b0d29bc47d
Having kyua in the base system will simplify automated testing in CI and eliminates bootstrapping issues on new platforms. The build of kyua is controlled by WITH(OUT)_TESTS_SUPPORT. Reviewed by: emaste Obtained from: CheriBSD Sponsored by: DARPA Differential Revision: https://reviews.freebsd.org/D24103
138 lines
4.7 KiB
C++
138 lines
4.7 KiB
C++
// Copyright 2011 The Kyua Authors.
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// All rights reserved.
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//
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// Redistribution and use in source and binary forms, with or without
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// modification, are permitted provided that the following conditions are
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// met:
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//
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// * Redistributions of source code must retain the above copyright
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// notice, this list of conditions and the following disclaimer.
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// * Redistributions in binary form must reproduce the above copyright
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// notice, this list of conditions and the following disclaimer in the
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// documentation and/or other materials provided with the distribution.
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// * Neither the name of Google Inc. nor the names of its contributors
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// may be used to endorse or promote products derived from this software
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// without specific prior written permission.
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//
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// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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#include "store/metadata.hpp"
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#include "store/exceptions.hpp"
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#include "utils/format/macros.hpp"
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#include "utils/sanity.hpp"
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#include "utils/sqlite/database.hpp"
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#include "utils/sqlite/exceptions.hpp"
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#include "utils/sqlite/statement.ipp"
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namespace sqlite = utils::sqlite;
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namespace {
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/// Fetches an integer column from a statement of the 'metadata' table.
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///
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/// \param stmt The statement from which to get the column value.
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/// \param column The name of the column to retrieve.
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///
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/// \return The value of the column.
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///
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/// \throw store::integrity_error If there is a problem fetching the value
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/// caused by an invalid schema or data.
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static int64_t
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int64_column(sqlite::statement& stmt, const char* column)
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{
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int index;
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try {
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index = stmt.column_id(column);
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} catch (const sqlite::invalid_column_error& e) {
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UNREACHABLE_MSG("Invalid column specification; the SELECT statement "
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"should have caught this");
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}
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if (stmt.column_type(index) != sqlite::type_integer)
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throw store::integrity_error(F("The '%s' column in 'metadata' table "
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"has an invalid type") % column);
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return stmt.column_int64(index);
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}
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} // anonymous namespace
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/// Constructs a new metadata object.
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///
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/// \param schema_version_ The schema version.
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/// \param timestamp_ The time at which this version was created.
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store::metadata::metadata(const int schema_version_, const int64_t timestamp_) :
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_schema_version(schema_version_),
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_timestamp(timestamp_)
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{
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}
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/// Returns the timestamp of this entry.
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///
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/// \return The timestamp in this metadata entry.
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int64_t
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store::metadata::timestamp(void) const
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{
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return _timestamp;
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}
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/// Returns the schema version.
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///
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/// \return The schema version in this metadata entry.
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int
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store::metadata::schema_version(void) const
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{
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return _schema_version;
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}
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/// Reads the latest metadata entry from the database.
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///
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/// \param db The database from which to read the metadata from.
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///
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/// \return The current metadata of the database. It is not OK for the metadata
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/// table to be empty, so this is guaranteed to return a value unless there is
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/// an error.
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///
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/// \throw store::integrity_error If the metadata in the database is empty,
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/// has an invalid schema or its contents are bogus.
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store::metadata
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store::metadata::fetch_latest(sqlite::database& db)
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{
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try {
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sqlite::statement stmt = db.create_statement(
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"SELECT schema_version, timestamp FROM metadata "
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"ORDER BY schema_version DESC LIMIT 1");
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if (!stmt.step())
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throw store::integrity_error("The 'metadata' table is empty");
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const int schema_version_ =
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static_cast< int >(int64_column(stmt, "schema_version"));
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const int64_t timestamp_ = int64_column(stmt, "timestamp");
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if (stmt.step())
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UNREACHABLE_MSG("Got more than one result from a query that "
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"does not permit this; any pragmas defined?");
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return metadata(schema_version_, timestamp_);
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} catch (const sqlite::error& e) {
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throw store::integrity_error(F("Invalid metadata schema: %s") %
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e.what());
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}
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}
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