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Red Hat JBoss Fuse - RHTE Fuse and Camel Workshop

Last week was the Red Hat's Asia Pacific Technical Exchange event. It was a series of technical sharing session across Red Hat's product, from Red Hat Enterprise Platform solutions, Red Hat Openstack, Red Hat Openshift to Red Hat JBoss Middleware solutions.
Lots of interesting topics and ideas were shared during the session, many APAC Red Hatter has come up with interesting uses cases and their experiences with the products.

I had the honor to speak in 2 of the sessions, one is about IOT with AMQP and MQTT, which I have already talked about in my blog, the other one is a workshop.

This is a 1.5 hour workshop,

In this workshop we are first going to load data from H2 database to Red Hat JBoss Data Grid, provide a faster elastic memory grid cache for user to look up. 


Then we are going to build a web application with an interface for user to lookup data from the cache we have created. The communication will be asynchronized with WebSocket protocol with Fuse Camel route. In the route, it will determine if the requested content can be found in the cache. We will use the content routing integration pattern to reply the content that we are going to reply back.
You can find the instruction and source code here: https://github.com/weimeilin79/RHTEWorkShop
Note, the instruction is under doc folder

Here is the video recorded on the day!

 

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這個題目很多人叫我寫,可是這題目好大,這分明就是整死我咩~
所以我會分幾段慢慢寫。

JBoss 的 SubsystemDatasource WebWeb Service EJB Hibernate JMSJCAJVM 調校OS (作業系統)

先來看一下 DataSource Subsystem, DataSource 的部分主要是針對Connection Pool 做調校。

通常,程式都會需要跟資料庫界接,電腦在本機,尤其是在記憶體的運算很快,但是一旦要外部的資源連接,就是會非常的耗資源。所以現在的應用程式伺服器都會有個Pool 放一些先連接好的 資料庫connection,當程式有需要的時候就可以馬上提供,而不用花那些多餘的資源去連接資料庫。

這就是為什麼要針對Connection Pool 去做調校。

以下會討論到的參數,都是跟效能比較有關係,Datasource 還有很多參數,像是檢核connection 是否正確的,我都不會提到。如果你追求的是非常快速的效能,那我建議你一個檢核都不要加。當然,這樣就會為伺服器上面執行的程式帶來風險。這就是你要在效能與正確,安全性上面的取捨了。 (套句我朋友說的話,不可能又要馬兒好,又要馬兒不吃草的..)

最重要的調校參數就是 Connection 的 Pool 數量。(也就是那個Pool 裡面要放幾條的connection.) 這個參數是每一個應用程式都不一樣的。

min-pool-size 

Connection Pool 最少會存留的connection 數量

max-pool-size 

Connection Pool 最多可以開啓的 connection 數量

prefill

事先將connection pool 裡面建立好min-pool-size 的connection.

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