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17 package org.apache.logging.log4j.core.filter;
18
19 import java.util.HashMap;
20 import java.util.Map;
21
22 import org.apache.logging.log4j.Level;
23 import org.apache.logging.log4j.Marker;
24 import org.apache.logging.log4j.ThreadContext;
25 import org.apache.logging.log4j.core.LogEvent;
26 import org.apache.logging.log4j.core.Logger;
27 import org.apache.logging.log4j.core.config.plugins.Plugin;
28 import org.apache.logging.log4j.core.config.plugins.PluginAttribute;
29 import org.apache.logging.log4j.core.config.plugins.PluginElement;
30 import org.apache.logging.log4j.core.config.plugins.PluginFactory;
31 import org.apache.logging.log4j.core.util.KeyValuePair;
32 import org.apache.logging.log4j.message.Message;
33
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36
37 @Plugin(name = "DynamicThresholdFilter", category = "Core", elementType = "filter", printObject = true)
38 public final class DynamicThresholdFilter extends AbstractFilter {
39 private Map<String, Level> levelMap = new HashMap<String, Level>();
40 private Level defaultThreshold = Level.ERROR;
41 private final String key;
42
43 private DynamicThresholdFilter(final String key, final Map<String, Level> pairs, final Level defaultLevel,
44 final Result onMatch, final Result onMismatch) {
45 super(onMatch, onMismatch);
46 if (key == null) {
47 throw new NullPointerException("key cannot be null");
48 }
49 this.key = key;
50 this.levelMap = pairs;
51 this.defaultThreshold = defaultLevel;
52 }
53
54 public String getKey() {
55 return this.key;
56 }
57
58 @Override
59 public Result filter(final Logger logger, final Level level, final Marker marker, final String msg,
60 final Object... params) {
61 return filter(level);
62 }
63
64 @Override
65 public Result filter(final Logger logger, final Level level, final Marker marker, final Object msg,
66 final Throwable t) {
67 return filter(level);
68 }
69
70 @Override
71 public Result filter(final Logger logger, final Level level, final Marker marker, final Message msg,
72 final Throwable t) {
73 return filter(level);
74 }
75
76 @Override
77 public Result filter(final LogEvent event) {
78 return filter(event.getLevel());
79 }
80
81 private Result filter(final Level level) {
82 final Object value = ThreadContext.get(key);
83 if (value != null) {
84 Level ctxLevel = levelMap.get(value);
85 if (ctxLevel == null) {
86 ctxLevel = defaultThreshold;
87 }
88 return level.isMoreSpecificThan(ctxLevel) ? onMatch : onMismatch;
89 }
90 return Result.NEUTRAL;
91
92 }
93
94 public Map<String, Level> getLevelMap() {
95 return levelMap;
96 }
97
98 @Override
99 public String toString() {
100 final StringBuilder sb = new StringBuilder();
101 sb.append("key=").append(key);
102 sb.append(", default=").append(defaultThreshold);
103 if (levelMap.size() > 0) {
104 sb.append('{');
105 boolean first = true;
106 for (final Map.Entry<String, Level> entry : levelMap.entrySet()) {
107 if (!first) {
108 sb.append(", ");
109 first = false;
110 }
111 sb.append(entry.getKey()).append('=').append(entry.getValue());
112 }
113 sb.append('}');
114 }
115 return sb.toString();
116 }
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127 @PluginFactory
128 public static DynamicThresholdFilter createFilter(
129 @PluginAttribute("key") final String key,
130 @PluginElement("Pairs") final KeyValuePair[] pairs,
131 @PluginAttribute("defaultThreshold") final Level defaultThreshold,
132 @PluginAttribute("onMatch") final Result onMatch,
133 @PluginAttribute("onMismatch") final Result onMismatch) {
134 final Map<String, Level> map = new HashMap<String, Level>();
135 for (final KeyValuePair pair : pairs) {
136 map.put(pair.getKey(), Level.toLevel(pair.getValue()));
137 }
138 final Level level = defaultThreshold == null ? Level.ERROR : defaultThreshold;
139 return new DynamicThresholdFilter(key, map, level, onMatch, onMismatch);
140 }
141 }