not possible to do bulk insert in Java?

[Robbie Cheng]

we don't find any easy way to do bulk insert in java. We got BsonList
only supports numberic key when we try to do bulk insert. Then, we
tried to inherit from BsonObject, and stores a map inside that class.
But, in the end, what we get from the result is that it 'still'
generates _id as ObjectId even we define the key ourselves already.
ex:
{ "_id" : ObjectId("4e6f537e414ecb46a329e2d8"), "fbb705d066df59a1" :

our manually configured uuid is somehow ignored.

Thanks,

[Richard Kreuter]

The Java driver does a bulk insert when called with a List<DBObject>.
See:

http://api.mongodb.org/java/2.6.5/com/mongodb/DBCollection.html#insert(java.util.List)

http://api.mongodb.org/java/2.6.5/com/mongodb/DBCollection.html#insert(java.util.List,%20com.mongodb.WriteConcern)

Regards,
Richard

[Scott Hernandez]

There are various ways to do bulk/batch inserts using the java driver.
Here are some of the the methods:
http://api.mongodb.org/java/current/com/mongodb/DBCollection.html#insert(java.util.List)
http://api.mongodb.org/java/current/com/mongodb/DBCollection.html#insert(com.mongodb.DBObject...)

Here is a sample unit test which does this:
https://github.com/mongodb/mongo-java-driver/blob/master/src/test/com/mongodb/JavaClientTest.java#L634

If you follow the Java Tutorial you will see that you use
(Basic)DBObject instances not the BSONObject class when working with
the database. The BSON stuff is just for low-level encoding/decoding.
http://www.mongodb.org/display/DOCS/Java+Tutorial

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[Robbie Cheng]

Thanks for your reply.
In fact, we're using save() instead of insert() which only accepts
BasicDBList which is a subclass of BasicBsonList.

here is our code snippet:

BasicDBList persons = new BasicDBList();
for (HashMap<String, Object> person : list){
BasicDBObject object = new BasicDBObject(person);
persons.add(object);
}
coll.save(persons);

exception:
java.lang.IllegalArgumentException: BasicBSONList can only work with
numeric keys, not: [_id]
at org.bson.types.BasicBSONList._getInt(BasicBSONList.java:161)
at org.bson.types.BasicBSONList._getInt(BasicBSONList.java:152)
at org.bson.types.BasicBSONList.get(BasicBSONList.java:104)
at com.mongodb.DBCollection.save(DBCollection.java:625)
at com.mongodb.DBCollection.save(DBCollection.java:608)

Thanks,

On Sep 13, 11:06 pm, Scott Hernandez <scotthernan...@gmail.com> wrote:
> There are various ways to dobulk/batch inserts using thejavadriver.

> Here are some of the the methods:http://api.mongodb.org/java/current/com/mongodb/DBCollection.html#ins...)http://api.mongodb.org/java/current/com/mongodb/DBCollection.html#ins......)
>
> Here is a sample unit test which does this:https://github.com/mongodb/mongo-java-driver/blob/master/src/test/com...
>
> If you follow theJavaTutorial you will see that you use

> (Basic)DBObject instances not the BSONObject class when working with

> the database. The BSON stuff is just for low-level encoding/decoding.http://www.mongodb.org/display/DOCS/Java+Tutorial
>
>
>
>
>
>
>
> On Tue, Sep 13, 2011 at 7:15 AM, Robbie Cheng <robbiech...@gmail.com> wrote:
> > we don't find any easy way to dobulkinsertinjava. We got BsonList
> > only supports numberic key when we try to dobulkinsert. Then, we

[Scott Hernandez]

Save doesn't take a list, but only a single document. Save only saves one single dociment at a time.

http://api.mongodb.org/java/current/com/mongodb/DBCollection.html#save(com.mongodb.DBObject)