| 1 | // Copyright 2004-2007 Jean-Francois Poilpret |
| 2 | // |
| 3 | // Licensed under the Apache License, Version 2.0 (the "License"); |
| 4 | // you may not use this file except in compliance with the License. |
| 5 | // You may obtain a copy of the License at |
| 6 | // |
| 7 | // http://www.apache.org/licenses/LICENSE-2.0 |
| 8 | // |
| 9 | // Unless required by applicable law or agreed to in writing, software |
| 10 | // distributed under the License is distributed on an "AS IS" BASIS, |
| 11 | // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| 12 | // See the License for the specific language governing permissions and |
| 13 | // limitations under the License. |
| 14 | |
| 15 | package net.sourceforge.hivelock; |
| 16 | |
| 17 | import java.lang.reflect.InvocationHandler; |
| 18 | import java.lang.reflect.InvocationTargetException; |
| 19 | import java.lang.reflect.Method; |
| 20 | import java.lang.reflect.Proxy; |
| 21 | import java.security.Principal; |
| 22 | import java.util.HashMap; |
| 23 | import java.util.Map; |
| 24 | |
| 25 | import org.apache.hivemind.ApplicationRuntimeException; |
| 26 | import org.apache.hivemind.Discardable; |
| 27 | import org.apache.hivemind.impl.ConstructableServicePoint; |
| 28 | import org.apache.hivemind.impl.servicemodel.AbstractServiceModelImpl; |
| 29 | import org.apache.hivemind.internal.Module; |
| 30 | import org.apache.hivemind.util.ToStringBuilder; |
| 31 | |
| 32 | public class UserServiceModel |
| 33 | extends AbstractServiceModelImpl |
| 34 | implements UserEventListener |
| 35 | { |
| 36 | public UserServiceModel(ConstructableServicePoint servicePoint) |
| 37 | { |
| 38 | super(servicePoint); |
| 39 | Module module = servicePoint.getModule(); |
| 40 | _loader = module.getClassResolver().getClassLoader(); |
| 41 | _security = (SecurityService) module.getService( |
| 42 | "hivelock.core.SecurityService", SecurityService.class); |
| 43 | _security.addUserEventListener(this); |
| 44 | } |
| 45 | |
| 46 | public synchronized Object getService() |
| 47 | { |
| 48 | if (_proxy == null) |
| 49 | { |
| 50 | _proxy = createUserProxy(); |
| 51 | } |
| 52 | return _proxy; |
| 53 | } |
| 54 | |
| 55 | //CSOFF: IllegalCatchCheck |
| 56 | protected Object createUserProxy() |
| 57 | { |
| 58 | try |
| 59 | { |
| 60 | Object proxy = Proxy.newProxyInstance( |
| 61 | _loader, |
| 62 | new Class[] {getServicePoint().getServiceInterface()}, |
| 63 | new UserServiceProxy()); |
| 64 | return addInterceptors(proxy); |
| 65 | } |
| 66 | catch (Exception ex) |
| 67 | { |
| 68 | throw new ApplicationRuntimeException(ex); |
| 69 | } |
| 70 | } |
| 71 | //CSON: IllegalCatchCheck |
| 72 | |
| 73 | public void instantiateService() |
| 74 | { |
| 75 | // Just create the proxy |
| 76 | getService(); |
| 77 | // Do nothing else |
| 78 | } |
| 79 | |
| 80 | protected synchronized Object getServiceForUser() |
| 81 | { |
| 82 | Principal user = _security.getCurrentUser(); |
| 83 | Object service = _implementations.get(user); |
| 84 | if (service == null) |
| 85 | { |
| 86 | // Instantiate service |
| 87 | service = constructCoreServiceImplementation(); |
| 88 | _implementations.put(user, service); |
| 89 | } |
| 90 | return service; |
| 91 | } |
| 92 | |
| 93 | // Proxy for any service in "user" model |
| 94 | protected class UserServiceProxy implements InvocationHandler |
| 95 | { |
| 96 | //CSOFF: IllegalThrowsCheck |
| 97 | public Object invoke(Object proxy, Method method, Object[] args) |
| 98 | throws Throwable |
| 99 | { |
| 100 | if ("toString".equals(method.getName())) |
| 101 | { |
| 102 | ToStringBuilder builder = new ToStringBuilder(this); |
| 103 | builder.append("serviceId", getServicePoint().getExtensionPointId()); |
| 104 | return builder.toString(); |
| 105 | } |
| 106 | |
| 107 | Object service = getServiceForUser(); |
| 108 | |
| 109 | try |
| 110 | { |
| 111 | return method.invoke(service, args); |
| 112 | } |
| 113 | catch (InvocationTargetException e) |
| 114 | { |
| 115 | throw e.getTargetException(); |
| 116 | } |
| 117 | } |
| 118 | //CSON: IllegalThrowsCheck |
| 119 | } |
| 120 | |
| 121 | public void userConnected(Principal user) |
| 122 | { |
| 123 | } |
| 124 | |
| 125 | synchronized public void userDisconnected(Principal user, boolean forced) |
| 126 | { |
| 127 | Object service = _implementations.remove(user); |
| 128 | if (service != null && service instanceof Discardable) |
| 129 | { |
| 130 | ((Discardable) service).threadDidDiscardService(); |
| 131 | } |
| 132 | } |
| 133 | |
| 134 | final protected ClassLoader _loader; |
| 135 | final protected SecurityService _security; |
| 136 | final protected Map<Principal, Object> _implementations = new HashMap<Principal, Object>(); |
| 137 | protected Object _proxy; |
| 138 | } |