| /* |
| * 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.phoenix.log; |
| |
| import java.io.Closeable; |
| import java.io.IOException; |
| import java.sql.SQLException; |
| import java.util.concurrent.Executors; |
| import java.util.concurrent.ThreadFactory; |
| import java.util.concurrent.TimeUnit; |
| |
| import org.apache.hadoop.conf.Configuration; |
| import org.apache.phoenix.query.QueryServices; |
| import org.slf4j.Logger; |
| import org.slf4j.LoggerFactory; |
| |
| import com.google.common.util.concurrent.ThreadFactoryBuilder; |
| import com.lmax.disruptor.BlockingWaitStrategy; |
| import com.lmax.disruptor.EventTranslator; |
| import com.lmax.disruptor.ExceptionHandler; |
| import com.lmax.disruptor.TimeoutException; |
| import com.lmax.disruptor.WaitStrategy; |
| import com.lmax.disruptor.dsl.Disruptor; |
| import com.lmax.disruptor.dsl.ProducerType; |
| |
| public class QueryLoggerDisruptor implements Closeable{ |
| |
| private volatile Disruptor<RingBufferEvent> disruptor; |
| private boolean isClosed = false; |
| //number of elements to create within the ring buffer. |
| private static final int RING_BUFFER_SIZE = 8 * 1024; |
| private static final Logger LOGGER = LoggerFactory.getLogger(QueryLoggerDisruptor.class); |
| private static final String DEFAULT_WAIT_STRATEGY = BlockingWaitStrategy.class.getName(); |
| |
| public QueryLoggerDisruptor(Configuration configuration) throws SQLException{ |
| WaitStrategy waitStrategy; |
| try { |
| waitStrategy = (WaitStrategy)Class |
| .forName(configuration.get(QueryServices.LOG_BUFFER_WAIT_STRATEGY, DEFAULT_WAIT_STRATEGY)).newInstance(); |
| } catch (InstantiationException | IllegalAccessException | ClassNotFoundException e) { |
| throw new SQLException(e); |
| } |
| |
| ThreadFactory threadFactory = new ThreadFactoryBuilder() |
| .setNameFormat("QueryLogger" + "-thread-%s") |
| .setDaemon(true) |
| .setThreadFactory(new ThreadFactory() { |
| @Override |
| public Thread newThread(Runnable r) { |
| final Thread result = Executors.defaultThreadFactory().newThread(r); |
| result.setContextClassLoader(QueryLoggerDisruptor.class.getClass().getClassLoader()); |
| return result; |
| } |
| }) |
| .build(); |
| disruptor = new Disruptor<RingBufferEvent>(RingBufferEvent.FACTORY, |
| configuration.getInt(QueryServices.LOG_BUFFER_SIZE, RING_BUFFER_SIZE), threadFactory, ProducerType.MULTI, |
| waitStrategy); |
| final ExceptionHandler<RingBufferEvent> errorHandler = new QueryLoggerDefaultExceptionHandler(); |
| disruptor.setDefaultExceptionHandler(errorHandler); |
| |
| final QueryLogDetailsEventHandler[] handlers = { new QueryLogDetailsEventHandler(configuration) }; |
| disruptor.handleEventsWith(handlers); |
| LOGGER.info("Starting QueryLoggerDisruptor for with ringbufferSize=" + |
| disruptor.getRingBuffer().getBufferSize() + ", waitStrategy=" + |
| waitStrategy.getClass().getSimpleName() + ", " + "exceptionHandler=" |
| + errorHandler + "..."); |
| disruptor.start(); |
| |
| } |
| |
| /** |
| * Attempts to publish an event by translating (write) data representations into events claimed from the RingBuffer. |
| * @param translator |
| * @return |
| */ |
| public boolean tryPublish(final EventTranslator<RingBufferEvent> translator) { |
| if(isClosed()){ |
| return false; |
| } |
| return disruptor.getRingBuffer().tryPublishEvent(translator); |
| } |
| |
| |
| public boolean isClosed() { |
| return isClosed ; |
| } |
| |
| @Override |
| public void close() throws IOException { |
| isClosed = true; |
| LOGGER.info("Shutting down QueryLoggerDisruptor.."); |
| try { |
| //we can wait for 2 seconds, so that backlog can be committed |
| disruptor.shutdown(2, TimeUnit.SECONDS); |
| } catch (TimeoutException e) { |
| throw new IOException(e); |
| } |
| |
| } |
| |
| |
| } |