    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.IOException;
    021    import java.io.Writer;
    022
    023    import org.apache.logging.log4j.Level;
    024    import org.apache.logging.log4j.Marker;
    025    import org.apache.logging.log4j.spi.ExtendedLogger;
    026
    027    /**
    028     * Logs each line written to a pre-defined level. Can also be configured with a Marker. This class provides an interface
    029     * that follows the {@link java.io.Writer} methods in spirit, but doesn't require output to any external writer.
    030     *
    031     * @since 2.1
    032     */
    033    public class LoggerWriter extends Writer {
    034        private static final String FQCN = LoggerWriter.class.getName();
    035
    036        private final CharStreamLogger logger;
    037        private final String fqcn;
    038
    039        protected LoggerWriter(final ExtendedLogger logger, final String fqcn, final Level level, final Marker marker) {
    040            this.logger = new CharStreamLogger(logger, level, marker);
    041            this.fqcn = fqcn == null ? FQCN : fqcn;
    042        }
    043
    044        @Override
    045        public void close() throws IOException {
    046            this.logger.close(this.fqcn);
    047        }
    048
    049        @Override
    050        public void flush() throws IOException {
    051            // do nothing
    052        }
    053
    054        @Override
    055        public String toString() {
    056            return this.getClass().getSimpleName() + "[fqcn=" + this.fqcn + ", logger=" + this.logger + "]";
    057        }
    058
    059        @Override
    060        public void write(final char[] cbuf) throws IOException {
    061            this.logger.put(this.fqcn, cbuf, 0, cbuf.length);
    062        }
    063
    064        @Override
    065        public void write(final char[] cbuf, final int off, final int len) throws IOException {
    066            this.logger.put(this.fqcn, cbuf, off, len);
    067        }
    068
    069        @Override
    070        public void write(final int c) throws IOException {
    071            this.logger.put(this.fqcn, (char) c);
    072        }
    073
    074        @Override
    075        public void write(final String str) throws IOException {
    076            this.logger.put(this.fqcn, str, 0, str.length());
    077        }
    078
    079        @Override
    080        public void write(final String str, final int off, final int len) throws IOException {
    081            this.logger.put(this.fqcn, str, off, len);
    082        }
    083    }