geode-core/src/main/java/org/apache/geode/internal/process/BlockingProcessStreamReader.java

/*
 * 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.internal.process;

import static org.apache.commons.lang3.SystemUtils.LINE_SEPARATOR;

import java.io.BufferedReader;
import java.io.InputStreamReader;
import java.io.UncheckedIOException;

import org.apache.logging.log4j.Logger;

import org.apache.geode.internal.logging.LogService;

/**
 * Reads the output stream of a Process. Default implementation performs blocking per-line reading
 * of the InputStream.
 *
 * Extracted from ProcessStreamReader.
 *
 * @since GemFire 8.2
 */
public class BlockingProcessStreamReader extends ProcessStreamReader {
  private static final Logger logger = LogService.getLogger();

  protected BlockingProcessStreamReader(final Builder builder) {
    super(builder);
  }

  @Override
  public void run() {
    try {
      new BufferedReader(new InputStreamReader(inputStream)).lines()
          .map(line -> line + LINE_SEPARATOR).forEach(this.inputListener::notifyInputLine);
    } catch (UncheckedIOException e) {
      logger.debug(e);
    }
  }
}