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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.FilterReader;
    21  import java.io.IOException;
    22  import java.io.Reader;
    23  import java.nio.CharBuffer;
    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 LoggerReader extends FilterReader {
    35      private static final String FQCN = LoggerReader.class.getName();
    36
    37      private final CharStreamLogger logger;
    38      private final String fqcn;
    39
    40      protected LoggerReader(final Reader reader, final ExtendedLogger logger, final String fqcn, final Level level,
    41                             final Marker marker) {
    42          super(reader);
    43          this.logger = new CharStreamLogger(logger, level, marker);
    44          this.fqcn = fqcn == null ? FQCN : fqcn;
    45      }
    46
    47      @Override
    48      public void close() throws IOException {
    49          super.close();
    50          this.logger.close(this.fqcn);
    51      }
    52
    53      @Override
    54      public int read() throws IOException {
    55          final int c = super.read();
    56          this.logger.put(this.fqcn, c);
    57          return c;
    58      }
    59
    60      @Override
    61      public int read(final char[] cbuf) throws IOException {
    62          return read(cbuf, 0, cbuf.length);
    63      }
    64
    65      @Override
    66      public int read(final char[] cbuf, final int off, final int len) throws IOException {
    67          final int charsRead = super.read(cbuf, off, len);
    68          this.logger.put(this.fqcn, cbuf, off, charsRead);
    69          return charsRead;
    70      }
    71
    72      @Override
    73      public int read(final CharBuffer target) throws IOException {
    74          final int len = target.remaining();
    75          final char[] cbuf = new char[len];
    76          final int charsRead = read(cbuf, 0, len);
    77          if (charsRead > 0) {
    78              target.put(cbuf, 0, charsRead);
    79          }
    80          return charsRead;
    81      }
    82
    83      @Override
    84      public String toString() {
    85          return LoggerReader.class.getSimpleName() + "{stream=" + this.in + '}';
    86      }
    87  }