/** 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); } }
/** * Stop a RPC client connection A RPC client is closed only when its reference count becomes * zero. */ private void stopClient(Client client) { synchronized (this) { client.decCount(); if (client.isZeroReference()) { clients.remove(client.getSocketFactory()); } } if (client.isZeroReference()) { client.stop(); } }
/** * Construct & cache an IPC client with the user-provided SocketFactory if no cached client * exists. * * @param conf Configuration * @return an IPC client */ private synchronized Client getClient(Configuration conf, SocketFactory factory) { // Construct & cache client. The configuration is only used for timeout, // and Clients have connection pools. So we can either (a) lose some // connection pooling and leak sockets, or (b) use the same timeout for all // configurations. Since the IPC is usually intended globally, not // per-job, we choose (a). Client client = clients.get(factory); if (client == null) { client = new Client(ObjectWritable.class, conf, factory); clients.put(factory, client); } else { client.incCount(); } return client; }
public Object invoke(Object proxy, Method method, Object[] args) throws Throwable { final boolean logDebug = LOG.isDebugEnabled(); long startTime = 0; if (logDebug) { startTime = System.currentTimeMillis(); } ObjectWritable value = null; try { value = (ObjectWritable) client.call( new Invocation(method, args), getAddress(), protocol, ticket, rpcTimeout); } catch (RemoteException re) { throw re; } catch (ConnectException ce) { needCheckDnsUpdate = true; throw ce; } catch (NoRouteToHostException nrhe) { needCheckDnsUpdate = true; throw nrhe; } catch (PortUnreachableException pue) { needCheckDnsUpdate = true; throw pue; } catch (UnknownHostException uhe) { needCheckDnsUpdate = true; throw uhe; } if (logDebug) { long callTime = System.currentTimeMillis() - startTime; LOG.debug("Call: " + method.getName() + " " + callTime); } return value.get(); }
public Object invoke(Object proxy, Method method, Object[] args) throws Throwable { long startTime = 0; if (LOG.isDebugEnabled()) { startTime = Time.now(); } ObjectWritable value = (ObjectWritable) client.call(RPC.RpcKind.RPC_WRITABLE, new Invocation(method, args), remoteId); if (LOG.isDebugEnabled()) { long callTime = Time.now() - startTime; LOG.debug("Call: " + method.getName() + " " + callTime); } return value.get(); }