001    /*
002     * Licensed to the Apache Software Foundation (ASF) under one or more
003     * contributor license agreements.  See the NOTICE file distributed with
004     * this work for additional information regarding copyright ownership.
005     * The ASF licenses this file to You under the Apache License, Version 2.0
006     * (the "License"); you may not use this file except in compliance with
007     * the License.  You may obtain a copy of the License at
008     *
009     *     http://www.apache.org/licenses/LICENSE-2.0
010     *
011     * Unless required by applicable law or agreed to in writing, software
012     * distributed under the License is distributed on an "AS IS" BASIS,
013     * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
014     * See the License for the specific language governing permissions and
015     * limitations under the License.
016     */
017    
018    package org.apache.logging.log4j.io;
019    
020    import java.io.FilterInputStream;
021    import java.io.IOException;
022    import java.io.InputStream;
023    import java.nio.charset.Charset;
024    
025    import org.apache.logging.log4j.Level;
026    import org.apache.logging.log4j.Marker;
027    import org.apache.logging.log4j.spi.ExtendedLogger;
028    
029    /**
030     * Logs each line read to a pre-defined level. Can also be configured with a Marker.
031     * 
032     * @since 2.1
033     */
034    public class LoggerInputStream extends FilterInputStream {
035        private static final String FQCN = LoggerInputStream.class.getName();
036    
037        private final String fqcn;
038        private final ByteStreamLogger logger;
039    
040        protected LoggerInputStream(final InputStream in, final Charset charset, final ExtendedLogger logger,
041                                    final String fqcn, final Level level, final Marker marker) {
042            super(in);
043            this.logger = new ByteStreamLogger(logger, level, marker, charset);
044            this.fqcn = fqcn == null ? FQCN : fqcn;
045        }
046    
047        @Override
048        public void close() throws IOException {
049            this.logger.close(this.fqcn);
050            super.close();
051        }
052    
053        @Override
054        public int read() throws IOException {
055            final int b = super.read();
056            this.logger.put(this.fqcn, b);
057            return b;
058        }
059    
060        @Override
061        public int read(final byte[] b) throws IOException {
062            return read(b, 0, b.length);
063        }
064    
065        @Override
066        public int read(final byte[] b, final int off, final int len) throws IOException {
067            final int bytesRead = super.read(b, off, len);
068            this.logger.put(this.fqcn, b, off, bytesRead);
069            return bytesRead;
070        }
071    
072        @Override
073        public String toString() {
074            return LoggerInputStream.class.getSimpleName() + "{stream=" + this.in + '}';
075        }
076    }