Fix realm service unbinding issues

components/apimgt-extensions/io.entgra.device.mgt.core.apimgt.application.extension/src/main/java/io/entgra/device/mgt/core/apimgt/application/extension/internal/APIApplicationManagerExtensionDataHolder.java

@@ -68,17 +68,18 @@ public class APIApplicationManagerExtensionDataHolder {
 
     public void setRealmService(RealmService realmService) {
         this.realmService = realmService;
-        this.setTenantManager(realmService);
+        setTenantManager(realmService != null ?
+                realmService.getTenantManager() : null);
     }
 
-    private void setTenantManager(RealmService realmService) {
-        if (realmService == null) {
-            throw new IllegalStateException("Realm service is not initialized properly");
-        }
-        this.tenantManager = realmService.getTenantManager();
+    private void setTenantManager(TenantManager tenantManager) {
+        this.tenantManager = tenantManager;
     }
 
     public TenantManager getTenantManager() {
+        if (tenantManager == null) {
+            throw new IllegalStateException("Tenant manager is not initialized properly");
+        }
         return tenantManager;
     }
 

components/apimgt-extensions/io.entgra.device.mgt.core.apimgt.webapp.publisher/src/main/java/io/entgra/device/mgt/core/apimgt/webapp/publisher/internal/APIPublisherDataHolder.java

@@ -75,17 +75,18 @@ public class APIPublisherDataHolder {
 
     public void setRealmService(RealmService realmService) {
         this.realmService = realmService;
-        this.setTenantManager(realmService);
+        setTenantManager(realmService != null ?
+                realmService.getTenantManager() : null);
     }
 
-    private void setTenantManager(RealmService realmService) {
-        if (realmService == null) {
-            throw new IllegalStateException("Realm service is not initialized properly");
-        }
-        this.tenantManager = realmService.getTenantManager();
+    private void setTenantManager(TenantManager tenantManager) {
+        this.tenantManager = tenantManager;
     }
 
     public TenantManager getTenantManager() {
+        if (tenantManager == null) {
+            throw new IllegalStateException("Tenant manager is not initialized properly");
+        }
         return tenantManager;
     }
 

components/identity-extensions/io.entgra.device.mgt.core.identity.jwt.client.extension/src/main/java/io/entgra/device/mgt/core/identity/jwt/client/extension/internal/JWTClientExtensionDataHolder.java

@@ -74,17 +74,18 @@ public class JWTClientExtensionDataHolder {
 
 	public void setRealmService(RealmService realmService) {
 		this.realmService = realmService;
-		this.setTenantManager(realmService);
+		setTenantManager(realmService != null ?
+				realmService.getTenantManager() : null);
 	}
 
-	private void setTenantManager(RealmService realmService) {
-		if (realmService == null) {
-			throw new IllegalStateException("Realm service is not initialized properly");
-		}
-		this.tenantManager = realmService.getTenantManager();
+	private void setTenantManager(TenantManager tenantManager) {
+		this.tenantManager = tenantManager;
 	}
 
 	public TenantManager getTenantManager() {
+		if (tenantManager == null) {
+			throw new IllegalStateException("Tenant manager is not initialized properly");
+		}
 		return tenantManager;
 	}
 }