CODEWITHSUNDEEP
hsqldbin-memory-database
rogerdpack
rogerdpack

Reputation: 66951

HSQLDB how to have multiple in memory databases

For instance, for each unit test I'd like to have a "different" database to use, but within the same JVM.

Upvotes: 0

Views: 1400

Answers (1)

rogerdpack
rogerdpack

Reputation: 66951

Appears that the "first time" you create an HSQL in-memory database, that becomes the "canonical" password:

String DB_CONNECTION_STR = "jdbc:hsqldb:mem:MySpecialTestDb"; 
String DB_USERNAME_STR = "sa";
String DB_USERNAME_PASSWORD = "";
DriverManager.getConnection(DB_CONNECTION_STR, DB_USERNAME_STR, DB_USERNAME_PASSWORD);

after this point, if you create a new connection to jdbc:hsqldb:mem:MySpecialTestDb it will connect to the same DB (and you'll need that same username and password unless you've run some privilege granting within it). So to create a second DB, just specify a different name, and/or password:

String DB_CONNECTION_STR = "jdbc:hsqldb:mem:AnotherTestDb"; 
String DB_USERNAME_STR = "sa"; // could use different here, doesn't matter
String DB_USERNAME_PASSWORD = "";
DriverManager.getConnection(DB_CONNECTION_STR, DB_USERNAME_STR, DB_USERNAME_PASSWORD);

and it will effectively create a new in memory database for you.

See also https://stackoverflow.com/a/23544323/32453

Upvotes: 1

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