content: /*
   * 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.chemistry.opencmis.workbench;
  
  import java.io.IOException;
  import java.io.InputStream;
  import java.text.NumberFormat;
  
  import org.slf4j.Logger;
  import org.slf4j.LoggerFactory;
  
  public class LoggingInputStream extends InputStream {
  
      private static final Logger LOG = LoggerFactory.getLogger(LoggingInputStream.class);
  
      private final InputStream stream;
      private final String desc;
      private long marked;
      private long count = 0;
      private long startTimestamp = -1;
      private long endTimestamp = -1;
  
      public LoggingInputStream(InputStream stream, String desc) {
          super();
          this.stream = stream;
          this.desc = desc;
      }
  
      @Override
      public int available() throws IOException {
          return stream.available();
      }
  
      @Override
      public synchronized void mark(int readlimit) {
          stream.mark(readlimit);
          marked = count;
  
          if (LOG.isTraceEnabled()) {
              LOG.trace("{}: mark", desc);
          }
      }
  
      @Override
      public boolean markSupported() {
          return stream.markSupported();
      }
  
      @Override
      public synchronized void reset() throws IOException {
          stream.reset();
          count = marked;
  
          if (LOG.isTraceEnabled()) {
              LOG.trace("{}: reset", desc);
          }
      }
  
      protected void count(long len) {
          if (startTimestamp < 0) {
              startTimestamp = System.currentTimeMillis();
              LOG.info("{}: started streaming", desc);
          }
          if (len == -1 && endTimestamp == -1) {
              endTimestamp = System.currentTimeMillis();
              long time = (endTimestamp - startTimestamp);
              long kibPerSec = (time < 1 ? -1L : (long) (((double) count / 1024) / ((double) time / 1000)));
  
              NumberFormat nf = NumberFormat.getInstance();
              LOG.info("{}: streamed {} bytes in {} ms, {} KiB/sec", desc, nf.format(count), nf.format(time),
                      nf.format(kibPerSec));
          } else {
              count += len;
          }
      }
  
      @Override
      public int read() throws IOException {
          int b = stream.read();
          count(b == -1 ? -1 : 1);
  
          if (b != -1 && LOG.isTraceEnabled()) {
              LOG.trace("{}: read {} bytes", desc, count);
          }
  
          return b;
      }
  
      @Override
      public int read(byte[] b, int off, int len) throws IOException {
          int rb = stream.read(b, off, len);
          count(rb);
  
          if (rb != -1 && LOG.isTraceEnabled()) {
              LOG.trace("{}: read {} bytes", desc, count);
          }
  
          return rb;
      }
  
      @Override
      public int read(byte[] b) throws IOException {
          int rb = stream.read(b);
          count(rb);
  
          if (rb != -1 && LOG.isTraceEnabled()) {
              LOG.trace("{}: read {} bytes", desc, count);
          }
  
          return rb;
      }
  
      @Override
      public long skip(long n) throws IOException {
          long len = super.skip(n);
          count(len);
  
          if (len > 0 && LOG.isTraceEnabled()) {
              LOG.trace("{}: read {} bytes", desc, count);
          }
  
          return len;
      }
  
      @Override
      public void close() throws IOException {
          super.close();
  
          if (LOG.isDebugEnabled()) {
              LOG.info("{}: stream closed", desc);
          }
      }
  }
  