Github user zhouxinyu commented on a diff in the pull request:
https://github.com/apache/incubator-rocketmq/pull/101#discussion_r116381299
--- Diff:
logappender/src/main/java/org/apache/rocketmq/logappender/log4j2/RocketmqLog4j2Appender.java
---
@@ -0,0 +1,233 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements. See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License. You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.apache.rocketmq.logappender.log4j2;
+
+import org.apache.logging.log4j.core.Appender;
+import org.apache.logging.log4j.core.Filter;
+import org.apache.logging.log4j.core.ErrorHandler;
+import org.apache.logging.log4j.core.Layout;
+import org.apache.logging.log4j.core.LogEvent;
+import org.apache.logging.log4j.core.config.Node;
+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.PluginElement;
+import org.apache.rocketmq.common.message.Message;
+import org.apache.rocketmq.logappender.common.ProducerInstance;
+import org.apache.logging.log4j.core.appender.AbstractAppender;
+import
org.apache.logging.log4j.core.config.plugins.validation.constraints.Required;
+import org.apache.logging.log4j.core.layout.SerializedLayout;
+import org.apache.rocketmq.client.producer.MQProducer;
+
+import java.io.Serializable;
+import java.util.concurrent.TimeUnit;
+
+/**
+ * Log4j2 Appender Component
+ */
+@Plugin(name = "RocketMQ",
+ category = Node.CATEGORY,
+ elementType = Appender.ELEMENT_TYPE,
+ printObject = true)
+public class RocketmqLog4j2Appender extends AbstractAppender {
+
+ /**
+ * RocketMQ nameserver address
+ */
+ private String nameServerAddress;
+
+ /**
+ * Log producer group
+ */
+ private String producerGroup;
+
+ /**
+ * Log producer send instance
+ */
+ private MQProducer producer;
+
+ /**
+ * Appended message tag define
+ */
+ private String tag;
+
+ /**
+ * Whitch topic to send log messages
+ */
+ private String topic;
+
+
+ protected RocketmqLog4j2Appender(String name, Filter filter, Layout<?
extends Serializable> layout,
+ boolean ignoreExceptions, String
nameServerAddress, String producerGroup,
+ String topic, String tag) {
+ super(name, filter, layout, ignoreExceptions);
+ this.producer = producer;
+ this.topic = topic;
+ this.tag = tag;
+ this.nameServerAddress = nameServerAddress;
+ this.producerGroup = producerGroup;
+ try {
+ this.producer =
ProducerInstance.getInstance(this.nameServerAddress, this.producerGroup);
+ } catch (Exception e) {
+ ErrorHandler handler = this.getHandler();
+ if (handler != null) {
+ handler.error("Starting RocketmqLog4j2Appender [" +
this.getName()
+ + "] nameServerAddress:" + nameServerAddress + "
group:" + producerGroup + " " + e.getMessage());
+ }
+ }
+ }
+
+ /**
+ * Info,error,warn,callback method implementation
+ *
+ * @param event
+ */
+ public void append(LogEvent event) {
+ if (null == producer) {
+ return;
+ }
+
+ try {
+ byte[] bytes = this.getLayout().toByteArray(event);
+ Message msg = new Message(topic, tag, bytes);
+ msg.getProperties().put(ProducerInstance.APPENDER_TYPE,
ProducerInstance.LOG4J2_APPENDER);
+
+ //Send message and do not wait for the ack from the message
broker.
+ producer.sendOneway(msg);
+ } catch (Exception e) {
+ ErrorHandler handler = this.getHandler();
+ if (handler != null) {
+ handler.error("Could not send message in
RocketmqLog4j2Appender [" + this.getName() + "].", e);
--- End diff --
May be we want to know which log message isn't send to server?
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