Enable Leak Detection in CI Pipeline (#242)

Motivation:
Address lack of ByteBuffer leak detection during development to prevent
potential production issues.

Modifications:
Added leak detection feature to CI pipeline for automatic detection
during testing.

Result:
Better CI
Resolves #241

---------

Signed-off-by: jchrys <jchrys@me.com>

.github/scripts/ensure_no_leak.sh

@@ -0,0 +1,30 @@
+#!/bin/bash
+#
+# Copyright 2024 asyncer.io projects
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     https://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+#
+set -e
+
+if [ "$#" -ne 1 ] || [ "${1##*.}" != "log" ]; then
+    echo "Please provide a single log file with a .log extension."
+    exit 1
+fi
+
+if grep -q 'LEAK' "$1" ; then
+    echo "LEAK FOUND: The log file $1 contains a memory leak."
+    exit 1
+fi
+
+echo "No Leak: The log file $1 does not contain any memory leaks."
+exit 0

.github/workflows/ci-integration-tests.yml

@@ -33,4 +33,9 @@ jobs:
           -Dmaven.surefire.skip=true \
           -Dtest.mysql.password=r2dbc-password!@ \
           -Dtest.mysql.version=${{ matrix.mysql-version }} \
-          -Dorg.slf4j.simpleLogger.log.org.apache.maven.cli.transfer.Slf4jMavenTransferListener=WARN
+          -Dorg.slf4j.simpleLogger.log.org.apache.maven.cli.transfer.Slf4jMavenTransferListener=WARN \
+          -Dio.netty.leakDetectionLevel=paranoid \
+          -Dio.netty.leakDetection.targetRecords=32 \
+          | tee test.log
+      - name: ensure no leaks
+        run: ./.github/scripts/ensure_no_leak.sh test.log

.github/workflows/ci-mariadb-intergration-tests.yml

@@ -34,4 +34,10 @@ jobs:
           -Dtest.mysql.password=r2dbc-password!@ \
           -Dtest.mysql.version=${{ matrix.mariadb-version }} \
           -Dtest.db.type=mariadb \
-          -Dorg.slf4j.simpleLogger.log.org.apache.maven.cli.transfer.Slf4jMavenTransferListener=WARN
+          -Dorg.slf4j.simpleLogger.log.org.apache.maven.cli.transfer.Slf4jMavenTransferListener=WARN \
+          -Dorg.slf4j.simpleLogger.log.org.apache.maven.cli.transfer.Slf4jMavenTransferListener=WARN \
+          -Dio.netty.leakDetectionLevel=paranoid \
+          -Dio.netty.leakDetection.targetRecords=32 \
+          | tee test.log
+      - name: ensure no leaks
+        run: ./.github/scripts/ensure_no_leak.sh test.log

.github/workflows/ci-unit-tests.yml

@@ -20,4 +20,10 @@ jobs:
           java-version: ${{ matrix.java-version }}
           cache: maven
       - name: Unit test with Maven
-        run: ./mvnw -B test -Dorg.slf4j.simpleLogger.log.org.apache.maven.cli.transfer.Slf4jMavenTransferListener=WARN
+        run: | 
+          ./mvnw -B test -Dorg.slf4j.simpleLogger.log.org.apache.maven.cli.transfer.Slf4jMavenTransferListener=WARN \
+          -Dio.netty.leakDetectionLevel=paranoid \
+          -Dio.netty.leakDetection.targetRecords=32 \
+          | tee test.log
+      - name: ensure no leaks
+        run: ./.github/scripts/ensure_no_leak.sh test.log

r2dbc-mysql/src/test/resources/logback-test.xml

@@ -26,6 +26,7 @@
     <logger name="org.testcontainers"   level="INFO"/>
     <logger name="reactor.netty"        level="INFO"/>
     <logger name="com.zaxxer.hikari"    level="WARN"/>
+    <logger name="io.netty"             level="WARN"/>
 
     <root level="INFO">
         <appender-ref ref="STDOUT"/>