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;
; Copyright (C) 2008 Geir Magnusson Jr
;
; Licensed 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.
;
;
; To run:
; $ cd src/examples/clojure
; $ clj # or however you normally start the clojure REPL
; Clojure
; user=> (add-classpath "file:///full/path/to/mongo-driver.jar")
; nil
; user=> (load-file "mongo.clj")
;
(def mongo (org.mongodb.driver.dyn.Mongo.))
(def db (.getDB mongo "clojure"))
(def coll (.getCollection db "test"))
; Erase all records in the collection.
(. coll clear)
; Insert five records.
(dotimes [i 5] (.insert coll {"a" (inc i)}))
; Print the number of records in the collection.
(println "There are" (.getCount coll) "records in the collection 'test'")
; One way to do a query. Note that we turn the returned results into a seq. If
; you don't do that, you won't see all the records because of the way Clojure
; treats iterable objects in Java.
(loop [i (seq (.find coll))]
(when i
(do (println (first i))
(recur (next i)))))
; Another way to perform a query. Again, we turn the results into a seq.
(dorun (map println (seq (.find coll))))
; Yet another way. We don't have to turn the results into a seq manually;
; doseq seems to do that already.
(doseq [i (.find coll)] (println i))
; And yet another. This time you don't have to turn the results into a seq
; manually because we are calling the cursor object's hasNext and next methods
; directly.
(let [cursor (.find coll)]
(while (.hasNext cursor)
(println (.next cursor))))
; Find with select.
(def query {"a" 3})
(dorun (map println (seq (.find coll query))))
(doseq [i (.find coll query)] (println i))