alluxio.cli.fs.command.DeleteLineageCommand.java Source code

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Here is the source code for alluxio.cli.fs.command.DeleteLineageCommand.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.cli.CommandUtils;
import alluxio.client.file.FileSystem;
import alluxio.client.lineage.AlluxioLineage;
import alluxio.client.lineage.LineageContext;
import alluxio.client.lineage.options.DeleteLineageOptions;
import alluxio.exception.AlluxioException;
import alluxio.exception.status.InvalidArgumentException;

import org.apache.commons.cli.CommandLine;

import java.io.IOException;

import javax.annotation.concurrent.ThreadSafe;

/**
 * Deletes a lineage by its id. If the cascade flag is set to true it performs a cascading delete.
 */
@ThreadSafe
public final class DeleteLineageCommand extends AbstractFileSystemCommand {

    /**
     * @param fs the filesystem of Alluxio
     */
    public DeleteLineageCommand(FileSystem fs) {
        super(fs);
    }

    @Override
    public String getCommandName() {
        return "deleteLineage";
    }

    @Override
    public void validateArgs(CommandLine cl) throws InvalidArgumentException {
        CommandUtils.checkNumOfArgsEquals(this, cl, 2);
    }

    @Override
    public int run(CommandLine cl) throws AlluxioException, IOException {
        String[] args = cl.getArgs();
        AlluxioLineage tl = AlluxioLineage.get(LineageContext.INSTANCE);
        long lineageId = Long.parseLong(args[0]);
        boolean cascade = Boolean.parseBoolean(args[1]);
        DeleteLineageOptions options = DeleteLineageOptions.defaults().setCascade(cascade);
        tl.deleteLineage(lineageId, options);
        System.out.println("Lineage " + lineageId + " has been deleted.");
        return 0;
    }

    @Override
    public String getUsage() {
        return "deleteLineage <lineageId> <cascade(true|false)>";
    }

    @Override
    public String getDescription() {
        return "Deletes a lineage. If cascade is specified as true, " + "dependent lineages will also be deleted.";
    }
}