jrobin RrdCommander()

2 messages

jrobin RrdCommander()

Reply Threaded

Does anyone have a working example of using the graph command in
jrobin's RrdCommander? I keep getting NullPointerExceptions in
ParseDef when trying to make my own graph from CpuRawUser.

java -cp /opt/opennms/lib/jrobin-1.5.9.jar -Djava.awt.headless=true
org.jrobin.cmd.RrdCommander
== JRobin's RRDTool commander ==
Type a RRDTool command after the dollar sign and press Enter.
Start your RRDTool command with 'create', 'update', 'fetch' etc.
Start line with 'create', 'update', 'fetch' etc.
Enter dot ('.') to bail out
Current directory is: /local/home/sporlem
================================
$ graph cpu.png DEF:CpuRawUser=./CpuRawUsr.jrb:CpuRawUser:AVERAGE
AREA:CpuRawUser#0000FF:CPU
java.lang.NullPointerException
at org.jrobin.cmd.RrdGraphCmd.parseDef(RrdGraphCmd.java:325)
at org.jrobin.cmd.RrdGraphCmd.getGraphDef(RrdGraphCmd.java:196)
at org.jrobin.cmd.RrdGraphCmd.execute(RrdGraphCmd.java:47)
at org.jrobin.cmd.RrdToolCmd.executeCommand(RrdToolCmd.java:45)
at org.jrobin.cmd.RrdCommander.execute(RrdCommander.java:134)
at org.jrobin.cmd.RrdCommander.main(RrdCommander.java:162)
$

Any hints?

Thanks,
Matt

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matthew sporleder

Re: jrobin RrdCommander()

Reply Threaded

I thought I would give this one more try. Does anyone have any
experience with jrobin? It feels like "gdef" is what's actually null
since the error is here:
gdef.datasource(tokens2[0], tokens2[1], tokens1[2], tokens1[3]);
And according to jdb tokens1 and tokens2 are fully populated.

On Fri, Nov 6, 2009 at 8:55 PM, matthew sporleder <[hidden email]> wrote:

> Does anyone have a working example of using the graph command in
> jrobin's RrdCommander? I keep getting NullPointerExceptions in
> ParseDef when trying to make my own graph from CpuRawUser.
>
> java -cp /opt/opennms/lib/jrobin-1.5.9.jar -Djava.awt.headless=true
> org.jrobin.cmd.RrdCommander
> == JRobin's RRDTool commander ==
> Type a RRDTool command after the dollar sign and press Enter.
> Start your RRDTool command with 'create', 'update', 'fetch' etc.
> Start line with 'create', 'update', 'fetch' etc.
> Enter dot ('.') to bail out
> Current directory is: /local/home/sporlem
> ================================
> $ graph cpu.png DEF:CpuRawUser=./CpuRawUsr.jrb:CpuRawUser:AVERAGE
> AREA:CpuRawUser#0000FF:CPU
> java.lang.NullPointerException
> at org.jrobin.cmd.RrdGraphCmd.parseDef(RrdGraphCmd.java:325)
> at org.jrobin.cmd.RrdGraphCmd.getGraphDef(RrdGraphCmd.java:196)
> at org.jrobin.cmd.RrdGraphCmd.execute(RrdGraphCmd.java:47)
> at org.jrobin.cmd.RrdToolCmd.executeCommand(RrdToolCmd.java:45)
> at org.jrobin.cmd.RrdCommander.execute(RrdCommander.java:134)
> at org.jrobin.cmd.RrdCommander.main(RrdCommander.java:162)
> $
>
> Any hints?
>
> Thanks,
> Matt
>

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