Change Notes item #635435, was opened at 2002-11-08 11:42
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Category: JBossServer
Group: v4.0
Status: Open
Priority: 5
Submitted By: Peter Fagerlund (peter_f)
Assigned to: Nobody/Anonymous (nobody)
Summary: hsqldb 1.7.1 issues
Initial Comment:
The new hsqldb.jar is vanilla distro with a commented out //
System.exit() in method windowClosing() in file
org.hsqldb.util.DatabaseManagerSwing
Configuration changes includes 2 new fields in our MBean
definition as can be seen for ex. in the hsqldb-ds.xml file.
<attribute name="No_system_exit">true</attribute>
Is 1.7.x configuration property for embedding
<attribute name="Persist">true</attribute>
Is a new flag with default set to true together with <connection-
url>jdbc:hsqldb:hsql://localhost:1710</connection-url>
meaning We will start an instance of the org.hsqldb.Server class
in a thread as usual. If set to false together with <connection-url>
jdbc:hsqldb:hsql:.</connection-url> We will run hsqldb without the
server instance above, and We will not be persistent over
invocations. Set to false means running without Sockets so
hsqldb are only visible for other components inside the VM, also
hsqldb are not writing out to a *.script file. In short persist == false
means We are running without a threaded hsqldb server instance,
no sockets and no files, therefore no persistence over
invocations. Great when testing ...
"~Well~" that is what is supposed to happen in teori, in practise
there is some issues running with persist false mentioned in the
hsqldb documentation.
*** Start hsqldb docu
In-Memory
URL format: jdbc:hsqldb:.
No persistence. An applet, for example, could have his very own
database running in his memory. There is no daemon. Database
uses no network resources.
For some reason, with in-memory database ".", sometimes you
get default data and sometimes you don't. You get the data with
QueryTool on the command-line, and with DatabaseManager from
Applet. Otherwise you get an empty database. file:/path/
to.file.html)
*** End hsqldb docu
huh ...
So now when running as persist == false We end up with the *
.script file in {JBOSS_HOME_DISTRO}/bin instead, and We do
persist over invocations ... hmmm ... very confusing ... hehe ... let
me get back to You after I asked for advise from the hsqldb team.
/peter_f
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