content: /*
   * Copyright (C) 2010-2101 Alibaba Group Holding Limited.
   *
   * Licensed 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 com.alibaba.otter.shared.common.utils.cmd;
  
  import java.io.BufferedReader;
  import java.io.BufferedWriter;
  import java.io.IOException;
  import java.io.InputStream;
  import java.io.InputStreamReader;
  import java.io.OutputStream;
  import java.io.OutputStreamWriter;
  import java.io.PrintWriter;
  
  import org.apache.commons.io.IOUtils;
  
  public class StreamAppender {
  
      private Thread      errWriter;
      private Thread      outWriter;
      private PrintWriter output;
  
      public StreamAppender(OutputStream output){
          this.output = new PrintWriter(new BufferedWriter(new OutputStreamWriter(output)));
      }
  
      public void writeInput(final InputStream err, final InputStream out) {
          errWriter = new Thread() {
  
              BufferedReader reader = new BufferedReader(new InputStreamReader(err));
  
              public void run() {
                  try {
                      String line = null;
                      while ((line = reader.readLine()) != null) {
                          output.println(line);
                      }
                  } catch (IOException e) {
                      //ignore
                  } finally {
                      output.flush();// 关闭之前flush一下
                      IOUtils.closeQuietly(reader);
                  }
              }
          };
          outWriter = new Thread() {
  
              BufferedReader reader = new BufferedReader(new InputStreamReader(out));
  
              public void run() {
                  try {
                      String line = null;
                      while ((line = reader.readLine()) != null) {
                          output.println(line);
                      }
                  } catch (IOException e) {
                      //ignore
                  } finally {
                      output.flush();// 关闭之前flush一下
                      IOUtils.closeQuietly(reader);
                  }
              }
          };
          errWriter.setDaemon(true);
          outWriter.setDaemon(true);
          errWriter.start();
          outWriter.start();
      }
  
      public void finish() throws Exception {
          outWriter.join();
          errWriter.join();
      }
  }
  