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FreeCommand.java
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FreeCommand.java
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/*
* The Alluxio Open Foundation licenses this work under the Apache License, version 2.0
* (the "License"). You may not use this work except in compliance with the License, which is
* available at www.apache.org/licenses/LICENSE-2.0
*
* This software is distributed on an "AS IS" basis, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND,
* either express or implied, as more fully set forth in the License.
*
* See the NOTICE file distributed with this work for information regarding copyright ownership.
*/
package alluxio.cli.fs.command;
import alluxio.AlluxioURI;
import alluxio.cli.CommandUtils;
import alluxio.client.file.FileSystem;
import alluxio.client.file.options.FreeOptions;
import alluxio.exception.AlluxioException;
import alluxio.exception.status.InvalidArgumentException;
import org.apache.commons.cli.CommandLine;
import org.apache.commons.cli.Option;
import org.apache.commons.cli.Options;
import java.io.IOException;
import javax.annotation.concurrent.ThreadSafe;
/**
* Frees the given file or folder from Alluxio storage (recursively freeing all children if a
* folder).
*/
@ThreadSafe
public final class FreeCommand extends AbstractFileSystemCommand {
private static final Option FORCE_OPTION =
Option.builder("f")
.required(false)
.hasArg(false)
.desc("force to free files even pinned")
.build();
/**
* Constructs a new instance to free the given file or folder from Alluxio.
*
* @param fs the filesystem of Alluxio
*/
public FreeCommand(FileSystem fs) {
super(fs);
}
@Override
public Options getOptions() {
return new Options().addOption(FORCE_OPTION);
}
@Override
public String getCommandName() {
return "free";
}
@Override
protected void runPlainPath(AlluxioURI path, CommandLine cl)
throws AlluxioException, IOException {
FreeOptions options = FreeOptions.defaults().setRecursive(true).setForced(cl.hasOption("f"));
mFileSystem.free(path, options);
System.out.println(path + " was successfully freed from memory.");
}
@Override
public String getUsage() {
return "free [-f] <path>";
}
@Override
public String getDescription() {
return "Frees the space occupied by a file or a directory in Alluxio."
+ " Specify -f to force freeing pinned files in the directory.";
}
@Override
public int run(CommandLine cl) throws AlluxioException, IOException {
String[] args = cl.getArgs();
AlluxioURI path = new AlluxioURI(args[0]);
runWildCardCmd(path, cl);
return 0;
}
@Override
public void validateArgs(CommandLine cl) throws InvalidArgumentException {
CommandUtils.checkNumOfArgsNoLessThan(this, cl, 1);
}
}