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annotate src/org/dancres/blitz/remote/ConstrainableLeaseImpl.java @ 35:6f68e94c1fb8 default tip

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Add CondensedStats monitoring utility, equivalent to vmstat
author Dominic Cleal <dominic-cleal@cdo2.com>
date Thu, 05 Aug 2010 11:07:25 +0100
parents 3dc0c5604566
children
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0
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1 package org.dancres.blitz.remote;
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2
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3 import java.io.IOException;
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4 import java.io.ObjectInputStream;
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5 import java.io.InvalidObjectException;
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6
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7 import java.lang.reflect.Method;
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8
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9 import net.jini.id.Uuid;
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10
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11 import net.jini.core.constraint.RemoteMethodControl;
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12 import net.jini.core.constraint.MethodConstraints;
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13
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14 import net.jini.security.proxytrust.ProxyTrustIterator;
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15 import net.jini.security.proxytrust.SingletonProxyTrustIterator;
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16
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17 import net.jini.core.lease.Lease;
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18
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19 import net.jini.admin.JoinAdmin;
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20
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21 import net.jini.id.Uuid;
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22
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23 import com.sun.jini.proxy.ConstrainableProxyUtil;
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24
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25 import org.dancres.blitz.lease.SpaceUID;
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26
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27 import org.dancres.util.ReflectUtil;
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28
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29 /**
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30 When running in "secure mode", Leases should be constrainable as per
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31 other proxies.
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32 */
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33 public final class ConstrainableLeaseImpl extends
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34 LeaseImpl implements RemoteMethodControl {
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35
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36 /**
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37 The outer-layer calls all omit SpaceUID whilst the server
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38 calls use SpaceUID so we must translate constraints which will be
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39 applied against the outer-layer methods to the internal methods.
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40 */
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41 private static final Method[] theMethodMapping = {
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42 ReflectUtil.findMethod(Lease.class, "renew",
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43 new Class[] {long.class}),
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44 ReflectUtil.findMethod(Landlord.class, "renew",
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45 new Class[] {SpaceUID.class, long.class}),
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46 ReflectUtil.findMethod(Lease.class, "cancel",
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47 new Class[] {}),
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48 ReflectUtil.findMethod(Landlord.class, "cancel",
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49 new Class[] {SpaceUID.class})
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50 };
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51
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52 private static Landlord constrainStub(Landlord aServer,
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53 MethodConstraints aConstraints) {
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54 RemoteMethodControl myServer = (RemoteMethodControl) aServer;
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55
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56 MethodConstraints myStubConstraints =
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57 ConstrainableProxyUtil.translateConstraints(aConstraints,
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58 theMethodMapping);
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59
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60 myServer.setConstraints(myStubConstraints);
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61 return (Landlord) myServer;
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62 }
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63
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64 private final MethodConstraints theConstraints;
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65
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66 ConstrainableLeaseImpl(Landlord aLandlord, Uuid aUuid, SpaceUID aUID,
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67 long aDuration) {
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68 super(aLandlord, aUuid, aUID, aDuration);
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69 theConstraints = null;
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70 }
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71
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72 ConstrainableLeaseImpl(Landlord aLandlord, Uuid aUuid, SpaceUID aUID,
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73 long aDuration, MethodConstraints aConstraints) {
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74 super(constrainStub(aLandlord, aConstraints), aUuid, aUID,
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75 aDuration);
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76 theConstraints = aConstraints;
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77 }
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78
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79 private ProxyTrustIterator getProxyTrustIterator() {
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80 return new SingletonProxyTrustIterator(theStub);
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81 }
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82
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83 public RemoteMethodControl setConstraints(MethodConstraints aConstraints) {
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84 return new ConstrainableLeaseImpl(theStub, theUuid, getUID(),
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85 expiration, aConstraints);
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86 }
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87
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88 public MethodConstraints getConstraints() {
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89 return theConstraints;
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90 }
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91 }