com.github.klieber.phantomjs.exec.PhantomJsExecutor Maven / Gradle / Ivy

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A plugin for downloading, installing, and executing phantomjs.

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/*
 * Copyright (c) 2014 Kyle Lieber
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy of
 * this software and associated documentation files (the "Software"), to deal in
 * the Software without restriction, including without limitation the rights to
 * use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of
 * the Software, and to permit persons to whom the Software is furnished to do so,
 * subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in all
 * copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
 * FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
 * COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
 * IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
 */
package com.github.klieber.phantomjs.exec;

import java.io.InputStream;
import java.io.PrintStream;
import java.util.Scanner;

public class PhantomJsExecutor {

  private static final String UNABLE_TO_EXECUTE = "Unable to execute phantomjs process";

  private PhantomJsProcessBuilder runner;

  public PhantomJsExecutor(PhantomJsProcessBuilder runner) {
    this.runner = runner;
  }

  public int execute(PhantomJsOptions options) throws ExecutionException {
    try {
      Process process = this.runner.start(options);
      inheritIO(process.getInputStream(), System.out);
      inheritIO(process.getErrorStream(), System.err);
      return process.waitFor();
    } catch (InterruptedException e) {
      throw new ExecutionException(UNABLE_TO_EXECUTE, e);
    }
  }


  private static void inheritIO(final InputStream src, final PrintStream dest) {
    new Thread(
        new Runnable() {
          public void run() {
            Scanner sc = new Scanner(src);
            while (sc.hasNextLine()) {
              dest.println(sc.nextLine());
            }
          }
        }
    ).start();
  }
}