001/**
002 *
003 * Licensed to the Apache Software Foundation (ASF) under one
004 * or more contributor license agreements.  See the NOTICE file
005 * distributed with this work for additional information
006 * regarding copyright ownership.  The ASF licenses this file
007 * to you under the Apache License, Version 2.0 (the
008 * "License"); you may not use this file except in compliance
009 * with the License.  You may obtain a copy of the License at
010 *
011 *     http://www.apache.org/licenses/LICENSE-2.0
012 *
013 * Unless required by applicable law or agreed to in writing, software
014 * distributed under the License is distributed on an "AS IS" BASIS,
015 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
016 * See the License for the specific language governing permissions and
017 * limitations under the License.
018 */
019package org.apache.hadoop.hbase.snapshot;
020
021import org.apache.hadoop.hbase.TableName;
022import org.apache.hadoop.hbase.util.Bytes;
023import org.apache.yetus.audience.InterfaceAudience;
024
025import org.apache.hadoop.hbase.shaded.protobuf.generated.SnapshotProtos;
026
027/**
028 * Class to help with dealing with a snapshot description on the client side.
029 * There is a corresponding class on the server side.
030 */
031@InterfaceAudience.Private
032public final class ClientSnapshotDescriptionUtils {
033  private ClientSnapshotDescriptionUtils() {
034  }
035
036  /**
037   * Check to make sure that the description of the snapshot requested is valid
038   * @param snapshot description of the snapshot
039   * @throws IllegalArgumentException if the name of the snapshot or the name of the table to
040   *           snapshot are not valid names
041   */
042  public static void assertSnapshotRequestIsValid(SnapshotProtos.SnapshotDescription snapshot)
043      throws IllegalArgumentException {
044    // make sure the snapshot name is valid
045    TableName.isLegalTableQualifierName(Bytes.toBytes(snapshot.getName()), true);
046    if (snapshot.hasTable()) {
047      // make sure the table name is valid, this will implicitly check validity
048      TableName tableName = TableName.valueOf(snapshot.getTable());
049
050      if (tableName.isSystemTable()) {
051        throw new IllegalArgumentException("System table snapshots are not allowed");
052      }
053    }
054  }
055
056  /**
057   * Returns a single line (no \n) representation of snapshot metadata. Use this instead of
058   * {@link org.apache.hadoop.hbase.protobuf.generated.HBaseProtos.SnapshotDescription#toString()}.
059   * We don't replace
060   * {@link org.apache.hadoop.hbase.protobuf.generated.HBaseProtos.SnapshotDescription}'s
061   * {@code toString}, because it is auto-generated by protoc.
062   *
063   * @param snapshot description of the snapshot
064   * @return single line string with a summary of the snapshot parameters
065   */
066  public static String toString(SnapshotProtos.SnapshotDescription snapshot) {
067    if (snapshot == null) {
068      return null;
069    }
070
071    return new StringBuilder("{ ss=")
072            .append(snapshot.getName())
073            .append(" table=")
074            .append(snapshot.hasTable() ? TableName.valueOf(snapshot.getTable()) : "")
075            .append(" type=")
076            .append(snapshot.getType())
077            .append(" ttl=")
078            .append(snapshot.getTtl())
079            .append(" }")
080            .toString();
081  }
082}