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[GNUnet-SVN] r33143 - gnunet/src/peerstore
From: |
gnunet |
Subject: |
[GNUnet-SVN] r33143 - gnunet/src/peerstore |
Date: |
Sun, 27 Apr 2014 19:45:49 +0200 |
Author: otarabai
Date: 2014-04-27 19:45:49 +0200 (Sun, 27 Apr 2014)
New Revision: 33143
Added:
gnunet/src/peerstore/plugin_peerstore_sqlite.c
Removed:
gnunet/src/peerstore/plugin_peerstore_file.c
Modified:
gnunet/src/peerstore/Makefile.am
gnunet/src/peerstore/peerstore.conf.in
Log:
towards PEERSTORE sqlite plugin
Modified: gnunet/src/peerstore/Makefile.am
===================================================================
--- gnunet/src/peerstore/Makefile.am 2014-04-25 18:00:04 UTC (rev 33142)
+++ gnunet/src/peerstore/Makefile.am 2014-04-27 17:45:49 UTC (rev 33143)
@@ -47,17 +47,17 @@
$(GNUNET_LDFLAGS)
plugin_LTLIBRARIES = \
- libgnunet_plugin_peerstore_file.la
+ libgnunet_plugin_peerstore_sqlite.la
-libgnunet_plugin_peerstore_file_la_SOURCES = \
- plugin_peerstore_file.c
-libgnunet_plugin_peerstore_file_la_LIBADD = \
+libgnunet_plugin_peerstore_sqlite_la_SOURCES = \
+ plugin_peerstore_sqlite.c
+libgnunet_plugin_peerstore_sqlite_la_LIBADD = \
$(top_builddir)/src/peerstore/libgnunetpeerstore.la \
- $(top_builddir)/src/util/libgnunetutil.la \
+ $(top_builddir)/src/util/libgnunetutil.la $(XLIBS) -lsqlite3 \
$(LTLIBINTL)
-libgnunet_plugin_peerstore_file_la_LDFLAGS = \
+libgnunet_plugin_peerstore_sqlite_la_LDFLAGS = \
$(GN_PLUGIN_LDFLAGS)
-libgnunet_plugin_peerstore_file_la_DEPENDENCIES = \
+libgnunet_plugin_peerstore_sqlite_la_DEPENDENCIES = \
$(top_builddir)/src/util/libgnunetutil.la \
libgnunetpeerstore.la
Modified: gnunet/src/peerstore/peerstore.conf.in
===================================================================
--- gnunet/src/peerstore/peerstore.conf.in 2014-04-25 18:00:04 UTC (rev
33142)
+++ gnunet/src/peerstore/peerstore.conf.in 2014-04-27 17:45:49 UTC (rev
33143)
@@ -4,5 +4,8 @@
HOME = $SERVICEHOME
# PORT = 2106
@UNIXONLY@ PORT = 2088
-DATABASE = file
+DATABASE = sqlite
+[peerstore-sqlite]
+FILENAME = $GNUNET_DATA_HOME/peerstore/sqlite.db
+
Deleted: gnunet/src/peerstore/plugin_peerstore_file.c
===================================================================
--- gnunet/src/peerstore/plugin_peerstore_file.c 2014-04-25 18:00:04 UTC
(rev 33142)
+++ gnunet/src/peerstore/plugin_peerstore_file.c 2014-04-27 17:45:49 UTC
(rev 33143)
@@ -1,33 +0,0 @@
-/*
- * This file is part of GNUnet
- * (C) 2013 Christian Grothoff (and other contributing authors)
- *
- * GNUnet 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 3, or (at your
- * option) any later version.
- *
- * GNUnet 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 GNUnet; see the file COPYING. If not, write to the
- * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
- * Boston, MA 02111-1307, USA.
- */
-
-/**
- * @file peerstore/plugin_peerstore_file.c
- * @brief file-based peerstore backend
- * @author Omar Tarabai
- */
-
-#include "platform.h"
-#include "gnunet_peerstore_plugin.h"
-#include "gnunet_peerstore_service.h"
-#include "peerstore.h"
-
-
-/* end of plugin_peerstore_file.c */
Added: gnunet/src/peerstore/plugin_peerstore_sqlite.c
===================================================================
--- gnunet/src/peerstore/plugin_peerstore_sqlite.c
(rev 0)
+++ gnunet/src/peerstore/plugin_peerstore_sqlite.c 2014-04-27 17:45:49 UTC
(rev 33143)
@@ -0,0 +1,270 @@
+/*
+ * This file is part of GNUnet
+ * (C) 2013 Christian Grothoff (and other contributing authors)
+ *
+ * GNUnet 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 3, or (at your
+ * option) any later version.
+ *
+ * GNUnet 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 GNUnet; see the file COPYING. If not, write to the
+ * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+ * Boston, MA 02111-1307, USA.
+ */
+
+/**
+ * @file peerstore/plugin_peerstore_sqlite.c
+ * @brief sqlite-based peerstore backend
+ * @author Omar Tarabai
+ */
+
+#include "platform.h"
+#include "gnunet_peerstore_plugin.h"
+#include "gnunet_peerstore_service.h"
+#include "peerstore.h"
+#include <sqlite3.h>
+
+/**
+ * After how many ms "busy" should a DB operation fail for good? A
+ * low value makes sure that we are more responsive to requests
+ * (especially PUTs). A high value guarantees a higher success rate
+ * (SELECTs in iterate can take several seconds despite LIMIT=1).
+ *
+ * The default value of 1s should ensure that users do not experience
+ * huge latencies while at the same time allowing operations to
+ * succeed with reasonable probability.
+ */
+#define BUSY_TIMEOUT_MS 1000
+
+/**
+ * Log an error message at log-level 'level' that indicates
+ * a failure of the command 'cmd' on file 'filename'
+ * with the message given by strerror(errno).
+ */
+#define LOG_SQLITE(db, level, cmd) do { GNUNET_log_from (level,
"peerstore-sqlite", _("`%s' failed at %s:%d with error: %s\n"), cmd, __FILE__,
__LINE__, sqlite3_errmsg(db->dbh)); } while(0)
+
+#define LOG(kind,...) GNUNET_log_from (kind, "peerstore-sqlite", __VA_ARGS__)
+
+/**
+ * Context for all functions in this plugin.
+ */
+struct Plugin
+{
+
+ /**
+ * Configuration handle
+ */
+ const struct GNUNET_CONFIGURATION_Handle *cfg;
+
+ /**
+ * Database filename.
+ */
+ char *fn;
+
+ /**
+ * Native SQLite database handle.
+ */
+ sqlite3 *dbh;
+
+ /**
+ * Precompiled SQL for inserting into peerstoredata
+ */
+ sqlite3_stmt *insert_peerstoredata;
+
+};
+
+/**
+ * @brief Prepare a SQL statement
+ *
+ * @param dbh handle to the database
+ * @param sql SQL statement, UTF-8 encoded
+ * @return 0 on success
+ */
+static int
+sql_exec (sqlite3 *dbh, const char *sql)
+{
+ int result;
+
+ result = sqlite3_exec (dbh, sql, NULL, NULL, NULL);
+ LOG (GNUNET_ERROR_TYPE_DEBUG,
+ "Executed `%s' / %d\n", sql, result);
+ if (result != SQLITE_OK)
+ LOG (GNUNET_ERROR_TYPE_ERROR,
+ _("Error executing SQL query: %s\n %s\n"),
+ sqlite3_errmsg (dbh), sql);
+ return result;
+}
+
+/**
+ * @brief Prepare a SQL statement
+ *
+ * @param dbh handle to the database
+ * @param sql SQL statement, UTF-8 encoded
+ * @param stmt set to the prepared statement
+ * @return 0 on success
+ */
+static int
+sql_prepare (sqlite3 *dbh, const char *sql, sqlite3_stmt **stmt)
+{
+ char *tail;
+ int result;
+
+ result = sqlite3_prepare_v2 (dbh, sql, strlen (sql), stmt,
+ (const char **) &tail);
+ LOG (GNUNET_ERROR_TYPE_DEBUG,
+ "Prepared `%s' / %p: %d\n", sql, *stmt, result);
+ if (result != SQLITE_OK)
+ LOG (GNUNET_ERROR_TYPE_ERROR,
+ _("Error preparing SQL query: %s\n %s\n"),
+ sqlite3_errmsg (dbh), sql);
+ return result;
+}
+
+/**
+ * Initialize the database connections and associated
+ * data structures (create tables and indices
+ * as needed as well).
+ *
+ * @param plugin the plugin context (state for this module)
+ * @return GNUNET_OK on success
+ */
+static int
+database_setup (struct Plugin *plugin)
+{
+ char *filename;
+
+ if (GNUNET_OK !=
+ GNUNET_CONFIGURATION_get_value_filename (plugin->cfg, "peerstore-sqlite",
+ "FILENAME", &filename))
+ {
+ GNUNET_log_config_missing (GNUNET_ERROR_TYPE_ERROR,
+ "peerstore-sqlite", "FILENAME");
+ return GNUNET_SYSERR;
+ }
+ if (GNUNET_OK != GNUNET_DISK_file_test (filename))
+ {
+ if (GNUNET_OK != GNUNET_DISK_directory_create_for_file (filename))
+ {
+ GNUNET_break (0);
+ GNUNET_free (filename);
+ return GNUNET_SYSERR;
+ }
+ }
+ /* filename should be UTF-8-encoded. If it isn't, it's a bug */
+ plugin->fn = filename;
+
+ /* Open database and precompile statements */
+ if (SQLITE_OK != sqlite3_open (plugin->fn, &plugin->dbh))
+ {
+ LOG (GNUNET_ERROR_TYPE_ERROR,
+ _("Unable to initialize SQLite: %s.\n"),
+ sqlite3_errmsg (plugin->dbh));
+ return GNUNET_SYSERR;
+ }
+
+ sql_exec (plugin->dbh, "PRAGMA temp_store=MEMORY");
+ sql_exec (plugin->dbh, "PRAGMA synchronous=NORMAL");
+ sql_exec (plugin->dbh, "PRAGMA legacy_file_format=OFF");
+ sql_exec (plugin->dbh, "PRAGMA auto_vacuum=INCREMENTAL");
+ sql_exec (plugin->dbh, "PRAGMA encoding=\"UTF-8\"");
+ sql_exec (plugin->dbh, "PRAGMA count_changes=OFF");
+ sql_exec (plugin->dbh, "PRAGMA page_size=4096");
+
+ sqlite3_busy_timeout (plugin->dbh, BUSY_TIMEOUT_MS);
+
+ /* Create tables */
+
+ sql_exec (plugin->dbh,
+ "CREATE TABLE IF NOT EXISTS peerstoredata (\n"
+ " sub_system TEXT NOT NULL,\n"
+ " peer_id BLOB NOT NULL,\n"
+ " value BLOB NULL"
+ ");");
+
+ /* Prepare statements */
+
+ sql_prepare (plugin->dbh,
+ "INSERT INTO peerstoredata (sub_system, peer_id, value) VALUES
(?,?,?);",
+ &plugin->insert_peerstoredata);
+
+ return GNUNET_OK;
+}
+
+/**
+ * Shutdown database connection and associate data
+ * structures.
+ * @param plugin the plugin context (state for this module)
+ */
+static void
+database_shutdown (struct Plugin *plugin)
+{
+ int result;
+ sqlite3_stmt *stmt;
+ while (NULL != (stmt = sqlite3_next_stmt (plugin->dbh, NULL)))
+ {
+ result = sqlite3_finalize (stmt);
+ if (SQLITE_OK != result)
+ LOG (GNUNET_ERROR_TYPE_WARNING,
+ "Failed to close statement %p: %d\n", stmt, result);
+ }
+ if (SQLITE_OK != sqlite3_close (plugin->dbh))
+ LOG_SQLITE (plugin, GNUNET_ERROR_TYPE_ERROR, "sqlite3_close");
+
+ GNUNET_free_non_null (plugin->fn);
+}
+
+/**
+ * Entry point for the plugin.
+ *
+ * @param cls The struct GNUNET_CONFIGURATION_Handle.
+ * @return NULL on error, otherwise the plugin context
+ */
+void *
+libgnunet_plugin_peerstore_sqlite_init (void *cls)
+{
+ static struct Plugin plugin;
+ const struct GNUNET_CONFIGURATION_Handle *cfg = cls;
+ struct GNUNET_PEERSTORE_PluginFunctions *api;
+
+ if (NULL != plugin.cfg)
+ return NULL; /* can only initialize once! */
+ memset (&plugin, 0, sizeof (struct Plugin));
+ plugin.cfg = cfg;
+ if (GNUNET_OK != database_setup (&plugin))
+ {
+ database_shutdown (&plugin);
+ return NULL;
+ }
+ api = GNUNET_new (struct GNUNET_PEERSTORE_PluginFunctions);
+ api->cls = &plugin;
+ LOG(GNUNET_ERROR_TYPE_INFO, "Sqlite plugin is running\n");
+ return api;
+}
+
+/**
+ * Exit point from the plugin.
+ *
+ * @param cls The plugin context (as returned by "init")
+ * @return Always NULL
+ */
+void *
+libgnunet_plugin_peerstore_sqlite_done (void *cls)
+{
+ struct GNUNET_PEERSTORE_PluginFunctions *api = cls;
+ struct Plugin *plugin = api->cls;
+
+ database_shutdown (plugin);
+ plugin->cfg = NULL;
+ GNUNET_free (api);
+ LOG (GNUNET_ERROR_TYPE_INFO, "Sqlite plugin is finished\n");
+ return NULL;
+
+}
+
+/* end of plugin_peerstore_sqlite.c */
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