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JEAP 5&6 - 啓動時自動載入properties的檔案

通常如果要載入一個.properties的檔案,應該盡量不要放在System.getProperties() 因為這是提供給整個JVM instance系統在用的變數。

我的建議是properties的檔案,還是另外放比較好拉!然後再讀進來。
讀取的方式,有好幾種,(如果,properties檔案名稱叫test.properties,)

1), 用load Properties的方式放進來

Properties instance = new Properties();
instance.load(Thread.currentThread().getContextClassLoader().getResourceAsStream("testprops.properties"));
  
String value = instance.getProperty(keyName);

2), 用Resource Bundle的方式放進來(比較推薦這種)
ResourceBundle resource = ResourceBundle.getBundle("testprops",locale);
resource.getString(keyName)

在JBoss EAP 5

只要把properties的檔案放在$JBoss_INSTALL_Path/server/$profile/conf 就可以直接在上述的地方直接寫上properties的名字就好。

在JBoss EAP 6

最簡單的方法就是將整個路徑指定到  FileInputStream 的位置,
InputStream inStream = new FileInputStream("/opt/config/testprops.properties");
Properties instance = new Properties();
instance.load(inStream);

但是這樣上述直接去讀取config下properties檔案的方式就不能用了。要使用ResourceBundle 就需去設定JBoss 啓動時自動去讀取的模組。
設定模組的方式很簡單,

1. 請先到$JBoss_INSTALL_PATH 下的modules下建立路徑 conf/main/properties
2. 到新建立的路徑conf/main下,建立modules.xml

    
        
    

3.把你的properties檔案放到,剛剛新建立的conf/main/properties 路徑下。
4.把模組指定到EE會自動讀取到global給所有部署系統可以看見的參數下。(有兩種方式,選一種就好)

使用Web Console 方式
(這裡是使用standalone模式,如果你是用domain, 請記得去你要修改的profile裡改啊!)

右上方選擇profile,左邊選單選擇container下的ee, 在Global Modules選擇Add


寫上conf (我們剛剛建立的模組名稱)


完成後就會看到如下的設定,記得重開Server.


直接改XML方式

如果你是使用standalone模式,請改standalone(-*).xml ,如果是domain mode請改domain.xml (請記得去你要修改的profile裡改啊~)
找到ee的subsystem,

....


然後加入全域模組<module name="conf" slot="main" /> 如下
            
  
                
  


以上,是正確讀取properties檔案的方式。

但是。。。。。如果你的系統,前人已經寫了System.getProperties()的方式,除了詛咒他,因為他的寫法,害你要每台都去管理propertie檔案,改寫code 之外,還是可以去設定讀到System之下的。(雖然我強烈建議你就摸摸鼻子改寫吧!)

在JBoss EAP 5
在啓動的script裡面,加上-P 的讀取方式,(-P檔案位置) 如...
./run.sh -c testProps -P/opt/config/test.properties

在JBoss EAP 6

在啓動的script裡面(standalone 或 domain),加上--properties 的讀取方式,(--properties=檔案位置) 如...
./standalone.sh --properties=/opt/config/test.properties

當然,最好也可以在系統中,直接設定參數,這樣彈性比較大。
Web Console 設定位置,
左邊選擇profile, 右邊選單選擇System Properties, 選擇Add

XML 設定位置,
Standalone, 改standalone(-*).xml , domain 改domain.xml>。
在extensions 與 management 中間新增system-properties如下
....



  


....

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