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17 package org.apache.logging.log4j.core.appender;
18
19 import java.io.Serializable;
20
21 import org.apache.logging.log4j.core.Appender;
22 import org.apache.logging.log4j.core.ErrorHandler;
23 import org.apache.logging.log4j.core.Filter;
24 import org.apache.logging.log4j.core.Layout;
25 import org.apache.logging.log4j.core.LogEvent;
26 import org.apache.logging.log4j.core.filter.AbstractFilterable;
27 import org.apache.logging.log4j.core.util.Integers;
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33 public abstract class AbstractAppender extends AbstractFilterable
34 implements Appender {
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36 private static final long serialVersionUID = 1L;
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38 private final boolean ignoreExceptions;
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40 private ErrorHandler handler = new DefaultErrorHandler(this);
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42 private final Layout<? extends Serializable> layout;
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44 private final String name;
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46 public static int parseInt(final String s, final int defaultValue) {
47 try {
48 return Integers.parseInt(s, defaultValue);
49 } catch (final NumberFormatException e) {
50 LOGGER.error("Could not parse \"{}\" as an integer, using default value {}: {}", s, defaultValue, e);
51 return defaultValue;
52 }
53 }
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61 protected AbstractAppender(final String name, final Filter filter, final Layout<? extends Serializable> layout) {
62 this(name, filter, layout, true);
63 }
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73 protected AbstractAppender(final String name, final Filter filter, final Layout<? extends Serializable> layout,
74 final boolean ignoreExceptions) {
75 super(filter);
76 this.name = name;
77 this.layout = layout;
78 this.ignoreExceptions = ignoreExceptions;
79 }
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85 public void error(final String msg) {
86 handler.error(msg);
87 }
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96 public void error(final String msg, final LogEvent event, final Throwable t) {
97 handler.error(msg, event, t);
98 }
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105 public void error(final String msg, final Throwable t) {
106 handler.error(msg, t);
107 }
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113 @Override
114 public ErrorHandler getHandler() {
115 return handler;
116 }
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122 @Override
123 public Layout<? extends Serializable> getLayout() {
124 return layout;
125 }
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131 @Override
132 public String getName() {
133 return name;
134 }
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142 @Override
143 public boolean ignoreExceptions() {
144 return ignoreExceptions;
145 }
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151 @Override
152 public void setHandler(final ErrorHandler handler) {
153 if (handler == null) {
154 LOGGER.error("The handler cannot be set to null");
155 }
156 if (isStarted()) {
157 LOGGER.error("The handler cannot be changed once the appender is started");
158 return;
159 }
160 this.handler = handler;
161 }
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163 @Override
164 public String toString() {
165 return name;
166 }
167
168 }