+++ /dev/null
-/* $Id$ */
-
-/* rpc - demo of the RPC features in GRAS */
-
-/* Copyright (c) 2006 Martin Quinson. All rights reserved. */
-
-/* This program is free software; you can redistribute it and/or modify it
- * under the terms of the license (GNU LGPL) which comes with this package. */
-
-#include "gras.h"
-
-XBT_LOG_NEW_DEFAULT_CATEGORY(Rpc,"Messages specific to this example");
-
-int err=0; /* to make the message of the raised exception more informative and
- even be able to follow their propagation from server to client*/
-
-/* register messages which may be sent (common to client and server) */
-static void register_messages(void) {
- gras_msgtype_declare_rpc("plain ping",
- gras_datadesc_by_name("int"),
- gras_datadesc_by_name("int"));
-
- gras_msgtype_declare_rpc("raise exception", NULL, NULL);
- gras_msgtype_declare_rpc("forward exception", NULL, NULL);
- gras_msgtype_declare("kill",NULL);
-}
-
-/* Function prototypes */
-int server (int argc,char *argv[]);
-int forwarder (int argc,char *argv[]);
-int client (int argc,char *argv[]);
-
-static void exception_raising(void) {
- THROW1(unknown_error,42,"Some error we will catch on client side %d",err++);
-}
-static void exception_catching(void) {
- int gotit = 0,i;
- xbt_ex_t e;
-
- for (i=0; i<5; i++) {
- gotit=0;
- TRY {
- exception_raising();
- } CATCH(e) {
- gotit = 1;
- }
- if (!gotit) {
- THROW0(unknown_error,0,"Didn't got the remote exception!");
- }
- xbt_assert2(e.category == unknown_error, "Got wrong category: %d (instead of %d)",
- e.category,unknown_error);
- xbt_assert1(e.value == 42, "Got wrong value: %d (!=42)", e.value);
- xbt_assert1(!strncmp(e.msg,"Some error we will catch on client side",
- strlen("Some error we will catch on client side")),
- "Got wrong message: %s", e.msg);
- xbt_ex_free(e);
- }
-}
-
-/* **********************************************************************
- * Client code
- * **********************************************************************/
-
-
-int client(int argc,char *argv[]) {
- xbt_ex_t e;
- gras_socket_t toserver=NULL; /* peer */
- gras_socket_t toforwarder=NULL; /* peer */
-
-
-
- int ping, pong, i;
- volatile int gotit=0;
-
- const char *host = "127.0.0.1";
- int port = 4000;
-
- /* 1. Init the GRAS's infrastructure */
- gras_init(&argc, argv);
-
- /* 2. Get the server's address. The command line override defaults when specified */
- if (argc == 5) {
- host=argv[1];
- port=atoi(argv[2]);
- }
- INFO2("Launch client (server on %s:%d)",host,port);
-
- exception_catching();
-
- /* 3. Wait for the server & forwarder startup */
- gras_os_sleep(2);
-
- /* 4. Create a socket to speak to the server */
- TRY {
- exception_catching();
- toserver=gras_socket_client(host,port);
- toforwarder=gras_socket_client(argv[3],atoi(argv[4]));
- } CATCH(e) {
- RETHROW0("Unable to connect to the server: %s");
- }
- INFO2("Connected to %s:%d.",host,port);
-
-
- /* 5. Register the messages.
- See, it doesn't have to be done completely at the beginning,
- but only before use */
- exception_catching();
- register_messages();
-
- /* 6. Keep the user informed of what's going on */
- INFO2("Connected to server which is on %s:%d ",
- gras_socket_peer_name(toserver),gras_socket_peer_port(toserver));
-
- /* 7. Prepare and send the ping message to the server */
- ping = 1234;
- TRY {
- exception_catching();
- gras_msg_rpccall(toserver, 6000.0,
- gras_msgtype_by_name("plain ping"), &ping, &pong);
- } CATCH(e) {
- gras_socket_close(toserver);
- RETHROW0("Failed to execute a PING rpc on the server: %s");
- }
- exception_catching();
-
- /* 8. Keep the user informed of what's going on, again */
- INFO4("The answer to PING(%d) on %s:%d is PONG(%d) ",
- ping,
- gras_socket_peer_name(toserver),gras_socket_peer_port(toserver),
- pong);
-
- /* 9. Call a RPC which raises an exception (to test exception propagation) */
- INFO0("Call the exception raising RPC");
- TRY {
- gras_msg_rpccall(toserver, 6000.0,
- gras_msgtype_by_name("raise exception"), NULL, NULL);
- } CATCH(e) {
- gotit = 1;
- xbt_assert2(e.category == unknown_error,
- "Got wrong category: %d (instead of %d)",
- e.category,unknown_error);
- xbt_assert1(e.value == 42, "Got wrong value: %d (!=42)", e.value);
- xbt_assert1(!strncmp(e.msg,"Some error we will catch on client side",
- strlen("Some error we will catch on client side")),
- "Got wrong message: %s", e.msg);
- INFO0("Got the expected exception when calling the exception raising RPC");
- xbt_ex_free(e);
- }
-
- if (!gotit)
- THROW0(unknown_error,0,"Didn't got the remote exception!");
-
- INFO0("Called the exception raising RPC");
- exception_catching();
-
- /* doxygen_ignore */
- for (i=0; i<5; i++) {
-
- INFO1("Call the exception raising RPC (i=%d)",i);
- TRY {
- gras_msg_rpccall(toserver, 6000.0,
- gras_msgtype_by_name("raise exception"), NULL, NULL);
- } CATCH(e) {
- gotit = 1;
- xbt_ex_free(e);
- }
- if (!gotit) {
- THROW0(unknown_error,0,"Didn't got the remote exception!");
- }
- }
- /* doxygen_resume */
-
- /* 9. Call a RPC which raises an exception (to test that exception propagation works) */
- for (i=0;i<5;i++) {
- INFO1("Call the exception raising RPC on the forwarder (i=%d)",i);
- TRY {
- gras_msg_rpccall(toforwarder, 6000.0,
- gras_msgtype_by_name("forward exception"), NULL, NULL);
- } CATCH(e) {
- gotit = 1;
- }
- if (!gotit) {
- THROW0(unknown_error,0,"Didn't got the remote exception!");
- }
- xbt_assert1(e.value == 42, "Got wrong value: %d (!=42)", e.value);
- xbt_assert1(!strncmp(e.msg,"Some error we will catch on client side",
- strlen("Some error we will catch on client side")),
- "Got wrong message: %s", e.msg);
- xbt_assert2(e.category == unknown_error,
- "Got wrong category: %d (instead of %d)",
- e.category,unknown_error);
- INFO0("Got the expected exception when calling the exception raising RPC");
- xbt_ex_free(e);
- exception_catching();
- }
-
- gras_msg_send(toserver,gras_msgtype_by_name("kill"),NULL);
- gras_msg_send(toforwarder,gras_msgtype_by_name("kill"),NULL);
-
- /* 11. Cleanup the place before leaving */
- gras_socket_close(toserver);
- gras_socket_close(toforwarder);
- gras_exit();
- INFO0("Done.");
- return 0;
-} /* end_of_client */
-
-
-/* **********************************************************************
- * Forwarder code
- * **********************************************************************/
-typedef struct {
- gras_socket_t server;
- int done;
-} s_forward_data_t, *forward_data_t;
-
-static int forwarder_cb_kill(gras_msg_cb_ctx_t ctx,
- void *payload_data) {
- forward_data_t fdata=gras_userdata_get();
- fdata->done = 1;
- return 1;
-}
-
-static int forwarder_cb_forward_ex(gras_msg_cb_ctx_t ctx,
- void *payload_data) {
- forward_data_t fdata=gras_userdata_get();
-
- gras_msg_rpccall(fdata->server, 60,
- gras_msgtype_by_name("raise exception"),NULL,NULL);
- return 1;
-}
-
-int forwarder (int argc,char *argv[]) {
- gras_socket_t mysock;
- int port;
- forward_data_t fdata;
-
- gras_init(&argc,argv);
-
- xbt_assert(argc == 4);
-
- fdata=gras_userdata_new(s_forward_data_t);
- fdata->done = 0;
- port=atoi(argv[1]);
-
- INFO1("Launch forwarder (port=%d)", port);
- mysock = gras_socket_server(port);
-
- gras_os_sleep(1); /* wait for the server to be ready */
- fdata->server=gras_socket_client(argv[2],atoi(argv[3]));
-
- register_messages();
- gras_cb_register(gras_msgtype_by_name("forward exception"),
- &forwarder_cb_forward_ex);
- gras_cb_register(gras_msgtype_by_name("kill"),
- &forwarder_cb_kill);
-
- while (!fdata->done) {
- gras_msg_handle(600.0);
- }
-
- gras_socket_close(mysock);
- gras_socket_close(fdata->server);
- free(fdata);
- gras_exit();
- INFO0("Done.");
- return 0;
-}
-
-/* **********************************************************************
- * Server code
- * **********************************************************************/
-typedef struct {
- gras_socket_t server;
- int done;
-} s_server_data_t, *server_data_t;
-
-static int server_cb_kill(gras_msg_cb_ctx_t ctx,
- void *payload_data) {
- server_data_t sdata=gras_userdata_get();
- sdata->done = 1;
- return 1;
-}
-
-static int server_cb_raise_ex(gras_msg_cb_ctx_t ctx,
- void *payload_data) {
- exception_raising();
- return 1;
-}
-
-static int server_cb_ping(gras_msg_cb_ctx_t ctx,
- void *payload_data) {
-
- /* 1. Get the payload into the msg variable, and retrieve who called us */
- int msg=*(int*)payload_data;
- gras_socket_t expeditor = gras_msg_cb_ctx_from(ctx);
-
- /* 2. Log which client connected */
- INFO3("Got message PING(%d) from %s:%d ",
- msg,
- gras_socket_peer_name(expeditor), gras_socket_peer_port(expeditor));
-
- /* 4. Change the value of the msg variable */
- msg = 4321;
-
- /* 5. Return as result */
- gras_msg_rpcreturn(6000,ctx,&msg);
- INFO0("Answered with PONG(4321)");
-
- /* 6. Cleanups, if any */
-
- /* 7. Tell GRAS that we consummed this message */
- return 1;
-} /* end_of_server_cb_ping */
-
-
-int server (int argc,char *argv[]) {
- gras_socket_t mysock;
- server_data_t sdata;
-
- int port = 4000;
-
- /* 1. Init the GRAS infrastructure */
- gras_init(&argc,argv);
-
- /* 2. Get the port I should listen on from the command line, if specified */
- if (argc == 2)
- port=atoi(argv[1]);
-
- sdata=gras_userdata_new(s_server_data_t);
- sdata->done = 0;
-
- INFO1("Launch server (port=%d)", port);
-
- /* 3. Create my master socket */
- mysock = gras_socket_server(port);
-
- /* 4. Register the known messages and register my callback */
- register_messages();
- gras_cb_register(gras_msgtype_by_name("plain ping"),&server_cb_ping);
- gras_cb_register(gras_msgtype_by_name("raise exception"),&server_cb_raise_ex);
- gras_cb_register(gras_msgtype_by_name("kill"),&server_cb_kill);
-
- INFO1("Listening on port %d ", gras_socket_my_port(mysock));
-
- /* 5. Wait for the ping incomming messages */
-
- /** \bug if the server is gone before the forwarder tries to connect,
- it dies awfully with the following message. The problem stands somewhere
- at the interface between the gras_socket_t and the msg mess. There is thus
- no way for me to dive into this before this interface is rewritten
-==15875== Invalid read of size 4
-==15875== at 0x408B805: find_port (transport_plugin_sg.c:68)
-==15875== by 0x408BD64: gras_trp_sg_socket_client (transport_plugin_sg.c:115)
-==15875== by 0x404A38B: gras_socket_client_ext (transport.c:255)
-==15875== by 0x404A605: gras_socket_client (transport.c:288)
-==15875== by 0x804B49D: forwarder (rpc.c:245)
-==15875== by 0x80491FB: launch_forwarder (_rpc_simulator.c:52)
-==15875== by 0x406780B: __context_wrapper (context.c:164)
-==15875== by 0x41A6CB3: pthread_start_thread (manager.c:310)
-==15875== by 0x42AA549: clone (clone.S:119)
-==15875== Address 0x433B49C is 44 bytes inside a block of size 48 free'd
-==15875== at 0x401CF46: free (vg_replace_malloc.c:235)
-==15875== by 0x408F1FA: gras_process_exit (sg_process.c:117)
-==15875== by 0x4049386: gras_exit (gras.c:64)
-==15875== by 0x804B936: server (rpc.c:345)
-==15875== by 0x80492B1: launch_server (_rpc_simulator.c:69)
-==15875== by 0x406780B: __context_wrapper (context.c:164)
-==15875== by 0x41A6CB3: pthread_start_thread (manager.c:310)
-==15875== by 0x42AA549: clone (clone.S:119)
- */
- while (!sdata->done) {
- gras_msg_handle(600.0);
- exception_catching();
- }
-
- /* 8. Free the allocated resources, and shut GRAS down */
- free(sdata);
- gras_socket_close(mysock);
- gras_exit();
-
- INFO0("Done.");
- return 0;
-} /* end_of_server */
-
