hbase-ruby.shell.commands.merge_region.rb Maven / Gradle / Ivy

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#
#
# 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
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# 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.
#

module Shell
  module Commands
    class MergeRegion < Command
      def help
        return <<-EOF
Merge two regions. Passing 'true' as the optional third parameter will force
a merge ('force' merges regardless else merge will fail unless passed
adjacent regions. 'force' is for expert use only).

NOTE: You must pass the encoded region name, not the full region name so
this command is a little different from other region operations.  The encoded
region name is the hash suffix on region names: e.g. if the region name were
TestTable,0094429456,1289497600452.527db22f95c8a9e0116f0cc13c680396. then
the encoded region name portion is 527db22f95c8a9e0116f0cc13c680396

Examples:

  hbase> merge_region 'ENCODED_REGIONNAME', 'ENCODED_REGIONNAME'
  hbase> merge_region 'ENCODED_REGIONNAME', 'ENCODED_REGIONNAME', true
EOF
      end

      def command(encoded_region_a_name, encoded_region_b_name, force = 'false')
        format_simple_command do
          admin.merge_region(encoded_region_a_name, encoded_region_b_name, force)
        end
      end
    end
  end
end