EXPORT_SYM struct hdfs_namenode *
hdfs_namenode_new_version(const char *host, const char *port,
const char *username, enum hdfs_kerb kerb_pref,
enum hdfs_namenode_proto vers, const char **error_out)
{
const char *error;
struct hdfs_namenode *h;
h = hdfs_namenode_allocate();
hdfs_namenode_init(h, kerb_pref);
hdfs_namenode_set_version(h, vers);
error = hdfs_namenode_connect(h, host, port);
if (error)
goto out;
error = hdfs_namenode_authenticate(h, username);
if (error)
goto out;
out:
if (error) {
hdfs_namenode_delete(h);
h = NULL;
*error_out = error;
}
return h;
}
int
main(int argc, char **argv)
{
const char *error,
*host = "localhost",
*port = "8020";
struct hdfs_namenode namenode;
#define NTHR 100
pthread_t threads[NTHR];
unsigned i;
int rc;
if (argc > 1) {
if (strcmp(argv[1], "-h") == 0) {
printf("Usage: ./helloworld [host [port]]\n");
exit(0);
}
host = argv[1];
if (argc > 2)
port = argv[2];
}
// Initialize the connection object and connect to the local namenode
hdfs_namenode_init(&namenode, HDFS_NO_KERB);
error = hdfs_namenode_connect(&namenode, host, port);
if (error)
goto out;
// Pretend to be the user "root"
error = hdfs_namenode_authenticate(&namenode, "root");
if (error)
goto out;
for (i = 0; i < NTHR; i++) {
int rc;
rc = pthread_create(&threads[i], NULL, athread, &namenode);
if (rc != 0) {
errno = rc;
err(1, "pthread_create");
}
}
for (i = 0; i < NTHR; i++) {
rc = pthread_join(threads[i], NULL);
if (rc != 0) {
errno = rc;
err(1, "pthread_join");
}
}
out:
if (error)
fprintf(stderr, "hdfs error: %s\n", error);
// Destroy any resources used by the connection
hdfs_namenode_destroy(&namenode, NULL);
return 0;
}
int
main(int argc, char **argv)
{
const char *err,
*host = "localhost",
*port = "8020";
struct hdfs_namenode namenode;
struct hdfs_object *rpc;
struct hdfs_rpc_response_future future;
struct hdfs_object *object;
if (argc > 1) {
if (strcmp(argv[1], "-h") == 0) {
printf("Usage: ./helloworld [host [port]]\n");
exit(0);
}
host = argv[1];
if (argc > 2)
port = argv[2];
}
// Initialize the connection object and connect to the local namenode
hdfs_namenode_init(&namenode, HDFS_NO_KERB);
err = hdfs_namenode_connect(&namenode, host, port);
if (err)
goto out;
// Pretend to be the user "mapred"
err = hdfs_namenode_authenticate(&namenode, "mapred");
if (err)
goto out;
// Call getProtocolVersion(61)
future = HDFS_RPC_RESPONSE_FUTURE_INITIALIZER;
rpc = hdfs_rpc_invocation_new(
"getProtocolVersion",
hdfs_string_new(HADOOFUS_CLIENT_PROTOCOL_STR),
hdfs_long_new(61),
NULL);
err = hdfs_namenode_invoke(&namenode, rpc, &future);
hdfs_object_free(rpc);
if (err)
goto out;
// Get the response (should be long(61))
hdfs_future_get(&future, &object);
if (object->ob_type == H_LONG &&
object->ob_val._long._val == 61L)
printf("success\n");
else
printf("bad result\n");
hdfs_object_free(object);
out:
if (err)
fprintf(stderr, "hdfs error: %s\n", err);
// Destroy any resources used by the connection
hdfs_namenode_destroy(&namenode, NULL);
return 0;
}