core/src/main/java/org/apache/accumulo/core/clientImpl/TabletServerBatchDeleter.java

/*
 * 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
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package org.apache.accumulo.core.clientImpl;

import java.util.Iterator;
import java.util.Map.Entry;

import org.apache.accumulo.core.client.BatchDeleter;
import org.apache.accumulo.core.client.BatchWriter;
import org.apache.accumulo.core.client.BatchWriterConfig;
import org.apache.accumulo.core.client.IteratorSetting;
import org.apache.accumulo.core.client.MutationsRejectedException;
import org.apache.accumulo.core.data.Key;
import org.apache.accumulo.core.data.Mutation;
import org.apache.accumulo.core.data.TableId;
import org.apache.accumulo.core.data.Value;
import org.apache.accumulo.core.iterators.SortedKeyIterator;
import org.apache.accumulo.core.security.Authorizations;
import org.apache.accumulo.core.security.ColumnVisibility;

public class TabletServerBatchDeleter extends TabletServerBatchReader implements BatchDeleter {

  private final ClientContext context;
  private TableId tableId;
  private BatchWriterConfig bwConfig;

  public TabletServerBatchDeleter(ClientContext context, TableId tableId,
      Authorizations authorizations, int numQueryThreads, BatchWriterConfig bwConfig) {
    super(context, BatchDeleter.class, tableId, authorizations, numQueryThreads);
    this.context = context;
    this.tableId = tableId;
    this.bwConfig = bwConfig;
    super.addScanIterator(new IteratorSetting(Integer.MAX_VALUE,
        BatchDeleter.class.getName().replaceAll("[.]", "_") + "_NOVALUE", SortedKeyIterator.class));
  }

  @Override
  public void delete() throws MutationsRejectedException {
    try (BatchWriter bw = new BatchWriterImpl(context, tableId, bwConfig)) {
      Iterator<Entry<Key,Value>> iter = super.iterator();
      while (iter.hasNext()) {
        Entry<Key,Value> next = iter.next();
        Key k = next.getKey();
        Mutation m = new Mutation(k.getRow());
        m.putDelete(k.getColumnFamily(), k.getColumnQualifier(),
            new ColumnVisibility(k.getColumnVisibility()), k.getTimestamp());
        bw.addMutation(m);
      }
    }
  }

}