sli/provider/src/main/java/org/onap/ccsdk/sli/core/sli/provider/SvcLogicAdaptorFactory.java

   1 /*-
   2  * ============LICENSE_START=======================================================
   3  * ONAP : CCSDK
   4  * ================================================================================
   5  * Copyright (C) 2017 ONAP
   6  * ================================================================================
   7  * Licensed under the Apache License, Version 2.0 (the "License");
   8  * you may not use this file except in compliance with the License.
   9  * You may obtain a copy of the License at
  10  *
  11  *      http://www.apache.org/licenses/LICENSE-2.0
  12  *
  13  * Unless required by applicable law or agreed to in writing, software
  14  * distributed under the License is distributed on an "AS IS" BASIS,
  15  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  16  * See the License for the specific language governing permissions and
  17  * limitations under the License.
  18  * ============LICENSE_END=========================================================
  19  */
  20
  21 package org.onap.ccsdk.sli.core.sli.provider;
  22
  23 import java.util.HashMap;
  24
  25 import org.onap.ccsdk.sli.core.sli.SvcLogicAdaptor;
  26 import org.osgi.framework.BundleContext;
  27 import org.osgi.framework.FrameworkUtil;
  28 import org.osgi.framework.ServiceReference;
  29 import org.slf4j.Logger;
  30 import org.slf4j.LoggerFactory;
  31
  32 public class SvcLogicAdaptorFactory {
  33
  34         private static final Logger LOG = LoggerFactory
  35                         .getLogger(SvcLogicAdaptorFactory.class);
  36
  37         private static HashMap<String, SvcLogicAdaptor> adaptorMap = new HashMap<String, SvcLogicAdaptor>();
  38
  39         public static void registerAdaptor(SvcLogicAdaptor adaptor) {
  40                 String name = adaptor.getClass().getName();
  41                 LOG.info("Registering adaptor " + name);
  42                 adaptorMap.put(name, adaptor);
  43
  44         }
  45
  46         public static void unregisterAdaptor(String name) {
  47                 if (adaptorMap.containsKey(name)) {
  48                         LOG.info("Unregistering " + name);
  49                         adaptorMap.remove(name);
  50                 }
  51         }
  52
  53         public static SvcLogicAdaptor getInstance(String name) {
  54                 if (adaptorMap.containsKey(name)) {
  55                         return (adaptorMap.get(name));
  56                 } else {
  57                         BundleContext bctx = null;
  58                         try
  59                         {
  60                          bctx = FrameworkUtil.getBundle(SvcLogicAdaptorFactory.class)
  61                                         .getBundleContext();
  62                         }
  63                         catch (Exception e)
  64                         {
  65                                 LOG.debug("Caught exception trying to locate device adaptor "+name, e);
  66                                 return(null);
  67                         }
  68
  69                         ServiceReference sref = bctx.getServiceReference(name);
  70
  71                         if (sref != null) {
  72                                 SvcLogicAdaptor adaptor = (SvcLogicAdaptor) bctx
  73                                                 .getService(sref);
  74
  75                                 if (adaptor != null) {
  76                                         registerAdaptor(adaptor);
  77
  78                                         return (adaptor);
  79                                 }
  80                                 return (null);
  81                         }
  82                 }
  83                 return(null);
  84         }
  85 }