Github user Vlad-Storona commented on a diff in the pull request: https://github.com/apache/drill/pull/774#discussion_r148957511 --- Diff: contrib/storage-opentsdb/src/main/java/org/apache/drill/exec/store/openTSDB/client/query/DBQuery.java --- @@ -0,0 +1,148 @@ +/* + * 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.drill.exec.store.openTSDB.client.query; + +import org.apache.drill.common.exceptions.UserException; +import org.slf4j.Logger; +import org.slf4j.LoggerFactory; + +import java.util.HashSet; +import java.util.Set; + +/** + * DBQuery is an abstraction of an openTSDB query, + * that used for extracting data from the storage system by POST request to DB. + * <p> + * An OpenTSDB query requires at least one sub query, + * a means of selecting which time series should be included in the result set. + */ +public class DBQuery { + + private static final Logger log = + LoggerFactory.getLogger(DBQuery.class); + /** + * The start time for the query. This can be a relative or absolute timestamp. + */ + private String start; + /** + * An end time for the query. If not supplied, the TSD will assume the local system time on the server. + * This may be a relative or absolute timestamp. This param is optional, and if it isn't specified we will send null + * to the db in this field, but in this case db will assume the local system time on the server. + */ + private String end; + /** + * One or more sub subQueries used to select the time series to return. + */ + private Set<Query> queries; + + private DBQuery(Builder builder) { + this.start = builder.start; + this.end = builder.end; + this.queries = builder.queries; + } + + public String getStart() { + return start; + } + + public String getEnd() { + return end; + } + + public Set<Query> getQueries() { + return queries; + } + + public static class Builder { + + private String start; + private String end; + private Set<Query> queries = new HashSet<>(); + + public Builder() { + } + + public Builder setStartTime(String startTime) { + if (startTime == null) { + throw UserException.validationError() + .message("start param must be specified") + .build(log); + } + this.start = startTime; + return this; + } + + public Builder setEndTime(String endTime) { + this.end = endTime; + return this; + } + + public Builder setQueries(Set<Query> queries) { + if (queries.isEmpty()) { + throw UserException.validationError() + .message("Required params such as metric, aggregator weren't specified. " + + "Add this params to the query") --- End diff -- Ok
---