jetbrains.exodus.io.FileDataReaderWriterProvider.kt Maven / Gradle / Ivy

Go to download

Show more of this group Show more artifacts with this name
Show all versions of sonarlint-core Show documentation

Common library used by some SonarLint flavors

There is a newer version: 10.5.0.78949

/**
 * Copyright 2010 - 2022 JetBrains s.r.o.
 *
 * 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
 *
 * https://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 jetbrains.exodus.io

import jetbrains.exodus.ExodusException
import jetbrains.exodus.core.dataStructures.Pair
import jetbrains.exodus.env.Environment
import jetbrains.exodus.env.EnvironmentImpl
import java.io.File

open class FileDataReaderWriterProvider : DataReaderWriterProvider() {

    protected var env: EnvironmentImpl? = null

    override fun newReaderWriter(location: String): Pair {
        val reader = newFileDataReader(location)
        return Pair(reader, newFileDataWriter(location, reader))
    }

    override fun onEnvironmentCreated(environment: Environment) {
        super.onEnvironmentCreated(environment)
        this.env = environment as EnvironmentImpl
    }

    protected open fun newFileDataReader(location: String): DataReader {
        val ec = env?.environmentConfig
        return FileDataReader(checkDirectory(location)).apply {
            if (ec != null && ec.logCacheUseNio) {
                useNio(ec.logCacheFreePhysicalMemoryThreshold)
            }
        }
    }

    protected open fun newFileDataWriter(location: String, reader: DataReader) =
            FileDataWriter(reader as FileDataReader, env?.environmentConfig?.logLockId)

    companion object {

        @JvmStatic
        protected fun checkDirectory(location: String): File {
            val directory = File(location)
            if (directory.isFile) {
                throw ExodusException("A directory is required: $directory")
            }
            if (!directory.exists() && !directory.mkdirs()) {
                throw ExodusException("Failed to create directory: $directory")
            }
            return directory
        }
    }
}