Clojure的嵌入式（纯Java）数据库

Question

I'm in need for an embedded database for a Clojure application. Maybe it's the same criteria as for any other Java application but I rather get some other people's opinion anyway. I'm not picking SQLite because that's not pure Java so distribution of a standalone application gets much more complex. It seems the way to go is Apache Derby. Anything else I should consider?

Answer 1

Without a doubt, H2

Here are the settings,

 (def demo-settings
   {
    :classname   "org.h2.Driver"
    :subprotocol "h2:file"
    :subname     (str (System/getProperty "user.dir") "/" "demo")
    :user        "sa"
    :password    ""
   }
  )

And then the usual Clojure SQL code:

  (with-connection demo-settings 
    (create-table :DEMO_TABLE
           [:M_LABEL "varchar(120)"]
           [:M_DATE "varchar(120)"]
           [:M_COMMENT "varchar(32)"]))

Answer 2

Have you looked at FleetDB ? It's a Clojure database with a JSON protocol and clients in several languages. I suspect you could probably run it embedded without working too hard at it.

Answer 3

h2

oracle Berkley DB

Answer 4

I used an embedded database, H2 within clojure and used clojureQL to access it. Be warned though that since the database is in process you should not use this for large amounts of records (> than 10,000s in a single table) as you will get huge performance problems as the database and your code will both be sharing the same JVM

Answer 5

我认为Derby是一个出色的100％Java嵌入式数据库，它对各种各样的应用程序非常有用，由活跃的社区维护得很好，并且有很好的文档记录。

Answer 6

我正在使用https://github.com/clojurewerkz/archimedes ，它允许您稍后指定后端。

Answer 7

If you don't mind NOSQL, neo4j is an embeddable graph db with transactions, licensed under the GPL. The most up to date bindings I've found are https://github.com/hgavin/borneo

There is also an interesting graph db project in clojure with pluggable backends: https://github.com/flatland/jiraph

The still quite young but promising looking OrientDB might be worth a look: http://www.orientechnologies.com/orient-db.htm

http://github.com/eduardoejp/clj-orient

Then there's http://jdbm.sourceforge.net/

Answer 8

另一个需要考虑的选择是键值存储Chronicle Map ，因为它是纯Java并提供了一个vanilla Java Map接口，因此使用Clojure时使用它应该非常简单。