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Diffstat (limited to 'tags/java/sca/2.0-M4-RC3/modules/node-impl-osgi/src/main/java/org/apache/tuscany/sca/osgi/remoteserviceadmin/RemoteServiceAdmin.java')
| -rw-r--r-- | tags/java/sca/2.0-M4-RC3/modules/node-impl-osgi/src/main/java/org/apache/tuscany/sca/osgi/remoteserviceadmin/RemoteServiceAdmin.java | 125 |
1 files changed, 125 insertions, 0 deletions
diff --git a/tags/java/sca/2.0-M4-RC3/modules/node-impl-osgi/src/main/java/org/apache/tuscany/sca/osgi/remoteserviceadmin/RemoteServiceAdmin.java b/tags/java/sca/2.0-M4-RC3/modules/node-impl-osgi/src/main/java/org/apache/tuscany/sca/osgi/remoteserviceadmin/RemoteServiceAdmin.java new file mode 100644 index 0000000000..dade67c096 --- /dev/null +++ b/tags/java/sca/2.0-M4-RC3/modules/node-impl-osgi/src/main/java/org/apache/tuscany/sca/osgi/remoteserviceadmin/RemoteServiceAdmin.java @@ -0,0 +1,125 @@ +/* + * Copyright (c) OSGi Alliance (2008, 2009). All Rights Reserved. + * + * Licensed under the Apache License, Version 2.0 (the "License"); + * you may not use this file except in compliance with the License. + * You may obtain a copy of the License at + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, software + * distributed under the License is distributed on an "AS IS" BASIS, + * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + * See the License for the specific language governing permissions and + * limitations under the License. + */ +package org.apache.tuscany.sca.osgi.remoteserviceadmin; + +import java.util.Collection; +import java.util.List; +import java.util.Map; + +import org.osgi.framework.ServiceReference; + +/** + * A Remote Service Admin manages the import and export of services. + * + * A Distribution Provider can expose a control interface. This interface allows + * the a remote manager to control the export and import of services. + * + * The API allows a remote manager to export a service, to import a service, and + * find out about the current imports and exports. + * + * + * + * @ThreadSafe + */ +public interface RemoteServiceAdmin { + + /** + * Export a service to a given endpoint. The Remote Service Admin must + * create an endpoint from the given description that can be used by other + * Distrbution Providers to connect to this Remote Service Admin and use the + * exported service. This method can return null if the service could not be + * exported because the endpoint could not be implemented by this Remote + * Service Admin. + * + * The properties on a Service Reference are case insensitive while the + * properties on a <code>properties</code> are case sensitive. A value in + * the <code>properties</code> must therefore override any case variant in + * the properties of the Service Reference. + * + * If an endpoint can not be created because no + * {@link EndpointPermission#EXPORT} can be obtained to export this service, + * then this endpoint must be ignored and no Export Registration must be + * included in the returned list. + * + * @param ref The Service Reference to export + * @param properties The properties to create a local endpoint that can be + * implemented by this Remote Service Admin. If this is null, the + * endpoint will be determined by the properties on the service. The + * properties are the same as given for an exported service. They are + * overlaid over any properties the service defines (case + * insensitive). This parameter can be <code>null</code>, this + * should be treated as an empty map. + * @return An Export Registration that combines the Endpoint Description and + * the Service Reference or <code>null</code> if the service could + * not be exported + * @throws IllegalArgumentException + * @throws UnsupportedOperationException + * + * TODO discuss case difference in properties + * + * TODO More exceptions? + * TODO Can you export ANY service by providing the proper properties? + */ + List/* <ExportRegistration> */exportService(ServiceReference ref, Map/* <String,Object> */properties) + throws IllegalArgumentException, UnsupportedOperationException; + + /** + * Import a service from an endpoint. The Remote Service Admin must use the + * given endpoint to create a proxy. This method can return null if the + * service could not be imported. + * + * TODO if the import reg. is valid (getException==null), can we then assume the + * service is registered? + * + * If an endpoint can not be imported because no + * {@link EndpointPermission#IMPORT} can be obtained, then this endpoint + * must be ignored and no Import Registration must included in the returned + * list. + * + * @param endpoint The Endpoint Description to be used for import + * @return An Import Registration that combines the Endpoint Description and + * the Service Reference or <code>null</code> if the endpoint + * could not be imported + */ + ImportRegistration importService(EndpointDescription endpoint); + + /** + * Answer the currently active Export Registrations. + * + * @return A collection of Export Registrations that are currently active. + * @throws SecurityException When the caller no + * {@link EndpointPermission#READ} could be obtained + * + * TODO I guess we must ensure these registrations cannot be closed? Only the owners should be able to close them, + * TODO should we make sure that the list contains the registration objects that the caller created? + */ + Collection/* <ExportRegistration> */getExportedServices(); + + /** + * Answer the currently active Import Registrations. + * + * @throws SecurityException When the caller no EndpointPermission LIST + * could be obtained + * @return A collection of Import Registrations that are currently active. + * @throws SecurityException When the caller no + * {@link EndpointPermission#READ} could be obtained + * + * TODO I guess we must ensure these registrations cannot be closed? Only the owners should be able to close them, + * TODO should we make sure that the list contains the registration objects that the caller created? + */ + Collection/* <ImportRegistration> */getImportedEndpoints(); + +} |