/*
* 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.flink.core.fs;
import org.apache.flink.annotation.Public;
import java.io.IOException;
/**
* A BlockLocation lists hosts, offset and length of block.
*/
@Public
public interface BlockLocation extends Comparable<BlockLocation> {
/**
* Get the list of hosts (hostname) hosting this block.
*
* @return A list of hosts (hostname) hosting this block.
* @throws IOException
* thrown if the list of hosts could not be retrieved
*/
String[] getHosts() throws IOException;
/**
* Get the start offset of the file associated with this block.
*
* @return The start offset of the file associated with this block.
*/
long getOffset();
/**
* Get the length of the block.
*
* @return the length of the block
*/
long getLength();
}