├── .gitignore ├── CHANGELOG.md ├── LICENSE ├── README.md ├── doc └── intro.md ├── project.clj ├── src └── clj_lmdb │ ├── core.clj │ └── simple.clj └── test └── clj_lmdb └── simple_test.clj /.gitignore: -------------------------------------------------------------------------------- 1 | /target 2 | /classes 3 | /checkouts 4 | pom.xml 5 | pom.xml.asc 6 | *.jar 7 | *.class 8 | /.lein-* 9 | /.nrepl-port 10 | .hgignore 11 | .hg/ 12 | -------------------------------------------------------------------------------- /CHANGELOG.md: -------------------------------------------------------------------------------- 1 | # Change Log 2 | All notable changes to this project will be documented in this file. This change log follows the conventions of [keepachangelog.com](http://keepachangelog.com/). 3 | 4 | ## [Unreleased][unreleased] 5 | ### Changed 6 | - Add a new arity to `make-widget-async` to provide a different widget shape. 7 | 8 | ## [0.1.1] - 2016-03-01 9 | ### Changed 10 | - Documentation on how to make the widgets. 11 | 12 | ### Removed 13 | - `make-widget-sync` - we're all async, all the time. 14 | 15 | ### Fixed 16 | - Fixed widget maker to keep working when daylight savings switches over. 17 | 18 | ## 0.1.0 - 2016-03-01 19 | ### Added 20 | - Files from the new template. 21 | - Widget maker public API - `make-widget-sync`. 22 | 23 | [unreleased]: https://github.com/your-name/clj-lmdb/compare/0.1.1...HEAD 24 | [0.1.1]: https://github.com/your-name/clj-lmdb/compare/0.1.0...0.1.1 25 | -------------------------------------------------------------------------------- /LICENSE: -------------------------------------------------------------------------------- 1 | THE ACCOMPANYING PROGRAM IS PROVIDED UNDER THE TERMS OF THIS ECLIPSE PUBLIC 2 | LICENSE ("AGREEMENT"). 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No party to this 212 | Agreement will bring a legal action under this Agreement more than one year 213 | after the cause of action arose. Each party waives its rights to a jury trial 214 | in any resulting litigation. 215 | -------------------------------------------------------------------------------- /README.md: -------------------------------------------------------------------------------- 1 | # clj-lmdb 2 | 3 | [![Circle CI](https://circleci.com/gh/shriphani/clj-lmdb.svg?style=shield&circle-token=3ac09ef4532f9b7665baad776d399bcc58873338)](https://circleci.com/gh/shriphani/clj-lmdb) 4 | 5 | Clojure wrappers for lmdb - the best no-nonsense, no-surprise, fast key-value store. 6 | 7 | ## Usage 8 | 9 | 10 | [![Clojars Project](https://img.shields.io/clojars/v/clj-lmdb.svg)](https://clojars.org/clj-lmdb) 11 | 12 | ### Creating a database 13 | 14 | `make-db` 15 | 16 | ```clojure 17 | (use 'clj-lmdb.simple :reload) 18 | nil 19 | user> (def db (make-db "/tmp")) 20 | #'user/db 21 | ``` 22 | 23 | You can specify the max memory map size as well: 24 | 25 | ```clojure 26 | (use 'clj-lmdb.core :reload) 27 | nil 28 | user> (def db (make-db "/tmp" )) 29 | #'user/db 30 | ``` 31 | 32 | 33 | ### Inserting/Retrieving Values 34 | 35 | `get!` and `put!` 36 | 37 | ```clojure 38 | user> (put! db "foo" "bar") 39 | nil 40 | user> (get! db "foo") 41 | "bar" 42 | user> 43 | ``` 44 | 45 | ### Deleting Values 46 | 47 | `delete!` 48 | 49 | ```clojure 50 | user> (delete! db "foo") 51 | true 52 | user> (get! db "foo") 53 | nil 54 | user> 55 | ``` 56 | 57 | ### Transactions: 58 | 59 | `read-txn` to create a read-only transaction 60 | 61 | `write-txn` to create a transaction that updates the db 62 | 63 | This inserts a couple of entries: 64 | 65 | ```clojure 66 | (with-txn [txn (write-txn db)] 67 | (put! db 68 | txn 69 | "foo" 70 | "bar") 71 | (put! db 72 | txn 73 | "foo1" 74 | "bar1")) 75 | ``` 76 | 77 | This retrieves them 78 | 79 | ```clojure 80 | (with-txn [txn (read-txn db)] 81 | (= (get! db 82 | txn 83 | "foo") 84 | "bar") ; true 85 | 86 | (= (get! db 87 | txn 88 | "foo1") 89 | "bar1")) ; true 90 | ``` 91 | 92 | ### Iterating through entries: 93 | 94 | Inside a read-transaction you can use `items` or `items-from` 95 | to iterate over the entries or to iterate from a particular key onwards. 96 | 97 | ```clojure 98 | (with-txn [txn (read-txn db)] 99 | (count 100 | (doall 101 | (map 102 | (fn [[k v]] 103 | ...) 104 | (items db txn))))) 105 | ``` 106 | 107 | ```clojure 108 | (with-txn [txn (read-txn db)] 109 | (count 110 | (doall 111 | (map 112 | (fn [[k v]] 113 | ...) 114 | (items-from db txn "foo"))))) 115 | ``` 116 | 117 | For more examples, see the [tests](test/clj_lmdb/simple_test.clj) 118 | 119 | ## LICENSE 120 | 121 | Copyright © 2016 Shriphani Palakodety 122 | 123 | Distributed under the Eclipse Public License either version 1.0 or (at your option) any later version. 124 | -------------------------------------------------------------------------------- /doc/intro.md: -------------------------------------------------------------------------------- 1 | # Introduction to clj-lmdb 2 | 3 | TODO: write [great documentation](http://jacobian.org/writing/what-to-write/) 4 | -------------------------------------------------------------------------------- /project.clj: -------------------------------------------------------------------------------- 1 | (defproject clj-lmdb "0.2.4" 2 | :description "Clojure bindings for lmdb" 3 | :url "http://github.com/shriphani/clj-lmdb" 4 | :license {:name "Eclipse Public License" 5 | :url "http://www.eclipse.org/legal/epl-v10.html"} 6 | :dependencies [[org.clojure/clojure "1.8.0"] 7 | [org.deephacks.lmdbjni/lmdbjni "0.4.6"] 8 | [org.deephacks.lmdbjni/lmdbjni-linux64 "0.4.6"] 9 | [org.deephacks.lmdbjni/lmdbjni-win64 "0.4.6"] 10 | [org.deephacks.lmdbjni/lmdbjni-osx64 "0.4.6"]]) 11 | -------------------------------------------------------------------------------- /src/clj_lmdb/core.clj: -------------------------------------------------------------------------------- 1 | (ns clj-lmdb.core 2 | (:import [org.fusesource.lmdbjni Database Env])) 3 | 4 | (defrecord DB [env db]) 5 | 6 | (defrecord NamedDB [env db name]) 7 | 8 | (defrecord Txn [txn type]) 9 | 10 | (defn make-db 11 | "Initialize a new database, optionally specifying *max-size*, in 12 | bytes. By default, the maximum size of the memory map (and thus the 13 | database) is 10485760 bytes." 14 | ([dir-path max-size] 15 | (let [env (doto (Env. dir-path) 16 | (.setMapSize max-size)) 17 | db (.openDatabase env)] 18 | (DB. env db))) 19 | ([dir-path] 20 | (make-db dir-path 10485760))) 21 | 22 | (defn make-named-db 23 | "Create a named database using an env. 24 | Returns a db record you can use with all 25 | the other functions" 26 | ([dir-path name max-size] 27 | (let [env (doto (Env. dir-path) 28 | (.setMapSize max-size)) 29 | db (.openDatabase env name)] 30 | (NamedDB. env 31 | db 32 | name))) 33 | ([dir-path name] 34 | (make-named-db dir-path 35 | name 36 | 10485760))) 37 | 38 | (defn read-txn 39 | [db-record] 40 | (let [env (:env db-record) 41 | txn (.createReadTransaction env)] 42 | (Txn. txn :read))) 43 | 44 | (defn write-txn 45 | [db-record] 46 | (let [env (:env db-record) 47 | txn (.createWriteTransaction env)] 48 | (Txn. txn :write))) 49 | 50 | (defmacro with-txn 51 | [bindings & body] 52 | (cond 53 | (= (count bindings) 0) `(do ~@body) 54 | (symbol? (bindings 0)) `(let ~(subvec bindings 0 2) 55 | (try 56 | (with-txn ~(subvec bindings 2) 57 | ~@body) 58 | (finally 59 | (if (-> ~(bindings 0) 60 | :type 61 | (= :read)) 62 | (-> ~(bindings 0) 63 | :txn 64 | (.abort)) 65 | (-> ~(bindings 0) 66 | :txn 67 | (.commit)))))) 68 | :else (throw (IllegalArgumentException. 69 | "with-open only allows Symbols in bindings")))) 70 | 71 | (defn put! 72 | ([db-record txn k v] 73 | (let [db (:db db-record)] 74 | (.put db 75 | (:txn txn) 76 | k 77 | v))) 78 | 79 | ([db-record k v] 80 | (let [db (:db db-record)] 81 | (.put db 82 | k 83 | v)))) 84 | 85 | (defn get! 86 | ([db-record txn k] 87 | (let [db (:db db-record)] 88 | (.get db 89 | (:txn txn) 90 | k))) 91 | 92 | ([db-record k] 93 | (let [db (:db db-record)] 94 | (.get db 95 | k)))) 96 | 97 | (defn delete! 98 | ([db-record txn k] 99 | (let [db (:db db-record)] 100 | (.delete db 101 | (:txn txn) 102 | k))) 103 | 104 | ([db-record k] 105 | (let [db (:db db-record)] 106 | (.delete db 107 | k)))) 108 | 109 | (defn drop-db! 110 | [named-db-record] 111 | (-> named-db-record 112 | :db 113 | (.drop true))) 114 | 115 | (defn items 116 | [db-record txn] 117 | (let [db (:db db-record) 118 | txn* (:txn txn) 119 | 120 | entries (-> db 121 | (.iterate txn*) 122 | iterator-seq)] 123 | (map 124 | (fn [e] 125 | [(.getKey e) (.getValue e)]) 126 | entries))) 127 | 128 | (defn items-from 129 | [db-record txn from] 130 | (let [db (:db db-record) 131 | txn* (:txn txn) 132 | 133 | entries (-> db 134 | (.seek txn* 135 | from) 136 | iterator-seq)] 137 | (map 138 | (fn [e] 139 | [(.getKey e) (.getValue e)]) 140 | entries))) 141 | 142 | -------------------------------------------------------------------------------- /src/clj_lmdb/simple.clj: -------------------------------------------------------------------------------- 1 | (ns clj-lmdb.simple 2 | (:require [clj-lmdb.core :as core]) 3 | (:import [org.fusesource.lmdbjni Constants])) 4 | 5 | (def make-db core/make-db) 6 | (def make-named-db core/make-named-db) 7 | (def drop-db! core/drop-db!) 8 | (def read-txn core/read-txn) 9 | (def write-txn core/write-txn) 10 | 11 | (defmacro with-txn 12 | [& args] 13 | `(core/with-txn ~@args)) 14 | 15 | (defn put! 16 | ([db-record txn k v] 17 | (core/put! db-record txn (Constants/bytes k) (Constants/bytes v))) 18 | ([db-record k v] 19 | (core/put! db-record (Constants/bytes k) (Constants/bytes v)))) 20 | 21 | (defn get! 22 | ([db-record txn k] 23 | (->> (Constants/bytes k) 24 | (core/get! db-record txn) 25 | (Constants/string))) 26 | ([db-record k] 27 | (->> (Constants/bytes k) 28 | (core/get! db-record) 29 | (Constants/string)))) 30 | 31 | (defn delete! 32 | ([db-record txn k] 33 | (core/delete! db-record txn (Constants/bytes k))) 34 | ([db-record k] 35 | (core/delete! db-record (Constants/bytes k)))) 36 | 37 | (defn items 38 | [db-record txn] 39 | (->> (core/items db-record txn) 40 | (map (fn [[k v]] [(Constants/string k) (Constants/string v)])))) 41 | 42 | (defn items-from 43 | [db-record txn from] 44 | (->> (Constants/bytes from) 45 | (core/items-from db-record txn) 46 | (map (fn [[k v]] [(Constants/string k) (Constants/string v)])))) 47 | 48 | -------------------------------------------------------------------------------- /test/clj_lmdb/simple_test.clj: -------------------------------------------------------------------------------- 1 | (ns clj-lmdb.simple-test 2 | (:require [clojure.test :refer :all] 3 | [clj-lmdb.simple :refer :all])) 4 | 5 | (deftest non-txn-test 6 | (testing "Put + get without using a txn" 7 | (let [db (make-db "/tmp")] 8 | (put! db 9 | "foo" 10 | "bar") 11 | (is 12 | (= (get! db 13 | "foo") 14 | "bar")) 15 | 16 | (delete! db "foo") 17 | 18 | (is 19 | (nil? 20 | (get! db "foo")))))) 21 | 22 | (deftest with-txn-test 23 | (testing "Results with a txn" 24 | (let [db (make-db "/tmp")] 25 | (with-txn [txn (write-txn db)] 26 | (put! db 27 | txn 28 | "foo" 29 | "bar") 30 | (put! db 31 | txn 32 | "foo1" 33 | "bar1")) 34 | 35 | (with-txn [txn (read-txn db)] 36 | (is (= (get! db 37 | txn 38 | "foo") 39 | "bar")) 40 | 41 | (is (= (get! db 42 | txn 43 | "foo1") 44 | "bar1"))) 45 | 46 | (delete! db "foo") 47 | (delete! db "foo1")))) 48 | 49 | (deftest iteration-test 50 | (testing "Iteration" 51 | (let [db (make-db "/tmp")] 52 | (with-txn [txn (write-txn db)] 53 | (doall 54 | (map 55 | (fn [i] 56 | (put! db txn (str i) (str i))) 57 | (range 1000)))) 58 | 59 | (with-txn [txn (read-txn db)] 60 | (let [num-items (count 61 | (doall 62 | (map 63 | (fn [[k v]] 64 | (is (= k v)) 65 | [k v]) 66 | (items db txn))))] 67 | (is (= num-items 1000)))) 68 | 69 | (with-txn [txn (read-txn db)] 70 | (let [num-items (count 71 | (doall 72 | (map 73 | (fn [[k v]] 74 | (is (= k v)) 75 | [k v]) 76 | (items-from db txn "500"))))] 77 | (is (= num-items 553)))) ; items are sorted in alphabetical order - not numerical 78 | 79 | (with-txn [txn (write-txn db)] 80 | (doall 81 | (map 82 | #(->> % 83 | str 84 | (delete! db txn)) 85 | (range 1000))) 86 | 87 | (is (= (count (items-from db txn "400")) 88 | 0)))))) 89 | 90 | (deftest named-db-test 91 | (testing "Create multiple databases in a single env." 92 | (let [db-record1 (make-named-db "/tmp" 93 | "db1") 94 | 95 | db-record2 (make-named-db "/tmp" 96 | "db2")] 97 | (put! db-record1 98 | "foo" 99 | "bar") 100 | (put! db-record2 101 | "foo" 102 | "baz") 103 | 104 | (is (= (get! db-record1 105 | "foo") 106 | "bar")) 107 | 108 | (is (= (get! db-record2 109 | "foo") 110 | "baz")) 111 | 112 | (drop-db! db-record1) 113 | (drop-db! db-record2)))) 114 | --------------------------------------------------------------------------------