/*
* 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.shell.command;
import alluxio.AlluxioURI;
import alluxio.client.file.FileSystem;
import alluxio.exception.AlluxioException;
import org.apache.commons.cli.CommandLine;
import java.io.IOException;
import javax.annotation.concurrent.ThreadSafe;
/**
* Pins the given file or folder (recursively pinning all children if a folder). Pinned files are
* never evicted from memory.
*/
@ThreadSafe
public final class PinCommand extends WithWildCardPathCommand {
/**
* @param fs the filesystem of Alluxio
*/
public PinCommand(FileSystem fs) {
super(fs);
}
@Override
public String getCommandName() {
return "pin";
}
@Override
protected void runCommand(AlluxioURI path, CommandLine cl) throws AlluxioException, IOException {
CommandUtils.setPinned(mFileSystem, path, true);
System.out.println("File '" + path + "' was successfully pinned.");
}
@Override
public String getUsage() {
return "pin <path>";
}
@Override
public String getDescription() {
return "Pins the given file or directory in memory (works recursively for directories). "
+ "Pinned files are never evicted from memory, unless TTL is set.";
}
}