timeout in seconds |
| 234 | * @return this |
| 235 | */ |
| 236 | Builder withTimeout(double seconds) { |
| 237 | checkArgument(seconds > 0, "Timeout must be greater than zero."); |
| 238 | this.timeout = seconds; |
| 239 | return this; |
| 240 | } |
| 241 | |
| 242 | /** |
| 243 | * Builds the table entry. |
| 244 | * |
| 245 | * @return a new table entry |
| 246 | */ |
| 247 | PiTableEntry build() { |
| 248 | checkNotNull(tableId); |
| 249 | checkNotNull(tableAction); |
| 250 | return new PiTableEntry(tableId, fieldMatches, tableAction, cookie, priority, timeout); |
| 251 | } |
| 252 | } |
| 253 | } |