| /* |
| * 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.eagle.log.entity; |
| |
| import org.apache.eagle.log.base.taggedlog.TaggedLogAPIEntity; |
| import org.apache.eagle.log.entity.meta.EntityDefinition; |
| import org.apache.eagle.log.entity.meta.EntityDefinitionManager; |
| import org.apache.eagle.common.DateTimeUtil; |
| import org.slf4j.Logger; |
| import org.slf4j.LoggerFactory; |
| |
| import java.text.ParseException; |
| |
| public class GenericMetricEntityDecompactionStreamReader extends StreamReader |
| implements EntityCreationListener { |
| @SuppressWarnings("unused") |
| private static final Logger LOG = LoggerFactory |
| .getLogger(GenericMetricEntityDecompactionStreamReader.class); |
| private GenericEntityStreamReader reader; |
| private EntityDefinition ed; |
| private String serviceName = GenericMetricEntity.GENERIC_METRIC_SERVICE; |
| private long start; |
| private long end; |
| private GenericMetricShadowEntity single = new GenericMetricShadowEntity(); |
| |
| /** |
| * it makes sense that serviceName should not be provided while metric name should be provided as prefix |
| * |
| * @param metricName |
| * @param condition |
| * @throws InstantiationException |
| * @throws IllegalAccessException |
| * @throws ParseException |
| */ |
| public GenericMetricEntityDecompactionStreamReader(String metricName, SearchCondition condition) |
| throws InstantiationException, IllegalAccessException, ParseException { |
| ed = EntityDefinitionManager.getEntityByServiceName(serviceName); |
| checkIsMetric(ed); |
| reader = new GenericEntityStreamReader(serviceName, condition, metricName); |
| start = condition.getStartTime(); |
| end = condition.getEndTime(); |
| } |
| |
| private void checkIsMetric(EntityDefinition ed) { |
| if (ed.getMetricDefinition() == null) { |
| throw new IllegalArgumentException("Only metric entity comes here"); |
| } |
| } |
| |
| @Override |
| public void entityCreated(TaggedLogAPIEntity entity) throws Exception { |
| GenericMetricEntity e = (GenericMetricEntity)entity; |
| double[] value = e.getValue(); |
| if (value != null) { |
| int count = value.length; |
| @SuppressWarnings("unused") |
| Class<?> cls = ed.getMetricDefinition().getSingleTimestampEntityClass(); |
| for (int i = 0; i < count; i++) { |
| long ts = entity.getTimestamp() + i * ed.getMetricDefinition().getInterval(); |
| // exclude those entity which is not within the time range in search condition. [start, end) |
| if (ts < start || ts >= end) { |
| continue; |
| } |
| single.setTimestamp(ts); |
| single.setTags(entity.getTags()); |
| single.setValue(e.getValue()[i]); |
| for (EntityCreationListener l : listeners) { |
| l.entityCreated(single); |
| } |
| } |
| } |
| } |
| |
| @Override |
| public void readAsStream() throws Exception { |
| reader.register(this); |
| reader.readAsStream(); |
| } |
| |
| @Override |
| public long getLastTimestamp() { |
| return reader.getLastTimestamp(); |
| } |
| |
| @Override |
| public long getFirstTimestamp() { |
| return reader.getFirstTimestamp(); |
| } |
| } |