BAEL1731 Log4j2 Plugins
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Chirag Dewan
parent
4f12335bcf
commit
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package com.baeldung.logging.log4j2.plugins;
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import org.apache.logging.log4j.core.LogEvent;
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import org.apache.logging.log4j.core.config.plugins.Plugin;
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import org.apache.logging.log4j.core.pattern.ConverterKeys;
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import org.apache.logging.log4j.core.pattern.LogEventPatternConverter;
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import org.apache.logging.log4j.core.pattern.PatternConverter;
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@Plugin(name = "DockerPatternConverter", category = PatternConverter.CATEGORY)
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@ConverterKeys({"docker", "container"})
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public class DockerPatternConverter extends LogEventPatternConverter {
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private DockerPatternConverter(String[] options) {
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super("Docker", "docker");
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}
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public static DockerPatternConverter newInstance(String[] options) {
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return new DockerPatternConverter(options);
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}
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@Override
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public void format(LogEvent event, StringBuilder toAppendTo) {
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toAppendTo.append(dockerContainer());
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}
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private String dockerContainer() {
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//get docker container ID inside which application is running here
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return "container-1";
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}
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}
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package com.baeldung.logging.log4j2.plugins;
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import org.apache.logging.log4j.core.Core;
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import org.apache.logging.log4j.core.Filter;
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import org.apache.logging.log4j.core.Layout;
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import org.apache.logging.log4j.core.LogEvent;
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import org.apache.logging.log4j.core.appender.AbstractAppender;
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import org.apache.logging.log4j.core.config.plugins.Plugin;
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import org.apache.logging.log4j.core.config.plugins.PluginBuilderAttribute;
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import org.apache.logging.log4j.core.config.plugins.PluginBuilderFactory;
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import org.apache.logging.log4j.core.config.plugins.PluginElement;
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import org.apache.logging.log4j.core.config.plugins.validation.constraints.Required;
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import java.io.Serializable;
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@Plugin(name = "Kafka2", category = Core.CATEGORY_NAME)
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public class KafkaAppender extends AbstractAppender {
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@PluginBuilderFactory
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public static Builder newBuilder() {
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return new Builder();
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}
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public static class Builder implements org.apache.logging.log4j.core.util.Builder<KafkaAppender> {
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@PluginBuilderAttribute("name")
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@Required
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private String name;
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@PluginBuilderAttribute("ip")
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private String ipAddress;
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@PluginBuilderAttribute("port")
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private int port;
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@PluginBuilderAttribute("topic")
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private String topic;
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@PluginBuilderAttribute("partition")
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private String partition;
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@PluginElement("Layout")
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private Layout<? extends Serializable> layout;
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@PluginElement("Filter")
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private Filter filter;
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public Layout<? extends Serializable> getLayout() {
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return layout;
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}
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public Builder setLayout(Layout<? extends Serializable> layout) {
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this.layout = layout;
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return this;
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}
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public Filter getFilter() {
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return filter;
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}
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public String getName() {
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return name;
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}
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public Builder setName(String name) {
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this.name = name;
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return this;
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}
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public Builder setFilter(Filter filter) {
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this.filter = filter;
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return this;
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}
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public String getIpAddress() {
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return ipAddress;
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}
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public Builder setIpAddress(String ipAddress) {
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this.ipAddress = ipAddress;
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return this;
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}
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public int getPort() {
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return port;
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}
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public Builder setPort(int port) {
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this.port = port;
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return this;
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}
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public String getTopic() {
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return topic;
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}
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public Builder setTopic(String topic) {
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this.topic = topic;
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return this;
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}
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public String getPartition() {
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return partition;
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}
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public Builder setPartition(String partition) {
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this.partition = partition;
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return this;
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}
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@Override
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public KafkaAppender build() {
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return new KafkaAppender(getName(), getFilter(), getLayout(), true, new KafkaBroker(ipAddress, port, topic, partition));
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}
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}
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private KafkaBroker broker;
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private KafkaAppender(String name, Filter filter, Layout<? extends Serializable> layout, boolean ignoreExceptions, KafkaBroker broker) {
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super(name, filter, layout, ignoreExceptions);
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this.broker = broker;
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}
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@Override
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public void append(LogEvent event) {
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connectAndSendToKafka(broker, event);
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}
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private void connectAndSendToKafka(KafkaBroker broker, LogEvent event) {
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//send to Kafka
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}
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}
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package com.baeldung.logging.log4j2.plugins;
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import java.io.Serializable;
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public class KafkaBroker implements Serializable {
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private final String ipAddress;
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private final int port;
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public KafkaBroker(String ipAddress, int port, String topic, String partition) {
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this.ipAddress = ipAddress;
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this.port = port;
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this.topic = topic;
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this.partition = partition;
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}
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public String getTopic() {
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return topic;
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}
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public String getPartition() {
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return partition;
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}
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private final String topic;
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private final String partition;
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public String getIpAddress() {
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return ipAddress;
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}
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public int getPort() {
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return port;
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}
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}
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@ -0,0 +1,24 @@
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package com.baeldung.logging.log4j2.plugins;
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import org.apache.logging.log4j.core.LogEvent;
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import org.apache.logging.log4j.core.config.plugins.Plugin;
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import org.apache.logging.log4j.core.lookup.StrLookup;
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@Plugin(name = "kafka", category = StrLookup.CATEGORY)
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public class KafkaLookup implements StrLookup {
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@Override
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public String lookup(String key) {
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return getFromKafka(key);
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}
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@Override
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public String lookup(LogEvent event, String key) {
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return getFromKafka(key);
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}
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private String getFromKafka(String topicName) {
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//kafka search logic should go here
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return "topic1-p1";
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}
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}
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@ -50,6 +50,12 @@
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</Policies>
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</RollingFile>
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<MapAppender name="MapAppender"/>
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<Console name="DockerConsoleLogger" target="SYSTEM_OUT">
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<PatternLayout pattern="%pid %docker" />
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</Console>
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<Kafka2 name="KafkaLogger" ip ="127.0.0.1" port="9010" topic="log" partition="p-1">
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<PatternLayout pattern="%pid%style{%message}{red}%n" />
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</Kafka2>
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</Appenders>
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<Loggers>
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<Logger name="CONSOLE_PATTERN_APPENDER_MARKER" level="TRACE"
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additivity="false">
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<AppenderRef ref="ConsoleJSONAppender" />
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</Logger>
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<Logger name="com.baeldung.logging.log4j2.plugins" level="INFO">
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<AppenderRef ref="KafkaLogger" />
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</Logger>
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<Root level="DEBUG">
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<AppenderRef ref="ConsoleAppender" />
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<AppenderRef ref="MapAppender" />
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