/*
 * Copyright 2014-2021 Real Logic Limited.
 *
 * 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.
 */
package io.aeron.test;

import org.junit.jupiter.api.extension.AfterEachCallback;
import org.junit.jupiter.api.extension.BeforeEachCallback;
import org.junit.jupiter.api.extension.ExtensionContext;
import org.junit.platform.commons.util.RuntimeUtils;

import java.util.concurrent.Executors;
import java.util.concurrent.ScheduledExecutorService;
import java.util.concurrent.ScheduledFuture;

public class InterruptingTestCallback implements BeforeEachCallback, AfterEachCallback
{
    private final ScheduledExecutorService scheduler = Executors.newSingleThreadScheduledExecutor();
    private ScheduledFuture<?> timer = null;

    public void afterEach(final ExtensionContext context)
    {
        if (null != timer)
        {
            timer.cancel(false);
        }
    }

    public void beforeEach(final ExtensionContext context)
    {
        timer = null;
        final InterruptAfter annotation = context.getRequiredTestMethod().getAnnotation(InterruptAfter.class);

        if (null != annotation && !RuntimeUtils.isDebugMode())
        {
            final Thread testThread = Thread.currentThread();
            timer = scheduler.schedule(testThread::interrupt, annotation.value(), annotation.unit());
        }
    }
}

@@ -1090,16 +1090,23 @@
 private 
+static 
 final Sc
@@ -1128,25 +1128,25 @@
 Service 
-scheduler
+SCHEDULER
  = Execu
@@ -1183,16 +1183,219 @@
 xecutor(
+%0A        r -%3E%0A        %7B%0A            final Thread thread = new Thread(r);%0A            thread.setDaemon(true);%0A            thread.setName(%22interrupting-test-callback%22);%0A            return thread;%0A        %7D
 );%0A    p
@@ -1565,24 +1565,50 @@
 cel(false);%0A
+            timer = null;%0A
         %7D%0A  
@@ -1970,17 +1970,17 @@
 r = 
-scheduler
+SCHEDULER
 .sch

Fix thread leak in the `InterruptingTestCallback`. An `InterruptingTestCallback` instance is created per test being executed if running with the `@ExtendWith(InterruptingTestCallback.class)` or registering manually. Each instance was creating `ScheduledExecutorService` without shutting it down resulting in a thread being leaked (not shutdown) per instance. When running a test in a loop that would lead to an OOME.