| ~~ |
| ~~ 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 |
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| ~~ Unless required by applicable law or agreed to in writing, |
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| ~~ specific language governing permissions and limitations |
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| |
| Lens Code Structure |
| |
| Here is some detail on how the Apache Lens modules are structured - |
| |
| * <<checkstyle>> - Has checkstyle rules imposed on the project. |
| |
| * <<lens-api>> - Lens API. Has API primarily for the clients. |
| |
| * <<lens-server-api>> - Lens API mainly for server extensions. This contains API for Service, Driver, LensEvent, QueryRewriter etc. |
| |
| * <<lens-cube>> - Cube data model and query rewriting from cube QL to HQL done here. |
| |
| * <<lens-storage-db>> - Storage definition for DBStorage and DBStorageHandler. |
| |
| * <<lens-query-lib>> - The Query lib containing some Serde or OutputFormatter implementations. |
| |
| * <<lens-driver-hive>> - Driver implementation for Hive as execution engine. |
| |
| * <<lens-driver-jdbc>> - Driver implementation for JDBC as execution engine. |
| |
| * <<lens-server>> - The server module - containing the service implementations, REST resources and HttpServer itself. |
| |
| * <<lens-client>> - Java client built on top of REST interface. |
| |
| * <<lens-cli>> - CLI built using spring shell and lens-client. |
| |
| * <<lens-examples>> - Examples containing example schema and queries. |
| |
| * <<lens-dist>> - Packaging for binary distribution of lens |
| |
| * <<lens-ml-lib>> - Wrapper over Spark ML lib where input to a model is output of a query. |
| |
| * <<lens-ml-dist>> - Packaging for ml-lib - which has server, client, spark libraries and ml-lib. |
| |
| * <<lens-regression>> - The regression test suite. |
| |
