org.apache.cassandra.io.util.FileStoreUtils Maven / Gradle / Ivy
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The Apache Cassandra Project develops a highly scalable second-generation distributed database, bringing together Dynamo's fully distributed design and Bigtable's ColumnFamily-based data model.
/*
* 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.cassandra.io.util;
import java.io.IOException;
import java.nio.file.FileStore;
import java.util.function.Consumer;
public class FileStoreUtils
{
/**
* Try and get the total space of the given filestore
* @return long value of available space if no errors
* Long.MAX_VALUE if on a large file system that overflows
* 0 on exception during IOToLongFunction
*/
public static long tryGetSpace(FileStore filestore, PathUtils.IOToLongFunction getSpace)
{
return tryGetSpace(filestore, getSpace, ignore -> {});
}
public static long tryGetSpace(FileStore filestore, PathUtils.IOToLongFunction getSpace, Consumer orElse)
{
try
{
return handleLargeFileSystem(getSpace.apply(filestore));
}
catch (IOException e)
{
orElse.accept(e);
return 0L;
}
}
/**
* Private constructor as the class contains only static methods.
*/
private FileStoreUtils()
{
}
/**
* Handle large file system by returning {@code Long.MAX_VALUE} when the size overflows.
* @param size returned by the Java's FileStore methods
* @return the size or {@code Long.MAX_VALUE} if the size was bigger than {@code Long.MAX_VALUE}
*/
private static long handleLargeFileSystem(long size)
{
return size < 0 ? Long.MAX_VALUE : size;
}
}