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    1   /*
    2    * Licensed to the Apache Software Foundation (ASF) under one or more
    3    * contributor license agreements.  See the NOTICE file distributed with
    4    * this work for additional information regarding copyright ownership.
    5    * The ASF licenses this file to You under the Apache License, Version 2.0
    6    * (the "License"); you may not use this file except in compliance with
    7    * the License.  You may obtain a copy of the License at
    8    *
    9    *     http://www.apache.org/licenses/LICENSE-2.0
    10   *
    11   * Unless required by applicable law or agreed to in writing, software
    12   * distributed under the License is distributed on an "AS IS" BASIS,
    13   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    14   * See the License for the specific language governing permissions and
    15   * limitations under the License.
    16   */
    17
    18  package org.apache.logging.log4j.io;
    19
    20  import java.io.FilterInputStream;
    21  import java.io.IOException;
    22  import java.io.InputStream;
    23  import java.nio.charset.Charset;
    24
    25  import org.apache.logging.log4j.Level;
    26  import org.apache.logging.log4j.Marker;
    27  import org.apache.logging.log4j.spi.ExtendedLogger;
    28
    29  /**
    30   * Logs each line read to a pre-defined level. Can also be configured with a Marker.
    31   *
    32   * @since 2.1
    33   */
    34  public class LoggerInputStream extends FilterInputStream {
    35      private static final String FQCN = LoggerInputStream.class.getName();
    36
    37      private final String fqcn;
    38      private final ByteStreamLogger logger;
    39
    40      protected LoggerInputStream(final InputStream in, final Charset charset, final ExtendedLogger logger,
    41                                  final String fqcn, final Level level, final Marker marker) {
    42          super(in);
    43          this.logger = new ByteStreamLogger(logger, level, marker, charset);
    44          this.fqcn = fqcn == null ? FQCN : fqcn;
    45      }
    46
    47      @Override
    48      public void close() throws IOException {
    49          this.logger.close(this.fqcn);
    50          super.close();
    51      }
    52
    53      @Override
    54      public int read() throws IOException {
    55          final int b = super.read();
    56          this.logger.put(this.fqcn, b);
    57          return b;
    58      }
    59
    60      @Override
    61      public int read(final byte[] b) throws IOException {
    62          return read(b, 0, b.length);
    63      }
    64
    65      @Override
    66      public int read(final byte[] b, final int off, final int len) throws IOException {
    67          final int bytesRead = super.read(b, off, len);
    68          this.logger.put(this.fqcn, b, off, bytesRead);
    69          return bytesRead;
    70      }
    71
    72      @Override
    73      public String toString() {
    74          return LoggerInputStream.class.getSimpleName() + "{stream=" + this.in + '}';
    75      }
    76  }