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dcdb
Commit 70e07df2 authored by Alessio Netti's avatar Alessio Netti
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libDCDB: paging for SensorDataStore and SensorConfig queries

parent 39db19f7
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Showing with 240 additions and 194 deletions
lib/include_internal/dcdbglobals.h
View file @ 70e07df2
......@@ -44,6 +44,7 @@
#define CF_SENSORDATA "sensordata"
#define SENSORDATA_GC_GRACE_SECONDS "600"
#define SENSORDATA_COMPACTION "{'class' : 'TimeWindowCompactionStrategy', 'compaction_window_unit' : 'DAYS', 'compaction_window_size' : 1 }"
#define PAGING_SIZE 50000
#define CONFIG_KEYSPACE_NAME KEYSPACE_NAME "_config"
#define CF_PUBLISHEDSENSORS "publishedsensors"
......
lib/src/connection.cpp
View file @ 70e07df2
......@@ -372,8 +372,7 @@ bool ConnectionImpl::connect() {
cass_cluster_set_num_threads_io(cluster, numThreadsIo);
cass_cluster_set_queue_size_io(cluster, queueSizeIo);
cass_cluster_set_core_connections_per_host(cluster, coreConnPerHost);
//TODO: avoid this and use actual paging in queries
cass_cluster_set_request_timeout(cluster, 300000);
cass_cluster_set_request_timeout(cluster, 60000);
/* Force protcol version to 1 */
cass_cluster_set_protocol_version(cluster, 1);
......
lib/src/sensorconfig.cpp
View file @ 70e07df2
This diff is collapsed.
lib/src/sensordatastore.cpp
View file @ 70e07df2
......@@ -262,50 +262,62 @@ void SensorDataStoreImpl::query(std::list<SensorDataStoreReading>& result, Senso
#endif
statement = cass_prepared_bind(prepared);
cass_statement_set_paging_size(statement, PAGING_SIZE);
cass_statement_bind_string(statement, 0, sid.getId().c_str());
cass_statement_bind_int16(statement, 1, sid.getRsvd());
cass_statement_bind_int64(statement, 2, start.getRaw());
cass_statement_bind_int64(statement, 3, end.getRaw());
future = cass_session_execute(session, statement);
cass_future_wait(future);
bool morePages = false;
do {
future = cass_session_execute(session, statement);
cass_future_wait(future);
if (cass_future_error_code(future) == CASS_OK) {
const CassResult* cresult = cass_future_get_result(future);
CassIterator* rows = cass_iterator_from_result(cresult);
if (cass_future_error_code(future) == CASS_OK) {
const CassResult *cresult = cass_future_get_result(future);
CassIterator *rows = cass_iterator_from_result(cresult);
SensorDataStoreReading entry;
SensorDataStoreReading entry;
while (cass_iterator_next(rows)) {
const CassRow* row = cass_iterator_get_row(rows);
while (cass_iterator_next(rows)) {
const CassRow *row = cass_iterator_get_row(rows);
cass_int64_t ts, value;
cass_value_get_int64(cass_row_get_column_by_name(row, "ts"), &ts);
cass_value_get_int64(cass_row_get_column_by_name(row, "value"), &value);
cass_int64_t ts, value;
cass_value_get_int64(cass_row_get_column_by_name(row, "ts"), &ts);
cass_value_get_int64(cass_row_get_column_by_name(row, "value"), &value);
entry.sensorId = sid;
entry.timeStamp = (uint64_t)ts;
entry.value = (int64_t)value;
entry.sensorId = sid;
entry.timeStamp = (uint64_t) ts;
entry.value = (int64_t) value;
result.push_back(entry);
result.push_back(entry);
#if 0
if (localtime) {
t.convertToLocal();
}
if (raw) {
std::cout << sensorName << "," << std::dec << t.getRaw() << "," << std::dec << value << std::endl;
}
else {
std::cout << sensorName << "," << t.getString() << "," << std::dec << value << std::endl;
}
if (localtime) {
t.convertToLocal();
}
if (raw) {
std::cout << sensorName << "," << std::dec << t.getRaw() << "," << std::dec << value << std::endl;
}
else {
std::cout << sensorName << "," << t.getString() << "," << std::dec << value << std::endl;
}
#endif
}
if((morePages = cass_result_has_more_pages(cresult)))
cass_statement_set_paging_state(statement, cresult);
cass_iterator_free(rows);
cass_result_free(cresult);
} else {
morePages = false;
}
cass_iterator_free(rows);
cass_result_free(cresult);
}
cass_future_free(future);
}
while(morePages);
cass_statement_free(statement);
cass_future_free(future);
cass_prepared_free(prepared);
}
......@@ -360,55 +372,67 @@ void SensorDataStoreImpl::query(std::list<SensorDataStoreReading>& result, std::
}
statement = cass_prepared_bind(prepared);
cass_statement_set_paging_size(statement, -1);
cass_statement_set_paging_size(statement, PAGING_SIZE);
cass_statement_bind_collection(statement, 0, cassList);
cass_statement_bind_int16(statement, 1, sids.front().getRsvd());
cass_statement_bind_int64(statement, 2, start.getRaw());
cass_statement_bind_int64(statement, 3, end.getRaw());
future = cass_session_execute(session, statement);
cass_future_wait(future);
if (cass_future_error_code(future) == CASS_OK) {
const CassResult *cresult = cass_future_get_result(future);
CassIterator *rows = cass_iterator_from_result(cresult);
SensorDataStoreReading entry;
cass_int64_t ts, value;
const char *name;
size_t name_len;
while (cass_iterator_next(rows)) {
const CassRow *row = cass_iterator_get_row(rows);
cass_value_get_int64(cass_row_get_column_by_name(row, "ts"), &ts);
cass_value_get_int64(cass_row_get_column_by_name(row, "value"), &value);
entry.timeStamp = (uint64_t) ts;
entry.value = (int64_t) value;
if(storeSids) {
cass_value_get_string(cass_row_get_column_by_name(row, "sid"), &name, &name_len);
entry.sensorId = SensorId(std::string(name, name_len));
}
result.push_back(entry);
bool morePages = false;
do {
future = cass_session_execute(session, statement);
cass_future_wait(future);
if (cass_future_error_code(future) == CASS_OK) {
const CassResult *cresult = cass_future_get_result(future);
CassIterator *rows = cass_iterator_from_result(cresult);
SensorDataStoreReading entry;
cass_int64_t ts, value;
const char *name;
size_t name_len;
while (cass_iterator_next(rows)) {
const CassRow *row = cass_iterator_get_row(rows);
cass_value_get_int64(cass_row_get_column_by_name(row, "ts"), &ts);
cass_value_get_int64(cass_row_get_column_by_name(row, "value"), &value);
entry.timeStamp = (uint64_t) ts;
entry.value = (int64_t) value;
if(storeSids) {
cass_value_get_string(cass_row_get_column_by_name(row, "sid"), &name, &name_len);
entry.sensorId = SensorId(std::string(name, name_len));
}
result.push_back(entry);
#if 0
if (localtime) {
t.convertToLocal();
}
if (raw) {
std::cout << sensorName << "," << std::dec << t.getRaw() << "," << std::dec << value << std::endl;
}
else {
std::cout << sensorName << "," << t.getString() << "," << std::dec << value << std::endl;
}
if (localtime) {
t.convertToLocal();
}
if (raw) {
std::cout << sensorName << "," << std::dec << t.getRaw() << "," << std::dec << value << std::endl;
}
else {
std::cout << sensorName << "," << t.getString() << "," << std::dec << value << std::endl;
}
#endif
}
if((morePages = cass_result_has_more_pages(cresult)))
cass_statement_set_paging_state(statement, cresult);
cass_iterator_free(rows);
cass_result_free(cresult);
} else {
morePages = false;
}
cass_iterator_free(rows);
cass_result_free(cresult);
cass_future_free(future);
}
while(morePages);
cass_statement_free(statement);
cass_future_free(future);
cass_collection_free(cassList);
}
......
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