com.johnsnowlabs.storage.StorageWriter.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, WriteOptions}
trait StorageWriter[A] extends HasConnection {
protected def writeBufferSize: Int
def toBytes(content: A): Array[Byte]
def add(word: String, content: A): Unit
protected def put(batch: WriteBatch, word: String, content: A): Unit = {
batch.put(word.trim.getBytes, toBytes(content))
}
protected def merge(batch: WriteBatch, word: String, content: A): Unit = {
batch.merge(word.trim.getBytes, toBytes(content))
}
def flush(batch: WriteBatch): Unit = {
val writeOptions = new WriteOptions()
/** Might have disconnected already */
if (connection.isConnected) {
connection.getDb.write(writeOptions, batch)
}
batch.close()
}
def close(): Unit
}