| /** |
| * 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.pulsar.common.policies.data; |
| |
| /** |
| * Strategy to use when checking an auto-updated schema for compatibility to the current schema. |
| */ |
| public enum SchemaAutoUpdateCompatibilityStrategy { |
| /** |
| * Don't allow any auto updates. |
| */ |
| AutoUpdateDisabled, |
| |
| /** |
| * Messages written in the previous schema can be read by the new schema. |
| * To be backward compatible, the new schema must not add any new fields that |
| * don't have default values. However, it may remove fields. |
| */ |
| Backward, |
| |
| /** |
| * Messages written in the new schema can be read by the previous schema. |
| * To be forward compatible, the new schema must not remove any fields which |
| * don't have default values in the previous schema. However, it may add new fields. |
| */ |
| Forward, |
| |
| /** |
| * Backward and Forward. |
| */ |
| Full, |
| |
| /** |
| * Always Compatible - The new schema will not be checked for compatibility against |
| * old schemas. In other words, new schemas will always be marked assumed compatible. |
| */ |
| AlwaysCompatible, |
| |
| /** |
| * Be similar to Backward. BackwardTransitive ensure all previous version schema can |
| * be read by the new schema. |
| */ |
| BackwardTransitive, |
| |
| /** |
| * Be similar to Forward, ForwardTransitive ensure new schema can be ready by all previous |
| * version schema. |
| */ |
| ForwardTransitive, |
| |
| /** |
| * BackwardTransitive and ForwardTransitive. |
| */ |
| FullTransitive |
| } |