samza-api/src/main/java/org/apache/samza/annotation/InterfaceStability.java

/**
 * 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.samza.annotation;

import java.lang.annotation.Documented;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;

/**
 * Annotation to inform users of how much to rely on a particular package,
 * class or method not changing over time. Currently the stability can be
 * {@link Stable}, {@link Evolving} or {@link Unstable}. <br>
 */
@InterfaceStability.Evolving
public class InterfaceStability {
  /**
   * Can evolve while retaining compatibility for minor release boundaries.;
   * can break compatibility only at major release (ie. at m.0).
   */
  @Documented
  @Retention(RetentionPolicy.RUNTIME)
  public @interface Stable { }

  /**
   * Evolving, but can break compatibility at minor release (i.e. m.x)
   */
  @Documented
  @Retention(RetentionPolicy.RUNTIME)
  public @interface Evolving { }

  /**
   * No guarantee is provided as to reliability or stability across any
   * level of release granularity.
   */
  @Documented
  @Retention(RetentionPolicy.RUNTIME)
  public @interface Unstable { }
}