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/*
* Copyright (c) 2012, 2014, Oracle and/or its affiliates. All rights reserved.
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License as
* published by the Free Software Foundation; version 2 of the
* License.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
* 02110-1301 USA
*/
#include <sqlite/execute.hpp>
#include <sqlite/query.hpp>
#include <sqlite/database_exception.hpp>
#include <glib.h>
#include "autocomplete_object_name_cache.h"
#include "base/string_utilities.h"
#include "base/log.h"
#include "base/file_utilities.h"
#include "base/sqlstring.h"
#include "grt/common.h"
#include "sqlide_generics.h"
using namespace bec;
DEFAULT_LOG_DOMAIN("AutoCCache");
// What can trigger a hard refresh (fetch data from server) of the cache:
// - first time a soft refresh is requested in the session (indirectly from the get_matching_* methods)
// - explicit hard refresh from frontend (ie, refresh schema tree)
//
//
// Editor --> AutoCompletionEngine --(object names)--> AutoCompleteCache --> server
// --> cache <-- LiveSchemaTree
//
//--------------------------------------------------------------------------------------------------
AutoCompleteCache::AutoCompleteCache(const std::string &connection_id,
boost::function<base::RecMutexLock (sql::Dbc_connection_handler::Ref &)> get_connection,
const std::string &cache_dir, boost::function<void (bool)> feedback)
: _refresh_thread(0), _cache_working(1), _connection_id(connection_id), _get_connection(get_connection), _schema_list_fetched(false), _shutdown(false)
{
_feedback = feedback;
_sqconn = new sqlite::connection(make_path(cache_dir, _connection_id)+".cache");
sqlite::execute(*_sqconn, "PRAGMA temp_store=MEMORY", true);
sqlite::execute(*_sqconn, "PRAGMA synchronous=NORMAL", true);
log_debug2("Using autocompletion cache file %s\n", (make_path(cache_dir, _connection_id)+".cache").c_str());
// check if the DB is already initialized
sqlite::query q(*_sqconn, "select name from sqlite_master where type='table'");
int found = 0;
if (q.emit())
{
boost::shared_ptr<sqlite::result> res(q.get_result());
do
{
std::string name = res->get_string(0);
if (name == "tables" || name == "schemas" || name == "routines" || name == "columns" || name == "meta")
found++;
}
while (res->next_row());
}
if (found == 0)
{
log_debug3("Initializing cache\n");
init_db();
}
else if (found != 5)
{
log_warning("Unexpected number of tables found in cache (%i). Recreating the cache...\n", found);
delete _sqconn;
base::remove(make_path(cache_dir, _connection_id)+".cache");
_sqconn = new sqlite::connection(make_path(cache_dir, _connection_id)+".cache");
sqlite::execute(*_sqconn, "PRAGMA temp_store=MEMORY", true);
sqlite::execute(*_sqconn, "PRAGMA synchronous=NORMAL", true);
init_db();
}
}
//--------------------------------------------------------------------------------------------------
void AutoCompleteCache::shutdown()
{
base::RecMutexLock sd_lock(_shutdown_mutex);
_shutdown = true;
{
base::RecMutexLock lock(_pending_mutex);
_pending_refresh_schema.clear();
_feedback = NULL;
}
if (_refresh_thread)
{
log_debug2("Waiting for worker thread to finish...\n");
g_thread_join(_refresh_thread);
_refresh_thread = NULL;
log_debug2("Worker thread finished.\n");
}
}
//--------------------------------------------------------------------------------------------------
AutoCompleteCache::~AutoCompleteCache()
{
g_assert(_shutdown);
delete _sqconn;
}
//--------------------------------------------------------------------------------------------------
std::vector<std::string> AutoCompleteCache::get_matching_schema_names(const std::string &prefix)
{
// schedule a fetch in case its needed
refresh_schema_list_cache_if_needed();
if (!_shutdown)
{
// Ensures shutdown is not done while processing
base::RecMutexLock sd_lock(_shutdown_mutex);
base::RecMutexLock lock(_sqconn_mutex);
sqlite::query q(*_sqconn, "SELECT name FROM schemas WHERE name LIKE ? ESCAPE '\\'");
q.bind(1, base::escape_sql_string(prefix, true) + "%");
if (q.emit())
{
std::vector<std::string> items;
boost::shared_ptr<sqlite::result> matches(q.get_result());
bool fetch_ongoing = false;
do
{
std::string name = matches->get_string(0);
if (name.empty()) // entry with empty name means a fetch is underway
{
fetch_ongoing = true;
break;
}
items.push_back(name);
}
while (matches->next_row());
if (!fetch_ongoing)
return items;
log_debug3("get_matching_schema_names(%s) returning empty list because fetch is still ongoing", prefix.c_str());
}
}
return std::vector<std::string>();
}
std::vector<std::string> AutoCompleteCache::get_matching_table_names(const std::string &schema, const std::string &prefix)
{
// schedule a fetch in case its needed
refresh_schema_cache_if_needed(schema);
if (!_shutdown)
{
// Ensures shutdown is not done while processing
base::RecMutexLock sd_lock(_shutdown_mutex);
base::RecMutexLock lock(_sqconn_mutex);
sqlite::query q(*_sqconn, "SELECT name FROM tables WHERE schema LIKE ? ESCAPE '\\' AND name LIKE ? ESCAPE '\\'");
q.bind(1, schema.size() == 0 ? "%" : base::escape_sql_string(schema, true));
q.bind(2, base::escape_sql_string(prefix, true) + "%");
if (q.emit())
{
std::vector<std::string> items;
boost::shared_ptr<sqlite::result> matches(q.get_result());
bool fetch_ongoing = false;
do
{
std::string name = matches->get_string(0);
if (name.empty()) // entry with empty name means a fetch is underway
{
fetch_ongoing = true;
break;
}
items.push_back(name);
}
while (matches->next_row());
if (!fetch_ongoing)
return items;
}
}
// this never got refreshed, but a fetch request must be ongoing.. we can wait and block or return an empty list
// if (_block_on_fetches)
return std::vector<std::string>();
}
std::vector<std::string> AutoCompleteCache::get_matching_column_names(const std::string &schema, const std::string &table, const std::string &prefix)
{
// schedule a fetch in case its needed
refresh_schema_cache_if_needed(schema);
if (!_shutdown)
{
// Ensures shutdown is not done while processing
base::RecMutexLock sd_lock(_shutdown_mutex);
base::RecMutexLock lock(_sqconn_mutex);
sqlite::query q(*_sqconn, "SELECT name FROM columns WHERE schema LIKE ? ESCAPE '\\' "
"AND tabl LIKE ? ESCAPE '\\' AND name LIKE ? ESCAPE '\\'");
q.bind(1, schema.size() == 0 ? "%" : base::escape_sql_string(schema, true));
q.bind(2, table.size() == 0 ? "%" : base::escape_sql_string(table, true));
q.bind(3, base::escape_sql_string(prefix, true) + "%");
if (q.emit())
{
std::vector<std::string> items;
boost::shared_ptr<sqlite::result> matches(q.get_result());
bool fetch_ongoing = false;
do
{
std::string name = matches->get_string(0);
if (name.empty()) // entry with empty name means a fetch is underway
{
fetch_ongoing = true;
break;
}
items.push_back(name);
}
while (matches->next_row());
if (!fetch_ongoing)
return items;
}
}
// this never got refreshed, but a fetch request must be ongoing.. we can wait and block or return an empty list
// if (_block_on_fetches)
return std::vector<std::string>();
}
std::vector<std::string> AutoCompleteCache::get_matching_procedure_names(const std::string &schema, const std::string &prefix)
{
// schedule a fetch in case its needed
refresh_schema_cache_if_needed(schema);
if (!_shutdown)
{
// Ensures shutdown is not done while processing
base::RecMutexLock sd_lock(_shutdown_mutex);
base::RecMutexLock lock(_sqconn_mutex);
sqlite::query q(*_sqconn, "SELECT name FROM routines WHERE schema LIKE ? ESCAPE '\\' "
"AND name LIKE ? ESCAPE '\\' AND is_function=0");
q.bind(1, schema.size() == 0 ? "%" : base::escape_sql_string(schema, true));
q.bind(2, base::escape_sql_string(prefix, true) + "%");
if (q.emit())
{
std::vector<std::string> items;
boost::shared_ptr<sqlite::result> matches(q.get_result());
bool fetch_ongoing = false;
do
{
std::string name = matches->get_string(0);
if (name.empty()) // entry with empty name means a fetch is underway
{
fetch_ongoing = true;
break;
}
items.push_back(name);
}
while (matches->next_row());
if (!fetch_ongoing)
return items;
}
}
// this never got refreshed, but a fetch request must be ongoing.. we can wait and block or return an empty list
// if (_block_on_fetches)
return std::vector<std::string>();
}
std::vector<std::string> AutoCompleteCache::get_matching_function_names(const std::string &schema, const std::string &prefix)
{
// schedule a fetch in case its needed
refresh_schema_cache_if_needed(schema);
if (!_shutdown)
{
// Ensures shutdown is not done while processing
base::RecMutexLock sd_lock(_shutdown_mutex);
base::RecMutexLock lock(_sqconn_mutex);
sqlite::query q(*_sqconn, "SELECT name FROM routines WHERE schema LIKE ? ESCAPE '\\' "
"AND name LIKE ? ESCAPE '\\' AND is_function=1");
q.bind(1, schema.size() == 0 ? "%" : base::escape_sql_string(schema, true));
q.bind(2, base::escape_sql_string(prefix, true) + "%");
if (q.emit())
{
std::vector<std::string> items;
boost::shared_ptr<sqlite::result> matches(q.get_result());
bool fetch_ongoing = false;
do
{
std::string name = matches->get_string(0);
if (name.empty()) // entry with empty name means a fetch is underway
{
fetch_ongoing = true;
break;
}
items.push_back(name);
}
while (matches->next_row());
if (!fetch_ongoing)
return items;
}
}
// this never got refreshed, but a fetch request must be ongoing.. we can wait and block or return an empty list
// if (_block_on_fetches)
return std::vector<std::string>();
}
/**
* Queries the database to check if the schema cache has been already loaded.
*/
bool AutoCompleteCache::refresh_schema_cache_if_needed(const std::string &schema)
{
if (!_shutdown)
{
// Ensures shutdown is not done while processing
base::RecMutexLock sd_lock(_shutdown_mutex);
base::RecMutexLock lock(_sqconn_mutex);
sqlite::query q(*_sqconn, "SELECT last_refresh FROM schemas WHERE name LIKE ? ESCAPE '\\' ");
q.bind(1, schema.size() == 0 ? "%" : base::escape_sql_string(schema, true));
if (q.emit())
{
boost::shared_ptr<sqlite::result> matches(q.get_result());
// schema info is already loaded in cache
if (matches->get_int(0))
{
log_debug3("schema %s is already cached\n", schema.c_str());
return false;
}
}
}
// Triggers a loading task for the schema cache
log_debug3("schema %s is not cached, populating cache...\n", schema.c_str());
refresh_schema_cache(schema);
return true;
}
void AutoCompleteCache::refresh_schema_list_cache_if_needed()
{
add_pending_refresh("");
}
void AutoCompleteCache::refresh_schema_cache(const std::string &schema)
{
log_debug("refresh schema cache for %s\n", schema.c_str());
add_pending_refresh(schema);
}
void AutoCompleteCache::refresh_table_cache(const std::string &schema, const std::string &table)
{
add_pending_refresh(schema + "\n" + table);
}
void AutoCompleteCache::refresh_cache_thread()
{
log_debug2("entering worker thread\n");
// while(!_refresh_thread); //wait until _rfresh_thread is assigned
while (!_shutdown)
{
std::string schema_to_fetch;
if (!get_pending_refresh(schema_to_fetch))
{
break;
}
// Ensures shutdown is not done while processing
if (_shutdown)
break;
log_debug3("will fetch '%s'\n", schema_to_fetch.c_str());
if (schema_to_fetch.empty())
{
refresh_schemas_w();
}
else
{
std::string::size_type s = schema_to_fetch.find('\n');
try
{
if (s == std::string::npos)
{
refresh_tables_w(schema_to_fetch);
refresh_routines_w(schema_to_fetch);
}
else
{
std::string schema = schema_to_fetch.substr(0, s);
std::string table = schema_to_fetch.substr(s+1);
refresh_columns_w(schema, table);
}
}
catch (std::exception &exc)
{
log_error("Exception during update of cache for '%s': %s\n", schema_to_fetch.c_str(), exc.what());
}
}
}
// signal the main thread that the thread is (about to be) gone
_refresh_thread = NULL;
_cache_working.post();
if (_feedback && !_shutdown)
_feedback(false);
log_debug2("leaving worker thread\n");
}
void *AutoCompleteCache::_refresh_cache_thread(void *data)
{
try
{
AutoCompleteCache *self = reinterpret_cast<AutoCompleteCache*>(data);
self->refresh_cache_thread();
} catch (sql::SQLException &exc)
{
log_error("SQLException executing refresh_cache_thread: Error Code: %d\n, %s\n",exc.getErrorCode(), exc.what());
}
return NULL;
}
void AutoCompleteCache::refresh_schemas_w()
{
std::vector<std::string> schemas;
{
sql::Dbc_connection_handler::Ref conn;
base::RecMutexLock lock(_get_connection(conn));
{
std::auto_ptr<sql::Statement> stmt(conn->ref->createStatement());
std::auto_ptr<sql::ResultSet> rs(stmt->executeQuery("SHOW DATABASES"));
if (rs.get())
{
while (rs->next() && !_shutdown)
{
schemas.push_back(rs->getString(1));
}
log_debug2("Found %li schemas.\n", (long)schemas.size());
}
else
log_debug2("No schema found.\n");
}
}
update_schemas(schemas);
}
void AutoCompleteCache::refresh_tables_w(const std::string &schema)
{
std::vector<std::pair<std::string, bool> > tables;
{
sql::Dbc_connection_handler::Ref conn;
// TODO: is it possible that the connection can be locked even it was already deleted???
base::RecMutexLock lock(_get_connection(conn));
{
std::auto_ptr<sql::ResultSet> rs(conn->ref->createStatement()->executeQuery(std::string(base::sqlstring("SHOW FULL TABLES FROM !", 0) << schema)));
if (rs.get())
{
while (rs->next() && !_shutdown)
{
std::string type = rs->getString(2);
std::string table = rs->getString(1);
tables.push_back(std::make_pair(table, type == "VIEW"));
// automatically trigger fetch of columns for this table
add_pending_refresh(schema + "\n" + table);
}
log_debug2("updating %li tables...\n", (long)tables.size());
}
else
log_debug2("no tables for %s\n", schema.c_str());
}
}
update_schema_tables(schema, tables, false);
}
void AutoCompleteCache::refresh_routines_w(const std::string &schema)
{
std::vector<std::pair<std::string, bool> > routines;
{
sql::Dbc_connection_handler::Ref conn;
base::RecMutexLock lock(_get_connection(conn));
{
std::auto_ptr<sql::ResultSet> rs(conn->ref->createStatement()->executeQuery(std::string(base::sqlstring("SHOW PROCEDURE STATUS WHERE Db=?", 0) << schema)));
if (rs.get())
{
while (rs->next() && !_shutdown)
routines.push_back(std::make_pair(rs->getString(2), false));
}
}
{
std::auto_ptr<sql::ResultSet> rs(conn->ref->createStatement()->executeQuery(std::string(base::sqlstring("SHOW FUNCTION STATUS WHERE Db=?", 0) << schema)));
if (rs.get())
{
while (rs->next() && !_shutdown)
routines.push_back(std::make_pair(rs->getString(2), true));
}
}
}
update_schema_routines(schema, routines, false);
}
void AutoCompleteCache::refresh_columns_w(const std::string &schema, const std::string &table)
{
std::vector<std::string> columns;
{
sql::Dbc_connection_handler::Ref conn;
base::RecMutexLock lock(_get_connection(conn));
{
std::auto_ptr<sql::Statement> statement(conn->ref->createStatement());
std::auto_ptr<sql::ResultSet> rs(statement->executeQuery(std::string(base::sqlstring("SHOW COLUMNS FROM !.!", 0) << schema << table)));
if (rs.get())
{
while (rs->next() && !_shutdown)
columns.push_back(rs->getString(1));
}
}
}
update_table_columns(schema, table, columns);
}
#define CREATE_META \
"create table meta ("\
" name varchar(64) primary key,"\
" value varchar(64)"\
")"
#define CREATE_SCHEMAS \
"create table schemas ("\
" name varchar(64) primary key,"\
" last_refresh int default 0"\
")"
#define CREATE_TABLES \
"create table tables ("\
" schema varchar(64) NOT NULL,"\
" name varchar(64) NOT NULL,"\
" is_view int default 0,"\
" primary key (schema, name)"\
")"
#define CREATE_ROUTINES \
"create table routines ("\
" schema varchar(64) NOT NULL,"\
" name varchar(64) NOT NULL,"\
" is_function int default 0,"\
" primary key (schema, name)"\
")"
#define CREATE_COLUMNS \
"create table columns ("\
" schema varchar(64) NOT NULL,"\
" tabl varchar(64) NOT NULL,"\
" name varchar(64) NOT NULL,"\
" primary key (schema, tabl, name),"\
" foreign key (schema, tabl) references tables (schema, name) on delete cascade"\
")"
void AutoCompleteCache::init_db()
{
log_info("Initializing autocompletion cache for %s\n", _connection_id.c_str());
try
{
sqlite::execute(*_sqconn, CREATE_META, true);
}
catch (std::exception &exc)
{
log_error("Error creating cache db.meta: %s\n", exc.what());
}
try
{
sqlite::execute(*_sqconn, CREATE_SCHEMAS, true);
}
catch (std::exception &exc)
{
log_error("Error creating cache db.schemas: %s\n", exc.what());
}
try
{
sqlite::execute(*_sqconn, CREATE_TABLES, true);
}
catch (std::exception &exc)
{
log_error("Error creating cache db.tables: %s\n", exc.what());
}
try
{
sqlite::execute(*_sqconn, CREATE_ROUTINES, true);
}
catch (std::exception &exc)
{
log_error("Error creating cache db.routines: %s\n", exc.what());
}
try
{
sqlite::execute(*_sqconn, CREATE_COLUMNS, true);
}
catch (std::exception &exc)
{
log_error("Error creating cache db.columns: %s\n", exc.what());
}
}
bool AutoCompleteCache::is_schema_list_fetch_done()
{
base::RecMutexLock lock(_sqconn_mutex);
sqlite::query q(*_sqconn, "select * from schemas");
if (q.emit())
return true;
return false;
}
bool AutoCompleteCache::is_schema_tables_fetch_done(const std::string &schema)
{
base::RecMutexLock lock(_sqconn_mutex);
sqlite::query q(*_sqconn, "select * from tables where schema = ?");
q.bind(1, schema);
if (q.emit())
return true;
return false;
}
bool AutoCompleteCache::is_schema_table_columns_fetch_done(const std::string &schema, const std::string &table)
{
base::RecMutexLock lock(_sqconn_mutex);
sqlite::query q(*_sqconn, "select * from columns where schema = ? and tabl = ?");
q.bind(1, schema);
q.bind(2, table);
if (q.emit())
return true;
return false;
}
bool AutoCompleteCache::is_schema_routines_fetch_done(const std::string &schema)
{
base::RecMutexLock lock(_sqconn_mutex);
sqlite::query q(*_sqconn, "select * from routines where schema = ?");
q.bind(1, schema);
if (q.emit())
return true;
return false;
}
void AutoCompleteCache::touch_schema_record(const std::string &schema)
{
{
sqlite::query q(*_sqconn, "select * from schemas where name=?");
q.bind(1, schema);
if (q.emit())
{
sqlite::command update(*_sqconn, "update schemas set last_refresh=strftime('%s', 'now') where name=?");
update.bind(1, schema);
update.emit();
return;
}
}
{
sqlite::command insert(*_sqconn, "insert into schemas (name, last_refresh) values (?, strftime('%s', 'now'))");
insert.bind(1, schema);
insert.emit();
}
}
void AutoCompleteCache::update_schemas(const std::vector<std::string> &schemas)
{
try
{
if (!_shutdown)
{
// Ensures shutdown is not done while processing
base::RecMutexLock sd_lock(_shutdown_mutex);
base::RecMutexLock lock(_sqconn_mutex);
std::map<std::string, int> old_schema_update_times;
{
sqlite::query q(*_sqconn, "select name, last_refresh from schemas");
if (q.emit())
{
boost::shared_ptr<sqlite::result> matches(q.get_result());
do
{
std::string name = matches->get_string(0);
if (!name.empty()) // entry with empty name means a fetch is underway
old_schema_update_times[name] = matches->get_int(1);
}
while (matches->next_row());
}
}
sqlide::Sqlite_transaction_guarder trans(_sqconn, false); //will be committed when will go out of the scope
{
sqlite::execute del(*_sqconn, "delete from schemas");
del.emit();
}
sqlite::execute insert(*_sqconn, "insert into schemas (name, last_refresh) values (?, ?)");
for (std::vector<std::string>::const_iterator t = schemas.begin(); t != schemas.end(); ++t)
{
insert.bind(1, *t);
if (old_schema_update_times.find(*t) == old_schema_update_times.end())
insert.bind(2, 0);
else
insert.bind(2, old_schema_update_times[*t]);
insert.emit();
insert.clear();
}
// if there were no tables, create a dummy item signaling the update already happened
if (schemas.empty())
{
sqlite::execute insert(*_sqconn, "insert into schemas (name) values ('')");
insert.emit();
}
_schema_list_fetched = true;
}
}
catch (std::exception &exc)
{
log_error("Exception caught while updating schema name cache: %s",
exc.what());
}
}
void AutoCompleteCache::update_schema_tables(const std::string &schema,
const std::vector<std::pair<std::string, bool> > &tables, bool just_append)
{
try
{
if (!_shutdown)
{
// Ensures shutdown is not done while processing
base::RecMutexLock sd_lock(_shutdown_mutex);
base::RecMutexLock lock(_sqconn_mutex);
touch_schema_record(schema);
sqlide::Sqlite_transaction_guarder trans(_sqconn, false); //will be committed when will go out of the scope
// Clear records for this schema if we are not just appending.
if (!just_append)
{
sqlite::execute del(*_sqconn, "delete from tables where schema = ?");
del.bind(1, schema);
del.emit();
}
sqlite::execute insert(*_sqconn, "insert into tables (schema, name, is_view) values (?, ?, ?)");
for (std::vector<std::pair<std::string, bool> >::const_iterator t = tables.begin(); t != tables.end(); ++t)
{
insert.bind(1, schema);
insert.bind(2, t->first);
insert.bind(3, t->second ? 1 : 0);
insert.emit();
insert.clear();
}
// if there were no tables, create a dummy item signaling the update already happened
if (tables.empty())
{
sqlite::execute insert(*_sqconn, "insert into tables (schema, name, is_view) values (?, '', -1)");
insert.bind(1, schema);
insert.emit();
}
}
}
catch (std::exception &exc)
{
log_error("Exception caught while updating table name cache for schema %s: %s\n", schema.c_str(),
exc.what());
}
}
void AutoCompleteCache::update_schema_routines(const std::string &schema,
const std::vector<std::pair<std::string, bool> > &routines, bool just_append)
{
try
{
if (!_shutdown)
{
// Ensures shutdown is not done while processing
base::RecMutexLock sd_lock(_shutdown_mutex);
base::RecMutexLock lock(_sqconn_mutex);
touch_schema_record(schema);
sqlide::Sqlite_transaction_guarder trans(_sqconn, false); // Will be committed when we go out of the scope.
// Clear records for this schema if we are not just appending.
if (!just_append)
{
sqlite::execute del(*_sqconn, "delete from routines where schema = ?");
del.bind(1, schema);
del.emit();
}
sqlite::query insert(*_sqconn, "insert into routines (schema, name, is_function) values (?, ?, ?)");
for (std::vector<std::pair<std::string, bool> >::const_iterator t = routines.begin(); t != routines.end(); ++t)
{
insert.bind(1, schema);
insert.bind(2, t->first);
insert.bind(3, t->second);
insert.emit();
insert.clear();
}
// if there were no routines, create a dummy item signaling the update already happened
if (routines.empty())
{
sqlite::execute insert(*_sqconn, "insert into routines (schema, name, is_function) values (?, '', -1)");
insert.bind(1, schema);
insert.emit();
}
}
}
catch (std::exception &exc)
{
log_error("Exception caught while updating routine name cache for schema %s: %s\n", schema.c_str(),
exc.what());
}
}
void AutoCompleteCache::update_table_columns(const std::string &schema, const std::string &table,
const std::vector<std::string> &columns)
{
if (!_shutdown)
{
// Ensures shutdown is not done while processing
base::RecMutexLock sd_lock(_shutdown_mutex);
base::RecMutexLock lock(_sqconn_mutex);
try
{
sqlide::Sqlite_transaction_guarder trans(_sqconn, false); //will be committed when will go out of the scope
// clear records for this schema
{
sqlite::execute del(*_sqconn, "delete from columns where schema = ? and tabl = ?");
del.bind(1, schema);
del.bind(2, table);
del.emit();
}
sqlite::query insert(*_sqconn, "insert into columns (schema, tabl, name) values (?, ?, ?)");
for (std::vector<std::string>::const_iterator t = columns.begin(); t != columns.end(); ++t)
{
insert.bind(1, schema);
insert.bind(2, table);
insert.bind(3, *t);
insert.emit();
insert.clear();
}
// if there were no columns, create a dummy item signaling the update already happened
if (columns.empty())
{
sqlite::execute insert(*_sqconn, "insert into columns (schema, tabl, name) values (?, ?, '')");
insert.bind(1, schema);
insert.bind(2, table);
insert.emit();
}
}
catch (std::exception &exc)
{
log_error("Exception caught while updating column name cache for %s.%s: %s\n", schema.c_str(), table.c_str(),
exc.what());
}
}
}
void AutoCompleteCache::add_pending_refresh(const std::string& task)
{
if (!_shutdown)
{
// Ensures shutdown is not done while processing
base::RecMutexLock sd_lock(_shutdown_mutex);
base::RecMutexLock lock(_pending_mutex);
if ((!task.empty() || !_schema_list_fetched) && std::find(_pending_refresh_schema.begin(), _pending_refresh_schema.end(), task)
== _pending_refresh_schema.end())
{
_pending_refresh_schema.push_back(task);
}
}
// Create the worker thread if there's work to do. Does nothing if there's already a thread.
if (_pending_refresh_schema.size() > 0)
create_worker_thread();
}
bool AutoCompleteCache::get_pending_refresh(std::string &task)
{
bool ret_val = false;
if (!_shutdown)
{
// Ensures shutdown is not done while processing
base::RecMutexLock sd_lock(_shutdown_mutex);
base::RecMutexLock lock(_pending_mutex);
if (!_pending_refresh_schema.empty())
{
ret_val = true;
task = _pending_refresh_schema.front();
_pending_refresh_schema.pop_front();
}
}
return ret_val;
}
void AutoCompleteCache::create_worker_thread()
{
// Fire up thread to start caching.
//if (!_refresh_thread)
if(!_cache_working.try_wait()) // If there is already working thread, just do nothing and exit.
return;
_refresh_thread = NULL;
// if (!_refresh_thread)
// {
if (!_shutdown)
{
GError *error = NULL;
log_debug3("creating worker thread\n");
// if (_refresh_thread)
// throw std::logic_error("Starting new AutoCompleteCache worker, but the previous one didn't die");
_refresh_thread = base::create_thread(&AutoCompleteCache::_refresh_cache_thread, this, &error);
if (!_refresh_thread)
{
log_error("Error creating autocompletion worker thread: %s\n", error ? error->message : "out of mem?");
g_error_free(error);
}
else
if (_feedback)
_feedback(true);
}
// }
}
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