Osgi practical learning path: 7. ServiceListener of Service-2, osgiservice-2

Osgi practical learning path: 7. ServiceListener of Service-2, osgiservice-2
Three statuses of ServiceListener:

ServiceEvent.REGISTEREDServiceEvent.MODIFIEDServiceEvent.UNREGISTERING

Service search demo Based on ServiceListener

Provider

Student-manage/Activator. java

Package com. demo. service; import java. util. dictionary; import java. util. hashMap; import java. util. hashtable; import java. util. map; import org. osgi. framework. bundleActivator; import org. osgi. framework. bundleContext; import com. demo. service. impl. studentManageA; import com. demo. service. impl. studentManageB; public class Activator implements BundleActivator {public void start (BundleContext context) throws Exception {System. out. println ("registration service starts .... "); // register BSystem. out. println ("Register Service B .... "); Hashtable <String, String> dict = new Hashtable <String, String> (); dict. put ("name", "B"); context. registerService (IStudentManage. class. getName (), new StudentManageB (), dict); // register ASystem. out. println ("Register Service .... "); dict = new Hashtable <String, String> (); dict. put ("name", "a"); context. registerService (IStudentManage. class. getName (), new StudentManageA (), dict); System. out. println ("registration service ends .... ");} public void stop (BundleContext context) throws Exception {}}

Consumer

Student-action/Activator. java

Package com. demo. action; import java. util. sortedSet; import java. util. treeSet; import org. osgi. framework. bundleActivator; import org. osgi. framework. bundleContext; import org. osgi. framework. constants; import org. osgi. framework. serviceEvent; import org. osgi. framework. serviceFactory; import org. osgi. framework. serviceListener; import org. osgi. framework. serviceReference; import org. osgi. service. log. logService; imp Ort com. demo. service. IStudentManage; public class Activator implements BundleActivator {BundleContext context; UserManagerListener listener; public void start (BundleContext context) throws Exception {System. out. println ("action listener begin... "); this. context = context; listener = new UserManagerListener (); System. out. println ("service call ----------------"); synchronized (listener) {String filter = "(" + Constant S. OBJECTCLASS + "=" + IStudentManage. class. getName () + ")"; context. addServiceListener (listener, filter); ServiceReference [] refs = context. getServiceReferences (null, filter); if (refs! = Null) {for (ServiceReference r: refs) {listener. serviceChanged (new ServiceEvent (ServiceEvent. REGISTERED, r) ;}}// search for ServiceIStudentManage studentManage = listener. getStudentManageService (); // call the service studentManage. add (); System. out. println ("action listener end... ");} public void stop (BundleContext context) throws Exception {}// listener class UserManagerListener implements ServiceListener {SortedSet <ServiceReference> studentManageRefs = new TreeSet <ServiceReference> (); public synchronized void serviceChanged (ServiceEvent event) {switch (event. getType () {case ServiceEvent. REGISTERED: studentManageRefs. add (event. getServiceReference (); break; case ServiceEvent. MODIFIED: break; case ServiceEvent. UNREGISTERING: studentManageRefs. remove (event. getServiceReference (); break; default: break;}/** Search Service * @ return IStudentManage */public synchronized IStudentManage getStudentManageService () {if (studentManageRefs. size ()> 0) {System. out. println ("size:" + studentManageRefs. size (); return (IStudentManage) context. getService (studentManageRefs. last () ;}return null ;}}}

Result:

How to Use eclipse Equinox for OSGI and webService integration? What methods do you have to talk about?

If you create a web service, you can directly use its built-in components. If you generate a client based on WSDL, you can also create a web service client based on its components, enter the WSDL address, and then click Next.

After I upgrade Windows 7 Service pack 1 to Service pack 2, the system will be restored to Service pack 1 and cannot be upgraded to Service pack 2.

Microsoft does not have SP2 on its official website. I do not know where your SP2 came from,