com.gilt.lucene.LuceneIndexPathProvider.scala Maven / Gradle / Ivy

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package com.gilt.lucene

import java.io.File
import javax.annotation.Nonnull

/**
 * Base trait that provides a path to an FSLuceneDirectory
 */
trait LuceneIndexPathProvider {
  /**
   * Provides the index directory path to the function f
   */
  protected def withIndexPath[T](f: (File) => T): T
}

/**
 * A LuceneIndexPathProvider that provides a directory path that is the
 * `index` sub-folder relative to the root of the service.
 * The sub-folder is created if it doesn't exist already.
 */
trait ServiceRootLucenePathProvider extends LuceneIndexPathProvider {
  private lazy val INDEX_DIRECTORY = "index"
  private lazy val serviceRootPath = System.getProperty("user.dir")
  private lazy val indexPath = new File(serviceRootPath, INDEX_DIRECTORY).getAbsolutePath

  @Nonnull
  protected def withIndexPath[T](@Nonnull f: (File) => T): T = {
    val indexFilePath = new File(indexPath)
    indexFilePath.mkdirs() // make sure path exist
    f(indexFilePath)
  }

}