| /* |
| * 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.omid.tso; |
| |
| import com.google.common.util.concurrent.ThreadFactoryBuilder; |
| import com.google.inject.Inject; |
| import org.apache.omid.committable.CommitTable; |
| import org.apache.omid.metrics.MetricsRegistry; |
| import org.apache.omid.metrics.Timer; |
| |
| import java.io.IOException; |
| import java.util.concurrent.Callable; |
| import java.util.concurrent.ExecutorService; |
| import java.util.concurrent.Executors; |
| import java.util.concurrent.Future; |
| |
| import org.slf4j.Logger; |
| import org.slf4j.LoggerFactory; |
| |
| import static org.apache.omid.metrics.MetricsUtils.name; |
| |
| public class LowWatermarkWriterImpl implements LowWatermarkWriter { |
| |
| private static final Logger LOG = LoggerFactory.getLogger(LowWatermarkWriterImpl.class); |
| |
| private final Timer lwmWriteTimer; |
| private final CommitTable.Writer lowWatermarkWriter; |
| private final ExecutorService lowWatermarkWriterExecutor; |
| private MetricsRegistry metrics; |
| |
| @Inject |
| LowWatermarkWriterImpl(TSOServerConfig config, |
| CommitTable commitTable, |
| MetricsRegistry metrics) |
| throws Exception { |
| this.metrics = metrics; |
| this.lowWatermarkWriter = commitTable.getWriter(); |
| // Low Watermark writer |
| ThreadFactoryBuilder lwmThreadFactory = new ThreadFactoryBuilder().setNameFormat("lwm-writer-%d"); |
| this.lowWatermarkWriterExecutor = Executors.newSingleThreadExecutor(lwmThreadFactory.build()); |
| |
| // Metrics config |
| this.lwmWriteTimer = metrics.timer(name("tso", "lwmWriter", "latency")); |
| LOG.info("PersistentProcessor initialized"); |
| } |
| |
| @Override |
| public Future<Void> persistLowWatermark(final long lowWatermark) { |
| |
| return lowWatermarkWriterExecutor.submit(new Callable<Void>() { |
| @Override |
| public Void call() throws IOException { |
| try { |
| lwmWriteTimer.start(); |
| lowWatermarkWriter.updateLowWatermark(lowWatermark); |
| lowWatermarkWriter.flush(); |
| } finally { |
| lwmWriteTimer.stop(); |
| } |
| return null; |
| } |
| }); |
| } |
| } |