SSTableWriter.java

/*
 * Copyright 2015 Edward Capriolo
 *
 * Licensed 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 io.teknek.nibiru.engine;

import io.teknek.nibiru.Store;
import io.teknek.nibiru.Token;
import io.teknek.nibiru.engine.atom.AtomKey;
import io.teknek.nibiru.engine.atom.AtomValue;

import java.io.IOException;
import java.util.Iterator;
import java.util.Map;
import java.util.Map.Entry;
import java.util.SortedMap;
import java.util.TreeMap;

public class SSTableWriter {

  public void flushToDisk(String id, Store columnFamily, AbstractMemtable m) throws IOException{
    SsTableStreamWriter w = new SsTableStreamWriter(id, columnFamily);
    w.open();
    /*
    for (Entry<Token, ConcurrentSkipListMap<AtomKey, AtomValue>> i : m.getData().entrySet()){
      w.write(i.getKey(), i.getValue());
    }*/
    Iterator<MemtablePair<Token, Map<AtomKey, Iterator<AtomValue>>>> i = m.getDataIterator();
    while (i.hasNext()){
      MemtablePair<Token, Map<AtomKey, Iterator<AtomValue>>> l = i.next();
      SortedMap<AtomKey,AtomValue> newMap = new TreeMap<AtomKey,AtomValue>();
      for (Entry<AtomKey, Iterator<AtomValue>> j : l.getRight().entrySet()){
        newMap.put(j.getKey(), VersionedMemtable.highest(j.getValue()));
      }
      w.write(l.getLeft(), newMap);
    }
    w.close();
  }
}