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17 package org.apache.logging.log4j.core.appender;
18
19 import java.io.Serializable;
20 import java.util.Objects;
21
22 import javax.script.Bindings;
23
24 import org.apache.logging.log4j.core.Appender;
25 import org.apache.logging.log4j.core.Filter;
26 import org.apache.logging.log4j.core.Layout;
27 import org.apache.logging.log4j.core.LogEvent;
28 import org.apache.logging.log4j.core.config.Configuration;
29 import org.apache.logging.log4j.core.config.plugins.Plugin;
30 import org.apache.logging.log4j.core.config.plugins.PluginBuilderAttribute;
31 import org.apache.logging.log4j.core.config.plugins.PluginBuilderFactory;
32 import org.apache.logging.log4j.core.config.plugins.PluginConfiguration;
33 import org.apache.logging.log4j.core.config.plugins.PluginElement;
34 import org.apache.logging.log4j.core.config.plugins.validation.constraints.Required;
35 import org.apache.logging.log4j.core.script.AbstractScript;
36 import org.apache.logging.log4j.core.script.ScriptManager;
37
38 @Plugin(name = "ScriptAppenderSelector", category = "Core", elementType = Appender.ELEMENT_TYPE, printObject = true)
39 public class ScriptAppenderSelector extends AbstractAppender {
40
41
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43
44 public static final class Builder implements org.apache.logging.log4j.core.util.Builder<Appender> {
45
46 @PluginElement("AppenderSet")
47 @Required
48 private AppenderSet appenderSet;
49
50 @PluginConfiguration
51 @Required
52 private Configuration configuration;
53
54 @PluginBuilderAttribute
55 @Required
56 private String name;
57
58 @PluginElement("Script")
59 @Required
60 private AbstractScript script;
61
62 @Override
63 public Appender build() {
64 if (name == null) {
65 LOGGER.error("Name missing.");
66 return null;
67 }
68 if (script == null) {
69 LOGGER.error("Script missing for ScriptAppenderSelector appender {}", name);
70 return null;
71 }
72 if (appenderSet == null) {
73 LOGGER.error("AppenderSet missing for ScriptAppenderSelector appender {}", name);
74 return null;
75 }
76 if (configuration == null) {
77 LOGGER.error("Configuration missing for ScriptAppenderSelector appender {}", name);
78 return null;
79 }
80 final ScriptManager scriptManager = configuration.getScriptManager();
81 scriptManager.addScript(script);
82 final Bindings bindings = scriptManager.createBindings(script);
83 final Object object = scriptManager.execute(script.getName(), bindings);
84 final String appenderName = Objects.toString(object, null);
85 final Appender appender = appenderSet.createAppender(appenderName, name);
86 return appender;
87 }
88
89 public AppenderSet getAppenderSet() {
90 return appenderSet;
91 }
92
93 public Configuration getConfiguration() {
94 return configuration;
95 }
96
97 public String getName() {
98 return name;
99 }
100
101 public AbstractScript getScript() {
102 return script;
103 }
104
105 public Builder withAppenderNodeSet(@SuppressWarnings("hiding") final AppenderSet appenderSet) {
106 this.appenderSet = appenderSet;
107 return this;
108 }
109
110 public Builder withConfiguration(@SuppressWarnings("hiding") final Configuration configuration) {
111 this.configuration = configuration;
112 return this;
113 }
114
115 public Builder withName(@SuppressWarnings("hiding") final String name) {
116 this.name = name;
117 return this;
118 }
119
120 public Builder withScript(@SuppressWarnings("hiding") final AbstractScript script) {
121 this.script = script;
122 return this;
123 }
124
125 }
126
127 @PluginBuilderFactory
128 public static Builder newBuilder() {
129 return new Builder();
130 }
131
132 private ScriptAppenderSelector(final String name, final Filter filter, final Layout<? extends Serializable> layout) {
133 super(name, filter, layout);
134 }
135
136 @Override
137 public void append(final LogEvent event) {
138
139 }
140
141 }