org.apache.cassandra.io.sstable.SnapshotDeletingTask 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.sstable;
import java.io.File;
import java.util.Queue;
import java.util.concurrent.ConcurrentLinkedQueue;
import com.google.common.annotations.VisibleForTesting;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.apache.cassandra.concurrent.ScheduledExecutors;
import org.apache.cassandra.db.WindowsFailedSnapshotTracker;
import org.apache.cassandra.io.FSWriteError;
import org.apache.cassandra.io.util.FileUtils;
public class SnapshotDeletingTask implements Runnable
{
private static final Logger logger = LoggerFactory.getLogger(SnapshotDeletingTask.class);
public final File path;
private static final Queue failedTasks = new ConcurrentLinkedQueue<>();
public static void addFailedSnapshot(File path)
{
logger.warn("Failed to delete snapshot [{}]. Will retry after further sstable deletions. Folder will be deleted on JVM shutdown or next node restart on crash.", path);
WindowsFailedSnapshotTracker.handleFailedSnapshot(path);
failedTasks.add(new SnapshotDeletingTask(path));
}
private SnapshotDeletingTask(File path)
{
this.path = path;
}
public void run()
{
try
{
FileUtils.deleteRecursive(path);
logger.info("Successfully deleted snapshot {}.", path);
}
catch (FSWriteError e)
{
failedTasks.add(this);
}
}
/**
* Retry all failed deletions.
*/
public static void rescheduleFailedTasks()
{
Runnable task;
while ( null != (task = failedTasks.poll()))
ScheduledExecutors.nonPeriodicTasks.submit(task);
}
@VisibleForTesting
public static int pendingDeletionCount()
{
return failedTasks.size();
}
}