1 /*
2 * Licensed to the Apache Software Foundation (ASF) under one or more
3 * contributor license agreements. See the NOTICE file distributed with
4 * this work for additional information regarding copyright ownership.
5 * The ASF licenses this file to You under the Apache License, Version 2.0
6 * (the "License"); you may not use this file except in compliance with
7 * the License. You may obtain a copy of the License at
8 *
9 * http://www.apache.org/licenses/LICENSE-2.0
10 *
11 * Unless required by applicable law or agreed to in writing, software
12 * distributed under the License is distributed on an "AS IS" BASIS,
13 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
14 * See the License for the specific language governing permissions and
15 * limitations under the License.
16 */
17
18 package org.apache.logging.log4j.io;
19
20 import java.io.IOException;
21 import java.io.OutputStream;
22 import java.nio.charset.Charset;
23
24 import org.apache.logging.log4j.Level;
25 import org.apache.logging.log4j.Marker;
26 import org.apache.logging.log4j.spi.ExtendedLogger;
27
28 /**
29 * Logs each line written to a pre-defined level. Can also be configured with a Marker. This class provides an interface
30 * that follows the {@link java.io.OutputStream} methods in spirit, but doesn't require output to any external stream.
31 * This class should <em>not</em> be used as a stream for an underlying logger unless it's being used as a bridge.
32 * Otherwise, infinite loops may occur!
33 *
34 * @since 2.1
35 */
36 public class LoggerOutputStream extends OutputStream {
37 private static final String FQCN = LoggerOutputStream.class.getName();
38
39 private final ByteStreamLogger logger;
40 private final String fqcn;
41
42 protected LoggerOutputStream(final ExtendedLogger logger, final Level level, final Marker marker,
43 final Charset charset, final String fqcn) {
44 this.logger = new ByteStreamLogger(logger, level, marker, charset);
45 this.fqcn = fqcn == null ? FQCN : fqcn;
46 }
47
48 @Override
49 public void close() throws IOException {
50 this.logger.close(this.fqcn);
51 }
52
53 @Override
54 public void flush() throws IOException {
55 // do nothing
56 }
57
58 @Override
59 public void write(final byte[] b) throws IOException {
60 this.logger.put(this.fqcn, b, 0, b.length);
61 }
62
63 @Override
64 public void write(final byte[] b, final int off, final int len) throws IOException {
65 this.logger.put(this.fqcn, b, off, len);
66 }
67
68 @Override
69 public void write(final int b) throws IOException {
70 this.logger.put(this.fqcn, (byte) (b & 0xFF));
71 }
72 }