Camel 2.16.0 release (currently in progress)
New and Noteworthy
Welcome to the 2.16.0 release which approx XXX issues resolved (new features, improvements and bug fixes such as...)
Noteworthy improvements:
- The route models (definition classes) preserve property placeholders, which allows round trip editing, and also prevents showing potential sensitive information
- Added onPrepareFailure option to Dead Letter Channel to allow a custom processor to prepare the Exchange before sending to the dead letter queue.
- MongoDB tailable consumers now allow setting the
readPreference
option. - Using setFaultBody / setFaultHeader behaves similar to setBody / setHeader to preserve existing headers/attachments by setting on existing IN or OUT message.
- Java DSL using choice with end vs endChoice now validates you use them as intended. Any misconfiguration now throws an exception explaining the problem.
- POJO Producing and POJO Consuming lifecycle is now in sync with CamelContext which ensures it works as similar to Camel Routes does. Also the created producer/consumer is stopped when CamelContext is stopping to cleanup properly.
- JMS component now allows configuring concurrentConsumers/maxConcurrentConsumers separately between from(jms) vs to(jms) using request/reply over JMS
- Added SEARCH operation to Elasticsearch component
- The Properties component (property placeholder) now supports an encoding option to allow reading the .properties files using a specific charset such as UTF-8. By default ISO-8859-1 is used (latin1)
- Added
receviveBufferSize
option to the FTP component to make download faster. The size is by default 32kb buffer. - The Aggregator2 EIP now allows an external source using a
AggregateController
to control the aggregator, such as for forcing completing a group or all groups, or query runtime information from the aggregator. A default controller is provided out of the box if none has been configured. - The Aggregator2 now enlists in JMX using a
ManagedAggregateProcessorMBean
which has more information, and also allows using the aggregate controller to control it. - The Aggregator2 now includes more runtime statistics which can be accessed from Java and JMX about number of incoming and completed exchanges, and per different completion triggers.
- The Aggregator2 now supports pre-completion mode if the aggregation strategy implements
PreCompletionAwareAggregationStrategy
. This supports the use-case where an incoming Exchange are used to determine if the current aggregated group is completed or not. If completed the group is emitted as-is, and the new incoming Exchange is used to start a new group from scratch. - Added options to Mail consumer so it can skip or handle a mail message that cannot be read from the mail server in the batch; and then move on to read the next message. This ensures the consumer can deal with mail boxes that has problematic mails that otherwise will cause no mails to be retrieve by the consumer in the batch.
- The runtime route processors and their corresponding model definition are now linked by their id using
HasId
, so its easier to obtain the processor or model definition from thegetProcessor(id)
andgetProcessorDefintion(id)
api on CamelContext. - CamelContext now also includes a getManagedProcessor API to easily get the mbean client api for the processor, so you can access the runtime JMX statistics from Java code.
- Spring Boot applications now block the main thread of the execution
- Spring Boot automagically loads XML routes definitions from classpath
- Added
MainListener
to make it easier for Camel Boot / Standalone Camel to implement custom logic to trigger during the starting and stopping of the application. - Camel Jackson now provides
Map
toObject
converter - Ability to refer to existing hazelcast instance by id, using Hazelcast Component
- Direct and Direct-VM now supports the failIfNoConsumers option
- Making it easier to add custom Type Converter to your Camel applications without having to use the META-INF file. In Spring or Blueprint just add them as <bean>s. See more details at Type Converter documentation.
- camel-cxf PAYLOAD supports stream cache out of box.
BridgePropertyPlaceholderConfigurer
supports to handle the jasypt encryption inside and outside of the camelContext.The camel-aws component now support Amazon DynamoDB version 2
The Wire Tap eip now also emits event notifications when sending the Exchange to the wire tap destination
- Camel Test has new option isDumpRouteStats that dumps all route usage statistics as XML files in target/camel-route-stats directory, which can be used to inspect "route coverage" reports.
- Now Camel Netty component doesn't intercept consumers with
httpMethodRestrict=OPTIONS
- Now Netty HTTP resolves OPTIONS prefix matches earlier
- Using Load Balancer with Java DSL now builds the route model using the specific model types, which renders a more accurate route model
- Enhanced the PredicateBuilder to support vargs and list in the "or" builder method
- Using custom
HttpBinding
with HTTP and HTTP4 is now easier as they can be instantiated using a default no-arg constructor - Added
readLock=idempotent
to the File2 consumer which allows to reuse an idempotent repository as read-lock which enables Camel to run reliable in clustered mode, where each node competes for the same files from a shared file system. This requires that the idempotent repository supports clustering such as Hazelcast Component or Infinispan - or using the JDBC for a shared database table. - Camel RX now ensures that observe and subscribe are done within an unit of work to ensure on completions is executed, such as they are done when you use regular Camel routes.
- The JMS component now includes the underlying
javax.jms.Session
instance on the Camel message which allows end users to easier to use client acknowledge mode, in case the client wants to use the session to call recover or rollback.
Fixed the following issues:
- File language now properly supports file extensions having double dots, such as .tar.gz
- Fixed issue with doTry not stopping routing if a fault message was set using setFaultBody within the doTry.
- Fixed Bean language to support end parenthesis in quoted string literals as part of method parameters, and not as end of method signature.
- Fixed FTP2 using
pollEnrich
with disconnect=true and delete=true, would disconnect before deleting the file. Now we disconnect last. - Various EIPs such as Splitter, Recipient List, Multicast no longer reuse message id in their sub messages, but each sub message has its own unique message id (just as the exchange has).
- Fixed an issue with the circuit breaker Load Balancer not honoring the half open after period after an error was detected.
- Fixed FTP2 now calling disconnect if there was no messages to poll, even when disconnect=true configured.
- Fixed Throttler using method call expression in XML DSL was not working
- Fixed stopping a route may stop context scoped OnException that would otherwise send message to an endpoint, now been stopped and an IllegalStateException was thrown while handling the exception.
- Fixed using a Load Balancer from a context scoped onException may double up its processors participating in the balancer per route in the context.
- Fixed
parallelAggregate
on multicast/splitter/recipient list to use a thread pool for running concurrently. - Fixed Stream caching to not delete data that was spooled to disk before both exchanges are done routing.
- Fixed DefaultErrorHandler to use 1 sec redelivery delay out of the box as the other error handlers does.
- Fixed setting
logExhaustedMessageHistory=true
on Dead Letter Channel to log the message history. This option is by default false on DLC as it would be as before (not noisy). - Fixed double refresh of the parent Spring Boot Application Context
New Enterprise Integration Patterns
New Components
- camel-paho - For MQTT messaging using Eclipse Paho client
- camel-pdf - For creating PDF documents
New DSL
New Annotations
New Data Formats
- camel-boon - For mapping POJO to/from json
New Languages
New Examples
New Tutorials
API breaking
org.apache.camel.mode.LoadBalancerDefinition no longer implements org.apache.camel.processor.loadbalancer.LoadBalancer which is the runtime processor (this was never intended).
- The
ref
attribute on<loadBalance>
has been removed, as it has been deprecated for a long time, and you should use a<customLoadBalancer>
to refer to a custom load balancer. - The
copy
method onStreamCache
now takes anExchange
as parameter. - Various APIs in
camel-jms
has been adjusted to support including the JMS session parameter -javax.jms.Session
. Though these API changes are mostly internal facing, and we do not expect end users problems.
Known Issues
Dependency upgrades
- Amazon Web Service Java SDK from 1.8.9.1 to 1.9.34
- Apache JClouds from 1.8.1 to 1.9.0
- Apache Olingo Odata from 2.0.0 to 2.0.3
- Apns from 0.2.3 to 1.0.0.Beta6
- AspectJ from 1.6.2 to 1.8.5
- Async-http-client from 1.9.8 to 1.9.17
- Cassandra from 2.1.2 to 2.1.4
Cassandra Datastax Java Driver from 2.1.2 to 2.1.5
- DNSJava from 2.1.6 to 2.1.7
- Docker-java from 0.10.5 to 1.2.0
- Dropbox core Java SDK from 1.7.6 to 1.7.7
- Dropwizard Metrics from 3.1.0 to 3.1.1
- Ehcache from 2.9.1 to 2.10.0
- Facebook4j from 1.1.12 to 2.2.2
- Freemarker from 2.3.21 to 2.3.22
- Google App Engine from 1.8.3 to 1.9.19
- Gson from 3.2 to 3.2.1
- iCal4j from 1.5.0.2 to 1.6.0
- Infinispan from 6.0.2.Final to 7.1.1.Final
- Jackson2 from 2.4.3 to 2.5.1
- Jsch from 0.1.51 to 0.1.52
- Jsonpath from 1.2.0 to 2.0.0
- Kafka from 0.8.1.1 to 0.8.2.0
- LightCouch from 0.1.3 to 0.1.6
- MongoDB Java Driver from 2.12.4 to 3.0.0
- MongoDB test harness from 1.46.4 to 1.47.2
- Mvel2 from 2.2.1.Final to 2.2.4.Final
- OGNL from 3.0.8 to 3.0.9
- OpenJPA from 2.3.0 to 2.4.0
- Openshift Java Client 2.5.0.Final to 2.7.0.Final
- PDFBox from 1.6.0 to 1.8.9
- Restlet from 2.2.x to 2.3.1
- SLF4J from 1.7.10 to 1.7.12
- Snakeyaml from 1.14 to 1.15
- Spring upgrades
- TestNG from 6.8.8 to 6.8.21
- Twitter4J from 4.0.2 to 4.0.3
- XStream from 1.4.7 to 1.4.8
Important changes to consider when upgrading
- The dumpRoutesAsXml operation now preserve property placeholder used in the route models.
- Using setFaultBody / setFaultHeader behaves similar to setBody / setHeader to preserve existing headers/attachments by setting on existing IN or OUT message.
- If using concurrent consumer on JMS endpoints for request/reply over JMS then you must use the new replyToConcurrentConsumers, replyToMaxConcurrentConsumers options to configure the values.
- When the Aggregator2 is forced completed the exchange property
Exchange.AGGREGATED_COMPLETED_BY
value has been changed from "forceCompletion" to "force" so its named like the other completion triggers. - Removed unsupported modules camel-web and camel-web-standalone.
- Removed unsupported camel:dot functionality from camel:run plugin.
- Removed unsupported camel-archetype-scala-component from maven archetypes.
- The Maven coordinate for linkedin and olingo2 components changed to be aligned like all the others having groupId as just org.apache.camel.
- If using MongoDB component, the option invokeGetLastError doesn't exist anymore. The option invokeGetLastError instructs the MongoDB Java driver to invoke getLastError() after every call. In the 3.0.0 MongoDB driver implementation, the getLastError() method in WriteResult has been removed. So, if needed, use an acknowledged WriteConcern when executing the write operation and then verify the correctness of the operation with the method wasAcknowledged() of WriteResult.
- The Jing component now uses
jing
as schema name in uris, instead ofrng
orrnc
. Those names has been removed.
Getting the Distributions
Binary Distributions
Description | Download Link | PGP Signature file of download |
---|---|---|
Windows Distribution | ||
Unix/Linux/Cygwin Distribution |
The above URLs use redirection
The above URLs use the Apache Mirror system to redirect you to a suitable mirror for your download. Some users have experienced issues with some versions of browsers (e.g. some Safari browsers). If the download doesn't seem to work for you from the above URL then try using FireFox
Source Distributions
Description | Download Link | PGP Signature file of download |
---|---|---|
Source for Windows |
Source for Unix/Linux/Cygwin |
Getting the Binaries using Maven 2
To use this release in your maven project, the proper dependency configuration that you should use in your Maven POM is:
<dependency> <groupId>org.apache.camel</groupId> <artifactId>camel-core</artifactId> <version>2.16.0</version> </dependency>
Changelog
For a more detailed view of new features and bug fixes, see the: