/**
* 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.hadoop.hbase.snapshot;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.apache.hadoop.classification.InterfaceAudience;
import org.apache.hadoop.classification.InterfaceStability;
import org.apache.hadoop.fs.FileSystem;
import org.apache.hadoop.fs.Path;
import org.apache.hadoop.hbase.HTableDescriptor;
import org.apache.hadoop.hbase.TableName;
import org.apache.hadoop.hbase.errorhandling.ForeignExceptionDispatcher;
import org.apache.hadoop.hbase.protobuf.ProtobufUtil;
import org.apache.hadoop.hbase.protobuf.generated.HBaseProtos.SnapshotDescription;
import org.apache.hadoop.hbase.util.FSTableDescriptors;
/**
* Copy the table info into the snapshot directory
*/
@InterfaceAudience.Private
@InterfaceStability.Evolving
public class TableInfoCopyTask extends SnapshotTask {
public static final Log LOG = LogFactory.getLog(TableInfoCopyTask.class);
private final FileSystem fs;
private final Path rootDir;
/**
* Copy the table info for the given table into the snapshot
* @param monitor listen for errors while running the snapshot
* @param snapshot snapshot for which we are copying the table info
* @param fs {@link FileSystem} where the tableinfo is stored (and where the copy will be written)
* @param rootDir root of the {@link FileSystem} where the tableinfo is stored
*/
public TableInfoCopyTask(ForeignExceptionDispatcher monitor,
SnapshotDescription snapshot, FileSystem fs, Path rootDir) {
super(snapshot, monitor);
this.rootDir = rootDir;
this.fs = fs;
}
@Override
public Void call() throws Exception {
LOG.debug("Running table info copy.");
this.rethrowException();
LOG.debug("Attempting to copy table info for snapshot:"
+ ClientSnapshotDescriptionUtils.toString(this.snapshot));
// get the HTable descriptor
HTableDescriptor orig = FSTableDescriptors.getTableDescriptorFromFs(fs, rootDir,
TableName.valueOf(this.snapshot.getTable()));
this.rethrowException();
// write a copy of descriptor to the snapshot directory
Path snapshotDir = SnapshotDescriptionUtils.getWorkingSnapshotDir(snapshot, rootDir);
new FSTableDescriptors(fs, rootDir)
.createTableDescriptorForTableDirectory(snapshotDir, orig, false);
LOG.debug("Finished copying tableinfo.");
return null;
}
}