// Register protocol and its impl for rpc calls
void registerProtocolAndImpl(RpcKind rpcKind, Class<?> protocolClass, Object protocolImpl) {
String protocolName = RPC.getProtocolName(protocolClass);
long version;
try {
version = RPC.getProtocolVersion(protocolClass);
} catch (Exception ex) {
LOG.warn("Protocol " + protocolClass + " NOT registered as cannot get protocol version ");
return;
}
getProtocolImplMap(rpcKind)
.put(
new ProtoNameVer(protocolName, version),
new ProtoClassProtoImpl(protocolClass, protocolImpl));
LOG.debug(
"RpcKind = "
+ rpcKind
+ " Protocol Name = "
+ protocolName
+ " version="
+ version
+ " ProtocolImpl="
+ protocolImpl.getClass().getName()
+ " protocolClass="
+ protocolClass.getName());
}
@Override
public boolean isMethodSupported(String methodName) throws IOException {
return RpcClientUtil.isMethodSupported(
rpcProxy,
ClientDatanodeProtocolPB.class,
RPC.RpcKind.RPC_PROTOCOL_BUFFER,
RPC.getProtocolVersion(ClientDatanodeProtocolPB.class),
methodName);
}
private static Object createNameNodeProxy(
InetSocketAddress address, Configuration conf, UserGroupInformation ugi, Class<?> xface)
throws IOException {
RPC.setProtocolEngine(conf, xface, ProtobufRpcEngine.class);
Object proxy =
RPC.getProxy(
xface,
RPC.getProtocolVersion(xface),
address,
ugi,
conf,
NetUtils.getDefaultSocketFactory(conf));
return proxy;
}
public Invocation(Method method, Object[] parameters) {
this.methodName = method.getName();
this.parameterClasses = method.getParameterTypes();
this.parameters = parameters;
rpcVersion = writableRpcVersion;
if (method.getDeclaringClass().equals(VersionedProtocol.class)) {
// VersionedProtocol is exempted from version check.
clientVersion = 0;
clientMethodsHash = 0;
} else {
this.clientVersion = RPC.getProtocolVersion(method.getDeclaringClass());
this.clientMethodsHash =
ProtocolSignature.getFingerprint(method.getDeclaringClass().getMethods());
}
this.declaringClassProtocolName = RPC.getProtocolName(method.getDeclaringClass());
}
private static ClientProtocol createNNProxyWithClientProtocol(
InetSocketAddress address,
Configuration conf,
UserGroupInformation ugi,
boolean withRetries,
AtomicBoolean fallbackToSimpleAuth)
throws IOException {
RPC.setProtocolEngine(conf, ClientNamenodeProtocolPB.class, ProtobufRpcEngine.class);
final RetryPolicy defaultPolicy =
RetryUtils.getDefaultRetryPolicy(
conf,
HdfsClientConfigKeys.Retry.POLICY_ENABLED_KEY,
HdfsClientConfigKeys.Retry.POLICY_ENABLED_DEFAULT,
HdfsClientConfigKeys.Retry.POLICY_SPEC_KEY,
HdfsClientConfigKeys.Retry.POLICY_SPEC_DEFAULT,
SafeModeException.class.getName());
final long version = RPC.getProtocolVersion(ClientNamenodeProtocolPB.class);
ClientNamenodeProtocolPB proxy =
RPC.getProtocolProxy(
ClientNamenodeProtocolPB.class,
version,
address,
ugi,
conf,
NetUtils.getDefaultSocketFactory(conf),
org.apache.hadoop.ipc.Client.getTimeout(conf),
defaultPolicy,
fallbackToSimpleAuth)
.getProxy();
if (withRetries) { // create the proxy with retries
Map<String, RetryPolicy> methodNameToPolicyMap = new HashMap<String, RetryPolicy>();
ClientProtocol translatorProxy = new ClientNamenodeProtocolTranslatorPB(proxy);
return (ClientProtocol)
RetryProxy.create(
ClientProtocol.class,
new DefaultFailoverProxyProvider<ClientProtocol>(
ClientProtocol.class, translatorProxy),
methodNameToPolicyMap,
defaultPolicy);
} else {
return new ClientNamenodeProtocolTranslatorPB(proxy);
}
}
static ClientDatanodeProtocolPB createClientDatanodeProtocolProxy(
InetSocketAddress addr,
UserGroupInformation ticket,
Configuration conf,
SocketFactory factory,
int socketTimeout)
throws IOException {
RPC.setProtocolEngine(conf, ClientDatanodeProtocolPB.class, ProtobufRpcEngine.class);
return RPC.getProxy(
ClientDatanodeProtocolPB.class,
RPC.getProtocolVersion(ClientDatanodeProtocolPB.class),
addr,
ticket,
conf,
factory,
socketTimeout);
}