org.apache.bookkeeper.client.api.LedgersIterator Maven / Gradle / Ivy
/*
* 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;
}