    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.FilterReader;
    021    import java.io.IOException;
    022    import java.io.Reader;
    023    import java.nio.CharBuffer;
    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 LoggerReader extends FilterReader {
    035        private static final String FQCN = LoggerReader.class.getName();
    036
    037        private final CharStreamLogger logger;
    038        private final String fqcn;
    039
    040        protected LoggerReader(final Reader reader, final ExtendedLogger logger, final String fqcn, final Level level,
    041                               final Marker marker) {
    042            super(reader);
    043            this.logger = new CharStreamLogger(logger, level, marker);
    044            this.fqcn = fqcn == null ? FQCN : fqcn;
    045        }
    046
    047        @Override
    048        public void close() throws IOException {
    049            super.close();
    050            this.logger.close(this.fqcn);
    051        }
    052
    053        @Override
    054        public int read() throws IOException {
    055            final int c = super.read();
    056            this.logger.put(this.fqcn, c);
    057            return c;
    058        }
    059
    060        @Override
    061        public int read(final char[] cbuf) throws IOException {
    062            return read(cbuf, 0, cbuf.length);
    063        }
    064
    065        @Override
    066        public int read(final char[] cbuf, final int off, final int len) throws IOException {
    067            final int charsRead = super.read(cbuf, off, len);
    068            this.logger.put(this.fqcn, cbuf, off, charsRead);
    069            return charsRead;
    070        }
    071
    072        @Override
    073        public int read(final CharBuffer target) throws IOException {
    074            final int len = target.remaining();
    075            final char[] cbuf = new char[len];
    076            final int charsRead = read(cbuf, 0, len);
    077            if (charsRead > 0) {
    078                target.put(cbuf, 0, charsRead);
    079            }
    080            return charsRead;
    081        }
    082
    083        @Override
    084        public String toString() {
    085            return LoggerReader.class.getSimpleName() + "{stream=" + this.in + '}';
    086        }
    087    }