Changes between 3.0 and 4.0
See the Migration Guide for important changes that might affect your applications. You can find migration guides for all versions back to 2.1 on the wiki.
New Components
Version 4.0 added a number of new components.
MQTT Channel Adapters
The MQTT channel adapters (previously available in the Spring Integration Extensions repository) are now available as part of the normal Spring Integration distribution. See MQTT Support.
@EnableIntegration
We added the @EnableIntegration
annotation to permit declaration of standard Spring Integration beans when using @Configuration
classes.
See Annotation Support for more information.
@IntegrationComponentScan
We added the @IntegrationComponentScan
annotation to permit classpath scanning for Spring Integration-specific components.
See Annotation Support for more information.
“@EnableMessageHistory”
You can now enable message history with the @EnableMessageHistory
annotation in a @Configuration
class.
In addition, a JMX MBean can modify the message history settings.
Also, MessageHistory
can track auto-created MessageHandler
instances for annotated endpoints (such as @ServiceActivator
, @Splitter
, and others).
For more information, see Message History.
@MessagingGateway
You can now configure messaging gateway interfaces with the @MessagingGateway
annotation.
It is an analogue of the <int:gateway/>
XML element.
For more information, see @MessagingGateway
Annotation.
Spring Boot @EnableAutoConfiguration
As well as the @EnableIntegration
annotation mentioned earlier, we introduced a hook to allow the Spring Integration infrastructure beans to be configured with Spring Boot’s @EnableAutoConfiguration
annotation.
For more information, see “Auto-configuration” in the Spring Boot Reference Guide.
@GlobalChannelInterceptor
As well as the @EnableIntegration
annotation mentioned above, we introduced the @GlobalChannelInterceptor
annotation.
For more information, see Annotation Support.
@IntegrationConverter
We introduced the @IntegrationConverter
annotation as an analogue of the <int:converter/>
component.
For more information, see Annotation Support.
@EnablePublisher
We added the @EnablePublisher
annotation to allow the specification of a default-publisher-channel
for @Publisher
annotations.
See Annotation Support for more information.
Redis Channel Message Stores
We added a Redis MessageGroupStore
that is optimized for use when backing a QueueChannel
for persistence.
For more information, see Redis Channel Message Stores.
We added a Redis ChannelPriorityMessageStore
.
You can use it to retrieve messages by priority.
For more information, see Redis Channel Message Stores.
MongodDB Channel Message Store
The MongoDB support now provides the MongoDbChannelMessageStore
, which is a channel-specific MessageStore
implementation.
With priorityEnabled = true
, you can use it in <int:priority-queue>
elements to achieve priority order polling of persisted messages.
For more information see MongoDB Channel Message Store.
@EnableIntegrationMBeanExport
You can now enable the IntegrationMBeanExporter
with the @EnableIntegrationMBeanExport
annotation in a @Configuration
class.
For more information, see MBean Exporter.
ChannelSecurityInterceptorFactoryBean
ChannelSecurityInterceptorFactoryBean
now supports configuration of Spring Security for message channels that use @Configuration
classes.
For more information, see Security in Spring Integration.
Redis Command Gateway
The Redis support now provides the <outbound-gateway>
component to perform generic Redis commands by using the RedisConnection#execute
method.
For more information, see Redis Outbound Command Gateway.
RedisLockRegistry
The RedisLockRegistry
is now available to support global locks visible to multiple application instances and servers.
These can be used with aggregating message handlers across multiple application instances such that group release occurs on only one instance.
For more information, see Redis Lock Registry and Aggregator.
@Poller
Annotation-based messaging configuration can now have a poller
attribute.
This means that methods annotated with @ServiceActivator
, @Aggregator
, and similar annotations can now use an inputChannel
that is a reference to a PollableChannel
.
For more information, see Annotation Support.
@InboundChannelAdapter
and SmartLifecycle
for Annotated Endpoints
We added the @InboundChannelAdapter
method annotation.
It is an analogue of the <int:inbound-channel-adapter>
XML component.
In addition, all messaging annotations now provide SmartLifecycle
options.
For more information, see Annotation Support.
Twitter Search Outbound Gateway
We added a new twitter endpoint: <int-twitter-search-outbound-gateway/>
.
Unlike the search inbound adapter, which polls by using the same search query each time, the outbound gateway allows on-demand customized queries.
For more information, see Spring Integration Social Twitter.
@BridgeFrom
and @BridgeTo
Annotations
We introduced @BridgeFrom
and @BridgeTo
@Bean
method annotations to mark MessageChannel
beans in @Configuration
classes.
For more information, see Annotation Support.
Meta-messaging Annotations
Messaging annotations (@ServiceActivator
, @Router
, @MessagingGateway
, and others) can now be configured as meta-annotations for user-defined messaging annotations.
In addition, the user-defined annotations can have the same attributes (inputChannel
, @Poller
, autoStartup
, and others).
For more information, see Annotation Support.
General Changes
This section describes general changes from version 3.0 to version 4.0.
Requires Spring Framework 4.0
We moved the core messaging abstractions (Message
, MessageChannel
, and others) to the Spring Framework spring-messaging
module.
Developers who reference these classes directly in their code need to make changes, as described in the first section of the 3.0 to 4.0 Migration Guide.
Header Type for XPath Header Enricher
We introduced the header-type
attribute for the header
child element of the <int-xml:xpath-header-enricher>
.
This attribute provides the target type for the header value (to which the result of the XPath expression evaluation is converted).
For more information see XPath Header Enricher.
Object To JSON Transformer: Node Result
We introduced the result-type
attribute for the <int:object-to-json-transformer>
.
This attribute provides the target type for the result of mapping an object to JSON.
It supports STRING
(the default) and NODE
.
For more information see Since version 3.0, Spring Integration also provides a built-in #xpath
SpEL function for use in expressions..
JMS Header Mapping
The DefaultJmsHeaderMapper
now maps an incoming JMSPriority
header to the Spring Integration priority
header.
Previously, priority
was only considered for outbound messages.
For more information, see Mapping Message Headers to and from JMS Message.
JMS Outbound Channel Adapter
The JMS outbound channel adapter now supports the session-transacted
attribute (default: false
).
Previously, you had to inject a customized JmsTemplate
to use transactions.
See Outbound Channel Adapter.
JMS Inbound Channel Adapter
The JMS inbound channel adapter now supports the session-transacted
attribute (default: false
).
Previously, you had to inject a customized JmsTemplate
to use transactions.
The adapter allowed 'transacted' in the acknowledgeMode
, which was incorrect and didn’t work.
This value is no longer allowed.
See Inbound Channel Adapter.
Datatype Channels
You can now specify a MessageConverter
to be used when converting (if necessary) payloads to one of the accepted datatype
instances in a Datatype channel.
For more information, see Datatype Channel Configuration.
Simpler Retry Advice Configuration
We added simplified namespace support to configure a RequestHandlerRetryAdvice
.
For more information, see Configuring the Retry Advice.
Correlation Endpoint: Time-based Release Strategy
We added the mutually exclusive group-timeout
and group-timeout-expression
attributes to <int:aggregator>
and <int:resequencer>
.
These attributes allow forced completion of a partial MessageGroup
, provided the ReleaseStrategy
does not release a group and no further messages arrive within the time specified.
For more information, see Configuring an Aggregator with XML.
Redis Metadata Store
The RedisMetadataStore
now implements ConcurrentMetadataStore
, letting it be used, for example, in an AbstractPersistentAcceptOnceFileListFilter
implementation in a multiple application instance or server environment.
For more information, see Redis Metadata Store, Reading Files, FTP Inbound Channel Adapter, and SFTP Inbound Channel Adapter.
JdbcChannelMessageStore
and PriorityChannel
T`JdbcChannelMessageStore` now implements PriorityCapableChannelMessageStore
, letting it be used as a message-store
reference for priority-queue
instances.
For more information, see Backing Message Channels.
AMQP Endpoints Delivery Mode
Spring AMQP, by default, creates persistent messages on the broker.
You can override this behavior by setting the amqp_deliveryMode
header or customizing the mappers.
We added a convenient default-delivery-mode
attribute to the adapters to provide easier configuration of this important setting.
For more information, see Outbound Channel Adapter and Outbound Gateway.
FTP Timeouts
The DefaultFtpSessionFactory
now exposes the connectTimeout
, defaultTimeout
, and dataTimeout
properties, avoiding the need to subclass the factory to set these common properties.
The postProcess*
methods are still available for more advanced configuration.
See FTP Session Factory for more information.
Twitter: StatusUpdatingMessageHandler
The StatusUpdatingMessageHandler
(<int-twitter:outbound-channel-adapter>
) now supports the tweet-data-expression
attribute to build a org.springframework.social.twitter.api.TweetData
object for updating the timeline status.
This feature allows, for example, attaching an image.
See Spring Integration Social Twitter for more information.
JPA Retrieving Gateway: id-expression
We introduced the id-expression
attribute for <int-jpa:retrieving-outbound-gateway>
to perform EntityManager.find(Class entityClass, Object primaryKey)
.
See Retrieving Outbound Gateway for more information.
TCP Deserialization Events
When one of the standard deserializers encounters a problem decoding the input stream to a message, it now emits a TcpDeserializationExceptionEvent
, letting applications examine the data at the point at which the exception occurred.
See TCP Connection Events for more information.
Messaging Annotations on @Bean
Definitions
You can now configure messaging annotations (@ServiceActivator
, @Router
, @InboundChannelAdapter
, and others) on @Bean
definitions in @Configuration
classes.
For more information, see Annotation Support.