| /* |
| * 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.query; |
| |
| import org.apache.eagle.log.base.taggedlog.TaggedLogAPIEntity; |
| import org.apache.eagle.log.entity.*; |
| import org.slf4j.Logger; |
| import org.slf4j.LoggerFactory; |
| |
| import java.util.ArrayList; |
| import java.util.List; |
| |
| /** |
| * @since : 10/30/14,2014. |
| */ |
| public class GenericEntityQuery implements GenericQuery,EntityCreationListener { |
| private static final Logger LOG = LoggerFactory.getLogger(GenericEntityQuery.class); |
| |
| private List<TaggedLogAPIEntity> entities = new ArrayList<TaggedLogAPIEntity>(); |
| private StreamReader reader; |
| |
| public GenericEntityQuery(String serviceName, SearchCondition condition, String metricName) throws IllegalAccessException, InstantiationException { |
| if (serviceName.equals(GenericMetricEntity.GENERIC_METRIC_SERVICE)) { |
| if (LOG.isDebugEnabled()) { |
| LOG.debug("List metric query"); |
| } |
| if (metricName == null || metricName.isEmpty()) { |
| throw new IllegalArgumentException("metricName should not be empty for metric list query"); |
| } |
| if (!condition.getOutputFields().contains(GenericMetricEntity.VALUE_FIELD)) { |
| condition.getOutputFields().add(GenericMetricEntity.VALUE_FIELD); |
| } |
| reader = new GenericEntityStreamReader(serviceName, condition,metricName); |
| } else { |
| if (LOG.isDebugEnabled()) { |
| LOG.debug("List entity query"); |
| } |
| reader = new GenericEntityStreamReader(serviceName, condition); |
| } |
| reader.register(this); |
| } |
| |
| @Override |
| public long getLastTimestamp() { |
| return reader.getLastTimestamp(); |
| } |
| |
| @Override |
| public void entityCreated(TaggedLogAPIEntity entity) { |
| entities.add(entity); |
| } |
| |
| @Override |
| public List<TaggedLogAPIEntity> result() throws Exception { |
| if (LOG.isDebugEnabled()) { |
| LOG.debug("Start reading as batch mode"); |
| } |
| reader.readAsStream(); |
| return entities; |
| } |
| |
| @Override |
| public long getFirstTimeStamp() { |
| return reader.getFirstTimestamp(); |
| } |
| } |