A beginners guide to DSL writing in Ruby

I wrote an article on writing (external) Domain Specific Languages in Ruby over at the Red Hat Developers Blog.

This is based on my two posts on Computed Metrics for HawkFX and A DSL for alert trigger definitions in Hawkular.

WildFly subsystem for RHQ Metrics

For RHQ-Metrics I have started writing a subsystem for WildFly 8 that is able to collect metrics inside WildFly and then send them at regular intervals (currently every minute) to a RHQ-Metrics server.

The next graph is a visualization with Grafana of the outcome when this sender was running for 1.5 days in a row:

Graphs of JVM memory usageWildFly memory usage

( It is interesting to see how the JVM is fine tuning its memory requirement over time and using less and less memory for this constant workload ).

The following is a visualization of the setup:

Setup

The sender is running as a subsystem inside WildFly and reading metrics from the WildFly management api. The gathered metrics are then pushed via REST to RHQ-Metrics. Of course it is possible to send them to a RHQ-Metrics server that is running on a separate host.

The configuration of the subsystem looks like this:

<subsystem xmlns="urn:org.rhq.metrics:wildflySender:1.0">
    <rhqm-server
        name="localhost"
        enabled="true"
        port="8080"
        token="0x-deaf-beef"/>
    <metric name="non-heap"
        path="/core-service=platform-mbean/type=memory"
        attribute="non-heap-memory-usage"/>
    <metric name="thread-count"
        path="/core-service=platform-mbean/type=threading"
        attribute="thread-count"/>
</subsystem>

As you see, the path to the DMR resource and the name of the attribute to be monitored as metrics can be given in the configuration.

The implementation is still basic at the moment - you can find the source code in the RHQ-Metrics repository on GitHub. Contributions are very welcome.

Heiko Braun and Harald Pehl are currently working on optimizing the scheduling with individual intervals and possible batching of requests for managed servers in a domain.

Many thanks go to Emmanuel Hugonnet, Kabir Khan and especially Tom Cerar for their help to get me going with writing a subsystem, which was pretty tricky for me. The parsers, the object model and the XML had a big tendency to disagree with each other :-)

RHQ and JBoss ON at Summit 2014

I was very fortunate to be able to attend this years Red Hat Summit in San Francisco.

Right before Summit, the accompanying DevNation conference already started on Sunday with some pretty interesting talks - among others about Fabric8 and Hawt.io.

As both Summit and DevNation happened at Moscone center, it was pretty easy to mix and match sessions. Dev Nation also featured a "hack area": some tables that had huge power strips in the middle to easily connect laptop and smartphone chargers. And usually the table were not as empty as on the next image:

I also met at one of those tables with Matze Wessendorf from the Aerogears team and we developed together an Alert Sender plugin for RHQ, that uses the Unified Push Sender to directly bring alerts from RHQ to the lock screen of the admins phones. The plugin only exists in private git at the moment. We need to do some polishing and remove some passwords before pushing to rhq git.

Summit presentation
Thomas Segismont and I did a presentation "What is new with JBoss ON" and we also had a BOF session later on.
The presentation ran well with around 60 attendees. Most of the audience already knew JBoss ON.
Of those around 2/3 are running 3.1, a few 3.2 and one person was even on 3.0 (unfortunately I was not able to find him later to find out why)

The slides of the presentation are already available online; unfortunately they do not cover the two live demos from Thomas, showing how to add a new Storage Node and how to make use of the new bundle permissions that were introduced in JBoss ON 3.2 (and also RHQ).

Thomas at work and me doing a bit of talking.

BOF

The BOF/Meet and Greet session later was also quite well attended.
People had good questions and ideas and we were talking a bit about roadmap and also about some vision wrt. JBoss ON 4. Unfortunately we got kicked out the room much too early.

OCSystems
Thomas and I also had the luck to be invited by OCSystems, the makers of RTI that also runs on top of JBoss ON for a dinner at the Waterfront restaurant, from where we had an excellent view on to the bay bridge:

Front row: Alan Santos, myself, Thomas Segismont

Middle: Tobias Hartwig, Bill Critch, all Red Hat

Behind: Steve North, Georgia Ferretti, both OCSystems

Hackathon

And last but not least at the Dev Nation Hackathon, Team "RHQ" won the 2nd prize with some "home automation":
a RaspberryPI running the agent had an LED blinking and we had also one of the MBed boards (Those are developer boards a little like Arduino but with an ARM cpu and sensors + an LCD on board)
connected to read in sensor data; unfortunately I lost some time at the start of the hackathon,
so we could not really use that info in the plugin; 1/2h more time and ... :-)
For the 2nd half of this, Thomas has built a Cordova application for his Android phone and showed how to receive push messages that were sent when alerts are fired with the brand new aerogear-ups alert sender plugin mentioned above.

I should have taken a photo of all the wiring we had set up, but totally forgot
about it.

I will re-create / finish this demo and blog about it

Running the RHQ-agent on a Raspberry PI [updated]

I finally got a Raspberry Pi too. After the hurdles of initial installation, got it hooked up to my LAN and of course I had to install an RHQ agent on it.

And it turned out that this was dead simple, as the Pi already has Java 1.7 installed (in the Raspbian Wheezy distro that I am using). Thus it was only a matter of laying down the rhq-agent, and starting it the usual way.

Now there was one caveat: the agent did not find any file systems or network interfaces etc. This is due to the fact that there is no native library for Sigar on arm v6 cpus supplied with the agent.

I cloned Sigar from its git repository, changed into the 1.6 branch and built that library myself.

Now after dropping libsigar-arm-linux.so into the agent's lib/ directory, the native library is available and on agent restart all the native stuff could be found.

(Platform details in RHQ)

If you don't want to compile that library yourself, you can take my version from https://sourceforge.net/projects/rhq/files/rhq/misc/.

I will try to get that library into the upcoming RHQ 4.10 release, but can't promise anything.

Update

If you run the agent from current master (or upcoming RHQ 4.10), you can configure a list of plugins to be enabled, so that the agent only uses these plugins (and thus uses less memory and starts faster).
This property can be found in the file conf/agent-configuration.xml:

  <entry key="rhq.agent.plugins.enabled" value="Platforms,JMX,RHQAgent"/>

The entries are a comma separated list of plugin (short) names. To determine those, you can run
plugins info at the agent command prompt:

> plugins info
Details of the plugins that are currently installed:

rhq-agent-plugin-4.10.0-SNAPSHOT.jar
        Plugin Name:  RHQAgent
        Display Name: RHQ Agent
        Last Updated: 14. Februar 2014 11:03:35 MEZ
        File Size:    51.558 bytes
        MD5 Hashcode: f7eb7577af667ee4883437230e4b2d8c
[...]

Summary of installed plugins:
[RHQAgent, Platforms, JMX]

The short names are the ones encoded as "Plugin Name" and which are also shown on the summary line. There has actually been a property to disable unwanted plugins for a longer time, but just enabling the ones needed is probably easier.

The other thing you should do it to remove the -Xms setting in the rhq-agent.sh script- the default of a 64MB minimum heap is just too large here.

With those 3 plugins above and the removed Xms setting, my agent has a committed heap of ~14MB and a used heap of ~11MB. A dump is/was 4MB in size.

P.S.: “Raspberry Pi" is a trademark of the Raspberry Pi Foundation

Building WildFly

After Red Hat has renamed TASFKAJB to WildFly, the git repository has also been moved to https://github.com/wildfly/wildfly.

Building WildFly is pretty similar to what it has been before

• Fork the WildFly repository to your own on GitHub
• Clone your repository to the local disk (which is in my case)
  git clone git@github.com:pilhuhn/wildfly.git
• Change into the created wildfly directory
  cd wildfly
• Run maven to build the server
  mvn install

The server is then created inside the build/target directory

$ pwd
/devel/wildfly/build/target
$ ls
antrun				generated-configs		wildfly-8.0.0.Alpha1-SNAPSHOT

change into this directory and start the server via bin/standalone.sh

Done :-)

RHQ 4.6 released

As I've mentioned before, the RHQ team has been very busy since RHQ 4.5.1 (and actually already before that) and has switched the application server it uses to JBoss AS 7.1. Directly after the switchover we have posted a first alpha version.

Now after more work and fixes, we are happy to provide the release 4.6 of RHQ, that has all the issues resolved that arose from the switch. Features of this release are:

• The internal app server is now JBossAS 7.1.1
• GWT has been upgraded to version 2.5
• There is a new installer (this has also changed since the 4.6 alpha release)
• The REST-Api has been enhanced
• Korean translations have been added (contributed by SungUk Jeon)
• Webservices have been removed
• Building RHQ now requires Java7, but it will still run on Java6

.

See the full release notes for details. They also contain a list of commits.

You can download the release from source forge.

As mentioned above, the old installer is gone, so make sure to read
the wiki document describing how to use the new installer.

Maven artifacts are available from the JBoss Nexus repository and should soon also be available from Central.

We also like to say thank you to our contributors for this release:

• Jürgen Hoffmann
• Richard Hensman
• SungUk Jeon

Please give us feedback, be it in Bugzilla, Mailing lists or the forum. Or just join us on IRC at irc.freenode.net/#rhq.

RHQ participates in this years Google Summer of Code™

RHQ is happy to be able to participate in this years Google Summer of Code™

We have as part of the JBoss.org organization seen many very good proposals and the whole JBoss.org has seen many more so that even with the generosity of Google, we have obviously obtained a lot less slots than the number of good proposals received.

So I am extremely happy that for RHQ those two proposals have been accepted:

• Replace old graphs by GWT ones - Denis Krusko: The main graphs in RHQ are still from the pre RHQ era and implemented as Servlets embedded in JSP and struts pages. The current UI is mostly written in GWT. While we were able to embed the old graphs, they still don't feel 'right'.

  
  Denis will investigate options for replacement and then implement new GWT-compatible graphing. Denis will also look at how the grahps can become more interactive by e.g. applying formulas on the data.

• Implement an RHQ agent in Python - Krzysztof Kwaśniewski: The classical RHQ agent is written in Java and probably not best suited for every purpose. With the addition of the REST api, it now became easier to implement agents in other languages.

  
  Krzysiek will implement an agent in Python, that on one side talks REST with the RHQ server and on the other side interfaces with Matahari to take metrics from Fedora and RHEL hosts.
  

I am together with the other RHQ contributors very much looking forward to see Krzysztof and Denis in action.

Heiko

*) GSoC Logo is taken from http://code.google.com/p/google-summer-of-code/wiki/GsocLogos and has a CC-3.0-attrib-non-commercial-no-deratie license

Small Fosdem 2012 review

On the weekend of Feb 4th, 2012 the European (and not only) Free and Open source community met in Brussels, Belgium for FOSDEM (Free and Open Source Developers Meeting).



The following video gives an impression on what FOSDEM is like - and I was only able to capture a tiny part of it.

(original size is 960x540)

I only arrived on Saturday at around noon via train. Stuttgart to Cologne was via ICE and from Cologne on I took the Thalys where I had the luck to get a a first class ticket for the price of a regular 2nd class one; the ticket included free WiFi and free breakfast with croissants, sandwiches and beverages.


I gave a talk on RHQ "Recent and future developments". In the presentation I talked about what we have achieved recently and where we may perhaps go in the future.


(original size is 960x540, here are slides as pdf)

As I had the camera with me, I also recorded a few other talks

• Byteman
• Thermostat project
• IcedTea and IcedTeaWeb

I was lucky to meet with some of the JBoss colleagues, but was not able to make it to the virt sessions and to meet more of the various Red Hat people that were there. Fortunately some of the talks were recorded by the FOSDEM crew and will hopefully be online soon.

FOSDEM is for sure a conference to go to -- and not only because entrance is free and there is beer sold all over the place :)

JBoss, Fedora and more from Red Hat at FOSDEM 2012

A lot of folks from Red Hat are visiting FOSDEM 2012 this year.


I've listed the speakers here - I will myself talk on Saturday on RHQ.

In addition to the talks there are also stands:

• JBoss: K building, 1st floor
• Fedora: K building, ground floor

You will be able to get a printed version of this list at the Fedora stand.

Saturday

WHEN	EVENT	TRACK & ROOM	SPEAKER
11:00-11:10	Welcome to the CrossDesktop Devroom	CrossDesktop  (H.1308)	Christophe Fergeau
11:00-11:05	Welcome to the Legal Issues DevRoom	Legal Issues  (AW1.125)	Richard Fontana
11:00-11:55	BoxGrinder : Grind your appliances easily	JBoss.org  (K.3.201)	Marek Goldmann
11:00-11:05	Welcome to the Free Java DevRoom	Free Java  (K.4.401)	Mark Wielaard, Andrew Haley, Andrew Hughes
12:00-12:55	Drools Planner: Planning optimization by example	JBoss.org  (K.3.201)	Geoffrey De Smet
12:30-12:55	libguestfs - tools for modifying virtual machine disk images	Virtualization & Cloud  (Chavanne)	Richard Jones
13:00-13:25	Cloud high availability with pacemaker-cloud	Virtualization & Cloud  (Chavanne)	Pádraig Brady
13:00-13:55	Openshift	JBoss.org  (K.3.201)	Grant Shipley
14:00-14:25	The Aeolus Project	Virtualization & Cloud  (Chavanne)	Francesco Vollero
14:00-14:55	JBoss AS7 : Building JBoss AS 7 for Fedora	JBoss.org  (K.3.201)	Carlo De Wolf
15:00-15:50	Virtualization with KVM: bottom to top, past to future	Hypervisors  (Janson)	Paolo Bonzini
15:00-15:55	JBoss Forge / Arquillian: Two Missing Links in Enterprise Java Development	JBoss.org  (K.3.201)	Koen Aers
15:00-15:25	Open Clouds with Deltacloud API	Virtualization & Cloud  (Chavanne)	Michal Fojtik
15:30-15:55	DMTF CIMI and Apache Deltacloud	Virtualization & Cloud  (Chavanne)	Marios Andreou
16:00-16:55	Infinispan: where open source, Java and in-memory data grids converge	JBoss.org  (K.3.201)	Manik Surtani
16:15-17:00	Crossdesktop group picture	CrossDesktop  (H.1308)	Christophe Fergeau
16:30-17:00	The (possible) decline of the GPL, and what to do about it	Legal Issues  (AW1.125)	Richard Fontana
17:00-17:55	RHQ: Recent and future developments in the RHQ systems monitoring and management framework	JBoss.org  (K.3.201)	Heiko Rupp
17:30-18:00	Panel on Application Stores	Legal Issues  (AW1.125)	Richard Fontana
18:00-18:55	Guvernor/JBPM : Managing workflows and business rules with Guvnor and the jBPM designer	JBoss.org  (K.3.201)	Geoffrey De Smet, Marco Rietveld
18:00-18:30	Thermostat: Taking over the Java tooling world with Open Source Software	Free Java  (K.4.401)	Jon VanAlten, Omair Majid
18:20-18:35	PMD5: What can it do for you?	Lightning Talks (Ferrer)	Romain PELISSE
18:30-19:00	Tracing, Debugging and Testing With Byteman	Free Java  (K.4.401)	Andrew Dinn

Sunday

WHEN	EVENT	TRACK & ROOM	SPEAKER
09:00-09:25	Spice "Open remote computing" introduction	Virtualization & Cloud  (Chavanne)	Hans de Goede
09:30-09:55	USB redirection over the network	Virtualization & Cloud  (Chavanne)	Hans de Goede
10:00-10:45	Systems Management with Matahari	Configuration & Systems Management  (K.3.601)	Zane Bitter
10:45-11:15	Boxes, use other systems with ease	CrossDesktop  (H.1308)	Zeeshan Ali (Khattak), Marc-André Lureau
11:00-11:15	Powerful tools for Linux C/C++ developers based on Eclipse	Lightning Talks (Ferrer)	Andrew Overholt
11:00-11:25	Virtualization Management the oVirt way	Virtualization & Cloud  (Chavanne)	Itamar Heim
11:30-11:55	oVirt Engine Core: Internals and Infrastructure	Virtualization & Cloud  (Chavanne)	Omer Frenkel
11:30-12:00	Can I legally do that?	Free Java  (K.4.401)	Mark Wielaard
12:00-12:25	VDSM - The oVirt Node Management Agent	Virtualization & Cloud  (Chavanne)	Federico Simoncelli
12:30-13:30	OpenJDK on ARM: Quo vadis?	Free Java  (K.4.401)	Andrew Haley
15:00-15:55	Building app sandboxes on top of LXC and KVM with libvirt	Virtualization & Cloud  (Chavanne)	Daniel Berrange
15:30-16:00	IcedTea and IcedTea-Web	Free Java  (K.4.401)	Deepak Bhole
16:30-17:00	Discussion on the Future of Free Java	Free Java  (K.4.401)	Andrew Haley

Some notes from the RHQ team meeting (and a team photo)

Last week, the whole RHQ development team met in the Red Hat office in Westford (near Boston). It was very nice for me to finally see some of the old colleagues again after two years and also to meet the new colleagues on the team.

And of course, we took a team photo

We had some very good discussions about possible future features (like e.g. supporting a REST style API into the system or on the future of alerts) - I will post more information soon. In the mornings we had show'n'tell style session where each developer was presenting some area of work to the team.

After work we did some more recreational things like:

• Seeing the Boston Red Sox win 18:9 in a 4h base ball game
• Playing minigolf at Kimball Farm (and ate huge amounts of ice cream)
• Had dinner at nice places

One of things we also did is to publish some sort or Roadmap for RHQ and discussed that we will move the source to GitHub at some time and also split up the build in an easier to build way. We will post about that when we are making more progress on this.

Ah and did I mention "Beer"?

I am a RHCSA now :-)

Last week I spend the whole week in the Red Hat training center here in Stuttgart, participating in the Red Hat Certified System Administrator (RHCSA) fast track course and exam. The RHCSA is probably still very unknown and better known under its previous name "RHCT". RHCSA runs on RHEL 6.

The fast track training consists of some more basic aspects of system administration like installing and enabling services, setting up networking in the first half and some more advanced topics like ACLs, SELinux, LVM (with encryption and snapshots) in the second part. The course material works with brand new RHEL 6 stuff and also the exam is on RHEL 6. Top notch!

Friday was exam time. As I am not allowed to talk about this only so far: this is a real-world get things done kind of exam and not some multiple choice test.

And then I was waiting for exam results - and today I got it: I passed and I am now a RHCSA! :-)))

Cert number is 100-003-383

 

RHQ at Linuxtag

I will present "Systemmanagement mit RHQ - auch für Linux" at Linuxtag
Berlin next wednesday, June 9 at 3pm in room Europa 1.

I will talk about the architecture of RHQ and how it can be used
for Linux monitoring and will especially mention the Nagios integration by Alex Kiefer.

Wednesday schedule for Linuxtag is here (Don't worry, if you still see the CDI talk in this slot. I am sure my talk will soon show up at 3pm in room "Europa 1")

RHQ community build 3.0.0.B06 released

The RHQ team is pleased to announce the immediate availability of community release 3.0.0.B06 of the RHQ systems management and monitoring platform. As before this release includes the Jopr bits.

This release features a lot of bug fixes as you can see on the
Release Notes.

New features include optimized search in Inventory and especially provisioning of software (like JBossAS servers). See below.

You can download the release from SourceForge

Provisioning...

To enable this you need to go to Administration -> System Configuration -> Settings and enable debug mode

This will then show a new menu "Debug" with a "GWT GUI" entry:

Click on "GWT GUI" and you'll get to a GUI written in GWT with a new "Bundle" menu item.

To learn more about this, have a look at the Wiki and especially
this flash demo video by Mazz

Small FOSDEM 2010 round up (with pics and video)

So I've spent last weekend in Brussels, Belgium at FOSDEM, gave a talk, met with some colleagues and had a great time.



Ok, this was a bit tense :)

FOSDEM 2010 was the 10th incarnation of the Free and Open Source Developer's European Meeting. There have been thousands of geeks at the ULB (UNiveristé libre de Brussels) - exact numbers are not known as there has been no official registration. THere have been tweets about being around 2000 devices with IPv4 and close to 2000 devices with IPv& active - this already shows the size of the audience.
Despite this huge number of devices online, the network was great (FOSDEM had a 1GBit link to the internet) - wireless was available in nearly every room at good strength and performance On sunday morning they even encouraged people to use more bandwidth - many much more commercial conferences should talk to the FOSDEM NOC in order to learn how to do this.

I arrived in Brussels on Saturday morning having taken an early train from Stuttgart - after Cologne I met the first two other guys heading to FOSDEM too :)

Later on saturday I gave myself a talk about Systemsmanagement with RHQ. Slides are available here.

After my talk, my colleague Mark Procter gave a presentation about Drools. When my talk was over I felt very much relieved and was more able to attend other talks. I wanted to attend some Postgres related ones, but they were already crowded.

One of the/my highlights was the talk by Andy S. Tanenbaum about Minix 3 - he presented with a good sense of humor, so it was nice to listen. His talk actually made me want to do some low-level stuff hacking again (I used to work on NetBSD in the past). Later on I was sitting in the Free Java track and was thinking that I should perhaps also start hacking on the VM. Lukily for me I did not attend all talks. Otherwise I'd probably end up with programming Drupal in Assembler for one of those little embedded boards I that the OpenEmbedded guys had on display :-)

On Sunday Dave Fetter from Postgres showed on Sunday how to compute Mandelbrot sets and solve the Traveling Salesman Problem in SQL on Postgres - totally crazy! :)

After this I have been in the Free Java dev room and met some colleagues from Red Hat, working in that area - it is always nice to finally be able to put a face behind a name.

Below are a few impressions from Fosdem and Brussels - enjoy (I will fix the image orientation as soon as I know how ... ). More pictures are e.g. on Flickr, here and here.

Below movie is also available as .ogg version (79 MB).

RHQ tip of the day: Help, my resource does not show in the tree!

We see it from time to time that people have correctly set up Jopr or RHQ and want to monitor e.g. a JBoss AS server or other resources. They even have an agent running on the machine with the JBoss AS on, but still it does not show up in the resource tree of this platform.

Most often this is a simple issue, as the resource is just sitting in the queue to be imported into inventory:

Just select the ones you want to import, click on the import button and after a second, the resource will show up in the resource tree below its platform.

Jopr and RHQ require this on purpose, as this way you can ignore e.g. servers that are just up at the moment of import, but which are not to be managed.

As you have seen that resources can be ignored, there is also a way to "bring them back" when you decide later to import them. Either click on "View all..." in the Auto-Discovery portlet seen above or select Auto discovery queue from the Overview menu, then select Both new and Ignored from the drop-down:

This will show ignored resources, that you can check and then click un-ignore to get them back into the new state from where you can finally import them.

Jopr and JBossON sessions at JBossWorld

If you're going to JBossWorld, you will find also quite some sessions about JBoss ON and Jopr:

• Extending Jopr - by me :-), Wed 3:20pm


• The "bossanova-way": JBoss management with JON in Brazil - Real case studies and applications of JBoss Operations Network, Wed 2:10 pm


• How to Effectively Manage Java Applications, Thu, 9:40 am


• Building and Maintaining a Large Shared JBoss Application Infrastructure, Thu 2:40pm


• Birds of a Feather: Management & Operations, Wed 5:45 pm


• LAB: Take control of your JBoss Infrastructure with JBoss Operations Network, Thu 3:50 pm

The JBossWorld web page has the full agenda of the event.

Whitepaper on how to write a plugin for JBossON, Jopr and RHQ available

I am very pleased to announce that Red Hat has published my plugin development series as white paper. This document got real formatting from the Red Hat creative team - and it is looking just great. I am very pleased with it. The following is a screen shot of the title page and if you want to see more, you have to download it :)

Image of the title page of the paper

You can get the paper from those locations:

• Red Hat Systems Management Resource Center


• JBoss ON product page in the right "Quick Start" menu


• JBoss ON product details page - also in the right "Quick Start" menu

Many thanks to the Creative team for going over my "rough" text in OpenOffice and making this look so great. I also want to thank Chris Morgan for his work, as well as my colleagues who have read the paper and have given me hints on how to improve it.

Red Hat News | Project Jopr: JBoss Operations Network Now Open Source

After we released Jopr last week and even had an announcement on TheServerSide (My first posting there!), there is now an official Red Hat press release:

Red Hat News | Project Jopr: JBoss Operations Network Now Open Source.

Cool!

And btw.: I even added a first 'draft' of a JBoss Cache plugin to Jopr since then.

Jopr - JBoss Operations Network 2 goes open source too

You have heard about JBoss Operations Network 2?
Then you probably also know that RHQ is its upstream project (like in the Fedora / Red Hat Enterprise Linux case).

Jopr

If you had a look at JBoss ON 2, you have surely also seen that RHQ does not have all the features, JBoss ON 2 has (namely monitoring and management of JBossAS was missing).

This hole has now been closed by Jopr. Jopr closes the gap between RHQ and JBoss ON 2, builts on RHQ as its infrastructure framework and serves as open source upstream for JBoss ON 2

You can find it at http://www.jboss.org/jopr/.

Forums are also available for Jopr

Embedded Jopr

Next to Jopr we have another thing coming for you: Embedded Jopr. This is a new management console for JBossAS instances that shares parts of the underlying infrastructure and plugins with RHQ and Jopr. You can deploy and use it on JBoss AS 4.2.x, as described on the install page.

Embedded Jopr has its home page at https://www.jboss.org/embjopr/.

Forums for Embedded Jopr also live on jboss.org

Join us ...

The Jopr team has registered #jopr on irc.freenode.net, so come an join us there (as well as on #rhq on the same server network).

JavaForumStuttgart 2008 (subjective review)

Yesterday I was at 11th Java Forum Stuttgart (JFS), a regional Java conference with 1100 attendees(!). The JFS featured 42 sessions in 6 parallel tracks in one day. This conference is very popular and attendees came from all over Germany. As last year, the conference took place in the Liederhalle, which offers much more space than the place the JFS has been in the years before.

I also had a talk about "Profiler, the better debugger?". The talk went well - I had around 250-300 attendees, that stayed in the room :-) I was going through some slides and then showing live examples about how to dig into unknown software with the help of the profiler.

Of course I took RHQ as example, even if it was not that unknown for me :-) After the session I got some feedback that people liked the talk and one ex-colleague told me that he is currently having the problem to dig into more or less unknown software, so that this exactly fits his needs.


There have been two talks about JBoss products / projects:

• Advanced JBoss Cache (Carsten Mjartan): I was briefly in this session to take some pictures, but left early again, as I already know a lot about JBoss Cache, so this was no big news for me.



• Geschäftsprozese und -regeln mit jBPM und Drools - ein unschlagbares Team (Bernd Rücker): I also know a little about this, but as I was the moderator, I had to stay :-) Seriously: Bernd gave a good talk in front of ~300 attendees about what is BPM and BRM and how you can combine jBPM and Drools.

One of the highlights shurely was the talk by Erich Gamma (about Jazz)- my talk was unfortunately at the same time, so I was not able to attend it :-(

Red Hat also had a booth at JFS:



Later in the evening there have been some BOF sessions - I have a BOF about RHQ - basically the same thing as in the SIG-JBoss meeting a week ago.

You will find the slides of my talk at the JFS pages. The slides of the BOF can be found

After the talks, there was food and free beer sponsored by IBM - and Gee Hye Lee was nicely playing piano for us.



The JFS featured good content and good food as usual, so mark the date in your calendar for next years conference:-)