/*
 * Licensed to the Apache Software Foundation (ASF) under one or more contributor license
 * agreements. See the NOTICE file distributed with this work for additional information regarding
 * copyright ownership. The ASF licenses this file to You 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 org.apache.geode.test.junit.rules.gfsh.internal;

import java.io.BufferedReader;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.UncheckedIOException;
import java.util.function.Consumer;

class StreamGobbler implements Runnable {
  private InputStream inputStream;
  private Consumer<String> consumeInputLine;

  public StreamGobbler(InputStream inputStream, Consumer<String> consumeInputLine) {
    this.inputStream = inputStream;
    this.consumeInputLine = consumeInputLine;
  }

  public void run() {
    try {
      new BufferedReader(new InputStreamReader(inputStream)).lines().forEach(consumeInputLine);
    } catch (UncheckedIOException ignored) {
      // If this gobbler is reading the System.out stream from a process that gets killed,
      // we will occasionally see an exception here than can be ignored.
    }
  }

  public void startInNewThread() {
    new Thread(this).start();
  }
}
