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Send Log statements to log Topic for Java Functions (#1447)
* Added LogTopic support to Java functions * UseLogAppender instead of PulsarAppender * Reverted changes to PulsarAppender * No need to take dep on pulsar-log4j plugin * Start the appender * Fixed comments * Reverted back logging function change
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...ar-functions/instance/src/main/java/org/apache/pulsar/functions/instance/LogAppender.java
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| /** | ||
| * 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.pulsar.functions.instance; | ||
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| import org.apache.logging.log4j.core.*; | ||
| import org.apache.pulsar.client.api.Producer; | ||
| import org.apache.pulsar.client.api.ProducerBuilder; | ||
| import org.apache.pulsar.client.api.PulsarClient; | ||
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| import java.io.Serializable; | ||
| import java.util.concurrent.TimeUnit; | ||
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| /** | ||
| * LogAppender class that is used to send log statements from Pulsar Functions logger | ||
| * to a log topic. | ||
| */ | ||
| public class LogAppender implements Appender { | ||
| private PulsarClient pulsarClient; | ||
| private String logTopic; | ||
| private String fqn; | ||
| private State state; | ||
| private ErrorHandler errorHandler; | ||
| private Producer<byte[]> producer; | ||
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| public LogAppender(PulsarClient pulsarClient, String logTopic, String fqn) { | ||
| this.pulsarClient = pulsarClient; | ||
| this.logTopic = logTopic; | ||
| this.fqn = fqn; | ||
| } | ||
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| @Override | ||
| public void append(LogEvent logEvent) { | ||
| producer.sendAsync(logEvent.getMessage().getFormattedMessage().getBytes()); | ||
| } | ||
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| @Override | ||
| public String getName() { | ||
| return fqn; | ||
| } | ||
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| @Override | ||
| public Layout<? extends Serializable> getLayout() { | ||
| return null; | ||
| } | ||
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| @Override | ||
| public boolean ignoreExceptions() { | ||
| return false; | ||
| } | ||
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| @Override | ||
| public ErrorHandler getHandler() { | ||
| return errorHandler; | ||
| } | ||
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| @Override | ||
| public void setHandler(ErrorHandler errorHandler) { | ||
| this.errorHandler = errorHandler; | ||
| } | ||
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| @Override | ||
| public State getState() { | ||
| return state; | ||
| } | ||
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| @Override | ||
| public void initialize() { | ||
| this.state = State.INITIALIZED; | ||
| } | ||
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| @Override | ||
| public void start() { | ||
| this.state = State.STARTING; | ||
| try { | ||
| ProducerBuilder<byte[]> producerBuilder = pulsarClient.newProducer() | ||
| .topic(logTopic) | ||
| .producerName(fqn) | ||
| .blockIfQueueFull(false) | ||
| .enableBatching(true) | ||
| .batchingMaxPublishDelay(10, TimeUnit.MILLISECONDS); | ||
| producer = producerBuilder.create(); | ||
| } catch (Exception e) { | ||
| throw new RuntimeException("Error starting LogTopic Producer", e); | ||
| } | ||
| this.state = State.STARTED; | ||
| } | ||
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| @Override | ||
| public void stop() { | ||
| this.state = State.STOPPING; | ||
| producer.closeAsync(); | ||
| producer = null; | ||
| this.state = State.STOPPED; | ||
| } | ||
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| @Override | ||
| public boolean isStarted() { | ||
| return state == State.STARTED; | ||
| } | ||
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| @Override | ||
| public boolean isStopped() { | ||
| return state == State.STOPPED; | ||
| } | ||
| } |