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-rw-r--r--storage/cassandra/cassandra_se.cc863
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diff --git a/storage/cassandra/cassandra_se.cc b/storage/cassandra/cassandra_se.cc
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--- a/storage/cassandra/cassandra_se.cc
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@@ -1,863 +0,0 @@
-
-// Cassandra includes:
-#include <inttypes.h>
-#include <netinet/in.h>
-#include <sys/time.h>
-#include <stdio.h>
-#include <stdarg.h>
-
-#include "thrift/Thrift.h"
-#include "thrift/transport/TSocket.h"
-#include "thrift/transport/TTransport.h"
-#include "thrift/transport/TBufferTransports.h"
-#include "thrift/protocol/TProtocol.h"
-#include "thrift/protocol/TBinaryProtocol.h"
-#include "gen-cpp/Cassandra.h"
-// cassandra includes end
-
-#include "cassandra_se.h"
-
-struct st_mysql_lex_string
-{
- char *str;
- size_t length;
-};
-
-using namespace std;
-using namespace apache::thrift;
-using namespace apache::thrift::transport;
-using namespace apache::thrift::protocol;
-using namespace org::apache::cassandra;
-
-
-/*
- Implementation of connection to one Cassandra column family (ie., table)
-*/
-class Cassandra_se_impl: public Cassandra_se_interface
-{
- CassandraClient *cass; /* Connection to cassandra */
-
- std::string column_family;
- std::string keyspace;
-
- ConsistencyLevel::type write_consistency;
- ConsistencyLevel::type read_consistency;
-
- /* Connection data */
- std::string host;
- int port;
- /* How many times to retry an operation before giving up */
- int thrift_call_retries_to_do;
-
- bool inside_try_operation;
-
- /* DDL data */
- KsDef ks_def; /* KeySpace we're using (TODO: put this in table->share) */
- CfDef cf_def; /* Column family we're using (TODO: put in table->share)*/
- std::vector<ColumnDef>::iterator column_ddl_it;
-
- /* The list that was returned by the last key lookup */
- std::vector<ColumnOrSuperColumn> column_data_vec;
- std::vector<ColumnOrSuperColumn>::iterator column_data_it;
-
- /* Insert preparation */
- typedef std::map<std::string, std::vector<Mutation> > ColumnFamilyToMutation;
- typedef std::map<std::string, ColumnFamilyToMutation> KeyToCfMutationMap;
-
- KeyToCfMutationMap batch_mutation; /* Prepare operation here */
- int64_t insert_timestamp;
- std::vector<Mutation>* insert_list;
-
- /* Resultset we're reading */
- std::vector<KeySlice> key_slice_vec;
- std::vector<KeySlice>::iterator key_slice_it;
-
- std::string rowkey; /* key of the record we're returning now */
-
- SlicePredicate slice_pred;
- SliceRange slice_pred_sr;
- bool get_slices_returned_less;
- bool get_slice_found_rows;
-
- bool reconnect();
-public:
- Cassandra_se_impl() : cass(NULL),
- write_consistency(ConsistencyLevel::ONE),
- read_consistency(ConsistencyLevel::ONE),
- thrift_call_retries_to_do(1),
- inside_try_operation(false)
- {}
- virtual ~Cassandra_se_impl(){ delete cass; }
-
- /* Connection and DDL checks */
- bool connect(const char *host_arg, int port_arg, const char *keyspace);
- void set_column_family(const char *cfname) { column_family.assign(cfname); }
-
- bool setup_ddl_checks();
- void first_ddl_column();
- bool next_ddl_column(char **name, int *name_len, char **value, int *value_len);
- void get_rowkey_type(char **name, char **type);
- size_t get_ddl_size();
- const char* get_default_validator();
-
- /* Settings */
- void set_consistency_levels(unsigned long read_cons_level, unsigned long write_cons_level);
- virtual void set_n_retries(uint retries_arg) {
- thrift_call_retries_to_do= retries_arg;
- }
-
- /* Writes */
- void clear_insert_buffer();
- void start_row_insert(const char *key, int key_len);
- void add_insert_column(const char *name, int name_len,
- const char *value, int value_len);
- void add_insert_delete_column(const char *name, int name_len);
- void add_row_deletion(const char *key, int key_len,
- Column_name_enumerator *col_names,
- LEX_STRING *names, uint nnames);
-
- bool do_insert();
-
- /* Reads, point lookups */
- bool get_slice(char *key, size_t key_len, bool *found);
- bool get_next_read_column(char **name, int *name_len,
- char **value, int *value_len );
- void get_read_rowkey(char **value, int *value_len);
-
- /* Reads, multi-row scans */
-private:
- bool have_rowkey_to_skip;
- std::string rowkey_to_skip;
-
- bool get_range_slices_param_last_key_as_start_key;
-public:
- bool get_range_slices(bool last_key_as_start_key);
- void finish_reading_range_slices();
- bool get_next_range_slice_row(bool *eof);
-
- /* Setup that's necessary before a multi-row read. (todo: use it before point lookups, too) */
- void clear_read_columns();
- void clear_read_all_columns();
- void add_read_column(const char *name);
-
- /* Reads, MRR scans */
- void new_lookup_keys();
- int add_lookup_key(const char *key, size_t key_len);
- bool multiget_slice();
-
- bool get_next_multiget_row();
-
- bool truncate();
-
- bool remove_row();
-
-private:
- bool retryable_truncate();
- bool retryable_do_insert();
- bool retryable_remove_row();
- bool retryable_setup_ddl_checks();
- bool retryable_multiget_slice();
- bool retryable_get_range_slices();
- bool retryable_get_slice();
-
- std::vector<std::string> mrr_keys; /* can we use allocator to put these into MRR buffer? */
- std::map<std::string, std::vector<ColumnOrSuperColumn> > mrr_result;
- std::map<std::string, std::vector<ColumnOrSuperColumn> >::iterator mrr_result_it;
-
- /* Non-inherited utility functions: */
- int64_t get_i64_timestamp();
-
- typedef bool (Cassandra_se_impl::*retryable_func_t)();
- bool try_operation(retryable_func_t func);
-};
-
-
-/////////////////////////////////////////////////////////////////////////////
-// Connection and setup
-/////////////////////////////////////////////////////////////////////////////
-Cassandra_se_interface *create_cassandra_se()
-{
- return new Cassandra_se_impl;
-}
-
-
-bool Cassandra_se_impl::connect(const char *host_arg, int port_arg, const char *keyspace_arg)
-{
- keyspace.assign(keyspace_arg);
- host.assign(host_arg);
- port= port_arg;
- return reconnect();
-}
-
-
-bool Cassandra_se_impl::reconnect()
-{
-
- delete cass;
- cass= NULL;
-
- bool res= true;
- try {
- boost::shared_ptr<TTransport> socket =
- boost::shared_ptr<TSocket>(new TSocket(host.c_str(), port));
- boost::shared_ptr<TTransport> tr =
- boost::shared_ptr<TFramedTransport>(new TFramedTransport (socket));
- boost::shared_ptr<TProtocol> p =
- boost::shared_ptr<TBinaryProtocol>(new TBinaryProtocol(tr));
-
- cass= new CassandraClient(p);
- tr->open();
- cass->set_keyspace(keyspace.c_str());
-
- res= false; // success
- }catch(TTransportException te){
- print_error("%s [%d]", te.what(), te.getType());
- }catch(InvalidRequestException ire){
- print_error("%s [%s]", ire.what(), ire.why.c_str());
- }catch(NotFoundException nfe){
- print_error("%s", nfe.what());
- }catch(TException e){
- print_error("Thrift exception: %s", e.what());
- }catch (...) {
- print_error("Unknown exception");
- }
-
- if (!res && setup_ddl_checks())
- res= true;
- return res;
-}
-
-
-void Cassandra_se_impl::set_consistency_levels(unsigned long read_cons_level,
- unsigned long write_cons_level)
-{
- write_consistency= (ConsistencyLevel::type)(write_cons_level + 1);
- read_consistency= (ConsistencyLevel::type)(read_cons_level + 1);
-}
-
-
-bool Cassandra_se_impl::retryable_setup_ddl_checks()
-{
- try {
-
- cass->describe_keyspace(ks_def, keyspace);
-
- } catch (NotFoundException nfe) {
- print_error("keyspace `%s` not found: %s", keyspace.c_str(), nfe.what());
- return true;
- }
-
- std::vector<CfDef>::iterator it;
- for (it= ks_def.cf_defs.begin(); it < ks_def.cf_defs.end(); it++)
- {
- cf_def= *it;
- if (!cf_def.name.compare(column_family))
- return false;
- }
-
- print_error("Column family %s not found in keyspace %s",
- column_family.c_str(),
- keyspace.c_str());
- return true;
-}
-
-bool Cassandra_se_impl::setup_ddl_checks()
-{
- return try_operation(&Cassandra_se_impl::retryable_setup_ddl_checks);
-}
-
-
-void Cassandra_se_impl::first_ddl_column()
-{
- column_ddl_it= cf_def.column_metadata.begin();
-}
-
-
-bool Cassandra_se_impl::next_ddl_column(char **name, int *name_len,
- char **type, int *type_len)
-{
- if (column_ddl_it == cf_def.column_metadata.end())
- return true;
-
- *name= (char*)(*column_ddl_it).name.c_str();
- *name_len= (*column_ddl_it).name.length();
-
- *type= (char*)(*column_ddl_it).validation_class.c_str();
- *type_len= (*column_ddl_it).validation_class.length();
-
- column_ddl_it++;
- return false;
-}
-
-
-void Cassandra_se_impl::get_rowkey_type(char **name, char **type)
-{
- if (cf_def.__isset.key_validation_class)
- *type= (char*)cf_def.key_validation_class.c_str();
- else
- *type= NULL;
-
- if (cf_def.__isset.key_alias)
- *name= (char*)cf_def.key_alias.c_str();
- else
- *name= NULL;
-}
-
-size_t Cassandra_se_impl::get_ddl_size()
-{
- return cf_def.column_metadata.size();
-}
-
-const char* Cassandra_se_impl::get_default_validator()
-{
- return cf_def.default_validation_class.c_str();
-}
-
-
-/////////////////////////////////////////////////////////////////////////////
-// Data writes
-/////////////////////////////////////////////////////////////////////////////
-int64_t Cassandra_se_impl::get_i64_timestamp()
-{
- struct timeval td;
- gettimeofday(&td, NULL);
- int64_t ms = td.tv_sec;
- ms = ms * 1000;
- int64_t usec = td.tv_usec;
- usec = usec / 1000;
- ms += usec;
-
- return ms;
-}
-
-
-void Cassandra_se_impl::clear_insert_buffer()
-{
- batch_mutation.clear();
-}
-
-
-void Cassandra_se_impl::start_row_insert(const char *key, int key_len)
-{
- std::string key_to_insert;
- key_to_insert.assign(key, key_len);
- batch_mutation[key_to_insert]= ColumnFamilyToMutation();
- ColumnFamilyToMutation& cf_mut= batch_mutation[key_to_insert];
-
- cf_mut[column_family]= std::vector<Mutation>();
- insert_list= &cf_mut[column_family];
-
- insert_timestamp= get_i64_timestamp();
-}
-
-
-void Cassandra_se_impl::add_row_deletion(const char *key, int key_len,
- Column_name_enumerator *col_names,
- LEX_STRING *names, uint nnames)
-{
- std::string key_to_delete;
- key_to_delete.assign(key, key_len);
-
- batch_mutation[key_to_delete]= ColumnFamilyToMutation();
- ColumnFamilyToMutation& cf_mut= batch_mutation[key_to_delete];
-
- cf_mut[column_family]= std::vector<Mutation>();
- std::vector<Mutation> &mutation_list= cf_mut[column_family];
-
- Mutation mut;
- mut.__isset.deletion= true;
- mut.deletion.__isset.timestamp= true;
- mut.deletion.timestamp= get_i64_timestamp();
- mut.deletion.__isset.predicate= true;
-
- /*
- Attempting to delete columns with SliceRange causes exception with message
- "Deletion does not yet support SliceRange predicates".
-
- Delete all columns individually.
- */
- SlicePredicate slice_pred;
- slice_pred.__isset.column_names= true;
- const char *col_name;
- while ((col_name= col_names->get_next_name()))
- slice_pred.column_names.push_back(std::string(col_name));
- for (uint i= 0; i < nnames; i++)
- slice_pred.column_names.push_back(std::string(names[i].str,
- names[i].length));
-
- mut.deletion.predicate= slice_pred;
-
- mutation_list.push_back(mut);
-}
-
-
-void Cassandra_se_impl::add_insert_column(const char *name,
- int name_len,
- const char *value,
- int value_len)
-{
- Mutation mut;
- mut.__isset.column_or_supercolumn= true;
- mut.column_or_supercolumn.__isset.column= true;
-
- Column& col=mut.column_or_supercolumn.column;
- if (name_len)
- col.name.assign(name, name_len);
- else
- col.name.assign(name);
- col.value.assign(value, value_len);
- col.timestamp= insert_timestamp;
- col.__isset.value= true;
- col.__isset.timestamp= true;
- insert_list->push_back(mut);
-}
-
-void Cassandra_se_impl::add_insert_delete_column(const char *name,
- int name_len)
-{
- Mutation mut;
- mut.__isset.deletion= true;
- mut.deletion.__isset.timestamp= true;
- mut.deletion.timestamp= insert_timestamp;
- mut.deletion.__isset.predicate= true;
-
- SlicePredicate slice_pred;
- slice_pred.__isset.column_names= true;
- slice_pred.column_names.push_back(std::string(name, name_len));
- mut.deletion.predicate= slice_pred;
-
- insert_list->push_back(mut);
-}
-
-
-bool Cassandra_se_impl::retryable_do_insert()
-{
- cass->batch_mutate(batch_mutation, write_consistency);
-
- cassandra_counters.row_inserts+= batch_mutation.size();
- cassandra_counters.row_insert_batches++;
-
- clear_insert_buffer();
- return 0;
-}
-
-
-bool Cassandra_se_impl::do_insert()
-{
- /*
- zero-size mutations are allowed by Cassandra's batch_mutate but lets not
- do them (we may attempt to do it if there is a bulk insert that stores
- exactly @@cassandra_insert_batch_size*n elements.
- */
- if (batch_mutation.empty())
- return false;
-
- return try_operation(&Cassandra_se_impl::retryable_do_insert);
-}
-
-
-/////////////////////////////////////////////////////////////////////////////
-// Reading data
-/////////////////////////////////////////////////////////////////////////////
-
-/*
- Make one key lookup. If the record is found, the result is stored locally and
- the caller should iterate over it.
-*/
-
-bool Cassandra_se_impl::get_slice(char *key, size_t key_len, bool *found)
-{
- bool res;
- rowkey.assign(key, key_len);
-
- if (!(res= try_operation(&Cassandra_se_impl::retryable_get_slice)))
- *found= get_slice_found_rows;
- return res;
-}
-
-
-bool Cassandra_se_impl::retryable_get_slice()
-{
- ColumnParent cparent;
- cparent.column_family= column_family;
-
- SlicePredicate slice_pred;
- SliceRange sr;
- sr.start = "";
- sr.finish = "";
- slice_pred.__set_slice_range(sr);
-
- cass->get_slice(column_data_vec, rowkey, cparent, slice_pred,
- read_consistency);
-
- if (column_data_vec.size() == 0)
- {
- /*
- No columns found. Cassandra doesn't allow records without any column =>
- this means the seach key doesn't exist
- */
- get_slice_found_rows= false;
- return false;
- }
- get_slice_found_rows= true;
-
- column_data_it= column_data_vec.begin();
- return false;
-}
-
-
-bool Cassandra_se_impl::get_next_read_column(char **name, int *name_len,
- char **value, int *value_len)
-{
- bool use_counter=false;
- while (1)
- {
- if (column_data_it == column_data_vec.end())
- return true;
-
- if ((*column_data_it).__isset.column)
- break; /* Ok it's a real column. Should be always the case. */
-
- if ((*column_data_it).__isset.counter_column)
- {
- use_counter= true;
- break;
- }
-
- column_data_it++;
- }
-
- ColumnOrSuperColumn& cs= *column_data_it;
- if (use_counter)
- {
- *name_len= cs.counter_column.name.size();
- *name= (char*)cs.counter_column.name.c_str();
- *value= (char*)&cs.counter_column.value;
- *value_len= sizeof(cs.counter_column.value);
- }
- else
- {
- *name_len= cs.column.name.size();
- *name= (char*)cs.column.name.c_str();
- *value= (char*)cs.column.value.c_str();
- *value_len= cs.column.value.length();
- }
-
- column_data_it++;
- return false;
-}
-
-
-/* Return the rowkey for the record that was read */
-
-void Cassandra_se_impl::get_read_rowkey(char **value, int *value_len)
-{
- *value= (char*)rowkey.c_str();
- *value_len= rowkey.length();
-}
-
-
-bool Cassandra_se_impl::get_range_slices(bool last_key_as_start_key)
-{
- get_range_slices_param_last_key_as_start_key= last_key_as_start_key;
-
- return try_operation(&Cassandra_se_impl::retryable_get_range_slices);
-}
-
-
-bool Cassandra_se_impl::retryable_get_range_slices()
-{
- bool last_key_as_start_key= get_range_slices_param_last_key_as_start_key;
-
- ColumnParent cparent;
- cparent.column_family= column_family;
-
- /* SlicePredicate can be used to limit columns we will retrieve */
-
- KeyRange key_range;
- key_range.__isset.start_key= true;
- key_range.__isset.end_key= true;
-
- if (last_key_as_start_key)
- {
- key_range.start_key= rowkey;
-
- have_rowkey_to_skip= true;
- rowkey_to_skip= rowkey;
- }
- else
- {
- have_rowkey_to_skip= false;
- key_range.start_key.assign("", 0);
- }
-
- key_range.end_key.assign("", 0);
- key_range.count= read_batch_size;
-
- cass->get_range_slices(key_slice_vec, cparent, slice_pred, key_range,
- read_consistency);
-
- if (key_slice_vec.size() < (uint)read_batch_size)
- get_slices_returned_less= true;
- else
- get_slices_returned_less= false;
-
- key_slice_it= key_slice_vec.begin();
- return false;
-}
-
-
-/* Switch to next row. This may produce an error */
-bool Cassandra_se_impl::get_next_range_slice_row(bool *eof)
-{
-restart:
- if (key_slice_it == key_slice_vec.end())
- {
- if (get_slices_returned_less)
- {
- *eof= true;
- return false;
- }
-
- /*
- We have read through all columns in this batch. Try getting the next
- batch.
- */
- if (get_range_slices(true))
- return true;
-
- if (key_slice_vec.empty())
- {
- *eof= true;
- return false;
- }
- }
-
- /*
- (1) - skip the last row that we have read in the previous batch.
- (2) - Rows that were deleted show up as rows without any columns. Skip
- them, like CQL does.
- */
- if ((have_rowkey_to_skip && !rowkey_to_skip.compare(key_slice_it->key)) || // (1)
- key_slice_it->columns.size() == 0) // (2)
- {
- key_slice_it++;
- goto restart;
- }
-
- *eof= false;
- column_data_vec= key_slice_it->columns;
- rowkey= key_slice_it->key;
- column_data_it= column_data_vec.begin();
- key_slice_it++;
- return false;
-}
-
-
-void Cassandra_se_impl::finish_reading_range_slices()
-{
- key_slice_vec.clear();
-}
-
-
-void Cassandra_se_impl::clear_read_columns()
-{
- slice_pred.column_names.clear();
-}
-
-void Cassandra_se_impl::clear_read_all_columns()
-{
- slice_pred_sr.start = "";
- slice_pred_sr.finish = "";
- slice_pred.__set_slice_range(slice_pred_sr);
-}
-
-
-void Cassandra_se_impl::add_read_column(const char *name_arg)
-{
- std::string name(name_arg);
- slice_pred.__isset.column_names= true;
- slice_pred.column_names.push_back(name);
-}
-
-
-bool Cassandra_se_impl::truncate()
-{
- return try_operation(&Cassandra_se_impl::retryable_truncate);
-}
-
-
-bool Cassandra_se_impl::retryable_truncate()
-{
- cass->truncate(column_family);
- return 0;
-}
-
-
-bool Cassandra_se_impl::remove_row()
-{
- return try_operation(&Cassandra_se_impl::retryable_remove_row);
-}
-
-
-bool Cassandra_se_impl::retryable_remove_row()
-{
- ColumnPath column_path;
- column_path.column_family= column_family;
- cass->remove(rowkey, column_path, get_i64_timestamp(), write_consistency);
- return 0;
-}
-
-/*
- Try calling a function, catching possible Cassandra errors, and re-trying
- for "transient" errors.
-*/
-bool Cassandra_se_impl::try_operation(retryable_func_t func_to_call)
-{
- bool res;
- int n_attempts= thrift_call_retries_to_do;
-
- bool was_inside_try_operation= inside_try_operation;
- inside_try_operation= true;
-
- do
- {
- res= true;
-
- try {
-
- if ((res= (this->*func_to_call)()))
- {
- /*
- The function call was made successfully (without timeouts, etc),
- but something inside it returned 'true'.
- This is supposedly a failure (or "not found" or other negative
- result). We need to return this to the caller.
- */
- n_attempts= 0;
- }
-
- } catch (InvalidRequestException ire) {
- n_attempts= 0; /* there is no point in retrying this operation */
- print_error("%s [%s]", ire.what(), ire.why.c_str());
- } catch (UnavailableException ue) {
- cassandra_counters.unavailable_exceptions++;
- if (!--n_attempts)
- print_error("UnavailableException: %s", ue.what());
- } catch (TimedOutException te) {
- /*
- Note: this is a timeout generated *inside Cassandra cluster*.
- Connection between us and the cluster is ok, but something went wrong
- within the cluster.
- */
- cassandra_counters.timeout_exceptions++;
- if (!--n_attempts)
- print_error("TimedOutException: %s", te.what());
- } catch (TTransportException tte) {
- /* Something went wrong in communication between us and Cassandra */
- cassandra_counters.network_exceptions++;
-
- switch (tte.getType())
- {
- case TTransportException::NOT_OPEN:
- case TTransportException::TIMED_OUT:
- case TTransportException::END_OF_FILE:
- case TTransportException::INTERRUPTED:
- {
- if (!was_inside_try_operation && reconnect())
- {
- /* Failed to reconnect, no point to retry the operation */
- n_attempts= 0;
- print_error("%s", tte.what());
- }
- else
- {
- n_attempts--;
- }
- break;
- }
- default:
- {
- /*
- We assume it doesn't make sense to retry for
- unknown kinds of TTransportException-s
- */
- n_attempts= 0;
- print_error("%s", tte.what());
- }
- }
- }catch(TException e){
- /* todo: we may use retry for certain kinds of Thrift errors */
- n_attempts= 0;
- print_error("Thrift exception: %s", e.what());
- } catch (...) {
- n_attempts= 0; /* Don't retry */
- print_error("Unknown exception");
- }
-
- } while (res && n_attempts > 0);
-
- inside_try_operation= was_inside_try_operation;
- return res;
-}
-
-/////////////////////////////////////////////////////////////////////////////
-// MRR reads
-/////////////////////////////////////////////////////////////////////////////
-
-void Cassandra_se_impl::new_lookup_keys()
-{
- mrr_keys.clear();
-}
-
-
-int Cassandra_se_impl::add_lookup_key(const char *key, size_t key_len)
-{
- mrr_keys.push_back(std::string(key, key_len));
- return mrr_keys.size();
-}
-
-bool Cassandra_se_impl::multiget_slice()
-{
- return try_operation(&Cassandra_se_impl::retryable_multiget_slice);
-}
-
-
-bool Cassandra_se_impl::retryable_multiget_slice()
-{
- ColumnParent cparent;
- cparent.column_family= column_family;
-
- SlicePredicate slice_pred;
- SliceRange sr;
- sr.start = "";
- sr.finish = "";
- slice_pred.__set_slice_range(sr);
-
- cassandra_counters.multiget_reads++;
- cassandra_counters.multiget_keys_scanned += mrr_keys.size();
- cass->multiget_slice(mrr_result, mrr_keys, cparent, slice_pred,
- read_consistency);
-
- cassandra_counters.multiget_rows_read += mrr_result.size();
- mrr_result_it= mrr_result.begin();
-
- return false;
-}
-
-
-bool Cassandra_se_impl::get_next_multiget_row()
-{
- if (mrr_result_it == mrr_result.end())
- return true; /* EOF */
-
- column_data_vec= mrr_result_it->second;
- rowkey= mrr_result_it->first;
-
- column_data_it= column_data_vec.begin();
- mrr_result_it++;
- return false;
-}
-
-
-
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