[52] | 1 | package geniusweb.simplerunner;
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| 2 |
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| 3 | import java.io.IOException;
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| 4 | import java.lang.reflect.Constructor;
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| 5 | import java.lang.reflect.InvocationTargetException;
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| 6 | import java.net.URI;
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| 7 | import java.net.URISyntaxException;
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| 8 | import java.util.LinkedList;
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| 9 | import java.util.List;
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| 10 |
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| 11 | import geniusweb.actions.Action;
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| 12 | import geniusweb.actions.PartyId;
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| 13 | import geniusweb.inform.Inform;
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| 14 | import geniusweb.party.Party;
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| 15 | import geniusweb.protocol.partyconnection.ProtocolToPartyConn;
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| 16 | import geniusweb.protocol.partyconnection.ProtocolToPartyConnFactory;
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| 17 | import geniusweb.references.Reference;
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| 18 | import tudelft.utilities.repository.NoResourcesNowException;
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| 19 |
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| 20 | /**
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| 21 | * A connectionfactory that only accepts URLs of the form
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| 22 | * <code>classpath:org/my/package/class</code>
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| 23 | *
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| 24 | */
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| 25 | public class ClassPathConnectionFactory implements ProtocolToPartyConnFactory {
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| 26 | private List<ConnectionPair> allConnections = new LinkedList<>();
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| 27 |
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| 28 | /**
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| 29 | * @param reference the party class path reference4
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| 30 | */
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| 31 | @Override
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| 32 | public ProtocolToPartyConn connect(Reference reference) {
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| 33 | ConnectionPair connpair = new ConnectionPair(reference);
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| 34 | allConnections.add(connpair);
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| 35 | return connpair.getProtocolToPartyConn();
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| 36 | }
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| 37 |
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| 38 | @Override
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| 39 | public List<ProtocolToPartyConn> connect(List<Reference> references)
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| 40 | throws IOException, NoResourcesNowException {
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| 41 | List<ProtocolToPartyConn> connections = new LinkedList<>();
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| 42 | for (Reference partyref : references) {
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| 43 | connections.add(connect(partyref));
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| 44 | }
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| 45 | return connections;
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| 46 | }
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| 47 |
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| 48 | /**
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| 49 | * @return list of connections that are still open.
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| 50 | */
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| 51 | public List<BasicConnection> getOpenConnections() {
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| 52 | List<BasicConnection> open = new LinkedList<>();
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| 53 | for (ConnectionPair connpair : allConnections) {
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| 54 | open.addAll(connpair.getOpenConnections());
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| 55 | }
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| 56 | return open;
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| 57 | }
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| 58 |
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| 59 | }
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| 60 |
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| 61 | class BasicConnectionWithParty extends BasicConnection<Action, Inform>
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| 62 | implements ProtocolToPartyConn {
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| 63 |
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| 64 | private PartyId id;
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| 65 |
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| 66 | public BasicConnectionWithParty(Reference reference, URI uri) {
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| 67 | super(reference, uri);
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| 68 | this.id = new PartyId(uri.toString().replace("classpath:", "")
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| 69 | .replaceAll("\\.", "_"));
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| 70 | }
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| 71 |
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| 72 | @Override
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| 73 | public PartyId getParty() {
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| 74 | return id;
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| 75 | }
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| 76 |
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| 77 | @Override
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| 78 | public String toString() {
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| 79 | return "WP" + super.toString();
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| 80 | }
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| 81 |
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| 82 | }
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| 83 |
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| 84 | /**
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| 85 | * Contains the connection from protocol to party and from party to protocol.
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| 86 | * These two are dependent on each other, and must close together.
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| 87 | *
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| 88 | */
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| 89 | class ConnectionPair {
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| 90 | private static int serialcounter = 1;
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| 91 | private static final String SCHEME = "classpath";
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| 92 | private final static URI PROTOCOLURI = uri("protocol:protocol");
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| 93 |
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| 94 | private final BasicConnection<Inform, Action> party2protocol;
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| 95 | private final BasicConnectionWithParty protocol2party;
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| 96 |
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| 97 | /**
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| 98 | *
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| 99 | * @param reference the party class path reference4
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| 100 | *
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| 101 | */
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| 102 | public ConnectionPair(Reference reference) {
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| 103 | // set up the whole other party including the connection to it.
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| 104 | String classpath = getClassPath(reference.getURI());
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| 105 | Party party = instantiate(classpath);
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| 106 |
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| 107 | // if call to protocol would fail, we should also close the
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| 108 | // protocol2party connection. But we assume that will work fine.
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| 109 | party2protocol = new BasicConnection<Inform, Action>(reference,
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| 110 | PROTOCOLURI) {
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| 111 |
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| 112 | @Override
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| 113 | public void close() {
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| 114 | if (isOpen()) {
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| 115 | super.close();
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| 116 | protocol2party.close();
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| 117 | }
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| 118 | }
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| 119 |
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| 120 | };
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| 121 |
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| 122 | // if callback from protocol to party fails, then also close the
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| 123 | // other direction.
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| 124 | protocol2party = new BasicConnectionWithParty(reference,
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| 125 | uri("classpath:" + reference.getURI().getSchemeSpecificPart()
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| 126 | + "." + (serialcounter++))) {
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| 127 | @Override
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| 128 | public void close() {
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| 129 | if (isOpen()) {
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| 130 | super.close();
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| 131 | party2protocol.close();
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| 132 | }
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| 133 | }
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| 134 |
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| 135 | };
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| 136 |
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| 137 | party2protocol.init(action -> protocol2party.notifyListeners(action));
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| 138 |
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| 139 | protocol2party.init(info -> party2protocol.notifyListeners(info));
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| 140 |
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| 141 | party.connect(party2protocol);
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| 142 |
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| 143 | }
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| 144 |
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| 145 | /**
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| 146 | *
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| 147 | * @return the open connections
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| 148 | */
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| 149 | public List<BasicConnection> getOpenConnections() {
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| 150 | List<BasicConnection> open = new LinkedList<>();
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| 151 | if (party2protocol.isOpen())
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| 152 | open.add(party2protocol);
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| 153 | if (protocol2party.isOpen())
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| 154 | open.add(protocol2party);
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| 155 | return open;
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| 156 | }
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| 157 |
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| 158 | public BasicConnectionWithParty getProtocolToPartyConn() {
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| 159 | return protocol2party;
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| 160 | }
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| 161 |
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| 162 | /**
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| 163 | * Internal use for testing
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| 164 | */
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| 165 | protected BasicConnection getPartyToProtocolConn() {
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| 166 | return party2protocol;
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| 167 | }
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| 168 |
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| 169 | /**
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| 170 | *
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| 171 | * @param classpath
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| 172 | * @return instance of the given {@link Party} on the classpath
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| 173 | * @throws IllegalArgumentException if the Party can not be instantiated, eg
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| 174 | * because of a ClassCastException,
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| 175 | * ClassNotFoundException,
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| 176 | * IllegalAccessException etc. Such an
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| 177 | * exception is considered a bug by the
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| 178 | * programmer, because this is a
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| 179 | * stand-alone runner.
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| 180 | */
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| 181 | @SuppressWarnings("unchecked")
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| 182 | private Party instantiate(String classpath) {
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| 183 | System.out.println("Connecting with party '" + classpath + "'");
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| 184 | Class<Party> partyclass;
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| 185 | try {
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| 186 | partyclass = (Class<Party>) Class.forName(classpath);
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| 187 | Constructor<Party> ctor = partyclass.getConstructor();
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| 188 | return ctor.newInstance(new Object[] {});
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| 189 | } catch (ClassNotFoundException | NoSuchMethodException
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| 190 | | SecurityException | InstantiationException
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| 191 | | IllegalAccessException | IllegalArgumentException
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| 192 | | InvocationTargetException e) {
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| 193 | throw new IllegalArgumentException(
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| 194 | "Failed to create connection to party " + classpath, e);
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| 195 | }
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| 196 |
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| 197 | }
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| 198 |
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| 199 | private static URI uri(String ref) {
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| 200 | try {
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| 201 | return new URI(ref);
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| 202 | } catch (URISyntaxException e) {
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| 203 | throw new IllegalStateException("failed to create basic URI", e);
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| 204 | }
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| 205 | }
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| 206 |
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| 207 | private String getClassPath(URI uri) {
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| 208 | if (!SCHEME.equals(uri.getScheme())) {
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| 209 | throw new IllegalArgumentException("Required the " + SCHEME
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| 210 | + " protocol but found " + uri.getScheme());
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| 211 | }
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| 212 | String path = uri.getSchemeSpecificPart();
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| 213 | if (path == null) {
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| 214 | throw new IllegalArgumentException(
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| 215 | "Expected classpath but found null in " + uri);
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| 216 | }
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| 217 | return path;
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| 218 | }
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| 219 |
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| 220 | } |
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