core/src/main/java/org/apache/accumulo/fate/ReadOnlyRepo.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.accumulo.fate;

/**
 * Read only access to a repeatable persisted operation.
 *
 * By definition, these methods are safe to call without impacting the state of FATE. They should
 * also be safe to call without impacting the state of system components.
 */
public interface ReadOnlyRepo<T> {

  long isReady(long tid, T environment) throws Exception;

  String getDescription();

}