content: package net.sf.expectit.ant;
  
  /*
   * #%L
   * ExpectIt
   * %%
   * Copyright (C) 2014 Alexey Gavrilov and contributors
   * %%
   * 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.
   * #L%
   */
  
  import java.io.IOException;
  import java.io.InputStream;
  import java.io.OutputStream;
  import java.util.concurrent.Executors;
  import java.util.concurrent.ScheduledExecutorService;
  import java.util.concurrent.TimeUnit;
  import org.apache.sshd.common.Factory;
  import org.apache.sshd.server.Command;
  import org.apache.sshd.server.Environment;
  import org.apache.sshd.server.ExitCallback;
  
  /**
   * An echo command which pipes the input to the output.
   */
  class SshEchoCommandFactory implements Factory<Command>, Runnable {
      private ScheduledExecutorService executor = Executors.newScheduledThreadPool(1);
      private OutputStream out;
      private InputStream in;
  
      @Override
      public void run() {
          byte[] buffer = new byte[4096];
          try {
              int len = in.read(buffer);
              if (len > 0) {
                  out.write(buffer, 0, len);
                  out.flush();
              }
          } catch (IOException e) {
              e.printStackTrace();
          }
      }
  
      @Override
      public Command create() {
          return new Command() {
              @Override
              public void setInputStream(InputStream in) {
                  SshEchoCommandFactory.this.in = in;
              }
  
              @Override
              public void setOutputStream(OutputStream out) {
                  SshEchoCommandFactory.this.out = out;
              }
  
              @Override
              public void setErrorStream(OutputStream err) {
  
              }
  
              @Override
              public void setExitCallback(ExitCallback callback) {
  
              }
  
              @Override
              public void start(Environment env) throws IOException {
                  executor.scheduleWithFixedDelay(
                          SshEchoCommandFactory.this,
                          0,
                          100,
                          TimeUnit.MILLISECONDS);
              }
  
              @Override
              public void destroy() {
                  executor.shutdownNow();
              }
          };
      }
  }
  