com.stratio.cassandra.lucene.IndexWriterSkinny.scala Maven / Gradle / Ivy

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Cassandra Lucene Index plugin
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/*
 * Copyright (C) 2014 Stratio (http://stratio.com)
 *
 * 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 com.stratio.cassandra.lucene

import org.apache.cassandra.db.rows.Row
import org.apache.cassandra.db.{DecoratedKey, RangeTombstone, SinglePartitionReadCommand}
import org.apache.cassandra.index.transactions.IndexTransaction
import org.apache.cassandra.index.transactions.IndexTransaction.Type.COMPACTION
import org.apache.cassandra.utils.concurrent.OpOrder

/** [[IndexWriter]] for skinny rows.
  *
  * @param service         the service to perform the indexing operation
  * @param key             key of the partition being modified
  * @param nowInSec        current time of the update operation
  * @param opGroup         operation group spanning the update operation
  * @param transactionType what kind of update is being performed on the base data
  * @author Andres de la Pena `[email protected]`
  */
class IndexWriterSkinny(
    service: IndexServiceSkinny,
    key: DecoratedKey,
    nowInSec: Int,
    opGroup: OpOrder.Group,
    transactionType: IndexTransaction.Type)
  extends IndexWriter(service, key, nowInSec, opGroup, transactionType) {

  private var row: Option[Row] = None

  /** @inheritdoc */
  override def delete() {
    service.delete(key)
    row = None
  }

  /** @inheritdoc */
  override def delete(tombstone: RangeTombstone): Unit = {
    logger.warn(s"Ignoring range tombstone $tombstone in skinny table")
  }

  /** @inheritdoc */
  override def index(row: Row) {
    this.row = Option(row)
  }

  /** @inheritdoc */
  override def commit() {
    row.map(
      row => {
        if (transactionType == COMPACTION || service.needsReadBeforeWrite(key, row)) {
          tracer.trace("Lucene index reading before write")
          val command = SinglePartitionReadCommand.fullPartitionRead(metadata, nowInSec, key)
          val readRows = read(command)
          if (readRows.hasNext) readRows.next else row
        } else row
      }).foreach(
      row => {
        if (row.hasLiveData(nowInSec, metadata.enforceStrictLiveness )) {
          tracer.trace("Lucene index writing document")
          service.upsert(key, row, nowInSec)
        } else {
          tracer.trace("Lucene index deleting document")
          service.delete(key)
        }
      })
  }
}