| 1 | package de.uka.ipd.sdq.prototype.framework.utils; |
| 2 | |
| 3 | import java.io.Serializable; |
| 4 | import java.net.MalformedURLException; |
| 5 | import java.rmi.AlreadyBoundException; |
| 6 | import java.rmi.Naming; |
| 7 | import java.rmi.NotBoundException; |
| 8 | import java.rmi.Remote; |
| 9 | import java.rmi.RemoteException; |
| 10 | import java.rmi.registry.LocateRegistry; |
| 11 | import java.rmi.registry.Registry; |
| 12 | import java.rmi.server.UnicastRemoteObject; |
| 13 | import java.util.Scanner; |
| 14 | |
| 15 | import de.uka.ipd.sdq.prototype.framework.AbstractScenarioThread; |
| 16 | |
| 17 | public class RmiRegistry extends UnicastRemoteObject implements IRmiRegistry, Serializable { |
| 18 | |
| 19 | /** |
| 20 | * |
| 21 | */ |
| 22 | private static final long serialVersionUID = 1L; |
| 23 | |
| 24 | public static final String LOCALHOST = "localhost"; |
| 25 | |
| 26 | private static RmiRegistry singleton; |
| 27 | |
| 28 | protected static org.apache.log4j.Logger logger = org.apache.log4j.Logger |
| 29 | .getLogger(AbstractScenarioThread.class); |
| 30 | |
| 31 | private RmiRegistry() throws RemoteException |
| 32 | { |
| 33 | // Locate java RMI registry or create one |
| 34 | try { |
| 35 | LocateRegistry.createRegistry(Registry.REGISTRY_PORT); |
| 36 | logger.info("Java RMI registry started"); |
| 37 | |
| 38 | } catch (RemoteException e) { |
| 39 | LocateRegistry.getRegistry(Registry.REGISTRY_PORT); |
| 40 | logger.info("Java RMI registry already running"); |
| 41 | } |
| 42 | |
| 43 | // Create registry binding service if it doesn't exist yet |
| 44 | try { |
| 45 | Naming.lookup("//localhost/" + PCM_RMI_REGISTRY); |
| 46 | |
| 47 | logger.info("RMI binding service already running"); |
| 48 | System.exit(0); |
| 49 | |
| 50 | } catch (MalformedURLException e) { |
| 51 | } catch (NotBoundException e) { |
| 52 | logger.info("Starting RMI binding service"); |
| 53 | |
| 54 | try { |
| 55 | Naming.bind(PCM_RMI_REGISTRY, this); |
| 56 | } catch (MalformedURLException e2) { |
| 57 | logger.error("RMI registry failed", e2); |
| 58 | } catch (RemoteException e2) { |
| 59 | logger.error("RMI registry failed", e2); |
| 60 | } catch (AlreadyBoundException e2) { |
| 61 | logger.error("RMI registry failed: Registry already bound on this port", e2); |
| 62 | } |
| 63 | } |
| 64 | } |
| 65 | |
| 66 | /* (non-Javadoc) |
| 67 | * @see de.uka.ipd.sdq.prototype.framework.IRmiRegistry#bindComponent(java.lang.String, java.rmi.server.UnicastRemoteObject) |
| 68 | */ |
| 69 | public void bindComponent(String name, Remote component) throws RemoteException |
| 70 | { |
| 71 | logger.info("Binding " + name + " to RMI registry."); |
| 72 | try { |
| 73 | java.rmi.Naming.rebind(name, component); |
| 74 | } catch (MalformedURLException e) { |
| 75 | logger.error("RMI registry failed", e); |
| 76 | // } catch (AlreadyBoundException e) { |
| 77 | // logger.error("RMI Registry failed: Component " + name + " already bound",e); |
| 78 | } |
| 79 | } |
| 80 | |
| 81 | public static void startRegistry() |
| 82 | { |
| 83 | if (singleton == null) { |
| 84 | try { |
| 85 | singleton = new RmiRegistry(); |
| 86 | } catch (RemoteException e) { |
| 87 | logger.error("RMI Registry failed", e); |
| 88 | } |
| 89 | } |
| 90 | } |
| 91 | |
| 92 | /** |
| 93 | * Registers a component to a RMI registry at the given IP. |
| 94 | * @param registryIP IP of the registry |
| 95 | * @param component instance of the component |
| 96 | * @param componentName unique name of the component |
| 97 | */ |
| 98 | public static void registerComponent(String registryIP, java.rmi.Remote component, String componentName) { |
| 99 | |
| 100 | try { |
| 101 | Registry reg = LocateRegistry.getRegistry(registryIP); |
| 102 | |
| 103 | de.uka.ipd.sdq.prototype.framework.utils.IRmiRegistry pcmRegistry = null; |
| 104 | |
| 105 | while (true) { |
| 106 | try { |
| 107 | pcmRegistry = (IRmiRegistry) reg.lookup(PCM_RMI_REGISTRY); |
| 108 | pcmRegistry.bindComponent(componentName, component); |
| 109 | break; |
| 110 | } catch (RemoteException e) { |
| 111 | logger.info("RMI registry not found. Next attempt in 3 seconds."); |
| 112 | Thread.sleep(3000); |
| 113 | } catch (NotBoundException e) { |
| 114 | logger.info("RMI binding service not found. Next attempt in 3 seconds."); |
| 115 | Thread.sleep(3000); |
| 116 | } |
| 117 | } |
| 118 | |
| 119 | logger.info(componentName + " bound in registry"); |
| 120 | |
| 121 | } catch (Exception e) { |
| 122 | logger.error(componentName + " err: " + e.getMessage()); |
| 123 | } |
| 124 | |
| 125 | } |
| 126 | |
| 127 | /** |
| 128 | * Returns an IP from an argument string array or LOCALHOST instead |
| 129 | * @param args |
| 130 | * @return |
| 131 | */ |
| 132 | public static String getIpFromArguments(String[] args) { |
| 133 | if (args != null && args.length > 0) { |
| 134 | return args[0]; |
| 135 | } |
| 136 | return LOCALHOST; |
| 137 | } |
| 138 | |
| 139 | /** |
| 140 | * |
| 141 | * @param name |
| 142 | * @return |
| 143 | */ |
| 144 | public static Remote lookup(String name) { |
| 145 | Remote result = null; |
| 146 | |
| 147 | while (true) { |
| 148 | try { |
| 149 | |
| 150 | result = java.rmi.Naming.lookup(name); |
| 151 | |
| 152 | } catch (java.net.MalformedURLException e) { |
| 153 | logger.error("Remote URI malformed. This should never happen, strange model names used?"); |
| 154 | } catch (java.rmi.RemoteException e) { |
| 155 | logger.error("Error while waiting for system. " + e); |
| 156 | } catch (java.rmi.NotBoundException e) { |
| 157 | logger.info("System missing: " + e.getMessage()); |
| 158 | try { |
| 159 | Thread.sleep(3000); |
| 160 | } catch (InterruptedException innerE) { |
| 161 | logger.error("Error while waiting for system. " + e); |
| 162 | } |
| 163 | continue; |
| 164 | } |
| 165 | |
| 166 | return result; |
| 167 | } |
| 168 | } |
| 169 | |
| 170 | |
| 171 | public static void main(String[] args) |
| 172 | { |
| 173 | startRegistry(); |
| 174 | |
| 175 | logger.info("RMI registry started on port " + Registry.REGISTRY_PORT); |
| 176 | |
| 177 | new Thread() { |
| 178 | public void run() { |
| 179 | Scanner input = new Scanner(System.in); |
| 180 | if (input.hasNext()) { |
| 181 | input.nextLine(); |
| 182 | } |
| 183 | } |
| 184 | }.run(); |
| 185 | } |
| 186 | } |