Merge branch '2.3' into 2.4

system-test/cache_runtime_ttl.cpp

@@ -0,0 +1,193 @@
+/*
+ * Copyright (c) 2016 MariaDB Corporation Ab
+ *
+ * Use of this software is governed by the Business Source License included
+ * in the LICENSE.TXT file and at www.mariadb.com/bsl11.
+ *
+ * Change Date: 2024-07-07
+ *
+ * On the date above, in accordance with the Business Source License, use
+ * of this software will be governed by version 2 or later of the General
+ * Public License.
+ */
+
+#include <iostream>
+#include <string>
+#include <vector>
+#include <maxtest/testconnections.hh>
+
+using namespace std;
+
+namespace
+{
+
+enum class Column
+{
+    A,
+    B,
+};
+
+void drop(TestConnections& test)
+{
+    MYSQL* pMysql = test.maxscales->conn_rwsplit[0];
+
+    string stmt("DROP TABLE IF EXISTS cache_test");
+
+    cout << stmt << endl;
+    test.try_query(pMysql, "%s", stmt.c_str());
+}
+
+void create(TestConnections& test)
+{
+    drop(test);
+
+    MYSQL* pMysql = test.maxscales->conn_rwsplit[0];
+
+    string stmt("CREATE TABLE cache_test (a INT, b INT)");
+
+    cout << stmt << endl;
+    test.try_query(pMysql, "%s", stmt.c_str());
+}
+
+void insert(TestConnections& test)
+{
+    MYSQL* pMysql = test.maxscales->conn_rwsplit[0];
+
+    string stmt("INSERT INTO cache_test VALUES (1, 1)");
+
+    cout << stmt << endl;
+    test.try_query(pMysql, "%s", stmt.c_str());
+}
+
+void update(TestConnections& test, Column column, int value)
+{
+    MYSQL* pMysql = test.maxscales->conn_rwsplit[0];
+
+    string stmt("UPDATE cache_test SET ");
+    stmt += (column == Column::A) ? "a=" : "b=";
+    stmt += std::to_string(value);
+
+    cout << stmt << endl;
+    test.try_query(pMysql, "%s", stmt.c_str());
+}
+
+void select(TestConnections& test, Column column, int* pValue)
+{
+    MYSQL* pMysql = test.maxscales->conn_rwsplit[0];
+
+    string stmt("SELECT ");
+    stmt += (column == Column::A) ? "a" : "b";
+    stmt += " FROM cache_test";
+
+    cout << stmt << endl;
+
+    if (mysql_query(pMysql, stmt.c_str()) == 0)
+    {
+        if (mysql_field_count(pMysql) != 0)
+        {
+            size_t nRows = 0;
+
+            do
+            {
+                MYSQL_RES* pRes = mysql_store_result(pMysql);
+                MYSQL_ROW row = mysql_fetch_row(pRes);
+                *pValue = atoi(row[0]);
+                mysql_free_result(pRes);
+                ++nRows;
+            }
+            while (mysql_next_result(pMysql) == 0);
+
+            test.expect(nRows == 1, "Unexpected number of rows: %lu", nRows);
+        }
+    }
+    else
+    {
+        test.expect(false, "SELECT failed.");
+    }
+}
+
+namespace Cache
+{
+
+enum What
+{
+    SOFT_TTL,
+    HARD_TTL
+};
+}
+
+void set(TestConnections& test, Cache::What what, uint32_t value)
+{
+    MYSQL* pMysql = test.maxscales->conn_rwsplit[0];
+
+    string stmt("SET @maxscale.cache.");
+    stmt += ((what == Cache::SOFT_TTL) ? "soft_ttl" : "hard_ttl");
+    stmt += "=";
+    stmt += std::to_string(value);
+
+    cout << stmt << endl;
+    test.try_query(pMysql, "%s", stmt.c_str());
+}
+}
+
+
+namespace
+{
+
+void init(TestConnections& test)
+{
+    create(test);
+    insert(test);
+}
+
+void run(TestConnections& test)
+{
+    init(test);
+    int value;
+
+    // Let's set a long hard_ttl so that it will not interfere
+    // with the soft_ttl testing.
+    set(test, Cache::HARD_TTL, 60);
+    // And update the cache.
+    select(test, Column::A, &value);
+    test.expect(value == 1, "Initial value was not 1.");
+    select(test, Column::B, &value);
+    test.expect(value == 1, "Initial value was not 1.");
+
+    // Update the real value.
+    update(test, Column::A, 2);     // Now the cache contains 1 and the db 2.
+    update(test, Column::B, 2);     // Now the cache contains 1 and the db 2.
+
+    sleep(5);
+
+    // With a soft_ttl less that the amount we slept should mean that
+    // the value in the cache is considered stale and that the value
+    // is fetched from the server.
+    set(test, Cache::SOFT_TTL, 4);
+    select(test, Column::A, &value);
+    test.expect(value == 2, "The value received was not the latest one.");
+
+    // With a soft_ttl larger that the amount we slept should mean that
+    // the value in the cache is *not* considered stale and that we
+    // get that value.
+    set(test, Cache::SOFT_TTL, 10);
+    select(test, Column::B, &value);
+    test.expect(value == 1, "The value received was not from the cache.");
+}
+}
+
+int main(int argc, char* argv[])
+{
+    TestConnections test(argc, argv);
+
+    if (test.maxscales->connect_rwsplit() == 0)
+    {
+        run(test);
+    }
+
+    test.maxscales->connect();
+    drop(test);
+    test.maxscales->disconnect();
+
+    return test.global_result;
+}