diff options
Diffstat (limited to 'sca-java-2.x/branches/sca-equinox/samples/osgi-supplychain/src/main/java/supplychain/OSGiBundleImpl.java')
-rw-r--r-- | sca-java-2.x/branches/sca-equinox/samples/osgi-supplychain/src/main/java/supplychain/OSGiBundleImpl.java | 121 |
1 files changed, 121 insertions, 0 deletions
diff --git a/sca-java-2.x/branches/sca-equinox/samples/osgi-supplychain/src/main/java/supplychain/OSGiBundleImpl.java b/sca-java-2.x/branches/sca-equinox/samples/osgi-supplychain/src/main/java/supplychain/OSGiBundleImpl.java new file mode 100644 index 0000000000..5f40054ada --- /dev/null +++ b/sca-java-2.x/branches/sca-equinox/samples/osgi-supplychain/src/main/java/supplychain/OSGiBundleImpl.java @@ -0,0 +1,121 @@ +/* + * Licensed to the Apache Software Foundation (ASF) under one + * or more contributor license agreements. See the NOTICE file + * distributed with this work for additional information + * regarding copyright ownership. The ASF licenses this file + * to you 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 supplychain; + + +import java.lang.reflect.Field; +import java.util.Hashtable; + +import org.osgi.framework.BundleActivator; +import org.osgi.framework.BundleContext; +import org.osgi.framework.ServiceEvent; +import org.osgi.framework.ServiceListener; +import org.osgi.framework.ServiceReference; + + +/** + * Common code for all OSGi bundles which dont use declarative services. + * Registers services and sets references. + */ +public class OSGiBundleImpl implements ServiceListener, BundleActivator { + + + String name; + String serviceName; + String[] references; + Class<?>[] referenceClasses; + Field[] referenceFields; + + Class myClass; + + private BundleContext bundleContext; + + public OSGiBundleImpl(String serviceName, String... references) { + + myClass = this.getClass(); + this.name = this.getClass().getSimpleName(); + this.serviceName = serviceName; + this.references = references; + + try { + referenceClasses = new Class[references.length]; + referenceFields = new Field[references.length]; + for (int i = 0; i < references.length; i++) { + referenceFields[i] = this.getClass().getDeclaredField(references[i]); + referenceFields[i].setAccessible(true); + referenceClasses[i] = referenceFields[i].getType(); + } + + } catch (Exception e) { + throw new RuntimeException(e); + } + + } + + public void start(BundleContext bc) { + + System.out.println("Started OSGi bundle with activator " + name); + + this.bundleContext = bc; + + bundleContext.registerService(serviceName, this, new Hashtable()); + + for (int i = 0; i < references.length; i++) { + + try { + + ServiceReference ref = bundleContext.getServiceReference(referenceClasses[i].getName()); + if (ref != null) { + Object obj = bundleContext.getService(ref); + referenceFields[i].set(this, referenceClasses[i].cast(obj)); + } else { + String filter = "(objectclass=" + referenceClasses[i].getName() + ")"; + this.bundleContext.addServiceListener(this, filter); + } + } catch (Exception e) { + e.printStackTrace(); + } + } + } + + public void stop(BundleContext bc) { + System.out.println("Stop OSGi bundle with activator " + name); + + } + + + public void serviceChanged(ServiceEvent event) { + try { + if (event.getType() == ServiceEvent.REGISTERED) { + + ServiceReference ref = event.getServiceReference(); + Object obj = bundleContext.getService(ref); + for (int i = 0; i < references.length; i++) { + if (referenceClasses[i].isAssignableFrom(obj.getClass())) { + referenceFields[i].set(this, referenceClasses[i].cast(obj)); + } + } + } + } catch (Throwable e) { + e.printStackTrace(); + } + } + + +} |