| /* |
| * Copyright 2020 The Apache Software Foundation. |
| * |
| * Licensed 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.bookkeeper.client.api; |
| |
| import java.io.IOException; |
| |
| /** |
| * Iterator for ledgers. |
| */ |
| public interface LedgersIterator { |
| |
| /** |
| * Return true if there is at least one ledger to visit. |
| * |
| * @return true if there is at least one ledger to visit. |
| * @throws IOException thrown when there is a problem accessing the ledger metadata store. |
| */ |
| boolean hasNext() throws IOException; |
| |
| /** |
| * Return next ledger id. |
| * |
| * @return next ledger id. |
| * @throws IOException thrown when there is a problem accessing the ledger metadata store. |
| */ |
| long next() throws IOException; |
| |
| } |