HHH-14892 Use tmpfs for MySQL and enable parallel testing for it

Author: beikov

docker_db.sh

@@ -79,6 +79,7 @@ mysql_setup() {
         -e MYSQL_PASSWORD=hibernate_orm_test \
         -e MYSQL_ROOT_PASSWORD=hibernate_orm_test \
         -e MYSQL_DATABASE=hibernate_orm_test \
+        --tmpfs /var/lib/mysql \
         -p3306:3306 -d "${image_value}" \
         --character-set-server=utf8mb4 \
         --collation-server=utf8mb4_0900_as_cs \
@@ -101,9 +102,42 @@ mysql_setup() {
 
     if [ "$n" -gt 5 ]; then
         echo "MySQL failed to start and configure after 30 seconds"
+        exit 1
     else
         echo "MySQL successfully started"
     fi
+
+    # Wait for MySQL to become ready
+    OUTPUT=
+    n=0
+    until [ "$n" -gt 5 ]; do
+        OUTPUT="$( { $CONTAINER_CLI exec mysql bash -c "mysqladmin ping -u root -phibernate_orm_test"; } 2>/dev/null )"
+        if [[ $OUTPUT == *"alive"* ]]; then
+            break;
+        fi
+        n=$((n+1))
+        echo "Waiting for MySQL to be ready..."
+        sleep 2
+    done
+
+    if [ "$n" -gt 5 ]; then
+        echo "MySQL failed to become ready after 10 seconds"
+        exit 1
+    else
+        echo "MySQL is ready"
+    fi
+
+    databases=()
+    for n in $(seq 1 $(($(nproc)/2)))
+    do
+      databases+=("hibernate_orm_test_${n}")
+    done
+    create_cmd=
+    for i in "${!databases[@]}";do
+      create_cmd+="create database ${databases[i]}; grant all privileges on ${databases[i]}.* to 'hibernate_orm_test'@'%';"
+    done
+    $CONTAINER_CLI exec mysql bash -c "mysql -u root -phibernate_orm_test -e \"${create_cmd}\"" 2>/dev/null
+    echo "MySQL databases were successfully setup"
 }
 
 mariadb() {

hibernate-core/hibernate-core.gradle

@@ -261,7 +261,7 @@ tasks.withType( Test.class ).each { test ->
 
     // see GradleParallelTestingResolver for how the test worker id is resolved in JDBC configs
     if ( project.db == "h2" || project.db == "hsqldb" || project.db == "pgsql_ci" || project.db == "edb_ci"
-            || project.db == "oracle_ci" || project.db == "oracle_xe_ci" ) {
+            || project.db == "oracle_ci" || project.db == "oracle_xe_ci" || project.db == "mysql_ci" ) {
         // Most systems have multi-threading and maxing out a core on both threads will hurt performance
         // Also, as soon as we hit 16+ threads, the returns are diminishing, so divide by 4
         def threadCount = Runtime.runtime.availableProcessors()

hibernate-envers/hibernate-envers.gradle

@@ -57,7 +57,7 @@ configurations {
 tasks.withType( Test.class ).each { test ->
     // see GradleParallelTestingResolver for how the test worker id is resolved in JDBC configs
     if ( project.db == "h2" || project.db == "hsqldb" || project.db == "pgsql_ci" || project.db == "edb_ci"
-            || project.db == "oracle_ci" || project.db == "oracle_xe_ci" ) {
+            || project.db == "oracle_ci" || project.db == "oracle_xe_ci" || project.db == "mysql_ci" ) {
         // Most systems have multi-threading and maxing out a core on both threads will hurt performance
         // Also, as soon as we hit 16+ threads, the returns are diminishing, so divide by 4
         def threadCount = Runtime.runtime.availableProcessors()

local-build-plugins/src/main/groovy/local.databases.gradle

@@ -145,7 +145,7 @@ ext {
                     'jdbc.driver': 'com.mysql.cj.jdbc.Driver',
                     'jdbc.user'  : 'hibernate_orm_test',
                     'jdbc.pass'  : 'hibernate_orm_test',
-                    'jdbc.url'   : 'jdbc:mysql://' + dbHost + '/hibernate_orm_test?allowPublicKeyRetrieval=true',
+                    'jdbc.url'   : 'jdbc:mysql://' + dbHost + '/hibernate_orm_test_$worker?allowPublicKeyRetrieval=true',
                     'jdbc.datasource' : 'com.mysql.jdbc.Driver',
 //                        'jdbc.datasource' : 'com.mysql.cj.jdbc.MysqlDataSource',
                     'connection.init_sql' : ''