/** Expert: Make multiple, parallel calls to a set of servers. */
public static Object[] call(
Method method,
Object[][] params,
InetSocketAddress[] addrs,
UserGroupInformation ticket,
Configuration conf)
throws IOException {
Invocation[] invocations = new Invocation[params.length];
for (int i = 0; i < params.length; i++) invocations[i] = new Invocation(method, params[i]);
Client client = CLIENTS.getClient(conf);
try {
Writable[] wrappedValues =
client.call(invocations, addrs, method.getDeclaringClass(), ticket);
if (method.getReturnType() == Void.TYPE) {
return null;
}
Object[] values = (Object[]) Array.newInstance(method.getReturnType(), wrappedValues.length);
for (int i = 0; i < values.length; i++)
if (wrappedValues[i] != null) values[i] = ((ObjectWritable) wrappedValues[i]).get();
return values;
} finally {
CLIENTS.stopClient(client);
}
}
public Invoker(
Class<?> protocol,
InetSocketAddress address,
UserGroupInformation ticket,
Configuration conf,
SocketFactory factory,
int rpcTimeout)
throws IOException {
this.remoteId =
Client.ConnectionId.getConnectionId(address, protocol, ticket, rpcTimeout, conf);
this.client = CLIENTS.getClient(conf, factory);
}
public Invoker(
InetSocketAddress address,
UserGroupInformation ticket,
Configuration conf,
SocketFactory factory,
int rpcTimeout,
Class<?> protocol) {
this.address = address;
this.ticket = ticket;
this.client = CLIENTS.getClient(conf, factory);
this.rpcTimeout = rpcTimeout;
this.protocol = protocol;
}
static Client getClient(Configuration conf, SocketFactory socketFactory) {
return CLIENTS.getClient(conf, socketFactory);
}
/* close the IPC client that's responsible for this invoker's RPCs */
private synchronized void close() {
if (!isClosed) {
isClosed = true;
CLIENTS.stopClient(client);
}
}
// for unit testing only
@InterfaceAudience.Private
@InterfaceStability.Unstable
static Client getClient(Configuration conf) {
return CLIENTS.getClient(conf);
}