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.InputStream; 022import java.io.InputStreamReader; 023import java.nio.ByteBuffer; 024import java.nio.charset.Charset; 025 026import org.apache.logging.log4j.Level; 027import org.apache.logging.log4j.Marker; 028import org.apache.logging.log4j.spi.ExtendedLogger; 029 030/** 031 * 032 * @since 2.1 033 */ 034public class ByteStreamLogger { 035 private class ByteBufferInputStream extends InputStream { 036 037 @Override 038 public int read() throws IOException { 039 ByteStreamLogger.this.buf.flip(); 040 int result = -1; 041 if (ByteStreamLogger.this.buf.limit() > 0) { 042 result = ByteStreamLogger.this.buf.get() & 0xFF; 043 } 044 ByteStreamLogger.this.buf.compact(); 045 return result; 046 } 047 048 @Override 049 public int read(final byte[] bytes, final int off, final int len) throws IOException { 050 ByteStreamLogger.this.buf.flip(); 051 int result = -1; 052 if (ByteStreamLogger.this.buf.limit() > 0) { 053 result = Math.min(len, ByteStreamLogger.this.buf.limit()); 054 ByteStreamLogger.this.buf.get(bytes, off, result); 055 } 056 ByteStreamLogger.this.buf.compact(); 057 return result; 058 } 059 } 060 061 private static final int BUFFER_SIZE = 1024; 062 private final ExtendedLogger logger; 063 private final Level level; 064 private final Marker marker; 065 private final InputStreamReader reader; 066 private final char[] msgBuf = new char[BUFFER_SIZE]; 067 private final StringBuilder msg = new StringBuilder(); 068 private boolean closed; 069 070 private final ByteBuffer buf = ByteBuffer.allocate(BUFFER_SIZE); 071 072 public ByteStreamLogger(final ExtendedLogger logger, final Level level, final Marker marker, final Charset charset) { 073 this.logger = logger; 074 this.level = level == null ? logger.getLevel() : level; 075 this.marker = marker; 076 this.reader = new InputStreamReader(new ByteBufferInputStream(), 077 charset == null ? Charset.defaultCharset() : charset); 078 } 079 080 public void close(final String fqcn) { 081 synchronized (this.msg) { 082 this.closed = true; 083 logEnd(fqcn); 084 } 085 } 086 087 private void extractMessages(final String fqcn) throws IOException { 088 if (this.closed) { 089 return; 090 } 091 int read = this.reader.read(this.msgBuf); 092 while (read > 0) { 093 int off = 0; 094 for (int pos = 0; pos < read; pos++) { 095 switch (this.msgBuf[pos]) { 096 case '\r': 097 this.msg.append(this.msgBuf, off, pos - off); 098 off = pos + 1; 099 break; 100 case '\n': 101 this.msg.append(this.msgBuf, off, pos - off); 102 off = pos + 1; 103 log(fqcn); 104 break; 105 } 106 } 107 this.msg.append(this.msgBuf, off, read - off); 108 read = this.reader.read(this.msgBuf); 109 } 110 } 111 112 private void log(final String fqcn) { 113 // convert to string now so async loggers work 114 this.logger.logIfEnabled(fqcn, this.level, this.marker, this.msg.toString()); 115 this.msg.setLength(0); 116 } 117 118 private void logEnd(final String fqcn) { 119 if (this.msg.length() > 0) { 120 log(fqcn); 121 } 122 } 123 124 public void put(final String fqcn, final byte[] b, final int off, final int len) throws IOException { 125 int curOff = off; 126 int curLen = len; 127 if (curLen >= 0) { 128 synchronized (this.msg) { 129 while (curLen > this.buf.remaining()) { 130 final int remaining = this.buf.remaining(); 131 this.buf.put(b, curOff, remaining); 132 curLen -= remaining; 133 curOff += remaining; 134 extractMessages(fqcn); 135 } 136 this.buf.put(b, curOff, curLen); 137 extractMessages(fqcn); 138 } 139 } else { 140 logEnd(fqcn); 141 } 142 } 143 144 public void put(final String fqcn, final int b) throws IOException { 145 if (b >= 0) { 146 synchronized (this.msg) { 147 this.buf.put((byte) (b & 0xFF)); 148 extractMessages(fqcn); 149 } 150 } else { 151 logEnd(fqcn); 152 } 153 } 154}