| /* |
| * Licensed to the Apache Software Foundation (ASF) under one |
| * or more contributor license agreements. See the NOTICE file |
| * distributed with this work for additional information |
| * regarding copyright ownership. The ASF licenses this file |
| * to you under the Apache License, Version 2.0 (the |
| * "License"); you may not use this file except in compliance |
| * with the License. You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| package org.apache.cassandra.net; |
| |
| import static java.lang.Math.max; |
| |
| /** |
| * Binary message flags to be passed as {@code flags} field of {@link Message}. |
| */ |
| public enum MessageFlag |
| { |
| /** a failure response should be sent back in case of failure */ |
| CALL_BACK_ON_FAILURE (0), |
| /** track repaired data - see CASSANDRA-14145 */ |
| TRACK_REPAIRED_DATA (1); |
| |
| private final int id; |
| |
| MessageFlag(int id) |
| { |
| this.id = id; |
| } |
| |
| /** |
| * @return {@code true} if the flag is present in provided flags, {@code false} otherwise |
| */ |
| boolean isIn(int flags) |
| { |
| return (flags & (1 << id)) != 0; |
| } |
| |
| /** |
| * @return new flags value with this flag added |
| */ |
| int addTo(int flags) |
| { |
| return flags | (1 << id); |
| } |
| |
| private static final MessageFlag[] idToFlagMap; |
| static |
| { |
| MessageFlag[] flags = values(); |
| |
| int max = -1; |
| for (MessageFlag flag : flags) |
| max = max(flag.id, max); |
| |
| MessageFlag[] idMap = new MessageFlag[max + 1]; |
| for (MessageFlag flag : flags) |
| { |
| if (idMap[flag.id] != null) |
| throw new RuntimeException("Two MessageFlag-s that map to the same id: " + flag.id); |
| idMap[flag.id] = flag; |
| } |
| idToFlagMap = idMap; |
| } |
| |
| @SuppressWarnings("unused") |
| MessageFlag lookUpById(int id) |
| { |
| if (id < 0) |
| throw new IllegalArgumentException("MessageFlag id must be non-negative (got " + id + ')'); |
| |
| return id < idToFlagMap.length ? idToFlagMap[id] : null; |
| } |
| } |
| |