Fix phase for TaskScheduler instances in tests

Related to: #8856

Many tests create their own `ThreadPoolTaskScheduler` beans.
Therefore, its default phase might affect the memory and performance.

* Use `phase = SmartLifecycle.DEFAULT_PHASE / 2` for manual
 `ThreadPoolTaskScheduler` beans
* Migrate affected tests classes to JUnit 5
* Make some other configuration adjustments for better performance

**Cherry-pick to `6.2.x`**

(cherry picked from commit 39c99c0)

Author: artembilan

spring-integration-core/src/test/java/org/springframework/integration/config/AggregatorParserTests-context.xml

@@ -1,19 +1,17 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <beans:beans xmlns="http://www.springframework.org/schema/integration"
-	xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
-	xmlns:beans="http://www.springframework.org/schema/beans"
-	xmlns:task="http://www.springframework.org/schema/task"
-	xmlns:context="http://www.springframework.org/schema/context"
-	xmlns:util="http://www.springframework.org/schema/util"
-	xsi:schemaLocation="http://www.springframework.org/schema/task https://www.springframework.org/schema/task/spring-task.xsd
-		http://www.springframework.org/schema/beans https://www.springframework.org/schema/beans/spring-beans.xsd
+			 xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+			 xmlns:beans="http://www.springframework.org/schema/beans"
+			 xmlns:context="http://www.springframework.org/schema/context"
+			 xmlns:util="http://www.springframework.org/schema/util"
+			 xsi:schemaLocation="http://www.springframework.org/schema/beans https://www.springframework.org/schema/beans/spring-beans.xsd
 		http://www.springframework.org/schema/context https://www.springframework.org/schema/context/spring-context.xsd
 		http://www.springframework.org/schema/integration https://www.springframework.org/schema/integration/spring-integration.xsd
 		http://www.springframework.org/schema/util https://www.springframework.org/schema/util/spring-util.xsd">
 
 	<context:property-placeholder properties-ref="props"/>
 
-	<util:properties  id="props"/>
+	<util:properties id="props"/>
 
 	<channel id="outputChannel">
 		<queue capacity="5"/>
@@ -40,96 +38,99 @@
 	<beans:bean id="transactionManager" class="org.springframework.integration.transaction.PseudoTransactionManager"/>
 
 	<aggregator id="completelyDefinedAggregator"
-		input-channel="completelyDefinedAggregatorInput"
-		output-channel="outputChannel"
-		discard-channel="discardChannel"
-		ref="aggregatorBean"
-		release-strategy="releaseStrategy"
-		correlation-strategy="correlationStrategy"
-		send-timeout="86420000"
-		send-partial-result-on-expiry="true"
-		expire-groups-upon-completion="true"
-		expire-groups-upon-timeout="false"
-		empty-group-min-timeout="123"
-		group-timeout="456"
-		lock-registry="lockRegistry"
-		scheduler="scheduler"
-		message-store="store"
-		pop-sequence="false"
-		order="5"
-		expire-duration="10000"
-		expire-timeout="250">
-			<expire-transactional/>
+				input-channel="completelyDefinedAggregatorInput"
+				output-channel="outputChannel"
+				discard-channel="discardChannel"
+				ref="aggregatorBean"
+				release-strategy="releaseStrategy"
+				correlation-strategy="correlationStrategy"
+				send-timeout="86420000"
+				send-partial-result-on-expiry="true"
+				expire-groups-upon-completion="true"
+				expire-groups-upon-timeout="false"
+				empty-group-min-timeout="123"
+				group-timeout="456"
+				lock-registry="lockRegistry"
+				scheduler="scheduler"
+				message-store="store"
+				pop-sequence="false"
+				order="5"
+				expire-duration="10000"
+				expire-timeout="250">
+		<expire-transactional/>
 	</aggregator>
 
 	<beans:bean id="lockRegistry" class="org.springframework.integration.support.locks.DefaultLockRegistry"/>
 
-	<task:scheduler id="scheduler"/>
+	<beans:bean id="scheduler"
+				class="org.springframework.scheduling.concurrent.ThreadPoolTaskScheduler">
+		<beans:property name="phase" value="1073741823"/>
+	</beans:bean>
 
 	<beans:bean id="store" class="org.springframework.integration.store.SimpleMessageStore"/>
 
 	<channel id="aggregatorWithExpressionsInput"/>
 	<channel id="aggregatorWithExpressionsOutput"/>
 	<aggregator id="aggregatorWithExpressions"
-		input-channel="aggregatorWithExpressionsInput"
-		output-channel="aggregatorWithExpressionsOutput"
-		expression="?[payload.startsWith('1')].![payload]"
-		release-strategy-expression="#root.size()>2"
-		correlation-strategy-expression="headers['foo']"/>
+				input-channel="aggregatorWithExpressionsInput"
+				output-channel="aggregatorWithExpressionsOutput"
+				expression="?[payload.startsWith('1')].![payload]"
+				release-strategy-expression="#root.size()>2"
+				correlation-strategy-expression="headers['foo']"/>
 
 	<channel id="aggregatorWithReferenceAndMethodInput"/>
 	<aggregator id="aggregatorWithReferenceAndMethod"
-		ref="adderBean"
-		method="add"
-		input-channel="aggregatorWithReferenceAndMethodInput"
-		output-channel="outputChannel"/>
+				ref="adderBean"
+				method="add"
+				input-channel="aggregatorWithReferenceAndMethodInput"
+				output-channel="outputChannel"/>
 
 	<channel id="aggregatorWithPojoReleaseStrategyInput"/>
 	<aggregator id="aggregatorWithPojoReleaseStrategy"
-		input-channel="aggregatorWithPojoReleaseStrategyInput"
-		output-channel="outputChannel"
-		ref="adderBean"
-		method="add"
-		release-strategy="pojoReleaseStrategy"
-		release-strategy-method="checkCompletenessAsList"/>
+				input-channel="aggregatorWithPojoReleaseStrategyInput"
+				output-channel="outputChannel"
+				ref="adderBean"
+				method="add"
+				release-strategy="pojoReleaseStrategy"
+				release-strategy-method="checkCompletenessAsList"/>
 
 	<channel id="aggregatorWithPojoReleaseStrategyInputAsCollection"/>
 	<aggregator id="aggregatorWithPojoReleaseStrategyAsCollection"
-		input-channel="aggregatorWithPojoReleaseStrategyInputAsCollection"
-		output-channel="outputChannel"
-		ref="adderBean"
-		method="add"
-		release-strategy="pojoReleaseStrategy"
-		release-strategy-method="checkCompletenessAsCollection"/>
+				input-channel="aggregatorWithPojoReleaseStrategyInputAsCollection"
+				output-channel="outputChannel"
+				ref="adderBean"
+				method="add"
+				release-strategy="pojoReleaseStrategy"
+				release-strategy-method="checkCompletenessAsCollection"/>
 
 	<channel id="aggregatorWithExpressionsAndPojoAggregatorInput"/>
 	<aggregator id="aggregatorWithExpressionsAndPojoAggregator"
-		input-channel="aggregatorWithExpressionsAndPojoAggregatorInput"
-		ref="aggregatorBean"
-		release-strategy-expression="size() == 2"
-		correlation-strategy-expression="headers['foo']"
-		empty-group-min-timeout="60000"/>
+				input-channel="aggregatorWithExpressionsAndPojoAggregatorInput"
+				ref="aggregatorBean"
+				release-strategy-expression="size() == 2"
+				correlation-strategy-expression="headers['foo']"
+				empty-group-min-timeout="60000"/>
 
 	<beans:bean id="aggregatorBean"
-		class="org.springframework.integration.config.TestAggregatorBean" />
+				class="org.springframework.integration.config.TestAggregatorBean"/>
 
 	<beans:bean id="aggregatorMGPBean"
-		class="org.springframework.integration.aggregator.SimpleMessageGroupProcessor" />
+				class="org.springframework.integration.aggregator.SimpleMessageGroupProcessor"/>
 
 	<beans:bean id="aggregatorCustomMGPBean"
-		class="org.springframework.integration.config.AggregatorParserTests$MyMGP" />
+				class="org.springframework.integration.config.AggregatorParserTests$MyMGP"/>
 
-	 <beans:bean id="adderBean"
-		class="org.springframework.integration.config.Adder" />
+	<beans:bean id="adderBean"
+				class="org.springframework.integration.config.Adder"/>
 
 	<beans:bean id="releaseStrategy"
-		class="org.springframework.integration.config.TestReleaseStrategy" />
+				class="org.springframework.integration.config.TestReleaseStrategy"/>
 
 	<beans:bean id="correlationStrategy" class="org.springframework.integration.config.TestCorrelationStrategy"/>
 
 	<beans:bean id="pojoReleaseStrategy"
-		class="org.springframework.integration.config.MaxValueReleaseStrategy">
-		<beans:constructor-arg value="10" />
+				class="org.springframework.integration.config.MaxValueReleaseStrategy">
+		<beans:constructor-arg value="10"/>
 	</beans:bean>
 
 </beans:beans>

spring-integration-core/src/test/java/org/springframework/integration/config/xml/DelayerParserTests-context.xml

@@ -75,6 +75,7 @@
 
 	<beans:bean id="testScheduler" class="org.springframework.scheduling.concurrent.ThreadPoolTaskScheduler"
 				p:poolSize="7"
+				p:phase="1073741823"
 				p:waitForTasksToCompleteOnShutdown="true"/>
 
 	<beans:bean id="testMessageStore" class="org.springframework.integration.store.SimpleMessageStore"/>

spring-integration-core/src/test/java/org/springframework/integration/config/xml/DelayerUsageTests-context.xml

@@ -49,6 +49,7 @@
 
 	<beans:bean id="multiThreadScheduler" class="org.springframework.scheduling.concurrent.ThreadPoolTaskScheduler"
 				p:poolSize="5"
+				p:phase="1073741823"
 				p:waitForTasksToCompleteOnShutdown="true"/>
 
 	<service-activator input-channel="outputB" output-channel="outputB1" method="processMessage" ref="sampleHandler"/>

spring-integration-core/src/test/java/org/springframework/integration/config/xml/GatewayParserTests-context.xml

@@ -24,10 +24,14 @@
 			 default-request-channel="requestChannel"
 			 proxy-default-methods="true"/>
 
+	<channel id="receiveChannel">
+		<queue />
+	</channel>
+
 	<gateway id="solicitResponse"
 			 service-interface="org.springframework.integration.gateway.TestService"
-			 default-reply-channel="replyChannel"
-			 default-reply-timeout="3000"/>
+			 default-reply-channel="receiveChannel"
+			 default-reply-timeout="5000"/>
 
 	<gateway id="requestReply"
 			 service-interface="org.springframework.integration.gateway.TestService"

spring-integration-core/src/test/java/org/springframework/integration/config/xml/GatewayParserTests.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2022 the original author or authors.
+ * Copyright 2002-2024 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -72,7 +72,7 @@
  * @author Gary Russell
  */
 @SpringJUnitConfig
-@DirtiesContext(classMode = DirtiesContext.ClassMode.AFTER_EACH_TEST_METHOD)
+@DirtiesContext
 public class GatewayParserTests {
 
 	@Autowired
@@ -132,7 +132,7 @@ public void testOneWayOverride() {
 
 	@Test
 	public void testSolicitResponse() {
-		PollableChannel channel = (PollableChannel) context.getBean("replyChannel");
+		PollableChannel channel = (PollableChannel) context.getBean("receiveChannel");
 		channel.send(new GenericMessage<>("foo"));
 		TestService service = (TestService) context.getBean("solicitResponse");
 		String result = service.solicitResponse();

spring-integration-core/src/test/java/org/springframework/integration/config/xml/superParentApplicationContext.xml

@@ -7,6 +7,8 @@
            https://www.springframework.org/schema/integration/spring-integration.xsd">
 
 	<beans:bean id="taskScheduler"
-		class="org.springframework.scheduling.concurrent.ThreadPoolTaskScheduler" />
+		class="org.springframework.scheduling.concurrent.ThreadPoolTaskScheduler">
+		<beans:property name="phase" value="1073741823"/>
+	</beans:bean>
 
 </beans:beans>

spring-integration-core/src/test/java/org/springframework/integration/dsl/flows/IntegrationFlowTests.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2016-2023 the original author or authors.
+ * Copyright 2016-2024 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -41,6 +41,7 @@
 import org.springframework.beans.factory.annotation.Qualifier;
 import org.springframework.beans.factory.config.ConfigurableBeanFactory;
 import org.springframework.context.Lifecycle;
+import org.springframework.context.SmartLifecycle;
 import org.springframework.context.annotation.AnnotationConfigApplicationContext;
 import org.springframework.context.annotation.Bean;
 import org.springframework.context.annotation.ComponentScan;
@@ -586,6 +587,7 @@ public PollerSpec poller() {
 		@Bean(name = IntegrationContextUtils.TASK_SCHEDULER_BEAN_NAME)
 		public TaskScheduler taskScheduler() {
 			ThreadPoolTaskScheduler threadPoolTaskScheduler = new ThreadPoolTaskScheduler();
+			threadPoolTaskScheduler.setPhase(SmartLifecycle.DEFAULT_PHASE / 2);
 			threadPoolTaskScheduler.setPoolSize(100);
 			return threadPoolTaskScheduler;
 		}
@@ -925,7 +927,9 @@ public IntegrationFlow dedicatedPollingThreadFlow() {
 
 		@Bean
 		public TaskScheduler dedicatedTaskScheduler() {
-			return new ThreadPoolTaskScheduler();
+			ThreadPoolTaskScheduler threadPoolTaskScheduler = new ThreadPoolTaskScheduler();
+			threadPoolTaskScheduler.setPhase(SmartLifecycle.DEFAULT_PHASE / 2);
+			return threadPoolTaskScheduler;
 		}
 
 		@Bean

spring-integration-core/src/test/java/org/springframework/integration/endpoint/ExpressionEvaluatingMessageSourceIntegrationTests.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2022 the original author or authors.
+ * Copyright 2002-2024 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -80,6 +80,7 @@ public void test() throws Exception {
 		for (int i = 0; i < 3; i++) {
 			messages.add(channel.receive(1000));
 		}
+		adapter.stop();
 		scheduler.destroy();
 		Message<?> message1 = messages.get(0);
 		assertThat(message1.getPayload()).isEqualTo("test-1");

spring-integration-core/src/test/java/org/springframework/integration/store/MessageStoreReaperTests-context.xml

@@ -1,9 +1,9 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <beans xmlns="http://www.springframework.org/schema/beans"
-	xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
-	xmlns:task="http://www.springframework.org/schema/task"
-	xmlns:int="http://www.springframework.org/schema/integration"
-	xsi:schemaLocation="http://www.springframework.org/schema/task https://www.springframework.org/schema/task/spring-task.xsd
+	   xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+	   xmlns:task="http://www.springframework.org/schema/task"
+	   xmlns:int="http://www.springframework.org/schema/integration"
+	   xsi:schemaLocation="http://www.springframework.org/schema/task https://www.springframework.org/schema/task/spring-task.xsd
 		http://www.springframework.org/schema/beans https://www.springframework.org/schema/beans/spring-beans.xsd
 		http://www.springframework.org/schema/integration https://www.springframework.org/schema/integration/spring-integration.xsd">
 
@@ -23,7 +23,10 @@
 		<task:scheduled ref="reaper3" method="run" fixed-rate="100"/>
 	</task:scheduled-tasks>
 
-	<task:scheduler id="scheduler"/>
+	<bean id="scheduler"
+		  class="org.springframework.scheduling.concurrent.ThreadPoolTaskScheduler">
+		<property name="phase" value="1073741823"/>
+	</bean>
 
 	<bean id="messageStore2" class="org.springframework.integration.store.SimpleMessageStore">
 		<property name="expiryCallbacks" ref="expiryCallback2"/>
@@ -35,21 +38,21 @@
 		<property name="messageGroupStore" ref="messageStore2"/>
 	</bean>
 
-	<bean id="messageStore3" class="org.springframework.integration.store.SimpleMessageStore" />
+	<bean id="messageStore3" class="org.springframework.integration.store.SimpleMessageStore"/>
 
 	<bean id="reaper3" class="org.springframework.integration.store.MessageGroupStoreReaper">
 		<property name="messageGroupStore" ref="messageStore3"/>
-		<property name="timeout" value="50" />
+		<property name="timeout" value="50"/>
 	</bean>
 
 	<int:aggregator input-channel="aggChannel"
-		discard-channel="discards"
-		message-store="messageStore3" />
+					discard-channel="discards"
+					message-store="messageStore3"/>
 
-	<int:channel id="aggChannel" />
+	<int:channel id="aggChannel"/>
 
 	<int:channel id="discards">
-		<int:queue />
+		<int:queue/>
 	</int:channel>
 
 </beans>

spring-integration-file/src/test/java/org/springframework/integration/file/FileWritingMessageHandlerTests.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2022 the original author or authors.
+ * Copyright 2002-2024 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -543,6 +543,7 @@ public void noFlushAppend() throws Exception {
 		}
 		assertThat(flushes.get()).isGreaterThanOrEqualTo(2);
 		handler.stop();
+		taskScheduler.destroy();
 	}
 
 	@Test
@@ -586,6 +587,7 @@ protected BufferedOutputStream createOutputStream(File fileToWriteTo, boolean ap
 		verify(out).write(any(byte[].class), anyInt(), anyInt());
 		assertThat(closeWhileWriting.get()).isFalse();
 		handler.stop();
+		taskScheduler.destroy();
 	}
 
 	@Test