Store large amounts of data in RMS

Question

I need to store large amount of data using RMS API through J2ME.

How can I store that multiple-column data, given they must be hardcoded so I need to store those multiple columns and rows data.

How can I do this in this, should I use structs?

please choose a more descriptive headline! – Nov 25 '08 at 18:12 — , Nov 25 '08 at 18:12

score 2 · Answer 1 · answered Nov 24 '08 at 13:45

Well, RMS only allows you to store records that are arrays of bytes. You will have to decide for yourself how a record is stored, and if you want to store your data in a single or in multiple records. If you use the DataInputStream and DataOutputStream classes, you'll be able to read/write Strings, booleans, integers, etc. The API documentation includes a decent example of how you can do this.

If you have complex data to store, or a lot of different objects, you may want to create a simple library for RMS I/O, that allows you to pass objects implementing e.g. "Storable" to a library class that writes away your object into RMS.

score 2 · Answer 2 · edited May 23 '17 at 12:33

2

See my question on exacty the same topic. In the end we bought a commercial BTree imeplementation and extended it to work across multiple record stores.

edited May 23 '17 at 12:33

Community

1
1

answered Nov 29 '08 at 01:12

roryf

29,592
16
81
103

score 1 · Answer 3 · answered Nov 25 '08 at 18:04

Has Jeroen said RMS is quite basic. You can only store arrays of bytes. But, though it's basic, it's quite easy implement a more complex memory structure with an index stored in a record store and addressing other record stores containing data.

Have a look to this page : Understanding the Record Management System

Store large amounts of data in RMS

3 Answers3