package org.apache.logging.log4j.core.appender;
import java.io.Serializable;
import java.util.Objects;
import javax.script.Bindings;
import org.apache.logging.log4j.core.Appender;
import org.apache.logging.log4j.core.Core;
import org.apache.logging.log4j.core.Filter;
import org.apache.logging.log4j.core.Layout;
import org.apache.logging.log4j.core.LogEvent;
import org.apache.logging.log4j.core.config.Configuration;
import org.apache.logging.log4j.core.config.Property;
import org.apache.logging.log4j.core.config.plugins.Plugin;
import org.apache.logging.log4j.core.config.plugins.PluginBuilderAttribute;
import org.apache.logging.log4j.core.config.plugins.PluginBuilderFactory;
import org.apache.logging.log4j.core.config.plugins.PluginConfiguration;
import org.apache.logging.log4j.core.config.plugins.PluginElement;
import org.apache.logging.log4j.core.config.plugins.validation.constraints.Required;
import org.apache.logging.log4j.core.script.AbstractScript;
import org.apache.logging.log4j.core.script.ScriptManager;
@Plugin(name = "ScriptAppenderSelector", category = Core.CATEGORY_NAME, elementType = Appender.ELEMENT_TYPE, printObject = true)
public class ScriptAppenderSelector extends AbstractAppender {
public static final class Builder implements org.apache.logging.log4j.core.util.Builder<Appender> {
@PluginElement("AppenderSet")
@Required
private AppenderSet appenderSet;
@PluginConfiguration
@Required
private Configuration configuration;
@PluginBuilderAttribute
@Required
private String name;
@PluginElement("Script")
@Required
private AbstractScript script;
@Override
public Appender build() {
if (name == null) {
LOGGER.error("Name missing.");
return null;
}
if (script == null) {
LOGGER.error("Script missing for ScriptAppenderSelector appender {}", name);
return null;
}
if (appenderSet == null) {
LOGGER.error("AppenderSet missing for ScriptAppenderSelector appender {}", name);
return null;
}
if (configuration == null) {
LOGGER.error("Configuration missing for ScriptAppenderSelector appender {}", name);
return null;
}
final ScriptManager scriptManager = configuration.getScriptManager();
scriptManager.addScript(script);
final Bindings bindings = scriptManager.createBindings(script);
LOGGER.debug("ScriptAppenderSelector '{}' executing {} '{}': {}", name, script.getLanguage(),
script.getName(), script.getScriptText());
final Object object = scriptManager.execute(script.getName(), bindings);
final String actualAppenderName = Objects.toString(object, null);
LOGGER.debug("ScriptAppenderSelector '{}' selected '{}'", name, actualAppenderName);
return appenderSet.createAppender(actualAppenderName, name);
}
public AppenderSet getAppenderSet() {
return appenderSet;
}
public Configuration getConfiguration() {
return configuration;
}
public String getName() {
return name;
}
public AbstractScript getScript() {
return script;
}
public Builder withAppenderNodeSet(@SuppressWarnings("hiding") final AppenderSet appenderSet) {
this.appenderSet = appenderSet;
return this;
}
public Builder withConfiguration(@SuppressWarnings("hiding") final Configuration configuration) {
this.configuration = configuration;
return this;
}
public Builder withName(@SuppressWarnings("hiding") final String name) {
this.name = name;
return this;
}
public Builder withScript(@SuppressWarnings("hiding") final AbstractScript script) {
this.script = script;
return this;
}
}
@PluginBuilderFactory
public static Builder newBuilder() {
return new Builder();
}
private ScriptAppenderSelector(final String name, final Filter filter, final Layout<? extends Serializable> layout,
final Property[] properties) {
super(name, filter, layout, true, Property.EMPTY_ARRAY);
}
@Override
public void append(final LogEvent event) {
}
}