play.data.parsing.TempFilePlugin Maven / Gradle / Ivy

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RePlay is a fork of the Play1 framework, created by Codeborne.

There is a newer version: 2.6.2

package play.data.parsing;

import static org.apache.commons.lang3.StringUtils.leftPad;

import java.io.File;
import java.io.IOException;
import java.util.concurrent.atomic.AtomicLong;
import org.apache.commons.io.FileUtils;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import play.Play;
import play.PlayPlugin;

/** Creates temporary folders for file parsing, and deletes it after request completion. */
public class TempFilePlugin extends PlayPlugin {
  private static final Logger log = LoggerFactory.getLogger(TempFilePlugin.class);
  private static final AtomicLong count = new AtomicLong();

  public static final ThreadLocal tempFolder = new ThreadLocal<>();

  public static File createTempFolder() {
    if (Play.tmpDir == null) {
      throw new IllegalStateException("Cannot create temp folder: Play.tmpDir is null");
    }
    if (tempFolder.get() == null) {
      File file =
          new File(
              new File(Play.tmpDir, "uploads"),
              System.currentTimeMillis()
                  + "_"
                  + leftPad(String.valueOf(count.getAndIncrement()), 10, '0'));
      if (!file.exists() && !file.mkdirs()) {
        log.error("Failed to create directory {}", file);
      }
      tempFolder.set(file);
    }
    return tempFolder.get();
  }

  @Override
  public void onInvocationSuccess() {
    File file = tempFolder.get();
    if (file != null) {
      tempFolder.remove();
      try {
        FileUtils.deleteDirectory(file);
      } catch (IOException e) {
        log.error("Failed to delete directory {}", file, e);
      }
    }
  }
}