1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17 package org.apache.logging.log4j.core.appender;
18
19 import java.util.concurrent.TimeUnit;
20 import java.util.concurrent.locks.Lock;
21 import java.util.concurrent.locks.ReadWriteLock;
22 import java.util.concurrent.locks.ReentrantReadWriteLock;
23
24 import org.apache.logging.log4j.core.Filter;
25 import org.apache.logging.log4j.core.LogEvent;
26 import org.apache.logging.log4j.core.StringLayout;
27 import org.apache.logging.log4j.core.config.Property;
28
29
30
31
32
33
34
35 public abstract class AbstractWriterAppender<M extends WriterManager> extends AbstractAppender {
36
37
38
39
40
41
42
43
44
45 protected final boolean immediateFlush;
46 private final M manager;
47 private final ReadWriteLock readWriteLock = new ReentrantReadWriteLock();
48 private final Lock readLock = readWriteLock.readLock();
49
50
51
52
53
54
55
56
57
58
59
60
61
62 protected AbstractWriterAppender(final String name, final StringLayout layout, final Filter filter,
63 final boolean ignoreExceptions, final boolean immediateFlush, final Property[] properties, final M manager) {
64 super(name, filter, layout, ignoreExceptions, properties);
65 this.manager = manager;
66 this.immediateFlush = immediateFlush;
67 }
68
69
70
71
72
73
74
75
76
77
78
79
80 @Deprecated
81 protected AbstractWriterAppender(final String name, final StringLayout layout, final Filter filter,
82 final boolean ignoreExceptions, final boolean immediateFlush, final M manager) {
83 super(name, filter, layout, ignoreExceptions, Property.EMPTY_ARRAY);
84 this.manager = manager;
85 this.immediateFlush = immediateFlush;
86 }
87
88
89
90
91
92
93
94
95
96
97 @Override
98 public void append(final LogEvent event) {
99 readLock.lock();
100 try {
101 final String str = getStringLayout().toSerializable(event);
102 if (str.length() > 0) {
103 manager.write(str);
104 if (this.immediateFlush || event.isEndOfBatch()) {
105 manager.flush();
106 }
107 }
108 } catch (final AppenderLoggingException ex) {
109 error("Unable to write " + manager.getName() + " for appender " + getName(), event, ex);
110 throw ex;
111 } finally {
112 readLock.unlock();
113 }
114 }
115
116
117
118
119
120
121 public M getManager() {
122 return manager;
123 }
124
125 public StringLayout getStringLayout() {
126 return (StringLayout) getLayout();
127 }
128
129 @Override
130 public void start() {
131 if (getLayout() == null) {
132 LOGGER.error("No layout set for the appender named [{}].", getName());
133 }
134 if (manager == null) {
135 LOGGER.error("No OutputStreamManager set for the appender named [{}].", getName());
136 }
137 super.start();
138 }
139
140 @Override
141 public boolean stop(final long timeout, final TimeUnit timeUnit) {
142 setStopping();
143 boolean stopped = super.stop(timeout, timeUnit, false);
144 stopped &= manager.stop(timeout, timeUnit);
145 setStopped();
146 return stopped;
147 }
148 }