To be clear, Cassandra triggers require that you be a skilled and confident
Java developer. If you aren't fluent in Java and the Java development
process, triggers are not a great place to start learning Java.
That said, maybe the doc does need to be a little more clear about some of
the specifics.
-- Jack Krupansky
-----Original Message-----
From: Michael Dykman
Sent: Monday, July 28, 2014 10:35 AM
To: Cassandra Users
Subject: Re: Cassandra trigger following the CQL for Cassandra 2.0 tutorial
does not work
How to compile is a much biggest question and probably way off topic
for this list. I think you need a starter tutorial on building and
packaing java; there is more than one concept at work.
you will need a compiler of the appropriate version. that source has
external dependancies declared in the imports from these packages:
org.apache.cassandra.io
org.apache.cassandra.db
org.slf4j
The rest of the import are internal to Java's standard library.
I think you need to master the art of building and running a jar
before you can reasonably hope to be playing with cassandra triggers.
On Mon, Jul 28, 2014 at 10:15 AM, Martin Marinov
<martin.mari...@securax.org> wrote:
I'm not compiling it.
I just download it from:
https://git-wip-us.apache.org/repos/asf?p=cassandra.git;a=blob_plain;f=examples/triggers/src/org/apache/cassandra/triggers/InvertedIndex.java;hb=HEAD
Save the downloaded file into a .class file and jar it.
How do I compile it ?
On 07/28/2014 05:11 PM, Michael Dykman wrote:
This is not really a Cassandra problem: it's a basic Java packaging
problem.
First of all, the java source file is not what the runtime needs to
see in your jar; it needs the class file which was generated by
compiling it. That compiled class needs to be in a folder
corresponding to it's package, which I infer is
'org.apache.cassandra.triggers' from your earlier jar creation command
(obviously not the command you used to create the jar you just showed
us the dump of):
jar cvf
/etc/cassandra/triggers/org.apache.cassandra.triggers.InvertedIndex.jar
org.apache.cassandra.triggers.InvertedIndex.class
The META-INF looks fine, but that class should be listed as
org/apache/cassandfra/triggers/InvertedIndex.class
When you compile the source, does the compiler NOT put the binary in
an appropriate folder?
On Mon, Jul 28, 2014 at 9:04 AM, Martin Marinov
<martin.mari...@securax.org> wrote:
Correction.
It's:
unzip -l /etc/cassandra/triggers/InvertedIndex.jar
Archive: /etc/cassandra/triggers/InvertedIndex.jar
Length Date Time Name
--------- ---------- ----- ----
0 2014-07-25 10:07 META-INF/
68 2014-07-25 10:07 META-INF/MANIFEST.MF
2761 2014-07-25 10:07 InvertedIndex.java
--------- -------
2829 3 files
On 07/28/2014 04:02 PM, Martin Marinov wrote:
The output is:
unzip /etc/cassandra/triggers/InvertedIndex.jar
Archive: /etc/cassandra/triggers/InvertedIndex.jar
creating: META-INF/
inflating: META-INF/MANIFEST.MF
inflating: InvertedIndex.java
On 07/28/2014 03:54 PM, Michael Dykman wrote:
I wonder; your jar creation looks a little off and I suspect your
problem
might be the jar format which would lead to the failure to load. Could
you
list the output of
$ unzip -l my.jar?
On Jul 28, 2014 3:49 AM, "Martin Marinov" <martin.mari...@securax.org>
wrote:
I did:
ls /etc/cassandra/triggers/
InvertedIndex.jar README.txt
But I'm not sure I'm creating the jar correctly.
I'm running:
jar cvf
/etc/cassandra/triggers/org.apache.cassandra.triggers.InvertedIndex.jar
org.apache.cassandra.triggers.InvertedIndex.class
where org.apache.cassandra.triggers.InvertedIndex.class contains the
java
code on this url:
https://git-wip-us.apache.org/repos/asf?p=cassandra.git;a=blob_plain;f=examples/triggers/src/org/apache/cassandra/triggers/InvertedIndex.java;hb=HEAD
Also I tried with the name of the .class file and the .jar file as:
InvertedIndex.jar, InvertedIndex.class
and as
org.apache.cassandra.triggers.InvertedIndex.jar,
org.apache.cassandra.triggers.InvertedIndex.class
On 07/28/2014 10:43 AM, DuyHai Doan wrote:
Did you put the jar into the /lib folder on the server ? I know it's a
basic question but it's the first idea to come in mind
On Mon, Jul 28, 2014 at 9:36 AM, Martin Marinov
<martin.mari...@securax.org> wrote:
Anybody got an idea on this matter ?
On 07/24/2014 06:34 PM, Martin Marinov wrote:
Hi,
I posted the question on stackoverflow:
http://stackoverflow.com/questions/24937425/cassandra-trigger-following-the-cql-for-cassandra-2-0-tutorial-does-not-work
On 07/24/2014 06:25 PM, Martin Marinov wrote:
Hi,
I'm following the tutorial at:
http://www.datastax.com/documentation/cql/3.1/cql/cql_reference/trigger_r.html
I'm using Cassandra 2.0.9 with Oracle Java (java version "1.7.0_60").
I have downloaded the example Java Class from
https://git-wip-us.apache.org/repos/asf?p=cassandra.git;a=blob_plain;f=examples/triggers/src/org/apache/cassandra/triggers/InvertedIndex.java;hb=HEAD
into a file named org.apache.cassandra.triggers.InvertedIndex.jar .
I then created a jar using:
jar cvf
/etc/cassandra/triggers/org.apache.cassandra.triggers.InvertedIndex.jar
org.apache.cassandra.triggers.InvertedIndex.class
I restarted the cassandra service.
The trigger does not exist:
cqlsh:mykeyspace> CREATE TRIGGER myTrigger ON myTable USING
'org.apache.cassandra.triggers.InvertedIndex';
Bad Request: Trigger class
'org.apache.cassandra.triggers.InvertedIndex'
doesn't exist
What am I doing wrong ?
--
Best Regards,
Martin Marinov
Securax LTD
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Securax LTD
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Securax LTD
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Martin Marinov
Securax LTD
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May the Source be with you.
