arcadedb (v0) ============= `arcadedb` is a CHICKEN Scheme egg module providing a driver or REPL for the [**ArcadeDB**](https://arcadedb.com) database. ## About **ArcadeDB** **ArcadeDB** is a multi-model NoSQL database providing the models: * Key-Value, * Document, * Graph, while supporting a wide range of data query languages, such as: * [SQL](https://docs.arcadedb.com/#_sql) (dialect), * [Cypher](https://opencypher.org/resources/), * [Gremlin](https://tinkerpop.apache.org/docs/current/), * [GraphQL](https://graphql.org/), * [MQL](https://www.mongodb.com/docs/manual/) (Mongo), as well as providing a JSON/REST/HTTP API. ### SQL The native query language of **ArcadeDB** is a dialect of SQL, closely related to _OrientDB_'s OSQL, which supports the [SQL command categories](https://www.geeksforgeeks.org/sql-ddl-dql-dml-dcl-tcl-commands/): * **DDL** - Data Definition Language, via `CREATE`, `DROP`, `ALTER`, `TRUNCATE` of `TYPE`s * **DQL** - Data Query Language, via `SELECT`, `TRAVERSE`, `MATCH` * **DML** - Data Manipulation Language, via `INSERT`, `UPDATE`, `DROP`, `EXPLAIN`, `PROFILE` for the remaining categories holds: * **DCL** - Data Control Language, does not apply due to only [server level users](https://docs.arcadedb.com/#Security) * **TCL** - Transaction Control Language, via [HTTP REST endpoints](https://docs.arcadedb.com/#HTTP-API) ## About `arcadedb` The `arcadedb` module implements a driver and console for **ArcadeDB** in _CHICKEN Scheme_ with the functionality: * [Server Connection](#server-connection) * [Server Information](#server-information) * [Server Databases](#server-databases) * [Database Management](#database-management) * [Database Connection](#database-connection) * [Database Interaction](#database-interaction) * [Database Macros](#database-macros) ### Runtime Dependencies Naturally, `arcadedb` requires a (running) remote or local **ArcadeDB** server: * [ArcadeDB](https://github.com/ArcadeData/arcadedb/releases/latest) which in turn requires a _Java_ distribution, i.e. _OpenJDK_, in versions 11 up to 15. A local server setup is described below. Furthermore, the `arcadedb` module requires `curl` for the HTTP requests: * [curl](http://curl.se) during runtime, and imports the `uri-common` egg to url-encode strings, as well as the `medea` egg to decode JSON: * [uri-common](https://wiki.call-cc.org/eggref/5/uri-common) * [medea](https://wiki.call-cc.org/eggref/5/medea) ## Local Server Setup A local **ArcadeDB** server can be set up via [install](#install) or [container](#container). ### Install 1. Download package: [**ArcadeDB** package](https://github.com/ArcadeData/arcadedb/releases/latest) 2. Extract package: `tar -xf arcadedb-latest.tar.gz` 3. Start server: `bin/server.sh -Darcadedb.server.rootPassword=mypassword &` 4. Exit server: ``kill `cat bin/arcade.pid` `` ### Container 0. Install [Docker](https://www.docker.com/) 1. Download container: `docker pull arcadedata/arcadedb` 2. Start container: `docker run --rm -d -p 2480:2480 -e JAVA_OPTS="-Darcadedb.server.rootPassword=mypassword --name arcadedb0 arcadedata/arcadedb` 3. Stop container: `docker stop arcadedb0` ## Procedures ### Help Message #### a-help ``` (a-help) ``` Returns **void**, prints help about using the `arcadedb` module. ### Server Connection #### a-connect ``` (a-connect user pass host . port) ``` Returns **alist** with single entry if connection to server using **string**s `user`, `pass`, `host`, and optionally **number** `port`, succeded; returns `#f` if a server error occurs or no response is received. ### Server Information #### a-ready? ``` (a-ready?) ``` Returns **boolean** answering if server is ready. #### a-version ``` (a-version) ``` Returns **string** version number of the server; returns `#f` if a server error occurs or no response is received. ### Server Databases #### a-list ``` (a-list) ``` Returns **list** of **symbol**s holding available databases of the server; returns `#f` if a server error occurs or no response is received. #### a-exist? ``` (a-exist? db) ``` Returns **boolean** answering if database **symbol** `db` exists on the server. ### Database Management #### a-new ``` (a-new db) ``` Returns **boolean** that is true if creating new database **symbol** `db` succeded; returns `#f` if a server error occurs or no response is received. #### a-delete ``` (a-delete db) ``` Returns **boolean** that is true if deleting database **symbol** `db` succeded; returns `#f` if a server error occurs or no response is received. ### Database Connection #### a-use ``` (a-use db) ``` Returns **boolean** that is true if database **symbol** `db` is connected; returns `#f` if a server error occurs or no response is received. #### a-using ``` (a-using) ``` Returns **symbol** naming current database; returns `#f` if no database is connected. ### Database Interaction #### a-query ``` (a-query lang query) ``` Returns **list** holding the result of **string** `query` in language **symbol** `lang` on current database; returns `#f` if a server error occurs or no response is received. #### a-command ``` (a-command lang cmd) ``` Returns **list** holding the result of **string** `cmd` in language **symbol** `lang` on current database; returns `#f` if a server error occurs or no response is received. ### Database Macros #### a-schema ``` (a-schema) ``` Returns **alist** of type descriptions for current database; returns `#f` if a server error occurs or no response is received. This function emulates the SQL `DESCRIBE` statement. #### a-script ``` (a-script path) ``` Returns **list** holding the result of the last statement of SQL script in **string** `path` executed on current database; returns `#f` if a server error occurs or no response is received. A SQL script file has to have the file extension `.sql`. #### a-upload ``` (a-upload path type) ``` Returns **boolean** that is true if uploading _JSON_ file at **string** `path` into current database as **symbol** `type` succeded; returns `#f` if a server error occurs or no response is received. A JSON script file has to have the file extension `.json`. #### a-backup ``` (a-backup) ``` Returns **boolean** that is true if backing-up current database succeded. #### a-extract ``` (a-extract url) ``` **boolean** that is true if importing from **string** `url` into current database succeded; returns `#f` if a server error occurs or no response is received. This function can be a minimalistic ETL (Extract-Transform-Load) tool: If one needs to import data from another database with a HTTP API and the query can be encoded ([as for **ArcadeDB**](https://docs.arcadedb.com/#HTTP-API)) in the URL, the extraction and transformation is performed in the remote query, while the loading corresponds to the import of the query result. The supported formats are [OrientDB, Neo4J, GraphML, GraphSON, XML, CSV, JSON, RDF](https://docs.arcadedb.com/#Importer). #### a-stats ``` (a-stats) ``` Returns **list**-of-**alist**s reporting statistics on current database; returns `#f` if a server error occurs or no response is received. #### a-health ``` (a-health) ``` Returns **list**-of-**alist**s reporting health of current database; returns `#f` if a server error occurs or no response is received. #### a-repair ``` (a-repair) ``` Returns **boolean** that is true if automatic repair succeeded. #### a-comment ``` (a-comment) (a-comment msg) ``` Returns **string** current database comment of current database, if `msg` is not passed; returns `#t` if setting **string** `msg` as comment for current database succeded; returns `#f` if no comment is set, a server error occurs or no response is received. This function emulates the SQL `COMMENT ON DATABASE` statement, by creating a type `D` and upserting or reading the first `comment` property. ## Changelog * `0.1` [Initial Release](https://github.com/gramian/chicken-arcadedb) (2022-11-15) * `0.2` [Minor Update](https://github.com/gramian/chicken-arcadedb) (2022-11-16) * `0.3` [Major Update](https://github.com/gramian/chicken-arcadedb) (2022-12-09) ## License Copyright (c) 2022 _Christian Himpe_ under [zlib-acknowledgement](https://spdx.org/licenses/zlib-acknowledgement.html) license.