Upgrade to MQTT Paho 1.2.2

- fix mock tests for internal client changes
- reduce stop wait for completion time

**cherry-pick to 5.2.x**

* Remove stack trace from test and convert to assertJ

# Conflicts:
#	build.gradle

Author: garyrussell

build.gradle

@@ -81,7 +81,7 @@ ext {
 	micrometerVersion = '1.3.5'
 	mockitoVersion = '3.2.4'
 	mysqlVersion = '8.0.18'
-	pahoMqttClientVersion = '1.2.0'
+	pahoMqttClientVersion = '1.2.2'
 	postgresVersion = '42.2.9'
 	reactorVersion = 'Dysprosium-SR5'
 	resilience4jVersion = '1.1.0'

spring-integration-mqtt/src/main/java/org/springframework/integration/mqtt/inbound/MqttPahoMessageDrivenChannelAdapter.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2019 the original author or authors.
+ * Copyright 2002-2020 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.
@@ -51,15 +51,19 @@
 public class MqttPahoMessageDrivenChannelAdapter extends AbstractMqttMessageDrivenChannelAdapter
 		implements MqttCallback, ApplicationEventPublisherAware {
 
-	public static final long DEFAULT_COMPLETION_TIMEOUT = 30000L;
+	public static final long DEFAULT_COMPLETION_TIMEOUT = 30_000L;
 
-	private static final int DEFAULT_RECOVERY_INTERVAL = 10000;
+	public static final long STOP_COMPLETION_TIMEOUT = 5_000L;
+
+	private static final int DEFAULT_RECOVERY_INTERVAL = 10_000;
 
 	private final MqttPahoClientFactory clientFactory;
 
 	private int recoveryInterval = DEFAULT_RECOVERY_INTERVAL;
 
-	private volatile long completionTimeout = DEFAULT_COMPLETION_TIMEOUT;
+	private long completionTimeout = DEFAULT_COMPLETION_TIMEOUT;
+
+	private long stopCompletionTimeout = STOP_COMPLETION_TIMEOUT;
 
 	private volatile IMqttClient client;
 
@@ -122,6 +126,16 @@ public void setCompletionTimeout(long completionTimeout) {
 		this.completionTimeout = completionTimeout;
 	}
 
+	/**
+	 * Set the completion timeout wnen stopping. Not settable using the namespace.
+	 * Default {@value #STOP_COMPLETION_TIMEOUT} milliseconds.
+	 * @param completionTimeout The timeout.
+	 * @since 5.2.5
+	 */
+	public void setStopCompletionTimeout(long completionTimeout) {
+		this.stopCompletionTimeout = completionTimeout;
+	}
+
 	/**
 	 * The time (ms) to wait between reconnection attempts.
 	 * Default {@value #DEFAULT_RECOVERY_INTERVAL}.
@@ -170,7 +184,7 @@ protected synchronized void doStop() {
 				logger.error("Exception while unsubscribing", e);
 			}
 			try {
-				this.client.disconnectForcibly(this.completionTimeout);
+				this.client.disconnectForcibly(this.stopCompletionTimeout);
 			}
 			catch (MqttException e) {
 				logger.error("Exception while disconnecting", e);

spring-integration-mqtt/src/test/java/org/springframework/integration/mqtt/MqttAdapterTests.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2019 the original author or authors.
+ * Copyright 2002-2020 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.
@@ -17,10 +17,12 @@
 package org.springframework.integration.mqtt;
 
 import static org.assertj.core.api.Assertions.assertThat;
+import static org.assertj.core.api.Assertions.assertThatExceptionOfType;
 import static org.assertj.core.api.Assertions.fail;
 import static org.mockito.ArgumentMatchers.any;
 import static org.mockito.ArgumentMatchers.anyLong;
 import static org.mockito.ArgumentMatchers.anyString;
+import static org.mockito.ArgumentMatchers.isNull;
 import static org.mockito.BDDMockito.given;
 import static org.mockito.BDDMockito.willAnswer;
 import static org.mockito.BDDMockito.willReturn;
@@ -48,8 +50,10 @@
 
 import org.aopalliance.intercept.MethodInterceptor;
 import org.apache.commons.logging.Log;
+import org.assertj.core.api.Condition;
 import org.eclipse.paho.client.mqttv3.IMqttAsyncClient;
 import org.eclipse.paho.client.mqttv3.IMqttClient;
+import org.eclipse.paho.client.mqttv3.IMqttMessageListener;
 import org.eclipse.paho.client.mqttv3.IMqttToken;
 import org.eclipse.paho.client.mqttv3.MqttAsyncClient;
 import org.eclipse.paho.client.mqttv3.MqttCallback;
@@ -435,11 +439,13 @@ public void testSubscribeFailure() throws Exception {
 		new DirectFieldAccessor(client).setPropertyValue("aClient", aClient);
 		willAnswer(new CallsRealMethods()).given(client).connect(any(MqttConnectOptions.class));
 		willAnswer(new CallsRealMethods()).given(client).subscribe(any(String[].class), any(int[].class));
+		willAnswer(new CallsRealMethods()).given(client).subscribe(any(String[].class), any(int[].class),
+				(IMqttMessageListener[]) isNull());
 		willReturn(alwaysComplete).given(aClient).connect(any(MqttConnectOptions.class), any(), any());
 
 		IMqttToken token = mock(IMqttToken.class);
 		given(token.getGrantedQos()).willReturn(new int[] { 0x80 });
-		willReturn(token).given(aClient).subscribe(any(String[].class), any(int[].class), any(), any());
+		willReturn(token).given(aClient).subscribe(any(String[].class), any(int[].class), isNull(), isNull(), any());
 
 		MqttPahoMessageDrivenChannelAdapter adapter = new MqttPahoMessageDrivenChannelAdapter("foo", "bar", factory,
 				"baz", "fix");
@@ -449,15 +455,12 @@ public void testSubscribeFailure() throws Exception {
 			method.set(m);
 		}, m -> m.getName().equals("connectAndSubscribe"));
 		assertThat(method.get()).isNotNull();
-		try {
-			method.get().invoke(adapter);
-			fail("Expected InvocationTargetException");
-		}
-		catch (InvocationTargetException e) {
-			assertThat(e.getCause()).isInstanceOf(MqttException.class);
-			assertThat(((MqttException) e.getCause()).getReasonCode())
-					.isEqualTo((int) MqttException.REASON_CODE_SUBSCRIBE_FAILED);
-		}
+		Condition<InvocationTargetException> subscribeFailed = new Condition<>(ex ->
+			((MqttException) ex.getCause()).getReasonCode() == MqttException.REASON_CODE_SUBSCRIBE_FAILED,
+			"expected the reason code to be REASON_CODE_SUBSCRIBE_FAILED");
+		assertThatExceptionOfType(InvocationTargetException.class).isThrownBy(() -> method.get().invoke(adapter))
+			.withCauseInstanceOf(MqttException.class)
+			.is(subscribeFailed);
 	}
 
 	@Test
@@ -485,11 +488,13 @@ public void testDifferentQos() throws Exception {
 		new DirectFieldAccessor(client).setPropertyValue("aClient", aClient);
 		willAnswer(new CallsRealMethods()).given(client).connect(any(MqttConnectOptions.class));
 		willAnswer(new CallsRealMethods()).given(client).subscribe(any(String[].class), any(int[].class));
+		willAnswer(new CallsRealMethods()).given(client).subscribe(any(String[].class), any(int[].class),
+				(IMqttMessageListener[]) isNull());
 		willReturn(alwaysComplete).given(aClient).connect(any(MqttConnectOptions.class), any(), any());
 
 		IMqttToken token = mock(IMqttToken.class);
 		given(token.getGrantedQos()).willReturn(new int[] { 2, 0 });
-		willReturn(token).given(aClient).subscribe(any(String[].class), any(int[].class), any(), any());
+		willReturn(token).given(aClient).subscribe(any(String[].class), any(int[].class), isNull(), isNull(), any());
 
 		MqttPahoMessageDrivenChannelAdapter adapter = new MqttPahoMessageDrivenChannelAdapter("foo", "bar", factory,
 				"baz", "fix");
@@ -506,6 +511,10 @@ public void testDifferentQos() throws Exception {
 		verify(logger, atLeastOnce())
 				.warn("Granted QOS different to Requested QOS; topics: [baz, fix] requested: [1, 1] granted: [2, 0]");
 		verify(client).setTimeToWait(30_000L);
+
+		new DirectFieldAccessor(adapter).setPropertyValue("running", Boolean.TRUE);
+		adapter.stop();
+		verify(client).disconnectForcibly(5_000L);
 	}
 
 	private MqttPahoMessageDrivenChannelAdapter buildAdapterIn(final IMqttClient client, Boolean cleanSession,