Skip to main content

Webhooks and Integrating Aseembla svn commits with Pivotal tracker stories

I am intrigued by this webhook concept and it seems a very nice way for B2B communication.  Webhooks are powerful and it eliminates Poll for integrating with third parties. All you need is to have some REST api registered that will be called when an event occurs. A good e.g. of webhook for a cloud storage provider can be  "automatically print this document on registered printers when a file is dropped in this folder". Lets assume all the customer needs to do is register a webhook "http://xyz.foo.com/printer/xxd344/print?token=authTokenXXX and the cloud storage provider can then call this url and POST the body of document in input.

 Recently I had a chance to play with webhooks when I was trying to move jenkins to EC2 for my friend and as part of it I moved his svn to assembla.com.  I saw webhooks and I thought I can integrate commits into svn hosted by assembla.com to pivotaltracker.com tickets.  It took just 1 hour to do it but it was fun, apparently there are post commit hooks that you can add in svn but this was much easier to do because assembla.com has a webhook concept https://helpdesk.assembla.com/customer/portal/articles/1607029-configuring-the-webhook-tool  so all I need to do is find a pivotal api that would allow to post commit messages to it.

 It seems Pivotal tracker already has this https://www.pivotaltracker.com/help/api/rest/v5#source_commits_post  .  The challenge was that assembla webhook doesnt allow you to pass any custom header where I can pass the X-TrackerToken header but after some api documentation trolling I found that you can pass the token in query string like

https://www.pivotaltracker.com/services/v5/source_commits?token=sdfsdfdsfdsfdsfdsf  and I was done. After Configuring the integration the commit messages show up in pivotal story.




Comments

Post a Comment

Popular posts from this blog

Haproxy and tomcat JSESSIONID

One of the biggest problems I have been trying to solve at our startup is to put our tomcat nodes in HA mode. Right now if a customer comes, he lands on to a node and remains there forever. This has two major issues: 1) We have to overprovision each node with ability to handle worse case capacity. 2) If two or three high profile customers lands on to same node then we need to move them manually. 3) We need to cut over new nodes and we already have over 100+ nodes.  Its a pain managing these nodes and I waste lot of my time in chasing node specific issues. I loath when I know I have to chase this env issue. I really hate human intervention as if it were up to me I would just automate thing and just enjoy the fruits of automation and spend quality time on major issues rather than mundane task,call me lazy but thats a good quality. So Finally now I am at a stage where I can put nodes behing HAProxy in QA env. today we were testing the HA config and first problem I immediat...
Post a Comment
Read more

Adding Jitter to cache layer

Thundering herd is an issue common to webapp that rely on heavy caching where if lots of items expire at the same time due to a server restart or temporal event, then suddenly lots of calls will go to database at same time. This can even bring down the database in extreme cases. I wont go into much detail but the app need to do two things solve this issue. 1) Add consistent hashing to cache layer : This way when a memcache server is added/removed from the pool, entire cache is not invalidated.  We use memcahe from both python and Java layer and I still have to find a consistent caching solution that is portable across both languages. hash_ring and spymemcached both use different points for server so need to read/test more. 2) Add a jitter to cache or randomise the expiry time: We expire long term cache  records every 8 hours after that key was added and short term cache expiry is 2 hours. As our customers usually comes to work in morning and access the cloud file server it ...
Post a Comment
Read more

Spring 3.2 quartz 2.1 Jobs added with no trigger must be durable.

I am trying to enable HA on nodes and in that process I found that in a two test node setup a job that has a frequency of 10 sec was running into deadlock. So I tried upgrading from Quartz 1.8 to 2.1 by following the migration guide but I ran into an exception that says "Jobs added with no trigger must be durable.". After looking into spring and Quartz code I figured out that now Quartz is more strict and earlier the scheduler.addJob had a replace parameter which if passed to true would skip the durable check, in latest quartz this is fixed but spring hasnt caught up to this. So what do you do, well I jsut inherited the factory and set durability to true and use that public class DurableJobDetailFactoryBean extends JobDetailFactoryBean {     public DurableJobDetailFactoryBean() {         setDurability(true);     } } and used this instead of JobDetailFactoryBean in the spring bean definition     <bean i...
7 comments
Read more