NexJ Studio Tutorial Problems

Problem 1

User root is not recognized,or message likes "Can't find any matching row in the user table"

Solution: Use other account that has sufficient privileges to the new created databases.

Problem 2

Cannot deploy on server, get Error Message: Unknown component "HTTPServer.WSRP" in repository "Training 101".

Solution: Use new version core model and new Eclipse plugin.

Problem 3

It only upgrade the database correctly, but it doesn't upgrade the dump file.

When run recreate, I get error message Error: Version mismatch: dump version http:// www.nexj.com/ns/gwtsample-login#1.15, metadata version http:// www.nexj.com/ns/gwtsample-login#1.16

Solution: Publish a model before create any class, and Upgrade UnitTest dump before upgrade the database.

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Problem 4

Null pointer exception when creating a new class (P. 19) Null pointers randomly throughout use of IDE

Solution: Revert to NexJ Core 7.x.x and do not use 7.1.0 (known issue from previous versions)

Problem 5

Non-matching core files

Solution: Latest versions of NexJ Studio Plugin have Optional JBoss libraries built in. Do not replace with other versions.

Problem 6

Error with Model Browser in Eclipse

Solution: File is "blocked" on Windows 7. Right click on file and click "unblock"

Problem 7

Problem upgrading database

Solution: nexj user not created yet. Create nexj user in mysql database with the appropriate commands. Grant privileges to the nexj user

CREATE USER 'nexj@localhost' IDENTIFIED BY 'nexj';
GRANT CREATE, INSERT, DELETE, UPDATE, SELECT on train101.* to nexj@localhost;
GRANT CREATE, INSERT, DELETE, UPDATE, SELECT on unittest.* to nexj@localhost;

Check with SHOW DATABASES and SHOW TABLES that appropriate tables and databases have been created

Problem 8

"Extra character found after the s-expression (scheme syntax error)"

(define e (Person'new (: firstName "Len") (: lastName "Chan"))) (define tp (read-instance TelcomType '() '(= name "Business") '())) (define telcom (Email'new (: entity e) (: type tp) (: name (tp'name)) (: address "len@nexj.com") (: displayName "Len Chan"))) (commit)

Unresolved