unsigned char* CassandraFS::read_block(CassUuid* physical_file_id, int block, int* bytes_read) {
CassStatement* statement = cass_statement_new("SELECT data, size FROM file_blocks WHERE physical_file_id = ? AND block_number = ?", 2);
cass_statement_bind_uuid(statement, 0, *physical_file_id);
cass_statement_bind_int32(statement, 1, block);
unsigned char* return_data = NULL;
CassFuture* result_future = cass_session_execute(ctxt->session, statement);
cass_statement_free(statement);
if (cass_future_error_code(result_future) == CASS_OK) {
const CassResult* result = cass_future_get_result(result_future);
CassIterator* rows = cass_iterator_from_result(result);
if (cass_iterator_next(rows)) {
const CassRow* row = cass_iterator_get_row(rows);
const CassValue* data_value = cass_row_get_column_by_name(row, "data");
const CassValue* size_value = cass_row_get_column_by_name(row, "size");
const cass_byte_t* cass_data;
size_t size;
int size2;
cass_value_get_bytes(data_value, &cass_data, &size);
cass_value_get_int32(size_value, &size2);
// Let's use the value from "size" field unless bigger than the actual data.
if (size2>size) {
warning("Problem: size field is showing value %d which is bigger than the actual block data length %zu", size2, size);
size2 = size;
}
return_data = (unsigned char*)malloc(size2);
memcpy(return_data, cass_data, size2);
(*bytes_read) = size2;
}
cass_result_free(result);
cass_iterator_free(rows);
} else {
/* Handle error */
cassandra_log_error(result_future);
}
cass_future_free(result_future);
return return_data;
}
CassFuture* CassandraFS::sub_entries(const char* path, int limit) {
CassStatement* statement = NULL;
if (limit > 0) {
statement = cass_statement_new("select sub_path FROM sub_entries WHERE parent_path = ? LIMIT ?", 2);
cass_statement_bind_int32(statement, 1, limit);
} else {
statement = cass_statement_new("select sub_path FROM sub_entries WHERE parent_path = ?", 1);
}
cass_statement_bind_string(statement, 0, path);
CassFuture* result_future = cass_session_execute(ctxt->session, statement);
cass_statement_free(statement);
return result_future;
}
CassFuture* CassandraFS::create_file_entry(const char* path, CassUuid* uuid, mode_t mode) {
CassStatement* statement = cass_statement_new("INSERT INTO entries(path, mode, created_at, modified_at, physical_file_id) VALUES(?,?,?,?, ?)", 5);
cass_statement_bind_string(statement, 0, path);
cass_statement_bind_int32(statement, 1, mode);
cass_statement_bind_int64(statement, 2, time(NULL)*1000);
cass_statement_bind_int64(statement, 3, time(NULL)*1000);
cass_statement_bind_uuid(statement, 4, *uuid);
CassFuture* result_future = cass_session_execute(ctxt->session, statement);
cass_statement_free(statement);
return result_future;
}
void DbCassandra::Delete( const std::string &key )
{
DbPtr db = db_;
if ( db )
{
auto statement = cass_prepared_bind( db_->GetPreparedDelete() );
cass_statement_bind_string( statement, 0, key.c_str() );
auto query_future = cass_session_execute( db_->GetSession(), statement );
cass_statement_free( statement );
CassError err = cass_future_error_code( query_future );
cass_future_free( query_future );
if ( err != CASS_OK )
throw std::logic_error( cass_error_desc( err ) );
}
}
CassFuture* CassandraFS::remove_sub_entry(const char* path) {
CassStatement* statement = cass_statement_new("DELETE FROM sub_entries WHERE parent_path = ? AND sub_path = ?", 2);
char *subpathc = strdup(path);
char *parentpathc = strdup(path);
cass_statement_bind_string(statement, 0, dirname(parentpathc));
cass_statement_bind_string(statement, 1, basename(subpathc));
free(subpathc);
free(parentpathc);
CassFuture* result_future = cass_session_execute(ctxt->session, statement);
cass_statement_free(statement);
return result_future;
}
CassFuture* CassandraFS::create_sub_entry(const char* path) {
CassStatement* statement = cass_statement_new("INSERT INTO sub_entries(sub_path, parent_path) VALUES(?,?)", 2);
char *subpathc = strdup(path);
char *parentpathc = strdup(path);
cass_statement_bind_string(statement, 0, basename(subpathc));
cass_statement_bind_string(statement, 1, dirname(parentpathc));
CassFuture* result_future = cass_session_execute(ctxt->session, statement);
cass_statement_free(statement);
free(subpathc);
free(parentpathc);
return result_future;
}
CassError execute_query(CassSession* session, const char* query) {
CassError rc = CASS_OK;
CassStatement* statement = cass_statement_new(query, 0);
CassFuture* future = cass_session_execute(session, statement);
cass_future_wait(future);
rc = cass_future_error_code(future);
if (rc != CASS_OK) {
print_error(future);
}
cass_future_free(future);
cass_statement_free(statement);
return rc;
}
CassError select_from_maps(CassSession* session, const char* key) {
CassError rc = CASS_OK;
CassStatement* statement = NULL;
CassFuture* future = NULL;
const char* query = "SELECT items FROM examples.maps WHERE key = ?";
statement = cass_statement_new(query, 1);
cass_statement_bind_string(statement, 0, key);
future = cass_session_execute(session, statement);
cass_future_wait(future);
rc = cass_future_error_code(future);
if (rc != CASS_OK) {
print_error(future);
} else {
const CassResult* result = cass_future_get_result(future);
if (cass_result_row_count(result) > 0) {
const CassRow* row = cass_result_first_row(result);
CassIterator* iterator
= cass_iterator_from_map(
cass_row_get_column(row, 0));
while (cass_iterator_next(iterator)) {
const char* key;
size_t key_length;
cass_int32_t value;
cass_value_get_string(cass_iterator_get_map_key(iterator), &key, &key_length);
cass_value_get_int32(cass_iterator_get_map_value(iterator), &value);
printf("item: '%.*s' : %d \n", (int)key_length, key, value);
}
cass_iterator_free(iterator);
}
cass_result_free(result);
}
cass_future_free(future);
cass_statement_free(statement);
return rc;
}
CassError select_from_collections(CassSession* session, const char* key) {
CassError rc = CASS_OK;
CassStatement* statement = NULL;
CassFuture* future = NULL;
const char* query = "SELECT items FROM examples.collections WHERE key = ?";
statement = cass_statement_new(query, 1);
cass_statement_bind_string(statement, 0, key);
future = cass_session_execute(session, statement);
cass_future_wait(future);
rc = cass_future_error_code(future);
if (rc != CASS_OK) {
print_error(future);
} else {
const CassResult* result = cass_future_get_result(future);
CassIterator* iterator = cass_iterator_from_result(result);
if (cass_iterator_next(iterator)) {
const CassValue* value = NULL;
const CassRow* row = cass_iterator_get_row(iterator);
CassIterator* items_iterator = NULL;
value = cass_row_get_column(row, 0);
items_iterator = cass_iterator_from_collection(value);
while (cass_iterator_next(items_iterator)) {
const char* item;
size_t item_length;
cass_value_get_string(cass_iterator_get_value(items_iterator), &item, &item_length);
printf("item: %.*s\n", (int)item_length, item);
}
cass_iterator_free(items_iterator);
}
cass_result_free(result);
cass_iterator_free(iterator);
}
cass_future_free(future);
cass_statement_free(statement);
return rc;
}
void on_insert(CassFuture* future, void* data) {
CassError code = cass_future_error_code(future);
if (code != CASS_OK) {
print_error(future);
signal_exit((CassSession*)data);
} else {
const char* select_query = "SELECT * FROM callbacks";
CassStatement* statement
= cass_statement_new(select_query, 0);
CassFuture* select_future
= cass_session_execute((CassSession*)data, statement);
cass_future_set_callback(select_future, on_select, data);
cass_statement_free(statement);
cass_future_free(select_future);
}
}
CassError select_from(CassSession* session, const char* key) {
CassError rc = CASS_OK;
CassStatement* statement = NULL;
CassFuture* future = NULL;
const char* query = "SELECT * FROM examples.date_time WHERE key = ?";
statement = cass_statement_new(query, 1);
cass_statement_bind_string(statement, 0, key);
future = cass_session_execute(session, statement);
cass_future_wait(future);
rc = cass_future_error_code(future);
if (rc != CASS_OK) {
print_error(future);
} else {
const CassResult* result = cass_future_get_result(future);
CassIterator* iterator = cass_iterator_from_result(result);
if (cass_iterator_next(iterator)) {
cass_uint32_t d;
cass_int64_t t;
time_t time;
const CassRow* row = cass_iterator_get_row(iterator);
cass_value_get_uint32(cass_row_get_column(row, 1), &d);
cass_value_get_int64(cass_row_get_column(row, 2), &t);
time = (time_t)cass_date_time_to_epoch(d, t);
printf("Date and time: %s", asctime(localtime(&time)));
}
cass_result_free(result);
cass_iterator_free(iterator);
}
cass_future_free(future);
cass_statement_free(statement);
return rc;
}
int CassandraFS::update_timestamps(const char* path, const struct timespec last_access_stamp, const struct timespec last_modification_stamp) {
CassStatement* statement = cass_statement_new("UPDATE entries SET modified_at = ? WHERE path = ?", 2);
cass_statement_bind_int64(statement, 0, last_modification_stamp.tv_sec * 1000 + (last_modification_stamp.tv_nsec / 1000000));
cass_statement_bind_string(statement, 1, path);
CassFuture* result_future = cass_session_execute(ctxt->session, statement);
cass_statement_free(statement);
int error = 0;
if (cass_future_error_code(result_future) == CASS_OK) {
// Nada
} else {
/* Handle error */
error = -EIO;
cassandra_log_error(result_future);
}
cass_future_free(result_future);
return error;
}
int CassandraFS::update_mode(const char* path, mode_t new_mode) {
CassStatement* statement = cass_statement_new("UPDATE entries SET mode = ? WHERE path = ?", 2);
cass_statement_bind_int32(statement, 0, new_mode);
cass_statement_bind_string(statement, 1, path);
CassFuture* result_future = cass_session_execute(ctxt->session, statement);
cass_statement_free(statement);
int error = 0;
if (cass_future_error_code(result_future) == CASS_OK) {
// Nada
} else {
/* Handle error */
error = -EIO;
cassandra_log_error(result_future);
}
cass_future_free(result_future);
return error;
}
static int
librdf_storage_cassandra_size(librdf_storage* storage)
{
librdf_storage_cassandra_instance* context;
context = (librdf_storage_cassandra_instance*)storage->instance;
char* query = "SELECT count(s) FROM rdf.spo";
CassStatement* stmt = cass_statement_new(query, 0);
CassFuture* future = cass_session_execute(context->session, stmt);
cass_statement_free(stmt);
CassError rc = cass_future_error_code(future);
if (rc != CASS_OK) {
fprintf(stderr, "Cassandra: %s\n", cass_error_desc(rc));
const char* msg;
size_t msg_len;
cass_future_error_message(future, &msg, &msg_len);
fprintf(stderr, "Cassandra: %*s\n", msg_len, msg);
cass_future_free(future);
return 0;
}
const CassResult* result = cass_future_get_result(future);
cass_future_free(future);
const CassRow* row = cass_result_first_row(result);
int64_t count;
cass_value_get_int64(cass_row_get_column(row, 0), &count);
cass_result_free(result);
return count;
}
CassError select_from_basic(CassSession* session, const char* key, Basic* basic) {
CassError rc = CASS_OK;
CassStatement* statement = NULL;
CassFuture* future = NULL;
const char* query
= "SELECT * FROM examples.basic WHERE key = ?";
statement = cass_statement_new(query, 1);
cass_statement_bind_string_by_name(statement, "key", key);
future = cass_session_execute(session, statement);
cass_future_wait(future);
rc = cass_future_error_code(future);
if (rc != CASS_OK) {
print_error(future);
} else {
const CassResult* result = cass_future_get_result(future);
CassIterator* iterator = cass_iterator_from_result(result);
if (cass_iterator_next(iterator)) {
const CassRow* row = cass_iterator_get_row(iterator);
cass_value_get_bool(cass_row_get_column_by_name(row, "BLN"), &basic->bln);
cass_value_get_double(cass_row_get_column_by_name(row, "dbl"), &basic->dbl);
cass_value_get_float(cass_row_get_column_by_name(row, "flt"), &basic->flt);
cass_value_get_int32(cass_row_get_column_by_name(row, "\"i32\""), &basic->i32);
cass_value_get_int64(cass_row_get_column_by_name(row, "i64"), &basic->i64);
}
cass_result_free(result);
cass_iterator_free(iterator);
}
cass_future_free(future);
cass_statement_free(statement);
return rc;
}
void insert_into_perf(CassSession* session, const char* query, const CassPrepared* prepared) {
int i;
CassFuture* futures[NUM_CONCURRENT_REQUESTS];
CassCollection* collection = cass_collection_new(CASS_COLLECTION_TYPE_SET, 2);
cass_collection_append_string(collection, "jazz");
cass_collection_append_string(collection, "2013");
for (i = 0; i < NUM_CONCURRENT_REQUESTS; ++i) {
CassUuid id;
CassStatement* statement;
if (prepared != NULL) {
statement = cass_prepared_bind(prepared);
} else {
statement = cass_statement_new(query, 5);
}
cass_uuid_gen_time(uuid_gen, &id);
cass_statement_bind_uuid(statement, 0, id);
cass_statement_bind_string(statement, 1, big_string);
cass_statement_bind_string(statement, 2, big_string);
cass_statement_bind_string(statement, 3, big_string);
cass_statement_bind_collection(statement, 4, collection);
futures[i] = cass_session_execute(session, statement);
cass_statement_free(statement);
}
for (i = 0; i < NUM_CONCURRENT_REQUESTS; ++i) {
CassFuture* future = futures[i];
CassError rc = cass_future_error_code(future);
if (rc != CASS_OK) {
print_error(future);
}
cass_future_free(future);
}
cass_collection_free(collection);
}
CassError CassandraFS::read_physical_file_info(struct stat* stat, struct cfs_attrs* cfs_attrs) {
CassStatement* statement = cass_statement_new("SELECT size, block_size FROM physical_files WHERE id = ?", 1);
cass_statement_bind_uuid(statement, 0, cfs_attrs->physical_file_id);
CassFuture* result_future = cass_session_execute(ctxt->session, statement);
cass_statement_free(statement);
CassError error = cass_future_error_code(result_future);
if (error == CASS_OK) {
/* Retrieve result set and iterate over the rows */
const CassResult* result = cass_future_get_result(result_future);
CassIterator* rows = cass_iterator_from_result(result);
if (cass_iterator_next(rows)) {
const CassRow* row = cass_iterator_get_row(rows);
const CassValue* size_value = cass_row_get_column_by_name(row, "size");
if (!cass_value_is_null(size_value)) {
cass_int64_t size;
cass_value_get_int64(size_value, &size);
stat->st_size = size;
}
const CassValue* block_size_value = cass_row_get_column_by_name(row, "block_size");
if (!cass_value_is_null(block_size_value)) {
int size;
cass_value_get_int32(block_size_value, &size);
cfs_attrs->block_size = size;
}
}
cass_result_free(result);
cass_iterator_free(rows);
} else {
/* Handle error */
cassandra_log_error(result_future);
}
cass_future_free(result_future);
return error;
}
void CassDriver::Store(void (*cob)(CassFuture* future, void* data),
const Message& message, void* cb_data) {
CassStatement* statement = cass_prepared_bind(insert_prepared_);
cass_statement_bind_string(statement, 0,
cass_string_init(message.receiver_id.c_str()));
cass_statement_bind_string(statement, 1,
cass_string_init(message.timestamp.c_str()));
cass_statement_bind_string(statement, 2,
cass_string_init(message.msg_id.c_str()));
cass_statement_bind_string(statement, 3,
cass_string_init(message.group_id.c_str()));
cass_statement_bind_string(statement, 4,
cass_string_init(message.msg.c_str()));
cass_statement_bind_string(statement, 5,
cass_string_init(message.sender_id.c_str()));
CassFuture* future = cass_session_execute(session_, statement);
cass_future_set_callback(future, cob, cb_data);
cass_future_free(future);
cass_statement_free(statement);
}
int CassandraFS::truncate(const char* path, off_t size) {
CassStatement* statement = NULL;
struct stat stat;
struct cfs_attrs cfs_attrs;
CassandraFutureSpool* spool = new CassandraFutureSpool(4);
int err = getattr(path, &stat, &cfs_attrs);
if (err != 0) {
return -EIO;
}
statement = cass_statement_new("UPDATE physical_files SET size = ? WHERE id = ?", 2);
cass_statement_bind_int64(statement, 0, size);
cass_statement_bind_uuid(statement, 1, cfs_attrs.physical_file_id);
spool->append(cass_session_execute(ctxt->session, statement));
cass_statement_free(statement);
off_t current_size = stat.st_size;
int current_blocks = blocks_needed(current_size, cfs_attrs.block_size);
int needed_blocks = blocks_needed(size, cfs_attrs.block_size);
for (int a = needed_blocks; a<current_blocks; a++) {
spool->append(delete_file_block(&stat, &cfs_attrs, a));
}
if (size % cfs_attrs.block_size > 0) {
spool->append(truncate_block(&stat, &cfs_attrs, needed_blocks-1, size % cfs_attrs.block_size));
}
spool->wait_all();
int errors = spool->get_errors();
delete spool;
if (errors>0) {
return -EIO;
}
return 0;
}
void insert_into_async(CassSession* session, const char* key) {
CassError rc = CASS_OK;
CassStatement* statement = NULL;
const char* query = "INSERT INTO async (key, bln, flt, dbl, i32, i64) VALUES (?, ?, ?, ?, ?, ?);";
CassFuture* futures[NUM_CONCURRENT_REQUESTS];
size_t i;
for (i = 0; i < NUM_CONCURRENT_REQUESTS; ++i) {
char key_buffer[64];
statement = cass_statement_new(query, 6);
sprintf(key_buffer, "%s%u", key, (unsigned int)i);
cass_statement_bind_string(statement, 0, key_buffer);
cass_statement_bind_bool(statement, 1, i % 2 == 0 ? cass_true : cass_false);
cass_statement_bind_float(statement, 2, i / 2.0f);
cass_statement_bind_double(statement, 3, i / 200.0);
cass_statement_bind_int32(statement, 4, (cass_int32_t)(i * 10));
cass_statement_bind_int64(statement, 5, (cass_int64_t)(i * 100));
futures[i] = cass_session_execute(session, statement);
cass_statement_free(statement);
}
for (i = 0; i < NUM_CONCURRENT_REQUESTS; ++i) {
CassFuture* future = futures[i];
cass_future_wait(future);
rc = cass_future_error_code(future);
if (rc != CASS_OK) {
print_error(future);
}
cass_future_free(future);
}
}
CassError select_from_basic(CassSession* session, const CassPrepared * prepared, const char* key, Basic* basic) {
CassError rc = CASS_OK;
CassStatement* statement = NULL;
CassFuture* future = NULL;
statement = cass_prepared_bind(prepared);
cass_statement_bind_string(statement, 0, key);
future = cass_session_execute(session, statement);
cass_future_wait(future);
rc = cass_future_error_code(future);
if (rc != CASS_OK) {
print_error(future);
} else {
const CassResult* result = cass_future_get_result(future);
CassIterator* iterator = cass_iterator_from_result(result);
if (cass_iterator_next(iterator)) {
const CassRow* row = cass_iterator_get_row(iterator);
cass_value_get_bool(cass_row_get_column(row, 1), &basic->bln);
cass_value_get_double(cass_row_get_column(row, 2), &basic->dbl);
cass_value_get_float(cass_row_get_column(row, 3), &basic->flt);
cass_value_get_int32(cass_row_get_column(row, 4), &basic->i32);
cass_value_get_int64(cass_row_get_column(row, 5), &basic->i64);
}
cass_result_free(result);
cass_iterator_free(iterator);
}
cass_future_free(future);
cass_statement_free(statement);
return rc;
}
inline CassError CassandraClient::executeStatement(std::string cqlStatement) {
CassError rc = CASS_OK;
CassFuture* result_future = NULL;
logger.trace("Executing CQL Command");
CassStatement* statement = cass_statement_new(cqlStatement.c_str(), 0);
result_future = cass_session_execute(session, statement);
cass_future_wait(result_future);
rc = cass_future_error_code(result_future);
if (rc == CASS_OK) {
logger.trace("Executing CQL Command: Success");
} else {
return printError(rc);
}
cass_statement_free(statement);
cass_future_free(result_future);
return rc;
}
void DbCassandra::GetAll( GetCallback callback )
{
DbPtr db = db_;
if ( db )
{
auto statement = cass_statement_new( "SELECT * FROM prun.jobs;", 0 );
auto query_future = cass_session_execute( db_->GetSession(), statement );
cass_statement_free( statement );
CassError err = cass_future_error_code( query_future );
if ( err != CASS_OK )
{
cass_future_free( query_future );
throw std::logic_error( cass_error_desc( err ) );
}
auto result = cass_future_get_result( query_future );
cass_future_free( query_future );
auto iterator = cass_iterator_from_result( result );
while( cass_iterator_next( iterator ) )
{
const CassRow *row = cass_iterator_get_row( iterator );
const char *job_id, *job_descr;
size_t job_id_length, job_descr_length;
cass_value_get_string( cass_row_get_column( row, 0 ), &job_id, &job_id_length );
cass_value_get_string( cass_row_get_column( row, 1 ), &job_descr, &job_descr_length );
callback( std::string( job_id, job_id_length ), std::string( job_descr, job_descr_length ) );
}
cass_iterator_free( iterator );
cass_result_free( result );
}
}
inline ~CassandraStatement()
{
if (statement)
cass_statement_free(statement);
}
int main(int argc, char* argv[]) {
/* Setup and connect to cluster */
CassFuture* connect_future = NULL;
CassCluster* cluster = cass_cluster_new();
CassSession* session = cass_session_new();
CassSsl* ssl = cass_ssl_new();
char* hosts = "127.0.0.1";
if (argc > 1) {
hosts = argv[1];
}
cass_cluster_set_contact_points(cluster, hosts);
/* Only verify the certification and not the identity */
cass_ssl_set_verify_flags(ssl, CASS_SSL_VERIFY_PEER_CERT);
if (!load_trusted_cert_file("cert.pem", ssl)) {
fprintf(stderr, "Failed to load certificate disabling peer verification\n");
cass_ssl_set_verify_flags(ssl, CASS_SSL_VERIFY_NONE);
}
cass_cluster_set_ssl(cluster, ssl);
connect_future = cass_session_connect(session, cluster);
if (cass_future_error_code(connect_future) == CASS_OK) {
CassFuture* close_future = NULL;
/* Build statement and execute query */
const char* query = "SELECT release_version FROM system.local";
CassStatement* statement = cass_statement_new(query, 0);
CassFuture* result_future = cass_session_execute(session, statement);
if (cass_future_error_code(result_future) == CASS_OK) {
/* Retrieve result set and get the first row */
const CassResult* result = cass_future_get_result(result_future);
const CassRow* row = cass_result_first_row(result);
if (row) {
const CassValue* value = cass_row_get_column_by_name(row, "release_version");
const char* release_version;
size_t release_version_length;
cass_value_get_string(value, &release_version, &release_version_length);
printf("release_version: '%.*s'\n", (int)release_version_length,
release_version);
}
cass_result_free(result);
} else {
/* Handle error */
const char* message;
size_t message_length;
cass_future_error_message(result_future, &message, &message_length);
fprintf(stderr, "Unable to run query: '%.*s'\n", (int)message_length,
message);
}
cass_statement_free(statement);
cass_future_free(result_future);
/* Close the session */
close_future = cass_session_close(session);
cass_future_wait(close_future);
cass_future_free(close_future);
} else {
/* Handle error */
const char* message;
size_t message_length;
cass_future_error_message(connect_future, &message, &message_length);
fprintf(stderr, "Unable to connect: '%.*s'\n", (int)message_length,
message);
}
cass_future_free(connect_future);
cass_cluster_free(cluster);
cass_session_free(session);
cass_ssl_free(ssl);
return 0;
}
static void
free_statement(void *statement)
{
cass_statement_free((CassStatement *) statement);
}
static std::string LoadFile(Upload& upload)
{
std::stringstream ss;
DatabaseSession session;
try {
CassError rc = CASS_OK;
//std::string str = ("SELECT upload_id, model_id, date, processed, result {includeFile} FROM prophet.models {onlyPending}");
std::string str = "SELECT chunk from prophet.uploadchunks where model_id = ? and upload_id = ?";
CassStatement* statement = cass_statement_new(str.c_str(), 2);
cass_statement_bind_uuid(statement, 0, upload.ModelId());
cass_statement_bind_uuid(statement, 1, upload.UploadId());
CassFuture * future = cass_session_execute(session.Session(), statement);
cass_future_wait(future);
rc = cass_future_error_code(future);
if (rc != CASS_OK) {
auto err = std::string("Failed to execute query: ")
+ CassandraUtils::GetCassandraError(future);
cass_future_free(future);
cass_statement_free(statement);
throw err;
}
else {
const CassResult* result = cass_future_get_result(future);
CassIterator* iterator = cass_iterator_from_result(result);
while (cass_iterator_next(iterator)) {
const CassRow* row = cass_iterator_get_row(iterator);
std::string buffer;
CassString::Load(buffer, cass_row_get_column(row, 0));
ss << buffer;
}
cass_result_free(result);
cass_iterator_free(iterator);
}
cass_future_free(future);
cass_statement_free(statement);
}
catch (...) {
std::exception_ptr e = std::current_exception();
try {
if (e) {
std::rethrow_exception(e);
}
}
catch (const std::exception& ex) {
std::cout << "Caught exception \"" << ex.what() << "\"\n";
}
}
return ss.str();
}
void CassDriver::Retrieve(
std::tr1::function<void(bool success, Wrapper* data)> cob,
const std::string& receiver_id, Wrapper* data_wrapper) {
CassStatement* statement = cass_prepared_bind(select_prepared_);
cass_statement_bind_string(statement, 0,
cass_string_init(receiver_id.c_str()));
cass_statement_set_paging_size(statement, FLAGS_page_size);
CassFuture* future = cass_session_execute(session_, statement);
auto retrieve_cb = [](CassFuture* future, void* data) {
CassError rc = cass_future_error_code(future);
Wrapper* wrapper = (Wrapper*)data;
if (rc == CASS_OK) {
const CassResult* result = cass_future_get_result(future);
if (cass_result_row_count(result)) {
CassIterator* iterator = cass_iterator_from_result(result);
CassString cass_receiver, cass_time, cass_msg_id,
cass_group_id, cass_msg, cass_sender;
while (cass_iterator_next(iterator)) {
const CassRow* row = cass_iterator_get_row(iterator);
cass_value_get_string(cass_row_get_column(row, 0), &cass_receiver);
cass_value_get_string(cass_row_get_column(row, 1), &cass_time);
cass_value_get_string(cass_row_get_column(row, 2), &cass_msg_id);
cass_value_get_string(cass_row_get_column(row, 3), &cass_group_id);
cass_value_get_string(cass_row_get_column(row, 4), &cass_msg);
cass_value_get_string(cass_row_get_column(row, 5), &cass_sender);
std::string receiver(cass_receiver.data, cass_receiver.length);
std::string time(cass_time.data, cass_time.length);
std::string msg_id(cass_msg_id.data, cass_msg_id.length);
std::string group_id(cass_group_id.data, cass_group_id.length);
std::string msg(cass_msg.data, cass_msg.length);
std::string sender(cass_sender.data, cass_sender.length);
boost::shared_ptr<Message> message(new Message());
message->__set_receiver_id(receiver);
message->__set_timestamp(time);
message->__set_msg_id(msg_id);
message->__set_group_id(group_id);
message->__set_msg(msg);
message->__set_sender_id(sender);
wrapper->pmsgs->push_back(message);
}
cass_bool_t has_more_pages = cass_result_has_more_pages(result);
if (has_more_pages) {
cass_statement_set_paging_state(wrapper->statement, result);
(wrapper->func)();
} else {
cass_statement_free(wrapper->statement);
CassStatement* statement =
cass_prepared_bind(wrapper->this_obj->delete_prepared_);
cass_statement_bind_string(statement, 0, cass_receiver);
CassFuture* delete_future =
cass_session_execute(wrapper->this_obj->session_, statement);
cass_future_free(delete_future);
cass_statement_free(statement);
(wrapper->cob)(true, wrapper);
}
cass_iterator_free(iterator);
} else {
cass_statement_free(wrapper->statement);
(wrapper->cob)(true, wrapper);
}
cass_result_free(result);
} else {
cass_statement_free(wrapper->statement);
wrapper->this_obj->PrintError(future);
(wrapper->cob)(false, wrapper);
}
};
data_wrapper->this_obj = this;
data_wrapper->cob = cob;
data_wrapper->statement = statement;
data_wrapper->func = [=]() {
CassFuture* future = cass_session_execute(session_, statement);
cass_future_set_callback(future, retrieve_cb, data_wrapper);
cass_future_free(future);
};
cass_future_set_callback(future, retrieve_cb, data_wrapper);
cass_future_free(future);
}
static int
librdf_storage_cassandra_add_statements(librdf_storage* storage,
librdf_stream* statement_stream)
{
librdf_storage_cassandra_instance* context;
context = (librdf_storage_cassandra_instance*)storage->instance;
CassBatch* batch = 0;
const int batch_size = 10;
int rows = 0;
for(; !librdf_stream_end(statement_stream);
librdf_stream_next(statement_stream)) {
librdf_statement* statement;
librdf_node* context_node;
statement = librdf_stream_get_object(statement_stream);
context_node = librdf_stream_get_context2(statement_stream);
if(!statement) {
break;
}
char* s;
char* p;
char* o;
char* c;
statement_helper(storage, statement, context_node, &s, &p, &o, &c);
if (batch == 0)
batch = cass_batch_new(CASS_BATCH_TYPE_LOGGED);
char* query = "INSERT INTO rdf.spo (s, p, o) VALUES (?, ?, ?);";
CassStatement* stmt = cass_statement_new(query, 3);
cass_statement_bind_string(stmt, 0, s);
cass_statement_bind_string(stmt, 1, p);
cass_statement_bind_string(stmt, 2, o);
cass_batch_add_statement(batch, stmt);
cass_statement_free(stmt);
query = "INSERT INTO rdf.pos (s, p, o) VALUES (?, ?, ?);";
stmt = cass_statement_new(query, 3);
cass_statement_bind_string(stmt, 0, s);
cass_statement_bind_string(stmt, 1, p);
cass_statement_bind_string(stmt, 2, o);
cass_batch_add_statement(batch, stmt);
cass_statement_free(stmt);
query = "INSERT INTO rdf.osp (s, p, o) VALUES (?, ?, ?);";
stmt = cass_statement_new(query, 3);
cass_statement_bind_string(stmt, 0, s);
cass_statement_bind_string(stmt, 1, p);
cass_statement_bind_string(stmt, 2, o);
cass_batch_add_statement(batch, stmt);
cass_statement_free(stmt);
free(s);
free(p);
free(o);
if (++rows > batch_size) {
CassFuture* future = cass_session_execute_batch(context->session,
batch);
cass_batch_free(batch);
CassError rc = cass_future_error_code(future);
if (rc != CASS_OK) {
fprintf(stderr, "Cassandra: %s\n", cass_error_desc(rc));
const char* msg;
size_t msg_len;
cass_future_error_message(future, &msg, &msg_len);
fprintf(stderr, "Cassandra: %*s\n", msg_len, msg);
cass_future_free(future);
return -1;
}
cass_future_free(future);
batch = 0;
}
}
if (batch) {
CassFuture* future = cass_session_execute_batch(context->session,
batch);
cass_batch_free(batch);
CassError rc = cass_future_error_code(future);
if (rc != CASS_OK) {
fprintf(stderr, "Cassandra: %s\n", cass_error_desc(rc));
const char* msg;
size_t msg_len;
cass_future_error_message(future, &msg, &msg_len);
fprintf(stderr, "Cassandra: %*s\n", msg_len, msg);
cass_future_free(future);
return -1;
}
cass_future_free(future);
}
return 0;
}
int main(int argc, char* argv[]) {
/* Setup and connect to cluster */
CassFuture* connect_future = NULL;
CassCluster* cluster = cass_cluster_new();
CassSession* session = cass_session_new();
char* hosts = "127.0.0.1";
if (argc > 1) {
hosts = argv[1];
}
/* Add contact points */
cass_cluster_set_contact_points(cluster, hosts);
/* Provide the cluster object as configuration to connect the session */
connect_future = cass_session_connect(session, cluster);
if (cass_future_error_code(connect_future) == CASS_OK) {
CassFuture* close_future = NULL;
/* Build statement and execute query */
const char* query = "SELECT keyspace_name "
"FROM system.schema_keyspaces;";
CassStatement* statement = cass_statement_new(query, 0);
CassFuture* result_future = cass_session_execute(session, statement);
if (cass_future_error_code(result_future) == CASS_OK) {
/* Retrieve result set and iterate over the rows */
const CassResult* result = cass_future_get_result(result_future);
CassIterator* rows = cass_iterator_from_result(result);
while (cass_iterator_next(rows)) {
const CassRow* row = cass_iterator_get_row(rows);
const CassValue* value = cass_row_get_column_by_name(row, "keyspace_name");
const char* keyspace_name;
size_t keyspace_name_length;
cass_value_get_string(value, &keyspace_name, &keyspace_name_length);
printf("keyspace_name: '%.*s'\n", (int)keyspace_name_length,
keyspace_name);
}
cass_result_free(result);
cass_iterator_free(rows);
} else {
/* Handle error */
const char* message;
size_t message_length;
cass_future_error_message(result_future, &message, &message_length);
fprintf(stderr, "Unable to run query: '%.*s'\n", (int)message_length,
message);
}
cass_statement_free(statement);
cass_future_free(result_future);
/* Close the session */
close_future = cass_session_close(session);
cass_future_wait(close_future);
cass_future_free(close_future);
} else {
/* Handle error */
const char* message;
size_t message_length;
cass_future_error_message(connect_future, &message, &message_length);
fprintf(stderr, "Unable to connect: '%.*s'\n", (int)message_length,
message);
}
cass_future_free(connect_future);
cass_cluster_free(cluster);
cass_session_free(session);
return 0;
}
