Skip to main content

Setup Apache ActiveMQ

Image
By
This is a follow up of my previous post JMS Cache Channel Setup. The goal is to configure JMS cache invalidation for Tridion Content Delivery. In my previous post I was describing how to configure the Tridion Deployer to use JMS technology and to post cache notification messages to an Apache ActiveMQ server. This post describes the steps I took to install and configure ActiveMQ on my machine.

I started my endeavor without having any prior experience with ActiveMQ. To my surprise, the installation was a breeze and took me about 20 minutes to get everything running.

I started by visiting the home of ActiveMQ -- activemq.apache.org. The latest version as of the day was 5.10.0. I followed the no-nonsense guide on the home page and I first downloaded ActiveMQ. I use a Mac (like every freelancer who respects himself :-p) and I personally love FreeBSD, so I downloaded the Unix/Linux/Cygwin Distribution. Namely, a file named apache-activemq-5.10.0-bin.tar.gz.

The Getting Started Guide instructs you to:
  • decompress the archive to a folder of your choice (I used /srv). Execute the command
        tar zxvf activemq-5.10.0-bin.tar.gz

This creates folder /srv/apache-activemq-5.10.0
  • if activemq start-up script is not executable, make it executable by executing the following:
        > cd /srv/apache-activemq-5.10.0/bin
        > chmod 755 activemq

Next, you can proceed to configure ActiveMQ. This is where the Getting Started Guide is a bit inaccurate. Before being able to run ActiveMQ, you need to run the 'setup' command. This will create a configuration file in the location of your choice. I used my homedir ~/.activemqrc and executed the following:

        > cd /srv/apache-activemq-5.10.0
        > bin/activemq setup ~/.activemqrc

And really that's all, folks. You should now be able to run ActiveMQ, start up your Deployer and see it connect to the JMS server (check the cd_core log in debug mode).

Start command:

        > bin/activemq start

Shutdown command:

        > bin/activemq stop

Check running state:

        > bin/activemq status

Don't forget there is also a web console with default user & pass admin/admin, and it's very helpful in monitoring the server:

        http://localhost:8161/admin


Labels:

Comments

Post a Comment

Popular posts from this blog

Scaling Policies

By
This post is part of a bigger topic Autoscaling Publishers in AWS . In a previous post we talked about the Auto Scaling Groups , but we didn't go into details on the Scaling Policies. This is the purpose of this blog post. As defined earlier, the Scaling Policies define the rules according to which the group size is increased or decreased. These rules are based on instance metrics (e.g. CPU), CloudWatch custom metrics, or even CloudWatch alarms and their states and values. We defined a Scaling Policy with Steps, called 'increase_group_size', which is triggered first by the CloudWatch Alarm 'Publish_Alarm' defined earlier. Also depending on the size of the monitored CloudWatch custom metric 'Waiting for Publish', the Scaling Policy with Steps can add a difference number of instances to the group. The scaling policy sets the number of instances in group to 1 if there are between 1000 and 2000 items Waiting for Publish in the queue. It also sets the
Post a Comment
Read more

Toolkit - Dynamic Content Queries

By
This post if part of a series about the  File System Toolkit  - a custom content delivery API for SDL Tridion. This post presents the Dynamic Content Query capability. The requirements for the Toolkit API are that it should be able to provide CustomMeta queries, pagination, and sorting -- all on the file system, without the use third party tools (database, search engines, indexers, etc). Therefore I had to implement a simple database engine and indexer -- which is described in more detail in post Writing My Own Database Engine . The querying logic does not make use of cache. This means the query logic is executed every time. When models are requested, the models are however retrieved using the ModelFactory and those are cached. Query Class This is the main class for dynamic content queries. It is the entry point into the execution logic of a query. The class takes as parameter a Criterion (presented below) which triggers the execution of query in all sub-criteria of a Criterio
Post a Comment
Read more

Running sp_updatestats on AWS RDS database

By
Part of the maintenance tasks that I perform on a MSSQL Content Manager database is to run stored procedure sp_updatestats . exec sp_updatestats However, that is not supported on an AWS RDS instance. The error message below indicates that only the sa  account can perform this: Msg 15247 , Level 16 , State 1 , Procedure sp_updatestats, Line 15 [Batch Start Line 0 ] User does not have permission to perform this action. Instead there are several posts that suggest using UPDATE STATISTICS instead: https://dba.stackexchange.com/questions/145982/sp-updatestats-vs-update-statistics I stumbled upon the following post from 2008 (!!!), https://social.msdn.microsoft.com/Forums/sqlserver/en-US/186e3db0-fe37-4c31-b017-8e7c24d19697/spupdatestats-fails-to-run-with-permission-error-under-dbopriveleged-user , which describes a way to wrap the call to sp_updatestats and execute it under a different user: create procedure dbo.sp_updstats with execute as 'dbo' as
1 comment
Read more