Guy Mahieu's Blog

IvyIDEA: Ivy support for IntelliJ IDEA

Guy Mahieu — Sat, 18 Oct 2008 14:55:15 +0000

At my current job everyone is using eclipse and ivy is the standard dependency manager. I’ve used eclipse as well for the last months, but it could never make me forget IntelliJ IDEA. Too bad IntelliJ still lacks ivy support though…

There are a few plugins around that add (some) ivy support to IntelliJ IDEA but I wasn’t able to get them to work properly; they seem to be written for a specific situation or are a pain to configure.

All of this got me to the point where I started working on my own plugin: IvyIDEA. At first I started out with a quick and dirty way of adding dependencies from a certain folder into a module library in IntelliJ. After a few days and nights of development, I now have it integrated with the ivy resolve functionality. It detects source and document types and adds them as such. As a bonus (and because I was curious how it worked) I also added an IvyIDEA facet in intellij, meaning that ivy.xml files are autodetected and configured to be recognized by the plugin.

It is still very rough around the edges (the exception handling is non-existing and there currently is no output console to see what’s going on during the resolve process) but I use it daily in my job and I hope to have a good enough version ready soon to add to the IntelliJ plugin repository.

If you can’t wait until then, you can always download the source code and compile it on your own from www.ivyidea.org. If you have feature requests, bug reports or comments, please let me know!

Update 2008-10-19: I just saw that JetBrains is organizing an IntelliJ plugin contest, and I decided to submit IvyIDEA as an entry. They suggested to publish a version as early as possible so I decided to already publish a first alpha version to the plugin repository. This means that you can now install the first rough-around-the-edges alpha version using the plugin manager in IntelliJ if you like.

Getting the depth of an MQSeries queue from Java

Guy Mahieu — Wed, 11 Jun 2008 09:39:37 +0000

The JMS spec does not provide a way to easily obtain the number of messages on a certain queue. You could create a browser and browse through the entire queue and keep count, but this is very slow.

The java client for MQSeries (or WebsphereMQ as it is called nowadays) does provide this functionality, so if you don’t mind using IBM specific classes, you could do it like this:

public int getDepth(String queueName) throws MQException {
  // Build quemanager (this should be done in another method)
  // and not every time in a real life application
  MQEnvironment.channel = "CHANNELNAME";
  MQEnvironment.port = 1414;
  MQEnvironment.hostname = "qmgrhost.yourdomain.com";
  MQEnvironment.properties.put(MQC.TRANSPORT_PROPERTY, 
    MQC.TRANSPORT_MQSERIES);
  MQQueueManager qmgr = new MQQueueManager("YourQueueManagerName");
  // access the queue to query its depth
  com.ibm.mq.MQQueue queue = qmgr.accessQueue(queueName, 
    MQC.MQOO_INQUIRE | MQC.MQOO_INPUT_AS_Q_DEF, 
    null, null, null);
  return queue.getCurrentDepth();
}

The com.ibm.mq.MQQueue class exposes some other interesting methods to get more information about a queue, like the maximum depth and the maximum message length.

Getting the svn HEAD revision number from a windows batch file

Guy Mahieu — Mon, 09 Jun 2008 05:10:49 +0000

The svn command has an info parameter with which you can obtain some info about the current directory, like this:

C:\Projects\myproject\branches\DEV_V0001.00>svn info --revision HEAD
Path: DEV_V0001.00
URL: http://svn.mycompany:10080/svn/myproject/branches/DEV_V0001.00
Repository Root: http://svn.mycompany:10080/svn/myproject
Repository UUID: 495b61df-840d-0410-9b36-f3cf8ec0f97e
Revision: 8251
Node Kind: directory
Last Changed Author: mahieuguy
Last Changed Rev: 8211
Last Changed Date: 2008-06-05 13:05:22 +0200 (do, 05 jun 2008)

I could not find a command that would just return the revision number, which we needed in our build script. On linux systems it would be trivial to extract just the rev number from the output of the ‘info’ command, so I hoped it would also be possible in dos/windows without installing extra tools. It turned out to be possible, but much less elegant than I suspected:

@echo off
FOR /F "tokens=2 skip=4" %%G IN ('svn info --revision HEAD') DO ^
IF NOT DEFINED REVISION SET REVISION=%%G
echo %REVISION%

Note that the ^ character is just there to split the command into two lines, this works for XP batch scripts, but I’m not sure about other versions of cmd.exe

The HEAD revision number is put in the %REVISION% parameter. Make sure you don’t already have a REVISION parameter defined before executing the command in the batch file though, because it will only be set if it is not already defined. This was needed to be able to get the FOR command to ignore all lines after the ‘Revision: 8251′ line from the ’svn info’ result.