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/* gmsd.m
*
* Copyright (C) 2006-2013 Free Software Foundation, Inc.
*
* Author: Enrico Sersale <enrico@dtedu.net>
* Date: February 2006
*
* This file is part of the GNUstep GWorkspace application
*
* 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; either version 2 of the License, or
* (at your option) any later version.
*
* 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 Street, Fifth Floor, Boston, MA 02111 USA.
*/
#include <sys/types.h>
#include <sys/stat.h>
#include "gmds.h"
#include "dbschema.h"
#include "config.h"
#define GWDebugLog(format, args...) \
do { \
if (GW_DEBUG_LOG) { \
NSLog(format , ## args); \
} \
} while (0)
#define GWPrintfDebugLog(format, args...) \
do { \
if (GW_DEBUG_LOG) { \
fprintf(stderr, format , ## args); \
fflush(stderr); \
} \
} while (0)
#define MAX_RETRY 1000
#define MAX_RES 100
#define TOUCH_INTERVAL (60.0)
enum {
STRING,
ARRAY,
NUMBER,
DATE_TYPE,
DATA
};
enum {
NUM_INT,
NUM_FLOAT,
NUM_BOOL
};
typedef enum _MDKOperatorType
{
MDKLessThanOperatorType,
MDKLessThanOrEqualToOperatorType,
MDKGreaterThanOperatorType,
MDKGreaterThanOrEqualToOperatorType,
MDKEqualToOperatorType,
MDKNotEqualToOperatorType,
MDKInRangeOperatorType
} MDKOperatorType;
static void path_exists(sqlite3_context *context, int argc, sqlite3_value **argv)
{
const unsigned char *path = sqlite3_value_text(argv[0]);
int exists = 0;
if (path) {
struct stat statbuf;
exists = (stat((const char *)path, &statbuf) == 0);
}
sqlite3_result_int(context, exists);
}
static void path_moved(sqlite3_context *context, int argc, sqlite3_value **argv)
{
const unsigned char *oldbase = sqlite3_value_text(argv[0]);
int oldblen = strlen((const char *)oldbase);
const unsigned char *newbase = sqlite3_value_text(argv[1]);
int newblen = strlen((const char *)newbase);
const unsigned char *oldpath = sqlite3_value_text(argv[2]);
int oldplen = strlen((const char *)oldpath);
char *newpath;
int i = newblen;
int j;
newpath = malloc(newblen + oldplen - oldblen + 1);
strncpy(newpath, (const char *)newbase, newblen + oldplen - oldblen + 1);
for (j = oldblen; j < oldplen; j++) {
newpath[i] = oldpath[j];
i++;
}
newpath[i] = '\0';
sqlite3_result_text(context, newpath, strlen(newpath), SQLITE_TRANSIENT);
free(newpath);
}
static void time_stamp(sqlite3_context *context, int argc, sqlite3_value **argv)
{
NSTimeInterval interval = [[NSDate date] timeIntervalSinceReferenceDate];
sqlite3_result_double(context, interval);
}
static void contains_substr(sqlite3_context *context, int argc, sqlite3_value **argv)
{
const char *buff = (const char *)sqlite3_value_text(argv[0]);
const char *substr = (const char *)sqlite3_value_text(argv[1]);
int contains = (strstr(buff, substr) != NULL);
sqlite3_result_int(context, contains);
}
static void append_string(sqlite3_context *context, int argc, sqlite3_value **argv)
{
const char *buff = (const char *)sqlite3_value_text(argv[0]);
const char *str = (const char *)sqlite3_value_text(argv[1]);
if (strstr(buff, str) == NULL) {
char newbuff[2048] = "";
sprintf(newbuff, "%s %s", buff, str);
newbuff[strlen(newbuff)] = '\0';
sqlite3_result_text(context, newbuff, strlen(newbuff), SQLITE_TRANSIENT);
return;
}
sqlite3_result_text(context, buff, strlen(buff), SQLITE_TRANSIENT);
}
static void word_score(sqlite3_context *context, int argc, sqlite3_value **argv)
{
int searchlen = strlen((const char *)sqlite3_value_text(argv[0]));
int foundlen = strlen((const char *)sqlite3_value_text(argv[1]));
int posting_wcount = sqlite3_value_int(argv[2]);
int path_wcount = sqlite3_value_int(argv[3]);
float score = (1.0 * posting_wcount / path_wcount);
if (searchlen != foundlen) {
score *= (1.0 * searchlen / foundlen);
}
sqlite3_result_double(context, score);
}
static void attribute_score(sqlite3_context *context, int argc, sqlite3_value **argv)
{
sqlite3_result_double(context, 0.0);
}
@implementation GMDS
- (void)dealloc
{
NSConnection *connection = [clientInfo objectForKey: @"connection"];
if (connection) {
[nc removeObserver: self
name: NSConnectionDidDieNotification
object: connection];
}
RELEASE (clientInfo);
[nc removeObserver: self
name: NSConnectionDidDieNotification
object: conn];
DESTROY (conn);
RELEASE (connectionName);
if (db != NULL) {
sqlite3_close(db);
}
RELEASE (dbpath);
RELEASE (dbdir);
RELEASE (touchQueries);
[super dealloc];
}
- (id)init
{
self = [super init];
if (self) {
BOOL isdir;
fm = [NSFileManager defaultManager];
dbdir = [NSSearchPathForDirectoriesInDomains(NSLibraryDirectory, NSUserDomainMask, YES) lastObject];
dbdir = [dbdir stringByAppendingPathComponent: @"gmds"];
if (([fm fileExistsAtPath: dbdir isDirectory: &isdir] &isdir) == NO) {
if ([fm createDirectoryAtPath: dbdir attributes: nil] == NO) {
NSLog(@"unable to create: %@", dbdir);
DESTROY (self);
return self;
}
}
dbdir = [dbdir stringByAppendingPathComponent: @".db"];
if (([fm fileExistsAtPath: dbdir isDirectory: &isdir] &isdir) == NO) {
if ([fm createDirectoryAtPath: dbdir attributes: nil] == NO) {
NSLog(@"unable to create: %@", dbdir);
DESTROY (self);
return self;
}
}
dbdir = [dbdir stringByAppendingPathComponent: db_version];
if (([fm fileExistsAtPath: dbdir isDirectory: &isdir] &isdir) == NO) {
if ([fm createDirectoryAtPath: dbdir attributes: nil] == NO) {
NSLog(@"unable to create: %@", dbdir);
DESTROY (self);
return self;
}
}
RETAIN (dbdir);
ASSIGN (dbpath, [dbdir stringByAppendingPathComponent: @"contents.db"]);
db = NULL;
if ([self opendb] == NO) {
DESTROY (self);
return self;
}
conn = [NSConnection defaultConnection];
[conn setRootObject: self];
[conn setDelegate: self];
if ([conn registerName: @"gmds"] == NO) {
NSLog(@"unable to register with name server - quitting.");
DESTROY (self);
return self;
}
nc = [NSNotificationCenter defaultCenter];
[nc addObserver: self
selector: @selector(connectionDidDie:)
name: NSConnectionDidDieNotification
object: conn];
clientInfo = [NSMutableDictionary new];
touchQueries = [NSMutableArray new];
touchind = 0;
[touchQueries addObject: @"select count(is_directory) from paths;"];
[touchQueries addObject: @"select count(word) from words;"];
[touchQueries addObject: @"select count(word_count) from postings;"];
[touchQueries addObject: @"select count(attribute) from attributes;"];
[NSTimer scheduledTimerWithTimeInterval: TOUCH_INTERVAL
target: self
selector: @selector(touchTables:)
userInfo: nil
repeats: YES];
}
return self;
}
- (BOOL)connection:(NSConnection *)parentConnection
shouldMakeNewConnection:(NSConnection *)newConnnection
{
if ([clientInfo objectForKey: @"connection"] == nil) {
CREATE_AUTORELEASE_POOL(pool);
NSProcessInfo *info = [NSProcessInfo processInfo];
NSMutableArray *args = [[info arguments] mutableCopy];
NSUserDefaults *defaults = [NSUserDefaults standardUserDefaults];
id connum = [defaults objectForKey: @"gmds_connection_number"];
unsigned long ln;
NSTask *task;
if (connum == nil) {
connum = [NSNumber numberWithUnsignedLong: 0L];
}
ln = [connum unsignedLongValue];
ASSIGN (connectionName, ([NSString stringWithFormat: @"gmds_%lu", ln]));
if ([conn registerName: connectionName] == NO) {
NSLog(@"unable to register with name server - quitting.");
exit(EXIT_FAILURE);
}
GWDebugLog(@"connection name changed to %@", connectionName);
ln++;
connum = [NSNumber numberWithUnsignedLong: ln];
[defaults setObject: connum forKey: @"gmds_connection_number"];
[defaults synchronize];
task = [NSTask new];
[task setLaunchPath: [[NSBundle mainBundle] executablePath]];
[args removeObjectAtIndex: 0];
if (![args containsObject: @"--daemon"])
{
[args addObject: @"--daemon"];
}
[task setArguments: args];
RELEASE (args);
[task setEnvironment: [info environment]];
[task launch];
RELEASE (task);
RELEASE (pool);
[clientInfo setObject: newConnnection forKey: @"connection"];
[newConnnection setDelegate: self];
[nc addObserver: self
selector: @selector(connectionDidDie:)
name: NSConnectionDidDieNotification
object: newConnnection];
GWDebugLog(@"new client connection");
return YES;
}
NSLog(@"client connection already exists!");
return NO;
}
- (void)connectionDidDie:(NSNotification *)notification
{
id connection = [notification object];
[nc removeObserver: self
name: NSConnectionDidDieNotification
object: connection];
if (connection == conn) {
NSLog(@"[gmds connectionDidDie]: Error: gmds server root connection has been destroyed.");
exit(EXIT_FAILURE);
}
[self terminate];
}
- (oneway void)registerClient:(id)remote
{
if ([clientInfo objectForKey: @"client"] == nil) {
[(id)remote setProtocolForProxy: @protocol(GMDSClientProtocol)];
[clientInfo setObject: remote forKey: @"client"];
GWDebugLog(@"new client registered");
}
}
- (oneway void)unregisterClient:(id)remote
{
id client = [clientInfo objectForKey: @"client"];
if (client && (client == remote)) {
[clientInfo removeObjectForKey: @"client"];
GWDebugLog(@"client unregistered");
[self terminate];
}
}
- (BOOL)performSubquery:(NSString *)query
{
CREATE_AUTORELEASE_POOL(pool);
const char *qbuff = [query UTF8String];
struct sqlite3_stmt *stmt;
int err;
if ((err = sqlite3_prepare(db, qbuff, strlen(qbuff), &stmt, NULL)) == SQLITE_OK) {
int retry = 0;
while (1) {
err = sqlite3_step(stmt);
if (err == SQLITE_DONE) {
break;
} else if (err == SQLITE_BUSY) {
CREATE_AUTORELEASE_POOL(arp);
NSDate *when = [NSDate dateWithTimeIntervalSinceNow: 0.1];
[NSThread sleepUntilDate: when];
GWDebugLog(@"retry %i", retry);
RELEASE (arp);
if (retry++ > MAX_RETRY) {
NSLog(@"%s", sqlite3_errmsg(db));
break;
}
} else {
NSLog(@"%s", sqlite3_errmsg(db));
break;
}
}
sqlite3_finalize(stmt);
}
RELEASE (pool);
return (err == SQLITE_DONE);
}
- (BOOL)performPreQueries:(NSArray *)queries
{
int i;
if ([self performSubquery: @"BEGIN"] == NO) {
return NO;
}
for (i = 0; i < [queries count]; i++) {
if ([self performSubquery: [queries objectAtIndex: i]] == NO) {
[self performSubquery: @"COMMIT"];
return NO;
}
}
[self performSubquery: @"COMMIT"];
return YES;
}
- (void)performPostQueries:(NSArray *)queries
{
int i;
if ([self performSubquery: @"BEGIN"] == NO) {
return;
}
for (i = 0; i < [queries count]; i++) {
[self performSubquery: [queries objectAtIndex: i]];
}
[self performSubquery: @"COMMIT"];
}
- (oneway void)performQuery:(NSDictionary *)queryInfo
{
CREATE_AUTORELEASE_POOL(pool);
NSArray *prequeries = [queryInfo objectForKey: @"pre"];
BOOL prepared = YES;
NSString *query = [queryInfo objectForKey: @"join"];
NSArray *postqueries = [queryInfo objectForKey: @"post"];
NSNumber *queryNumber = [queryInfo objectForKey: @"qnumber"];
const char *qbuff = [query UTF8String];
NSMutableArray *reslines = [NSMutableArray array];
struct sqlite3_stmt *stmt;
int retry = 0;
int err;
int i;
if (prequeries) {
prepared = [self performPreQueries: prequeries];
}
if (prepared && (sqlite3_prepare(db, qbuff, strlen(qbuff), &stmt, NULL) == SQLITE_OK)) {
while (1) {
err = sqlite3_step(stmt);
if (err == SQLITE_ROW) {
NSMutableArray *line = [NSMutableArray array];
int count = sqlite3_data_count(stmt);
// we use "<= count" because sqlite sends also
// the id of the entry with type = 0
for (i = 0; i <= count; i++) {
int type = sqlite3_column_type(stmt, i);
if (type == SQLITE_INTEGER) {
[line addObject: [NSNumber numberWithInt: sqlite3_column_int(stmt, i)]];
} else if (type == SQLITE_FLOAT) {
[line addObject: [NSNumber numberWithDouble: sqlite3_column_double(stmt, i)]];
} else if (type == SQLITE_TEXT) {
[line addObject: [NSString stringWithUTF8String: (const char *)sqlite3_column_text(stmt, i)]];
} else if (type == SQLITE_BLOB) {
const char *bytes = sqlite3_column_blob(stmt, i);
int length = sqlite3_column_bytes(stmt, i);
[line addObject: [NSData dataWithBytes: bytes length: length]];
}
}
[reslines addObject: line];
if ([reslines count] == MAX_RES) {
GWDebugLog(@"SENDING");
if ([self sendResults: reslines forQueryWithNumber: queryNumber]) {
GWDebugLog(@"SENT");
[reslines removeAllObjects];
} else {
GWDebugLog(@"INVALID!");
break;
}
}
} else {
if (err == SQLITE_DONE) {
GWDebugLog(@"SENDING (last)");
if ([self sendResults: reslines forQueryWithNumber: queryNumber]) {
GWDebugLog(@"SENT");
} else {
GWDebugLog(@"INVALID!");
}
break;
} else if (err == SQLITE_BUSY) {
CREATE_AUTORELEASE_POOL(arp);
NSDate *when = [NSDate dateWithTimeIntervalSinceNow: 0.1];
[NSThread sleepUntilDate: when];
GWDebugLog(@"retry %i", retry);
RELEASE (arp);
if (retry++ > MAX_RETRY) {
NSLog(@"%s", sqlite3_errmsg(db));
break;
}
} else {
NSLog(@"%i %s", err, sqlite3_errmsg(db));
break;
}
}
}
sqlite3_finalize(stmt);
} else {
NSLog(@"%s", sqlite3_errmsg(db));
}
if (postqueries) {
[self performPostQueries: postqueries];
}
[self endOfQueryWithNumber: queryNumber];
RELEASE (pool);
}
- (BOOL)sendResults:(NSArray *)lines
forQueryWithNumber:(NSNumber *)qnum
{
CREATE_AUTORELEASE_POOL(arp);
id client = [clientInfo objectForKey: @"client"];
NSDictionary *results;
BOOL accepted;
results = [NSDictionary dictionaryWithObjectsAndKeys: qnum, @"qnumber",
lines, @"lines", nil];
accepted = [client queryResults: [NSArchiver archivedDataWithRootObject: results]];
RELEASE (arp);
return accepted;
}
- (void)endOfQueryWithNumber:(NSNumber *)qnum
{
[[clientInfo objectForKey: @"client"] endOfQueryWithNumber: qnum];
}
- (BOOL)opendb
{
if (db == NULL) {
BOOL newdb = ([fm fileExistsAtPath: dbpath] == NO);
char *err;
db = opendbAtPath(dbpath);
if (db != NULL) {
if (newdb) {
if (sqlite3_exec(db, [db_schema UTF8String], NULL, 0, &err) != SQLITE_OK) {
NSLog(@"unable to create the database at %@", dbpath);
sqlite3_free(err);
return NO;
} else {
GWDebugLog(@"contents database created");
}
}
} else {
NSLog(@"unable to open the database at %@", dbpath);
return NO;
}
sqlite3_create_function(db, "pathExists", 1,
SQLITE_UTF8, 0, path_exists, 0, 0);
sqlite3_create_function(db, "pathMoved", 3,
SQLITE_UTF8, 0, path_moved, 0, 0);
sqlite3_create_function(db, "timeStamp", 0,
SQLITE_UTF8, 0, time_stamp, 0, 0);
sqlite3_create_function(db, "containsSubstr", 2,
SQLITE_UTF8, 0, contains_substr, 0, 0);
sqlite3_create_function(db, "appendString", 2,
SQLITE_UTF8, 0, append_string, 0, 0);
sqlite3_create_function(db, "wordScore", 4,
SQLITE_UTF8, 0, word_score, 0, 0);
sqlite3_create_function(db, "attributeScore", 5,
SQLITE_UTF8, 0, attribute_score, 0, 0);
performWriteQuery(db, @"PRAGMA cache_size = 20000");
performWriteQuery(db, @"PRAGMA count_changes = 0");
performWriteQuery(db, @"PRAGMA synchronous = OFF");
performWriteQuery(db, @"PRAGMA temp_store = MEMORY");
}
/* only to avoid a compiler warning */
if (0) {
NSLog(@"%@", db_schema_tmp);
NSLog(@"%@", user_db_schema);
NSLog(@"%@", user_db_schema_tmp);
}
return YES;
}
- (void)touchTables:(id)sender
{
if ([self isBaseServer]) {
CREATE_AUTORELEASE_POOL(pool);
const char *query = [[touchQueries objectAtIndex: touchind] UTF8String];
NSDate *date = [NSDate date];
char *err;
GWPrintfDebugLog("executing: \"%s\" ... ", query);
if (sqlite3_exec(db, query, NULL, 0, &err) != SQLITE_OK) {
NSLog(@"error at %s", query);
if (err != NULL) {
NSLog(@"%s", err);
sqlite3_free(err);
}
} else {
GWPrintfDebugLog("done. (%.2f sec.)\n", [[NSDate date] timeIntervalSinceDate: date]);
}
touchind++;
if (touchind == [touchQueries count]) {
touchind = 0;
}
RELEASE (pool);
}
}
- (BOOL)isBaseServer
{
return ([clientInfo objectForKey: @"client"] == nil);
}
- (void)terminate
{
NSConnection *connection = [clientInfo objectForKey: @"connection"];
if (connection) {
[nc removeObserver: self
name: NSConnectionDidDieNotification
object: connection];
}
RELEASE (clientInfo);
if (db != NULL) {
sqlite3_close(db);
}
NSLog(@"exiting");
exit(EXIT_SUCCESS);
}
@end
int main(int argc, char** argv)
{
CREATE_AUTORELEASE_POOL(pool);
NSProcessInfo *info = [NSProcessInfo processInfo];
NSMutableArray *args = AUTORELEASE ([[info arguments] mutableCopy]);
BOOL subtask = YES;
if ([args containsObject: @"--daemon"])
subtask = NO;
if (subtask)
{
NSTask *task = [NSTask new];
NS_DURING
{
[args removeObjectAtIndex: 0];
[args addObject: @"--daemon"];
[task setLaunchPath: [[NSBundle mainBundle] executablePath]];
[task setArguments: args];
[task setEnvironment: [info environment]];
[task launch];
DESTROY (task);
}
NS_HANDLER
{
fprintf (stderr, "unable to launch the gmds task. exiting.\n");
DESTROY (task);
}
NS_ENDHANDLER
exit(EXIT_FAILURE);
}
RELEASE(pool);
{
CREATE_AUTORELEASE_POOL (pool);
GMDS *gmds = [[GMDS alloc] init];
RELEASE (pool);
if (gmds != nil)
{
CREATE_AUTORELEASE_POOL (pool);
[[NSRunLoop currentRunLoop] run];
RELEASE (pool);
}
}
exit(EXIT_SUCCESS);
}
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