/**
* Construct a client-side proxy object that implements the named protocol, talking to a server at
* the named address.
*
* @param <T>
*/
@Override
@SuppressWarnings("unchecked")
public <T> ProtocolProxy<T> getProxy(
Class<T> protocol,
long clientVersion,
InetSocketAddress addr,
UserGroupInformation ticket,
Configuration conf,
SocketFactory factory,
int rpcTimeout,
RetryPolicy connectionRetryPolicy)
throws IOException {
if (connectionRetryPolicy != null) {
throw new UnsupportedOperationException(
"Not supported: connectionRetryPolicy=" + connectionRetryPolicy);
}
T proxy =
(T)
Proxy.newProxyInstance(
protocol.getClassLoader(),
new Class[] {protocol},
new Invoker(protocol, addr, ticket, conf, factory, rpcTimeout));
return new ProtocolProxy<T>(protocol, proxy, true);
}
/**
* Construct a client-side proxy that implements the named protocol, talking to a server at the
* named address.
*
* @param protocol protocol
* @param clientVersion client's version
* @param addr server address
* @param ticket security ticket
* @param conf configuration
* @param factory socket factory
* @param rpcTimeout max time for each rpc; 0 means no timeout
* @return the proxy
* @throws IOException if any error occurs
*/
@SuppressWarnings("unchecked")
public static <T extends VersionedProtocol> ProtocolProxy<T> getProtocolProxy(
Class<T> protocol,
long clientVersion,
InetSocketAddress addr,
UserGroupInformation ticket,
Configuration conf,
SocketFactory factory,
int rpcTimeout)
throws IOException {
T proxy =
(T)
Proxy.newProxyInstance(
protocol.getClassLoader(),
new Class[] {protocol},
new Invoker(addr, ticket, conf, factory, rpcTimeout, protocol));
String protocolName = protocol.getName();
try {
ProtocolSignature serverInfo =
proxy.getProtocolSignature(
protocolName, clientVersion, ProtocolSignature.getFingerprint(protocol.getMethods()));
return new ProtocolProxy<T>(protocol, proxy, serverInfo.getMethods());
} catch (RemoteException re) {
IOException ioe = re.unwrapRemoteException(IOException.class);
if (ioe.getMessage()
.startsWith(IOException.class.getName() + ": " + NoSuchMethodException.class.getName())) {
// Method getProtocolSignature not supported
long serverVersion = proxy.getProtocolVersion(protocol.getName(), clientVersion);
if (serverVersion == clientVersion) {
return new ProtocolProxy<T>(protocol, proxy, null);
}
throw new VersionMismatch(protocolName, clientVersion, serverVersion, proxy);
}
throw re;
}
}
