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JBoss Fuse - Make your JBoss EAP Fuse ready!

In the upcoming release of JBoss Fuse 6.2.1, we are going to support running Camel on EAP. That means now you can now run Camel Route in JBoss EAP. But first thing first, how do we get our JBoss Enterprise application server ready?

JBoss EAP is a very modularized architecture, which allows you to add/remove the modules that you do not need when starting up this JavaEE standard container. The modules are called subsystems in JBoss EAP. By placing the libraries, dependencies setting in EAP, and setup the subsystem in the configuration xml (default is standalone.xml or domain.xml depends on your mode). You can basically plug and run your libraries in JBoss EAP. So JBoss Fuse will do the same thing by add a subsystem called "camel".

Don't worry about the whole technical details, because in JBoss Fuse 6.2.1 you will receive a patch file, that will automatically does all the hard work for you! For those of people who has not install JBoss EAP before, all you have to do is to download JBoss EAP 6.4.0, and startup the installer.

You will then have the JBoss EAP ready to go, to make your EE container JBoss Fuse ready, please download the fuse-eap-installer-6.2.1.redhat-xxx.jar, which is the patch that installed the camel subsystem.

Place the fuse-eap-installer-6.2.1.redhat-xxx.jar under where you installed the EAP container. and then run

java -jar fuse-eap-installer-6.2.1.redhat-xxx.jar

You will notice there are few patching script created for you under bin folder, and also libraries installed under modules folder. Don't worry about this for now, the most important after patching, is you will find several new configuration sample xml under standalone/configuration and domain/configurations.

  • domain-camel.xml
  • standalone-camel.xml
  • standalone-full-camel.xml 

and it will also change your default configurations,

  • domain.xml
  • standalone.xml
  • standalone-full.xml
  • standalone-ha.xml
  • standalone-full-ha.xml

You will also find the there are management consoles installed too.

So, now go to bin/ and run or standalone.bat if you are on windows, then you are ready!


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JBoss EAP 6 - 效能調校 (一) DataSource 的 Connection Pool

效能沒有什麼Best Practice, 反正能調整的就那些。 通常,一個程式的效能大概有70-80% 都跟程式怎麼寫的其實比較有關係。

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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。


Connection Pool 最少會存留的connection 數量


Connection Pool 最多可以開啓的 connection 數量


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

我的建議是觀察一下平常程式要用到的量設定為 min-pool-size 。

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