com.johnsnowlabs.storage.StorageBatchWriter.scala Maven / Gradle / Ivy
/*
* Copyright 2017-2022 John Snow Labs
*
* 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.johnsnowlabs.storage
import org.rocksdb.WriteBatch
trait StorageBatchWriter[A] extends StorageWriter[A] {
private var localBatch = new WriteBatch()
private var batchSize = 0
def add(word: String, content: A): Unit = {
/** calling .trim because we always trim in reader */
put(localBatch, word, content)
batchSize += 1
if (batchSize >= writeBufferSize)
flush(localBatch)
}
def merge(word: String, content: A): Unit = {
merge(localBatch, word, content)
}
override def flush(batch: WriteBatch): Unit = {
super.flush(batch)
localBatch = new WriteBatch()
batchSize = 0
}
override def close(): Unit = {
if (batchSize > 0)
flush(localBatch)
super.close()
}
}