| /* |
| * 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.kylin.metrics.lib.impl.hive; |
| |
| import java.util.ArrayList; |
| import java.util.HashMap; |
| import java.util.List; |
| import java.util.Map; |
| import java.util.Properties; |
| |
| import org.apache.kylin.metrics.lib.ActiveReservoir; |
| import org.apache.kylin.metrics.lib.ActiveReservoirListener; |
| import org.apache.kylin.metrics.lib.ActiveReservoirReporter; |
| import org.apache.kylin.metrics.lib.Record; |
| import org.apache.kylin.metrics.lib.impl.ReporterBuilder; |
| import org.slf4j.Logger; |
| import org.slf4j.LoggerFactory; |
| |
| /** |
| * A reporter which listens for new records and publishes them to hive. |
| */ |
| public class HiveReservoirReporter extends ActiveReservoirReporter { |
| |
| public static final String HIVE_REPORTER_SUFFIX = "HIVE"; |
| public static final HiveSink sink = new HiveSink(); |
| protected static final Logger logger = LoggerFactory.getLogger(HiveReservoirReporter.class); |
| private final ActiveReservoir activeReservoir; |
| private final HiveReservoirListener listener; |
| |
| public HiveReservoirReporter(ActiveReservoir activeReservoir, Properties props) throws Exception { |
| this.activeReservoir = activeReservoir; |
| this.listener = new HiveReservoirListener(props); |
| } |
| |
| /** |
| * Returns a new {@link Builder} for {@link HiveReservoirReporter}. |
| * |
| * @param activeReservoir the registry to report |
| * @return a {@link Builder} instance for a {@link HiveReservoirReporter} |
| */ |
| public static Builder forRegistry(ActiveReservoir activeReservoir) { |
| return new Builder(activeReservoir); |
| } |
| |
| public static String getTableFromSubject(String subject) { |
| return sink.getTableFromSubject(subject); |
| } |
| |
| /** |
| * Starts the reporter. |
| */ |
| public void start() { |
| activeReservoir.addListener(listener); |
| } |
| |
| /** |
| * Stops the reporter. |
| */ |
| public void stop() { |
| activeReservoir.removeListener(listener); |
| } |
| |
| /** |
| * Stops the reporter. |
| */ |
| @Override |
| public void close() { |
| stop(); |
| } |
| |
| /** |
| * A builder for {@link HiveReservoirReporter} instances. |
| */ |
| public static class Builder extends ReporterBuilder { |
| |
| private Builder(ActiveReservoir activeReservoir) { |
| super(activeReservoir); |
| } |
| |
| private void setFixedProperties() { |
| } |
| |
| /** |
| * Builds a {@link HiveReservoirReporter} with the given properties. |
| * |
| * @return a {@link HiveReservoirReporter} |
| */ |
| public HiveReservoirReporter build() throws Exception { |
| setFixedProperties(); |
| return new HiveReservoirReporter(registry, props); |
| } |
| } |
| |
| private class HiveReservoirListener implements ActiveReservoirListener { |
| private Properties props; |
| private Map<String, HiveProducer> producerMap = new HashMap<>(); |
| |
| private HiveReservoirListener(Properties props) throws Exception { |
| this.props = props; |
| } |
| |
| private synchronized HiveProducer getProducer(String metricType) throws Exception { |
| HiveProducer producer = producerMap.get(metricType); |
| if (producer == null) { |
| producer = new HiveProducer(metricType, props); |
| producerMap.put(metricType, producer); |
| } |
| return producer; |
| } |
| |
| public boolean onRecordUpdate(final List<Record> records) { |
| if (records.isEmpty()) { |
| return true; |
| } |
| logger.info("Try to write {} records", records.size()); |
| try { |
| Map<String, List<Record>> queues = new HashMap<>(); |
| for (Record record : records) { |
| List<Record> recordQueues = queues.get(record.getType()); |
| if (recordQueues == null) { |
| recordQueues = new ArrayList<>(); |
| queues.put(record.getType(), recordQueues); |
| } |
| recordQueues.add(record); |
| } |
| for (Map.Entry<String, List<Record>> entry : queues.entrySet()) { |
| HiveProducer producer = getProducer(entry.getKey()); |
| producer.send(entry.getValue()); |
| } |
| queues.clear(); |
| } catch (Exception e) { |
| logger.error(e.getMessage(), e); |
| return false; |
| } |
| return true; |
| } |
| |
| public boolean onRecordUpdate(final Record record) { |
| try { |
| HiveProducer producer = getProducer(record.getType()); |
| producer.send(record); |
| } catch (Exception e) { |
| logger.error(e.getMessage(), e); |
| return false; |
| } |
| return true; |
| } |
| |
| public void close() { |
| for (HiveProducer producer : producerMap.values()) { |
| producer.close(); |
| } |
| producerMap.clear(); |
| } |
| } |
| } |