private void busyWait(final NameServer server, final int expected, final Set<Identifier> ids) {
int count = 0;
for (; ; ) {
final Iterable<NameAssignment> nas = server.lookup(ids);
for (@SuppressWarnings("unused") final NameAssignment na : nas) {
++count;
}
if (count == expected) {
break;
}
count = 0;
}
}
/**
* NameServer and NameClient test.
*
* @throws Exception
*/
@Test
public void testNameClient() throws Exception {
LOG.log(Level.FINEST, this.name.getMethodName());
final String localAddress = localAddressProvider.getLocalAddress();
final Injector injector = Tang.Factory.getTang().newInjector();
injector.bindVolatileParameter(
NameServerParameters.NameServerIdentifierFactory.class, this.factory);
injector.bindVolatileInstance(LocalAddressProvider.class, this.localAddressProvider);
try (final NameServer server = injector.getInstance(NameServer.class)) {
this.port = server.getPort();
final Map<Identifier, InetSocketAddress> idToAddrMap =
new HashMap<Identifier, InetSocketAddress>();
idToAddrMap.put(
this.factory.getNewInstance("task1"), new InetSocketAddress(localAddress, 7001));
idToAddrMap.put(
this.factory.getNewInstance("task2"), new InetSocketAddress(localAddress, 7002));
// registration
// invoke registration from the client side
Configuration nameResolverConf =
NameResolverConfiguration.CONF
.set(NameResolverConfiguration.NAME_SERVER_HOSTNAME, localAddress)
.set(NameResolverConfiguration.NAME_SERVICE_PORT, this.port)
.set(NameResolverConfiguration.CACHE_TIMEOUT, this.TTL)
.set(NameResolverConfiguration.RETRY_TIMEOUT, RETRY_TIMEOUT)
.set(NameResolverConfiguration.RETRY_COUNT, RETRY_COUNT)
.build();
try (final NameResolver client =
Tang.Factory.getTang().newInjector(nameResolverConf).getInstance(NameClient.class)) {
for (final Identifier id : idToAddrMap.keySet()) {
client.register(id, idToAddrMap.get(id));
}
// wait
final Set<Identifier> ids = idToAddrMap.keySet();
busyWait(server, ids.size(), ids);
// lookup
final Identifier id1 = this.factory.getNewInstance("task1");
final Identifier id2 = this.factory.getNewInstance("task2");
final Map<Identifier, InetSocketAddress> respMap =
new HashMap<Identifier, InetSocketAddress>();
InetSocketAddress addr1 = client.lookup(id1);
respMap.put(id1, addr1);
InetSocketAddress addr2 = client.lookup(id2);
respMap.put(id2, addr2);
for (final Identifier id : respMap.keySet()) {
LOG.log(Level.FINEST, "Mapping: {0} -> {1}", new Object[] {id, respMap.get(id)});
}
Assert.assertTrue(isEqual(idToAddrMap, respMap));
// un-registration
for (final Identifier id : idToAddrMap.keySet()) {
client.unregister(id);
}
// wait
busyWait(server, 0, ids);
final Map<Identifier, InetSocketAddress> serverMap =
new HashMap<Identifier, InetSocketAddress>();
addr1 = server.lookup(id1);
if (addr1 != null) {
serverMap.put(id1, addr1);
}
addr2 = server.lookup(id1);
if (addr2 != null) {
serverMap.put(id2, addr2);
}
Assert.assertEquals(0, serverMap.size());
}
}
}
/**
* NameServer and NameRegistryClient test.
*
* @throws Exception
*/
@Test
public void testNamingRegistry() throws Exception {
LOG.log(Level.FINEST, this.name.getMethodName());
final Injector injector = Tang.Factory.getTang().newInjector();
injector.bindVolatileParameter(
NameServerParameters.NameServerIdentifierFactory.class, this.factory);
injector.bindVolatileInstance(LocalAddressProvider.class, this.localAddressProvider);
try (final NameServer server = injector.getInstance(NameServer.class)) {
this.port = server.getPort();
final String localAddress = localAddressProvider.getLocalAddress();
// names to start with
final Map<Identifier, InetSocketAddress> idToAddrMap =
new HashMap<Identifier, InetSocketAddress>();
idToAddrMap.put(
this.factory.getNewInstance("task1"), new InetSocketAddress(localAddress, 7001));
idToAddrMap.put(
this.factory.getNewInstance("task2"), new InetSocketAddress(localAddress, 7002));
// registration
// invoke registration from the client side
try (final NameRegistryClient client =
new NameRegistryClient(
localAddress, this.port, this.factory, this.localAddressProvider)) {
for (final Identifier id : idToAddrMap.keySet()) {
client.register(id, idToAddrMap.get(id));
}
// wait
final Set<Identifier> ids = idToAddrMap.keySet();
busyWait(server, ids.size(), ids);
// check the server side
Map<Identifier, InetSocketAddress> serverMap = new HashMap<Identifier, InetSocketAddress>();
Iterable<NameAssignment> nas = server.lookup(ids);
for (final NameAssignment na : nas) {
LOG.log(
Level.FINEST,
"Mapping: {0} -> {1}",
new Object[] {na.getIdentifier(), na.getAddress()});
serverMap.put(na.getIdentifier(), na.getAddress());
}
Assert.assertTrue(isEqual(idToAddrMap, serverMap));
// un-registration
for (final Identifier id : idToAddrMap.keySet()) {
client.unregister(id);
}
// wait
busyWait(server, 0, ids);
serverMap = new HashMap<Identifier, InetSocketAddress>();
nas = server.lookup(ids);
for (final NameAssignment na : nas) {
serverMap.put(na.getIdentifier(), na.getAddress());
}
Assert.assertEquals(0, serverMap.size());
}
}
}
