使用NetBeans6开发OSGi应用(2)——SecondOSGi[88250原创]
转载请保留作者信息：
作者：88250
Blog：http:/blog.****.net/DL88250
MSN & Gmail & QQ：[email protected]
摘要
上一次，我们了解了OSGi的背景并使用NetBeans6，基于Knopflerfish（OSGi的一个RI） 完成了第一个OSGi应用——FirstOSGi。这一次，我们将对OSGi进行深入一点学习——SecondOSGi，让我们掌握Bundles之间的调用！准备
同上一次 :-)开工：
1. 创建工程
打开NetBeans6 IDE，创建两个普通的Java App——SecondOSGi、SecondOSGiClient。把KF下的Sources拷贝到两个工程下（记得加入asm3.0的Jar）：在SecondOSGiClient工程的demo包下的两个Java文件（Demo.java, DemoFactory.java）与SecondOSGi工程demo包下的完全一样，这里是懒得发布编译好的class byte file给Client了，直接给的接口源文件。
2. 编写manifest.mf
把工程View切换到Files，改写manifest.mf如下：关于manifest.mf里各种properties就不罗嗦了，有很多文档可以参考 :-)
3. 编写Activator
下面逐一给出源文件，一一对应上面工程结构图。service提供者，即SecondOSGi工程下的：
/*
*@(#)Demo.java
*
*Thisprogramisfreesoftware;youcanredistributeitand/ormodify
*itunderthetermsoftheGNUGeneralPublicLicenseaspublishedby
*theFreeSoftwareFoundation;eitherversion3oftheLicense,or
*(atyouroption)anylaterversion.
*
*Thisprogramisdistributedinthehopethatitwillbeuseful,
*butWITHOUTANYWARRANTY;withouteventheimpliedwarrantyof
*MERCHANTABILITYorFITNESSFORAPARTICULARPURPOSE.Seethe
*GNULibraryGeneralPublicLicenseformoredetails.
*
*YoushouldhavereceivedacopyoftheGNUGeneralPublicLicense
*alongwiththisprogram;ifnot,writetotheFreeSoftware
*Foundation,Inc.,59TemplePlace-Suite330,Boston,MA02111-1307,USA.
*/
packagesecondosgi.service.demo;
/**
*Asimpledemoservice.
*@author88250
*@version1.0.0.0,Feb14,2008
*/
publicinterfaceDemo{
/**
*Addtwointegersandreturntheresult.
*@parama
*@paramb
*@return
*/
publicintadd(inta,intb);
}
*@(#)Demo.java
*
*Thisprogramisfreesoftware;youcanredistributeitand/ormodify
*itunderthetermsoftheGNUGeneralPublicLicenseaspublishedby
*theFreeSoftwareFoundation;eitherversion3oftheLicense,or
*(atyouroption)anylaterversion.
*
*Thisprogramisdistributedinthehopethatitwillbeuseful,
*butWITHOUTANYWARRANTY;withouteventheimpliedwarrantyof
*MERCHANTABILITYorFITNESSFORAPARTICULARPURPOSE.Seethe
*GNULibraryGeneralPublicLicenseformoredetails.
*
*YoushouldhavereceivedacopyoftheGNUGeneralPublicLicense
*alongwiththisprogram;ifnot,writetotheFreeSoftware
*Foundation,Inc.,59TemplePlace-Suite330,Boston,MA02111-1307,USA.
*/
packagesecondosgi.service.demo;
/**
*Asimpledemoservice.
*@author88250
*@version1.0.0.0,Feb14,2008
*/
publicinterfaceDemo{
/**
*Addtwointegersandreturntheresult.
*@parama
*@paramb
*@return
*/
publicintadd(inta,intb);
}
/*
*@(#)DemoFactory.java
*
*Thisprogramisfreesoftware;youcanredistributeitand/ormodify
*itunderthetermsoftheGNUGeneralPublicLicenseaspublishedby
*theFreeSoftwareFoundation;eitherversion3oftheLicense,or
*(atyouroption)anylaterversion.
*
*Thisprogramisdistributedinthehopethatitwillbeuseful,
*butWITHOUTANYWARRANTY;withouteventheimpliedwarrantyof
*MERCHANTABILITYorFITNESSFORAPARTICULARPURPOSE.Seethe
*GNULibraryGeneralPublicLicenseformoredetails.
*
*YoushouldhavereceivedacopyoftheGNUGeneralPublicLicense
*alongwiththisprogram;ifnot,writetotheFreeSoftware
*Foundation,Inc.,59TemplePlace-Suite330,Boston,MA02111-1307,USA.
*/
packagesecondosgi.service.demo;
/**
*<b>Another</b>verysimpledemoserviceAPI.
*<p>
*Theintentionsofthisinterfaceclassistoshowthatdifferentbundles
*willgetdifferentinstancesofaservice,bythemeansofa
*ServiceFactory.
*</p>
*@author88250
*@version1.0.0.0,Feb14,2008
*/
publicinterfaceDemoFactory{
/**
*Sayhello.
*/
voidhello();
}
*@(#)DemoFactory.java
*
*Thisprogramisfreesoftware;youcanredistributeitand/ormodify
*itunderthetermsoftheGNUGeneralPublicLicenseaspublishedby
*theFreeSoftwareFoundation;eitherversion3oftheLicense,or
*(atyouroption)anylaterversion.
*
*Thisprogramisdistributedinthehopethatitwillbeuseful,
*butWITHOUTANYWARRANTY;withouteventheimpliedwarrantyof
*MERCHANTABILITYorFITNESSFORAPARTICULARPURPOSE.Seethe
*GNULibraryGeneralPublicLicenseformoredetails.
*
*YoushouldhavereceivedacopyoftheGNUGeneralPublicLicense
*alongwiththisprogram;ifnot,writetotheFreeSoftware
*Foundation,Inc.,59TemplePlace-Suite330,Boston,MA02111-1307,USA.
*/
packagesecondosgi.service.demo;
/**
*<b>Another</b>verysimpledemoserviceAPI.
*<p>
*Theintentionsofthisinterfaceclassistoshowthatdifferentbundles
*willgetdifferentinstancesofaservice,bythemeansofa
*ServiceFactory.
*</p>
*@author88250
*@version1.0.0.0,Feb14,2008
*/
publicinterfaceDemoFactory{
/**
*Sayhello.
*/
voidhello();
}
/*
*@(#)DemoImpl.java
*
*Thisprogramisfreesoftware;youcanredistributeitand/ormodify
*itunderthetermsoftheGNUGeneralPublicLicenseaspublishedby
*theFreeSoftwareFoundation;eitherversion3oftheLicense,or
*(atyouroption)anylaterversion.
*
*Thisprogramisdistributedinthehopethatitwillbeuseful,
*butWITHOUTANYWARRANTY;withouteventheimpliedwarrantyof
*MERCHANTABILITYorFITNESSFORAPARTICULARPURPOSE.Seethe
*GNULibraryGeneralPublicLicenseformoredetails.
*
*YoushouldhavereceivedacopyoftheGNUGeneralPublicLicense
*alongwiththisprogram;ifnot,writetotheFreeSoftware
*Foundation,Inc.,59TemplePlace-Suite330,Boston,MA02111-1307,USA.
*/
packagesecondosgi.service.demo.impl;
importsecondosgi.service.demo.Demo;
/**
*ImplementationoftheDemoservice.
*@author88250
*@version1.0.0.0,Feb14,2008
*/
publicclassDemoImplimplementsDemo{
publicintadd(inta,intb){
returna+b;
}
}
*@(#)DemoImpl.java
*
*Thisprogramisfreesoftware;youcanredistributeitand/ormodify
*itunderthetermsoftheGNUGeneralPublicLicenseaspublishedby
*theFreeSoftwareFoundation;eitherversion3oftheLicense,or
*(atyouroption)anylaterversion.
*
*Thisprogramisdistributedinthehopethatitwillbeuseful,
*butWITHOUTANYWARRANTY;withouteventheimpliedwarrantyof
*MERCHANTABILITYorFITNESSFORAPARTICULARPURPOSE.Seethe
*GNULibraryGeneralPublicLicenseformoredetails.
*
*YoushouldhavereceivedacopyoftheGNUGeneralPublicLicense
*alongwiththisprogram;ifnot,writetotheFreeSoftware
*Foundation,Inc.,59TemplePlace-Suite330,Boston,MA02111-1307,USA.
*/
packagesecondosgi.service.demo.impl;
importsecondosgi.service.demo.Demo;
/**
*ImplementationoftheDemoservice.
*@author88250
*@version1.0.0.0,Feb14,2008
*/
publicclassDemoImplimplementsDemo{
publicintadd(inta,intb){
returna+b;
}
}
/*
*@(#)DemoFactoryImpl.java
*
*Thisprogramisfreesoftware;youcanredistributeitand/ormodify
*itunderthetermsoftheGNUGeneralPublicLicenseaspublishedby
*theFreeSoftwareFoundation;eitherversion3oftheLicense,or
*(atyouroption)anylaterversion.
*
*Thisprogramisdistributedinthehopethatitwillbeuseful,
*butWITHOUTANYWARRANTY;withouteventheimpliedwarrantyof
*MERCHANTABILITYorFITNESSFORAPARTICULARPURPOSE.Seethe
*GNULibraryGeneralPublicLicenseformoredetails.
*
*YoushouldhavereceivedacopyoftheGNUGeneralPublicLicense
*alongwiththisprogram;ifnot,writetotheFreeSoftware
*Foundation,Inc.,59TemplePlace-Suite330,Boston,MA02111-1307,USA.
*/
packagesecondosgi.service.demo.impl;
importsecondosgi.service.demo.DemoFactory;
importorg.osgi.framework.Bundle;
/**
*ImplementationoftheDemoFactoryservice.Theintentionsofthis
*classistoshowthatdifferentbundleswillgetdifferentinstances
*ofaservice,bythemeansofaServiceFactory.
*@author88250
*@version1.0.0.0,Feb14,2008
*/
publicclassDemoFactoryImplimplementsDemoFactory{
privateBundleb;
/**
*Constructorwithargument.
*@paramba<code>Bundle</code>
*/
publicDemoFactoryImpl(Bundleb){
this.b=b;
}
publicvoidhello(){
System.out.println("Hellobundle#"+b.getBundleId());
}
}
*@(#)DemoFactoryImpl.java
*
*Thisprogramisfreesoftware;youcanredistributeitand/ormodify
*itunderthetermsoftheGNUGeneralPublicLicenseaspublishedby
*theFreeSoftwareFoundation;eitherversion3oftheLicense,or
*(atyouroption)anylaterversion.
*
*Thisprogramisdistributedinthehopethatitwillbeuseful,
*butWITHOUTANYWARRANTY;withouteventheimpliedwarrantyof
*MERCHANTABILITYorFITNESSFORAPARTICULARPURPOSE.Seethe
*GNULibraryGeneralPublicLicenseformoredetails.
*
*YoushouldhavereceivedacopyoftheGNUGeneralPublicLicense
*alongwiththisprogram;ifnot,writetotheFreeSoftware
*Foundation,Inc.,59TemplePlace-Suite330,Boston,MA02111-1307,USA.
*/
packagesecondosgi.service.demo.impl;
importsecondosgi.service.demo.DemoFactory;
importorg.osgi.framework.Bundle;
/**
*ImplementationoftheDemoFactoryservice.Theintentionsofthis
*classistoshowthatdifferentbundleswillgetdifferentinstances
*ofaservice,bythemeansofaServiceFactory.
*@author88250
*@version1.0.0.0,Feb14,2008
*/
publicclassDemoFactoryImplimplementsDemoFactory{
privateBundleb;
/**
*Constructorwithargument.
*@paramba<code>Bundle</code>
*/
publicDemoFactoryImpl(Bundleb){
this.b=b;
}
publicvoidhello(){
System.out.println("Hellobundle#"+b.getBundleId());
}
}
很关键的Activator，实现服务的注册，注销：
/*
*@(#)Activator.java
*
*Thisprogramisfreesoftware;youcanredistributeitand/ormodify
*itunderthetermsoftheGNUGeneralPublicLicenseaspublishedby
*theFreeSoftwareFoundation;eitherversion3oftheLicense,or
*(atyouroption)anylaterversion.
*
*Thisprogramisdistributedinthehopethatitwillbeuseful,
*butWITHOUTANYWARRANTY;withouteventheimpliedwarrantyof
*MERCHANTABILITYorFITNESSFORAPARTICULARPURPOSE.Seethe
*GNULibraryGeneralPublicLicenseformoredetails.
*
*YoushouldhavereceivedacopyoftheGNUGeneralPublicLicense
*alongwiththisprogram;ifnot,writetotheFreeSoftware
*Foundation,Inc.,59TemplePlace-Suite330,Boston,MA02111-1307,USA.
*/
packagesecondosgi.service.demo.impl;
importsecondosgi.service.demo.Demo;
importsecondosgi.service.demo.DemoFactory;
importjava.util.Hashtable;
importorg.osgi.framework.Bundle;
importorg.osgi.framework.BundleActivator;
importorg.osgi.framework.BundleContext;
importorg.osgi.framework.ServiceFactory;
importorg.osgi.framework.ServiceRegistration;
/**
*ActivatorwhichcreatesandregistersaDemo1service.
*@author88250
*@version1.0.0.0,Feb14,2008
*/
publicclassActivatorimplementsBundleActivator{
privateDemodemo;
publicvoidstart(BundleContextbc){
System.out.println("start"+getClass().getName());
demo=newDemoImpl();
bc.registerService(Demo.class.getName(),
demo,
newHashtable());
//CreateaservicefactoryforDemoFactoryimplementations
ServiceFactoryfactory=newServiceFactory(){
Hashtableservices=newHashtable();
//Willgetcalledwhenabundlerequestaservice
@SuppressWarnings("unchecked")
publicObjectgetService(Bundleb,
ServiceRegistrationreg){
System.out.println("getfrom"+b.getBundleId());
//Createwhennecessary
DemoFactoryimpl=(DemoFactory)services.get(b);
if(impl==null){
impl=newDemoFactoryImpl(b);
services.put(b,impl);
}
returnimpl;
}
//willgetcalledwhenabundleungetsaserviceorstops
publicvoidungetService(Bundleb,
ServiceRegistrationreg,
Objectservice){
System.out.println("ungetfrom"+b.getBundleId());
services.remove(b);
}
};
//NotehowfactoryonlyimplementsServiceFactory,
//butwestillregisterasDemoFactory1service
bc.registerService(DemoFactory.class.getName(),
factory,
newHashtable());
}
publicvoidstop(BundleContextbc){
System.out.println("stop"+getClass().getName());
demo=null;
}
}
*@(#)Activator.java
*
*Thisprogramisfreesoftware;youcanredistributeitand/ormodify
*itunderthetermsoftheGNUGeneralPublicLicenseaspublishedby
*theFreeSoftwareFoundation;eitherversion3oftheLicense,or
*(atyouroption)anylaterversion.
*
*Thisprogramisdistributedinthehopethatitwillbeuseful,
*butWITHOUTANYWARRANTY;withouteventheimpliedwarrantyof
*MERCHANTABILITYorFITNESSFORAPARTICULARPURPOSE.Seethe
*GNULibraryGeneralPublicLicenseformoredetails.
*
*YoushouldhavereceivedacopyoftheGNUGeneralPublicLicense
*alongwiththisprogram;ifnot,writetotheFreeSoftware
*Foundation,Inc.,59TemplePlace-Suite330,Boston,MA02111-1307,USA.
*/
packagesecondosgi.service.demo.impl;
importsecondosgi.service.demo.Demo;
importsecondosgi.service.demo.DemoFactory;
importjava.util.Hashtable;
importorg.osgi.framework.Bundle;
importorg.osgi.framework.BundleActivator;
importorg.osgi.framework.BundleContext;
importorg.osgi.framework.ServiceFactory;
importorg.osgi.framework.ServiceRegistration;
/**
*ActivatorwhichcreatesandregistersaDemo1service.
*@author88250
*@version1.0.0.0,Feb14,2008
*/
publicclassActivatorimplementsBundleActivator{
privateDemodemo;
publicvoidstart(BundleContextbc){
System.out.println("start"+getClass().getName());
demo=newDemoImpl();
bc.registerService(Demo.class.getName(),
demo,
newHashtable());
//CreateaservicefactoryforDemoFactoryimplementations
ServiceFactoryfactory=newServiceFactory(){
Hashtableservices=newHashtable();
//Willgetcalledwhenabundlerequestaservice
@SuppressWarnings("unchecked")
publicObjectgetService(Bundleb,
ServiceRegistrationreg){
System.out.println("getfrom"+b.getBundleId());
//Createwhennecessary
DemoFactoryimpl=(DemoFactory)services.get(b);
if(impl==null){
impl=newDemoFactoryImpl(b);
services.put(b,impl);
}
returnimpl;
}
//willgetcalledwhenabundleungetsaserviceorstops
publicvoidungetService(Bundleb,
ServiceRegistrationreg,
Objectservice){
System.out.println("ungetfrom"+b.getBundleId());
services.remove(b);
}
};
//NotehowfactoryonlyimplementsServiceFactory,
//butwestillregisterasDemoFactory1service
bc.registerService(DemoFactory.class.getName(),
factory,
newHashtable());
}
publicvoidstop(BundleContextbc){
System.out.println("stop"+getClass().getName());
demo=null;
}
}
client角色，服务使用者，即SecondOSGiClient工程下的（Demo，DemoFactory两个接口同服务提供的）。
在这个Activator里，我们实现了服务的查找、调用、服务提供者状态的监听：
/*
*@(#)Activator.java
*
*Thisprogramisfreesoftware;youcanredistributeitand/ormodify
*itunderthetermsoftheGNUGeneralPublicLicenseaspublishedby
*theFreeSoftwareFoundation;eitherversion3oftheLicense,or
*(atyouroption)anylaterversion.
*
*Thisprogramisdistributedinthehopethatitwillbeuseful,
*butWITHOUTANYWARRANTY;withouteventheimpliedwarrantyof
*MERCHANTABILITYorFITNESSFORAPARTICULARPURPOSE.Seethe
*GNULibraryGeneralPublicLicenseformoredetails.
*
*YoushouldhavereceivedacopyoftheGNUGeneralPublicLicense
*alongwiththisprogram;ifnot,writetotheFreeSoftware
*Foundation,Inc.,59TemplePlace-Suite330,Boston,MA02111-1307,USA.
*/
packagesecondosgi.service.client.impl;
importsecondosgi.service.demo.Demo;
importsecondosgi.service.demo.DemoFactory;
importorg.osgi.framework.BundleActivator;
importorg.osgi.framework.BundleContext;
importorg.osgi.framework.ServiceEvent;
importorg.osgi.framework.ServiceListener;
importorg.osgi.framework.ServiceReference;
/**
*Activatorwhichregistersalistenerfor,andtest,anyDemoservice.
*@author88250
*@version1.0.0.0,Feb14,2008
*/
publicclassActivatorimplementsBundleActivator,ServiceListener{
privatestaticBundleContextbc;
privateServiceListenerlistener;
publicvoidstart(BundleContextbc){
System.out.println("start"+getClass().getName());
Activator.bc=bc;
try{
//FilterthatmatchesallDemoservices
Stringfilter="(objectclass="+Demo.class.getName()+")";
//FetchallregisteredDemoservices
//andtestthemmanually
ServiceReference[]srl=
bc.getServiceReferences(Demo.class.getName(),filter);
for(inti=0;srl!=null&&i<srl.length;i++){
testService(srl[i]);
}
//...andcatchallnewlyregistedonestoo.
bc.addServiceListener(listener,filter);
}catch(Exceptione){
//soundsunlikely,butfiltersyntaxerrorsareeasytowrite.
e.printStackTrace();
}
testServiceFactory();
}
voidtestServiceFactory(){
//Trytogetareferencetotheserviceproducedbyafactory
ServiceReferencefactorySR=bc.getServiceReference(DemoFactory.class.getName());
if(factorySR!=null){
DemoFactorydf=(DemoFactory)bc.getService(factorySR);
if(df!=null){
//Differentbundleswillgetdifferentprintouts
df.hello();
}
}
}
voidtestService(ServiceReferencesr){
Demodemo=(Demo)bc.getService(sr);
intr=demo.add(140,1);
System.out.println("Testing"+demo+",result="+r);
//..returntheobjecttobenice
bc.ungetService(sr);
}
publicvoidstop(BundleContextbc){
System.out.println("stop"+getClass().getName());
Activator.bc=null;
}
publicvoidserviceChanged(ServiceEventevent){
ServiceReferencesr=event.getServiceReference();
//justprintsomeinfoandcalltestService()on
//allregisteredDemoservices
switch(event.getType()){
caseServiceEvent.REGISTERED:
System.out.println("GotDemoservice");
testService(sr);
break;
caseServiceEvent.UNREGISTERING:
System.out.println("LostDemoservice");
break;
caseServiceEvent.MODIFIED:
System.out.println("ModifiedDemoservice");
break;
default:
break;
}
}
}
*@(#)Activator.java
*
*Thisprogramisfreesoftware;youcanredistributeitand/ormodify
*itunderthetermsoftheGNUGeneralPublicLicenseaspublishedby
*theFreeSoftwareFoundation;eitherversion3oftheLicense,or
*(atyouroption)anylaterversion.
*
*Thisprogramisdistributedinthehopethatitwillbeuseful,
*butWITHOUTANYWARRANTY;withouteventheimpliedwarrantyof
*MERCHANTABILITYorFITNESSFORAPARTICULARPURPOSE.Seethe
*GNULibraryGeneralPublicLicenseformoredetails.
*
*YoushouldhavereceivedacopyoftheGNUGeneralPublicLicense
*alongwiththisprogram;ifnot,writetotheFreeSoftware
*Foundation,Inc.,59TemplePlace-Suite330,Boston,MA02111-1307,USA.
*/
packagesecondosgi.service.client.impl;
importsecondosgi.service.demo.Demo;
importsecondosgi.service.demo.DemoFactory;
importorg.osgi.framework.BundleActivator;
importorg.osgi.framework.BundleContext;
importorg.osgi.framework.ServiceEvent;
importorg.osgi.framework.ServiceListener;
importorg.osgi.framework.ServiceReference;
/**
*Activatorwhichregistersalistenerfor,andtest,anyDemoservice.
*@author88250
*@version1.0.0.0,Feb14,2008
*/
publicclassActivatorimplementsBundleActivator,ServiceListener{
privatestaticBundleContextbc;
privateServiceListenerlistener;
publicvoidstart(BundleContextbc){
System.out.println("start"+getClass().getName());
Activator.bc=bc;
try{
//FilterthatmatchesallDemoservices
Stringfilter="(objectclass="+Demo.class.getName()+")";
//FetchallregisteredDemoservices
//andtestthemmanually
ServiceReference[]srl=
bc.getServiceReferences(Demo.class.getName(),filter);
for(inti=0;srl!=null&&i<srl.length;i++){
testService(srl[i]);
}
//...andcatchallnewlyregistedonestoo.
bc.addServiceListener(listener,filter);
}catch(Exceptione){
//soundsunlikely,butfiltersyntaxerrorsareeasytowrite.
e.printStackTrace();
}
testServiceFactory();
}
voidtestServiceFactory(){
//Trytogetareferencetotheserviceproducedbyafactory
ServiceReferencefactorySR=bc.getServiceReference(DemoFactory.class.getName());
if(factorySR!=null){
DemoFactorydf=(DemoFactory)bc.getService(factorySR);
if(df!=null){
//Differentbundleswillgetdifferentprintouts
df.hello();
}
}
}
voidtestService(ServiceReferencesr){
Demodemo=(Demo)bc.getService(sr);
intr=demo.add(140,1);
System.out.println("Testing"+demo+",result="+r);
//..returntheobjecttobenice
bc.ungetService(sr);
}
publicvoidstop(BundleContextbc){
System.out.println("stop"+getClass().getName());
Activator.bc=null;
}
publicvoidserviceChanged(ServiceEventevent){
ServiceReferencesr=event.getServiceReference();
//justprintsomeinfoandcalltestService()on
//allregisteredDemoservices
switch(event.getType()){
caseServiceEvent.REGISTERED:
System.out.println("GotDemoservice");
testService(sr);
break;
caseServiceEvent.UNREGISTERING:
System.out.println("LostDemoservice");
break;
caseServiceEvent.MODIFIED:
System.out.println("ModifiedDemoservice");
break;
default:
break;
}
}
}
4. 测试
打开KF控制中心：
[email protected]:~/Work/knopflerfish_osgi_2.0.4/knopflerfish.org/osgi$java-jarframework.jar
打开构建好的SecondOSGi.jar以及SecondOSGiClient.jar，运行！
总结
这一次，我们对OSGi的了解更深了一步。
从设计的角度：一个可扩展的Service-Oriented组件服务模型
然后，进入KF的安装目录，启动我们的应用：
![使用NetBeans6开发OSGi应用(2)——SecondOSGi[88250原创]](/default/index/img?u=aHR0cHM6Ly9waWFuc2hlbi5jb20vaW1hZ2VzLzI3MS83NzVjMjA4Njk2YmYzMTQxMTg1YWJiYWFiNTJjNTQ0Zi5wbmc= "使用NetBeans6开发OSGi应用(2)——SecondOSGi[88250原创]")
现在，我们只是脱离了KF的图形界面控制中心，在命令行下面启动的KF框架，并把SecondOSGi与SeondOSGiClient安装运行在KF框架里。一切的主动权还是在KF手里。
结合以前JavaEE的实践，JSP/Servlets，EJBs不都是被控制在容器（container）里的吗？
不过，话又说回来了，我希望自己的框架应用构建于OSGi之上，而不是之内。
之内的部分应该是可扩展的Plug-ins部分，让OSGi作为底层框架，为我们提供稳定的插件机制。
之外的部分应该是我们应用的框架，构建在OSGi之上。对OSGi做一个封装，就KF而言，就是封装它的命令接口，让我们的框架可以对插件随时安装、卸载、运行、停止、更新。。。。
当然，以上是个设想，学习OSGi第二天的设想。。。。
总之不足的地方很多，要把这个示例慢慢演化成正真具有价值的应用可能还需要一些时间。
从设计的角度：一个可扩展的Service-Oriented组件服务模型
从开发的角度：我们发布接口给客户，实现了“针对接口编程”的OO核心实践
不足之处
我们一直都是在KF的控制台下启动的应用，如何做成独立的（standalone）可运行的Jar发布呢？1. 在命令行下启动OSGi框架
首先，编写一个启动参数文件：secondosgi.xargs-launch
-istart/home/daniel/Work/Sources/Java/SecondOSGi/dist/SecondOSGi.jar
-istart/home/daniel/Work/Sources/Java/SecondOSGiClient/dist/SecondOSGiClient.jar
-istart/home/daniel/Work/Sources/Java/SecondOSGi/dist/SecondOSGi.jar
-istart/home/daniel/Work/Sources/Java/SecondOSGiClient/dist/SecondOSGiClient.jar
然后，进入KF的安装目录，启动我们的应用：
现在，我们只是脱离了KF的图形界面控制中心，在命令行下面启动的KF框架，并把SecondOSGi与SeondOSGiClient安装运行在KF框架里。一切的主动权还是在KF手里。
结合以前JavaEE的实践，JSP/Servlets，EJBs不都是被控制在容器（container）里的吗？
不过，话又说回来了，我希望自己的框架应用构建于OSGi之上，而不是之内。
之内的部分应该是可扩展的Plug-ins部分，让OSGi作为底层框架，为我们提供稳定的插件机制。
之外的部分应该是我们应用的框架，构建在OSGi之上。对OSGi做一个封装，就KF而言，就是封装它的命令接口，让我们的框架可以对插件随时安装、卸载、运行、停止、更新。。。。
当然，以上是个设想，学习OSGi第二天的设想。。。。
总之不足的地方很多，要把这个示例慢慢演化成正真具有价值的应用可能还需要一些时间。