Remove Exception from IOS.onInit()

Author: garyrussell

spring-integration-amqp/src/main/java/org/springframework/integration/amqp/channel/AbstractAmqpChannel.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2017 the original author or authors.
+ * Copyright 2002-2018 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.
@@ -35,6 +35,7 @@
 /**
  * @author Mark Fisher
  * @author Artem Bilan
+ * @author Gary Russell
  *
  * @since 2.1
  */
@@ -207,7 +208,7 @@ protected ConnectionFactory getConnectionFactory() {
 	}
 
 	@Override
-	protected void onInit() throws Exception {
+	protected void onInit() {
 		super.onInit();
 		if (!this.initialized && this.rabbitTemplate != null) {
 			if (this.connectionFactory != null) {

spring-integration-amqp/src/main/java/org/springframework/integration/amqp/channel/AbstractSubscribableAmqpChannel.java

@@ -160,7 +160,7 @@ public boolean unsubscribe(MessageHandler handler) {
 	}
 
 	@Override
-	public void onInit() throws Exception {
+	public void onInit() {
 		super.onInit();
 		this.dispatcher = this.createDispatcher();
 		if (this.maxSubscribers == null) {

spring-integration-amqp/src/main/java/org/springframework/integration/amqp/channel/PollableAmqpChannel.java

@@ -138,7 +138,7 @@ protected String getRoutingKey() {
 	}
 
 	@Override
-	protected void onInit() throws Exception {
+	protected void onInit() {
 		AmqpTemplate amqpTemplate = getAmqpTemplate();
 		if (this.queue == null) {
 			if (getAdmin() == null && amqpTemplate instanceof RabbitTemplate) {

spring-integration-amqp/src/main/java/org/springframework/integration/amqp/inbound/AmqpInboundGateway.java

@@ -182,7 +182,7 @@ public String getComponentType() {
 	}
 
 	@Override
-	protected void onInit() throws Exception {
+	protected void onInit() {
 		if (this.retryTemplate != null) {
 			Assert.state(getErrorChannel() == null, "Cannot have an 'errorChannel' property when a 'RetryTemplate' is "
 					+ "provided; use an 'ErrorMessageSendingRecoverer' in the 'recoveryCallback' property to "

spring-integration-core/src/main/java/org/springframework/integration/aggregator/AbstractCorrelatingMessageHandler.java

@@ -311,7 +311,7 @@ public void setApplicationEventPublisher(ApplicationEventPublisher applicationEv
 	}
 
 	@Override
-	protected void onInit() throws Exception {
+	protected void onInit() {
 		super.onInit();
 		Assert.state(!(this.discardChannelName != null && this.discardChannel != null),
 				"'discardChannelName' and 'discardChannel' are mutually exclusive.");

spring-integration-core/src/main/java/org/springframework/integration/channel/AbstractMessageChannel.java

@@ -352,7 +352,7 @@ public ManagementOverrides getOverrides() {
 	}
 
 	@Override
-	protected void onInit() throws Exception {
+	protected void onInit() {
 		super.onInit();
 		if (this.messageConverter == null) {
 			if (getBeanFactory() != null) {

spring-integration-core/src/main/java/org/springframework/integration/channel/DefaultHeaderChannelRegistry.java

@@ -118,7 +118,7 @@ public final int size() {
 	}
 
 	@Override
-	protected void onInit() throws Exception {
+	protected void onInit() {
 		super.onInit();
 		Assert.notNull(getTaskScheduler(), "a task scheduler is required");
 	}

spring-integration-core/src/main/java/org/springframework/integration/channel/DirectChannel.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2014 the original author or authors.
+ * Copyright 2002-2018 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.
@@ -82,7 +82,7 @@ protected UnicastingDispatcher getDispatcher() {
 	}
 
 	@Override
-	protected void onInit() throws Exception {
+	protected void onInit() {
 		super.onInit();
 		if (this.maxSubscribers == null) {
 			Integer maxSubscribers = this.getIntegrationProperty(IntegrationProperties.CHANNELS_MAX_UNICAST_SUBSCRIBERS, Integer.class);

spring-integration-core/src/main/java/org/springframework/integration/channel/ExecutorChannel.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2016 the original author or authors.
+ * Copyright 2002-2018 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.
@@ -98,7 +98,7 @@ protected UnicastingDispatcher getDispatcher() {
 	}
 
 	@Override
-	public final void onInit() throws Exception {
+	public final void onInit() {
 		Assert.state(getDispatcher().getHandlerCount() == 0, "You cannot subscribe() until the channel "
 				+ "bean is fully initialized by the framework. Do not subscribe in a @Bean definition");
 		super.onInit();

spring-integration-core/src/main/java/org/springframework/integration/channel/PublishSubscribeChannel.java

@@ -126,10 +126,9 @@ public void setMinSubscribers(int minSubscribers) {
 
 	/**
 	 * Callback method for initialization.
-	 * @throws Exception the exception.
 	 */
 	@Override
-	public final void onInit() throws Exception {
+	public final void onInit() {
 		super.onInit();
 		if (this.executor != null) {
 			Assert.state(getDispatcher().getHandlerCount() == 0,