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 018package org.apache.logging.log4j.io; 019 020import java.io.IOException; 021import java.io.OutputStream; 022import java.nio.charset.Charset; 023 024import org.apache.logging.log4j.Level; 025import org.apache.logging.log4j.Marker; 026import org.apache.logging.log4j.io.internal.InternalOutputStream; 027import org.apache.logging.log4j.spi.ExtendedLogger; 028 029/** 030 * Logs each line written to a pre-defined level. Can also be configured with a Marker. This class provides an interface 031 * that follows the {@link java.io.OutputStream} methods in spirit, but doesn't require output to any external stream. 032 * This class should <em>not</em> be used as a stream for an underlying logger unless it's being used as a bridge. 033 * Otherwise, infinite loops may occur! 034 * 035 * @since 2.1 036 */ 037public class LoggerOutputStream extends OutputStream { 038 private static final String FQCN = LoggerOutputStream.class.getName(); 039 040 private final InternalOutputStream logger; 041 042 protected LoggerOutputStream(final ExtendedLogger logger, final Level level, final Marker marker, 043 final Charset charset, final String fqcn) { 044 this.logger = new InternalOutputStream(logger, level, marker, charset, fqcn == null ? FQCN : fqcn); 045 } 046 047 @Override 048 public void close() throws IOException { 049 this.logger.close(); 050 } 051 052 @Override 053 public void flush() throws IOException { 054 // do nothing 055 } 056 057 @Override 058 public void write(final byte[] b) throws IOException { 059 logger.write(b); 060 } 061 062 @Override 063 public void write(final byte[] b, final int off, final int len) throws IOException { 064 logger.write(b, off, len); 065 } 066 067 @Override 068 public void write(final int b) throws IOException { 069 logger.write(b); 070 } 071}