add file storage management service

java/com.sap.sailing.domain.racelogtrackingadapter.testsupport/src/com/sap/sailing/domain/racelog/tracking/test/mock/MockEmptyServiceFinder.java

@@ -1,5 +1,8 @@
 package com.sap.sailing.domain.racelog.tracking.test.mock;
 
+import java.util.Collections;
+import java.util.Set;
+
 import com.sap.sse.common.NoCorrespondingServiceRegisteredException;
 import com.sap.sse.common.TypeBasedServiceFinder;
 
@@ -16,4 +19,8 @@ public class MockEmptyServiceFinder<ServiceType> implements TypeBasedServiceFind
         this.fallback = fallback;
     }
 
+    @Override
+    public Set<ServiceType> findAllServices() {
+        return Collections.singleton(fallback);
+    }
 }

java/com.sap.sailing.domain.racelogtrackingadapter.testsupport/src/com/sap/sailing/domain/racelog/tracking/test/mock/MockGPSFixMongoServiceFinder.java

@@ -1,5 +1,9 @@
 package com.sap.sailing.domain.racelog.tracking.test.mock;
 
+import java.util.Arrays;
+import java.util.HashSet;
+import java.util.Set;
+
 import com.sap.sailing.domain.persistence.impl.DomainObjectFactoryImpl;
 import com.sap.sailing.domain.persistence.impl.MongoObjectFactoryImpl;
 import com.sap.sailing.domain.persistence.racelog.tracking.GPSFixMongoHandler;
@@ -12,15 +16,22 @@ import com.sap.sse.common.TypeBasedServiceFinder;
 public class MockGPSFixMongoServiceFinder implements TypeBasedServiceFinder<GPSFixMongoHandler> {
     private final MongoObjectFactoryImpl mof = new MongoObjectFactoryImpl(null);
     private final DomainObjectFactoryImpl dof = new DomainObjectFactoryImpl(null, null);
+    private final GPSFixMongoHandler movingHandler = new GPSFixMovingMongoHandlerImpl(mof, dof);
+    private final GPSFixMongoHandler handler = new GPSFixMongoHandlerImpl(mof, dof);
 
     @Override
     public GPSFixMongoHandler findService(String fixType) {
-        if (fixType.equals(GPSFixMovingImpl.class.getName())) return new GPSFixMovingMongoHandlerImpl(mof, dof);
-        if (fixType.equals(GPSFixImpl.class.getName())) return new GPSFixMongoHandlerImpl(mof, dof);
+        if (fixType.equals(GPSFixMovingImpl.class.getName())) return movingHandler;
+        if (fixType.equals(GPSFixImpl.class.getName())) return handler;
         return null;
     }
 
     @Override
     public void setFallbackService(GPSFixMongoHandler fallback) {
     }
+    
+    @Override
+    public Set<GPSFixMongoHandler> findAllServices() {
+        return new HashSet<GPSFixMongoHandler>(Arrays.asList(movingHandler, handler));
+    }
 }

java/com.sap.sailing.domain.racelogtrackingadapter.testsupport/src/com/sap/sailing/domain/racelog/tracking/test/mock/MockServiceFinder.java

@@ -1,5 +1,8 @@
 package com.sap.sailing.domain.racelog.tracking.test.mock;
 
+import java.util.Collections;
+import java.util.Set;
+
 import com.sap.sse.common.TypeBasedServiceFinder;
 
 public class MockServiceFinder<T> implements TypeBasedServiceFinder<T> {
@@ -20,4 +23,9 @@ public class MockServiceFinder<T> implements TypeBasedServiceFinder<T> {
     public void setFallbackService(T fallback) {
         this.fallback = fallback;
     }
+    
+    @Override
+    public Set<T> findAllServices() {
+        return Collections.singleton(handler);
+    }
 }

java/com.sap.sailing.server.gateway.serialization/src/com/sap/sailing/server/gateway/serialization/racelog/tracking/impl/GPSFixJsonServiceFinder.java

@@ -1,5 +1,9 @@
 package com.sap.sailing.server.gateway.serialization.racelog.tracking.impl;
 
+import java.util.Arrays;
+import java.util.HashSet;
+import java.util.Set;
+
 import com.sap.sailing.domain.tracking.GPSFix;
 import com.sap.sailing.domain.tracking.GPSFixMoving;
 import com.sap.sailing.server.gateway.deserialization.impl.GPSFixJsonDeserializer;
@@ -15,11 +19,14 @@ import com.sap.sse.common.NoCorrespondingServiceRegisteredException;
 import com.sap.sse.common.TypeBasedServiceFinder;
 
 public class GPSFixJsonServiceFinder implements TypeBasedServiceFinder<GPSFixJsonHandler> {
-    private final GPSFixJsonHandler gpsFixHandler = new GPSFixJsonHandlerImpl<GPSFix>(new GPSFixJsonDeserializer(), new GPSFixJsonSerializer());
-    private final GPSFixJsonHandler gpsFixMovingHandler = new GPSFixJsonHandlerImpl<GPSFixMoving>(new GPSFixMovingJsonDeserializer(), new GPSFixMovingJsonSerializer());
-    private final GPSFixJsonHandler gpsFixNmeaDTOHandler = new GPSFixJsonHandlerImpl<GPSFix>(new GPSFixNmeaDTOJsonDeserializer(), new GPSFixNmeaDTOJsonSerializer());
-    private final GPSFixJsonHandler gpsFixMovingNmeaDTOHandler = new GPSFixJsonHandlerImpl<GPSFixMoving>(new GPSFixMovingNmeaDTOJsonDeserializer(), new GPSFixMovingNmeaDTOJsonSerializer());
-    
+    private final GPSFixJsonHandler gpsFixHandler = new GPSFixJsonHandlerImpl<GPSFix>(new GPSFixJsonDeserializer(),
+            new GPSFixJsonSerializer());
+    private final GPSFixJsonHandler gpsFixMovingHandler = new GPSFixJsonHandlerImpl<GPSFixMoving>(
+            new GPSFixMovingJsonDeserializer(), new GPSFixMovingJsonSerializer());
+    private final GPSFixJsonHandler gpsFixNmeaDTOHandler = new GPSFixJsonHandlerImpl<GPSFix>(
+            new GPSFixNmeaDTOJsonDeserializer(), new GPSFixNmeaDTOJsonSerializer());
+    private final GPSFixJsonHandler gpsFixMovingNmeaDTOHandler = new GPSFixJsonHandlerImpl<GPSFixMoving>(
+            new GPSFixMovingNmeaDTOJsonDeserializer(), new GPSFixMovingNmeaDTOJsonSerializer());
 
     @Override
     public GPSFixJsonHandler findService(String type) throws NoCorrespondingServiceRegisteredException {
@@ -33,13 +40,19 @@ public class GPSFixJsonServiceFinder implements TypeBasedServiceFinder<GPSFixJso
             return gpsFixMovingNmeaDTOHandler;
         }
         throw new NoCorrespondingServiceRegisteredException(
-                "Only handlers for GPSFix, GPSFixMoving, GPSFixNmeaDTO, GPSFixMovingNmeaDTO are registered",
-                type, GPSFixJsonHandler.class.getSimpleName());
+                "Only handlers for GPSFix, GPSFixMoving, GPSFixNmeaDTO, GPSFixMovingNmeaDTO are registered", type,
+                GPSFixJsonHandler.class.getSimpleName());
     }
 
     @Override
     public void setFallbackService(GPSFixJsonHandler fallback) {
-        
+
+    }
+
+    @Override
+    public Set<GPSFixJsonHandler> findAllServices() {
+        return new HashSet<GPSFixJsonHandler>(Arrays.asList(gpsFixHandler, gpsFixMovingHandler,
+                gpsFixMovingNmeaDTOHandler, gpsFixNmeaDTOHandler));
     }
 
 }

java/com.sap.sse.common/src/com/sap/sse/common/TypeBasedServiceFinder.java

@@ -1,5 +1,7 @@
 package com.sap.sse.common;
 
+import java.util.Set;
+
 
 /**
  * @author Fredrik Teschke
@@ -16,6 +18,8 @@ public interface TypeBasedServiceFinder<ServiceType> {
      * @throws NoCorrespondingServiceRegisteredException Thrown, if no service is registered for this type.
      */
     ServiceType findService(String type) throws NoCorrespondingServiceRegisteredException;
+
+    Set<ServiceType> findAllServices();
     
     /**
      * Sets a fallback service (optional), that is used if no service is registered for a {@code type}.

java/com.sap.sse.common/src/com/sap/sse/common/impl/SingleTypeBasedServiceFinderImpl.java

@@ -1,5 +1,8 @@
 package com.sap.sse.common.impl;
 
+import java.util.Collections;
+import java.util.Set;
+
 import com.sap.sse.common.NoCorrespondingServiceRegisteredException;
 import com.sap.sse.common.TypeBasedServiceFinder;
 
@@ -36,5 +39,9 @@ TypeBasedServiceFinder<ServiceType> {
     public void setFallbackService(ServiceType fallback) {
         this.fallback = fallback;
     }
-
+    
+    @Override
+    public Set<ServiceType> findAllServices() {
+        return Collections.singleton(service);
+    }
 }

java/com.sap.sse.filestorage.ui/META-INF/MANIFEST.MF

@@ -6,12 +6,14 @@ Bundle-Version: 1.0.0.qualifier
 Bundle-Vendor: SAP
 Bundle-Activator: com.sap.sse.filestorage.ui.server.Activator
 Bundle-RequiredExecutionEnvironment: JavaSE-1.7
-Import-Package: org.osgi.framework;version="1.3.0"
+Import-Package: org.osgi.framework;version="1.3.0",
+ org.osgi.util.tracker;version="1.5.1"
 Bundle-ActivationPolicy: lazy
 Bundle-ClassPath: WEB-INF/classes/
 Require-Bundle: javax.servlet;bundle-version="2.5.0",
  com.sap.sse.gwt,
  com.google.gwt.osgi;bundle-version="2.6.1",
  com.sap.sse.filestorage,
- com.sap.sse.common;bundle-version="1.0.0"
+ com.sap.sse.common;bundle-version="1.0.0",
+ com.sap.sse.osgi;bundle-version="1.0.0"
 Web-ContextPath: /filestorage/ui

java/com.sap.sse.filestorage.ui/src/main/java/com/sap/sse/filestorage/ui/client/FileStorageManagementService.java

@@ -1,20 +0,0 @@
-package com.sap.sse.filestorage.ui.client;
-
-import org.osgi.framework.InvalidSyntaxException;
-
-import com.google.gwt.user.client.rpc.RemoteService;
-import com.sap.sse.filestorage.InvalidPropertiesException;
-import com.sap.sse.filestorage.ui.shared.FileStorageServiceDTO;
-
-
-/**
- * For use with GWT for managing the file storage service to use.
- * @author Fredrik Teschke
- *
- */
-public interface FileStorageManagementService extends RemoteService {
-    FileStorageServiceDTO[] getAvailableFileStorageServices() throws InvalidSyntaxException;
-    void setFileStorageServiceProperty(String serviceName, String propertyName, String propertyValue);
-    void testFileStorageServiceProperties(String serviceName) throws InvalidPropertiesException;
-    void setFileStorageServiceToUse(String serviceName) throws InvalidPropertiesException;
-}

java/com.sap.sse.filestorage.ui/src/main/java/com/sap/sse/filestorage/ui/client/FileStorageRpcManagementService.java

@@ -0,0 +1,42 @@
+package com.sap.sse.filestorage.ui.client;
+
+import com.google.gwt.user.client.rpc.RemoteService;
+import com.sap.sse.common.NoCorrespondingServiceRegisteredException;
+import com.sap.sse.filestorage.InvalidPropertiesException;
+import com.sap.sse.filestorage.ui.shared.FileStorageServiceDTO;
+
+/**
+ * For use with GWT for managing the file storage service to use.
+ * 
+ * @author Fredrik Teschke
+ *
+ */
+public interface FileStorageRpcManagementService extends RemoteService {
+    FileStorageServiceDTO[] getAvailableFileStorageServices();
+
+    /**
+     * @throws NoCorrespondingServiceRegisteredException service may have disappeared from registry in the meantime
+     * @throws IllegalArgumentException if the property with name {@code propertyName} doesn't exist for the service
+     */
+    void setFileStorageServiceProperty(String serviceName, String propertyName, String propertyValue)
+            throws NoCorrespondingServiceRegisteredException, IllegalArgumentException;
+
+    /**
+     * @throws NoCorrespondingServiceRegisteredException service may have disappeared from registry in the meantime
+     * @throws InvalidPropertiesException is thrown if properties are not valid
+     */
+    void testFileStorageServiceProperties(String serviceName) throws NoCorrespondingServiceRegisteredException,
+            InvalidPropertiesException;
+
+    /**
+     * @throws NoCorrespondingServiceRegisteredException service may have disappeared from registry in the meantime
+     * @throws InvalidPropertiesException only a service with valid properties can be selected for usage
+     */
+    void setActiveFileStorageService(String serviceName) throws NoCorrespondingServiceRegisteredException,
+            InvalidPropertiesException;
+
+    /**
+     * @return may be {@code null}
+     */
+    String getActiveFileStorageServiceName();
+}

java/com.sap.sse.filestorage.ui/src/main/java/com/sap/sse/filestorage/ui/client/FileStorageRpcManagementServiceAsync.java

@@ -3,15 +3,17 @@ package com.sap.sse.filestorage.ui.client;
 import com.google.gwt.user.client.rpc.AsyncCallback;
 import com.sap.sse.filestorage.ui.shared.FileStorageServiceDTO;
 
-public interface FileStorageManagementServiceAsync {
+public interface FileStorageRpcManagementServiceAsync {
 
     void getAvailableFileStorageServices(AsyncCallback<FileStorageServiceDTO[]> callback);
 
     void setFileStorageServiceProperty(String serviceName, String propertyName, String propertyValue,
             AsyncCallback<Void> callback);
 
-    void setFileStorageServiceToUse(String serviceName, AsyncCallback<Void> callback);
+    void setActiveFileStorageService(String serviceName, AsyncCallback<Void> callback);
 
     void testFileStorageServiceProperties(String serviceName, AsyncCallback<Void> callback);
 
+    void getActiveFileStorageServiceName(AsyncCallback<String> callback);
+
 }

java/com.sap.sse.filestorage.ui/src/main/java/com/sap/sse/filestorage/ui/server/FileStorageManagementServiceImpl.java

@@ -1,51 +0,0 @@
-package com.sap.sse.filestorage.ui.server;
-
-import java.util.ArrayList;
-import java.util.List;
-
-import org.osgi.framework.BundleContext;
-import org.osgi.framework.InvalidSyntaxException;
-import org.osgi.framework.ServiceReference;
-
-import com.sap.sse.filestorage.FileStorageService;
-import com.sap.sse.filestorage.InvalidPropertiesException;
-import com.sap.sse.filestorage.ui.client.FileStorageManagementService;
-import com.sap.sse.filestorage.ui.shared.FileStorageServiceDTO;
-
-public class FileStorageManagementServiceImpl implements FileStorageManagementService {
-    private final BundleContext context;
-
-    public FileStorageManagementServiceImpl() {
-        this.context = Activator.getContext();
-    }
-
-    @Override
-    public FileStorageServiceDTO[] getAvailableFileStorageServices() throws InvalidSyntaxException {
-        List<FileStorageServiceDTO> serviceDtos = new ArrayList<>();
-        for (ServiceReference<FileStorageService> ref : context.getServiceReferences(FileStorageService.class, null)) {
-            FileStorageService service = context.getService(ref);
-            serviceDtos.add(FileStorageServiceDTO.convert(service));
-            context.ungetService(ref);
-        }
-        return serviceDtos.toArray(new FileStorageServiceDTO[0]);
-    }
-
-    @Override
-    public void setFileStorageServiceProperty(String serviceName, String propertyName, String propertyValue) {
-        // TODO Auto-generated method stub
-
-    }
-
-    @Override
-    public void testFileStorageServiceProperties(String serviceName) throws InvalidPropertiesException {
-        // TODO Auto-generated method stub
-
-    }
-
-    @Override
-    public void setFileStorageServiceToUse(String serviceName) throws InvalidPropertiesException {
-        // TODO Auto-generated method stub
-
-    }
-
-}

java/com.sap.sse.filestorage.ui/src/main/java/com/sap/sse/filestorage/ui/server/FileStorageRpcManagementServiceImpl.java

@@ -0,0 +1,56 @@
+package com.sap.sse.filestorage.ui.server;
+
+import java.util.ArrayList;
+import java.util.List;
+
+import org.osgi.framework.BundleContext;
+import org.osgi.util.tracker.ServiceTracker;
+
+import com.sap.sse.filestorage.FileStorageManagementService;
+import com.sap.sse.filestorage.FileStorageService;
+import com.sap.sse.filestorage.InvalidPropertiesException;
+import com.sap.sse.filestorage.ui.client.FileStorageRpcManagementService;
+import com.sap.sse.filestorage.ui.shared.FileStorageServiceDTO;
+
+public class FileStorageRpcManagementServiceImpl implements FileStorageRpcManagementService {
+    private final ServiceTracker<FileStorageManagementService, FileStorageManagementService> managementServiceTracker;
+
+    public FileStorageRpcManagementServiceImpl() {
+        BundleContext context = Activator.getContext();
+        managementServiceTracker = new ServiceTracker<>(context, FileStorageManagementService.class.getName(), null);
+        managementServiceTracker.open();
+    }
+    
+    private FileStorageManagementService getManagementService() {
+        return managementServiceTracker.getService();
+    }
+
+    @Override
+    public FileStorageServiceDTO[] getAvailableFileStorageServices() {
+        List<FileStorageServiceDTO> serviceDtos = new ArrayList<>();
+        for (FileStorageService s : getManagementService().getAvailableFileStorageServices()) {
+            serviceDtos.add(FileStorageServiceDTO.convert(s));
+        }
+        return serviceDtos.toArray(new FileStorageServiceDTO[0]);
+    }
+
+    @Override
+    public void setFileStorageServiceProperty(String serviceName, String propertyName, String propertyValue) {
+        getManagementService().setFileStorageServiceProperty(serviceName, propertyName, propertyValue);
+    }
+
+    @Override
+    public void testFileStorageServiceProperties(String serviceName) throws InvalidPropertiesException {
+        getManagementService().getFileStorageService(serviceName).testProperties();
+    }
+
+    @Override
+    public void setActiveFileStorageService(String serviceName) throws InvalidPropertiesException {
+        getManagementService().setActiveFileStorageService(getManagementService().getFileStorageService(serviceName));
+    }
+
+    @Override
+    public String getActiveFileStorageServiceName() {
+        return getManagementService().getActiveFileStorageService().getName();
+    }
+}

java/com.sap.sse.filestorage/META-INF/MANIFEST.MF

@@ -8,7 +8,8 @@ Bundle-RequiredExecutionEnvironment: JavaSE-1.8
 Export-Package: com.sap.sse.filestorage,
  com.sap.sse.filestorage.impl,
  com.sap.sse.filestorage.testsupport
-Import-Package: org.osgi.framework;version="1.8.0"
+Import-Package: com.sap.sse.osgi,
+ org.osgi.framework;version="1.8.0"
 Bundle-Activator: com.sap.sse.filestorage.impl.Activator
 Require-Bundle: org.apache.servicemix.bundles.aws-java-sdk;bundle-version="1.9.8",
  com.fasterxml.jackson.core.jackson-databind,

java/com.sap.sse.filestorage/src/com/sap/sse/filestorage/FileStorageManagementService.java

@@ -0,0 +1,36 @@
+package com.sap.sse.filestorage;
+
+import com.sap.sse.common.NoCorrespondingServiceRegisteredException;
+
+/**
+ * OSGi service for managing {@link FileStorageService FileStorageServices}.
+ * 
+ * @author Fredrik Teschke
+ *
+ */
+public interface FileStorageManagementService {
+    FileStorageService[] getAvailableFileStorageServices();
+    
+    FileStorageService getFileStorageService(String name);
+
+    /**
+     * Sets the property of the service, and also stores the property value so that it can be restored
+     * after a server restart.
+     * @throws NoCorrespondingServiceRegisteredException service may have disappeared from registry in the meantime
+     * @throws IllegalArgumentException if the property with name {@code propertyName} doesn't exist for the service
+     */
+    void setFileStorageServiceProperty(String serviceName, String propertyName, String propertyValue)
+            throws NoCorrespondingServiceRegisteredException, IllegalArgumentException;
+    
+    /**
+     * @return may be {@code null} if no service has been selected so far.
+     */
+    FileStorageService getActiveFileStorageService();
+
+    /**
+     * @throws InvalidPropertiesException
+     *             if the service properties are {@link FileStorageService#testProperties() invalid}. Then the old
+     *             active service (if any) remains active.
+     */
+    void setActiveFileStorageService(FileStorageService service) throws InvalidPropertiesException;
+}

java/com.sap.sse.filestorage/src/com/sap/sse/filestorage/FileStorageService.java

@@ -4,11 +4,13 @@ import java.io.IOException;
 import java.io.InputStream;
 import java.net.URI;
 
+import com.sap.sse.common.TypeBasedServiceFinder;
+
 /**
  * Service for storing files. The interface is intentionally agnostic of the underlying implementation, which may be
  * provided e.g. by using Amazon's S3 or simply saving the files to a statically reachable directory on one of our
  * servers. Implementations of this service are announced via the OSGi service registry. They should provide their name
- * as the OSGi property "name";
+ * as the OSGi property {@link TypeBasedServiceFinder#TYPE type};
  * 
  * TODO The storage service to use should be configured via the AdminConsole. Upon auto-discovering the available
  * services, the AdminConsole should allow to edit properties for each service (e.g. access credentials for AWS S3). We
@@ -34,6 +36,8 @@ public interface FileStorageService {
     Property[] getProperties();
 
     /**
+     * Should not be called directly, but through {@link FileStorageManagementService#setFileStorageServiceProperty}
+     * as this deals with storing the new values.
      * @throws IllegalArgumentException
      *             if {@code name} is not a valid property name
      */

java/com.sap.sse.filestorage/src/com/sap/sse/filestorage/impl/Activator.java

@@ -1,15 +1,30 @@
 package com.sap.sse.filestorage.impl;
 
+import java.util.Dictionary;
+import java.util.Hashtable;
+
 import org.osgi.framework.BundleActivator;
 import org.osgi.framework.BundleContext;
 
+import com.sap.sse.common.TypeBasedServiceFinder;
+import com.sap.sse.filestorage.FileStorageManagementService;
 import com.sap.sse.filestorage.FileStorageService;
 
 public class Activator implements BundleActivator {
 
     @Override
     public void start(BundleContext context) throws Exception {
-        context.registerService(FileStorageService.class, new AmazonS3FileStorageServiceImpl(), null);        
+        Dictionary<String, String> dict = new Hashtable<>();
+        dict.put(TypeBasedServiceFinder.TYPE, AmazonS3FileStorageServiceImpl.NAME);
+        context.registerService(FileStorageService.class, new AmazonS3FileStorageServiceImpl(), dict);
+
+        TransientFileStorageManagementServiceImpl mgmtService = new TransientFileStorageManagementServiceImpl();
+        context.registerService(FileStorageManagementService.class, mgmtService,
+                null);
+        mgmtService.setContext(context);
+        
+
+        //TODO load service properties from DB on startup
     }
 
     @Override

java/com.sap.sse.filestorage/src/com/sap/sse/filestorage/impl/AmazonS3FileStorageServiceImpl.java

@@ -35,6 +35,7 @@ import com.sap.sse.filestorage.Property;
  *
  */
 public class AmazonS3FileStorageServiceImpl implements FileStorageService {
+    public static final String NAME = "Amazon S3";
     private static final Logger logger = Logger.getLogger(AmazonS3FileStorageServiceImpl.class.getName());
 
     private static final String baseUrl = "s3.amazonaws.com";
@@ -144,7 +145,7 @@ public class AmazonS3FileStorageServiceImpl implements FileStorageService {
 
     @Override
     public String getName() {
-        return "Amazon S3";
+        return NAME;
     }
 
     @Override

java/com.sap.sse.filestorage/src/com/sap/sse/filestorage/impl/TransientFileStorageManagementServiceImpl.java

@@ -0,0 +1,48 @@
+package com.sap.sse.filestorage.impl;
+
+import org.osgi.framework.BundleContext;
+
+import com.sap.sse.common.NoCorrespondingServiceRegisteredException;
+import com.sap.sse.common.TypeBasedServiceFinder;
+import com.sap.sse.filestorage.FileStorageManagementService;
+import com.sap.sse.filestorage.FileStorageService;
+import com.sap.sse.filestorage.InvalidPropertiesException;
+import com.sap.sse.osgi.CachedOsgiTypeBasedServiceFinderFactory;
+
+public class TransientFileStorageManagementServiceImpl implements FileStorageManagementService {
+    private FileStorageService active;
+
+    private TypeBasedServiceFinder<FileStorageService> serviceFinder;
+
+    public void setContext(BundleContext context) {
+        serviceFinder = new CachedOsgiTypeBasedServiceFinderFactory(context)
+                .createServiceFinder(FileStorageService.class);
+    }
+
+    @Override
+    public FileStorageService getActiveFileStorageService() {
+        return active;
+    }
+
+    @Override
+    public void setActiveFileStorageService(FileStorageService service) throws InvalidPropertiesException {
+        active = service;
+    }
+
+    @Override
+    public FileStorageService[] getAvailableFileStorageServices() {
+        return serviceFinder.findAllServices().toArray(new FileStorageService[0]);
+    }
+
+    @Override
+    public FileStorageService getFileStorageService(String name) {
+        return serviceFinder.findService(name);
+    }
+
+    @Override
+    public void setFileStorageServiceProperty(String serviceName, String propertyName, String propertyValue)
+            throws NoCorrespondingServiceRegisteredException, IllegalArgumentException {
+        //TODO mgmt service that persists properties on master
+        serviceFinder.findService(serviceName).setProperty(propertyName, propertyValue);
+    }
+}

java/com.sap.sse.osgi/src/com/sap/sse/osgi/CachedOsgiTypeBasedServiceFinder.java

@@ -1,7 +1,9 @@
 package com.sap.sse.osgi;
 
 import java.util.HashMap;
+import java.util.HashSet;
 import java.util.Map;
+import java.util.Set;
 
 import org.osgi.framework.BundleContext;
 import org.osgi.framework.ServiceReference;
@@ -71,4 +73,9 @@ public class CachedOsgiTypeBasedServiceFinder<ServiceT> implements ServiceTracke
     public void setFallbackService(ServiceT fallback) {
         this.fallback = fallback;
     }
+
+    @Override
+    public Set<ServiceT> findAllServices() {
+        return new HashSet<ServiceT>(services.values());
+    }
 }