Whats about Fun.Tuple2 in MapDB3

[sheepy]

Hello,
In older MapDB Versions I used the Fun Tuple to build a key - value store where each key can refer to multiple values.

Is there also an option in MapDB3? i can't find the Fun.class anymore

best regards

[Jan Kotek]

Tuples were replaced with tuple arrays. There are examples in btree map:

 

http://www.mapdb/doc/btreemap/

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[Jan Kotek]

Correct link:

http://www.mapdb.org/doc/btreemap/#composite-keys-and-tuples

[sheepy]

thank you, sir!

Am Mittwoch, 4. Mai 2016 21:40:56 UTC+2 schrieb Jan Kotek:

Correct link:

http://www.mapdb.org/doc/btreemap/#composite-keys-and-tuples

 

 

On Wednesday, May 04, 2016 20:00:54 you wrote:

Tuples were replaced with tuple arrays. There are examples in btree map:

 

http://www.mapdb/doc/btreemap/

 

On Tuesday, May 03, 2016 04:52:50 sheepy wrote:

Hello,
In older MapDB Versions I used the Fun Tuple to build a key - value store where each key can refer to multiple values.

Is there also an option in MapDB3? i can't find the Fun.class anymore

best regards

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[sheepy]

Hello,
I've testet the Composite keys on a FileDB from your example:


        DB database = DBMaker.fileDB(filepath.make();   

        BTreeMap<Object[], Integer> map = database.treeMap("towns")
                .keySerializer(new SerializerArrayTuple(
                        Serializer.STRING, Serializer.STRING, Serializer.INTEGER))
                .valueSerializer(Serializer.INTEGER)
                .createOrOpen();
...
After reloading the database, I got the error:
Exception in thread "main" org.mapdb.DBException$NewMapDBFormat: Name Catalog has some new unsupported features: [towns#keySerializer: required parameter not found]
    at org.mapdb.DB.<init>(DB.kt:135)
    at org.mapdb.DB.<init>(DB.kt:37)
    at org.mapdb.DBMaker$Maker.make(DBMaker.kt:426)


is there any fix for it?

[Jan Kotek]

That is fixed in beta3

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