Pavel Bucek's Weblog

  • May 16, 2014

Tyrus 1.6

I’m pleased to announce that Tyrus 1.6 was released this week and there are some nice features and bugfixes in this release, so let me introduce most important ones.

What’s new?

First bigger addition is JDK Client Transport. We used exclusively Grizzly framework for handling transport layer on the client side and now we provide an option to switch to JDK 1.7 based transport. Main advantage of it is reduced size and number of jar files. The default transport is still based on Grizzly, so if you want to try JDK 1.7 AIO, you need to enable it explicitly. See JDK 7 client chapter in Tyrus documentation for more details. This feature was implemented by Petr Janouch, new Tyrus team member.

Another important feature is monitoring server side resource utilisation and exposing this info as statistics via JMX beans. Currently available statistics are mostly about number and type of received and send messages, also there is higher level part which provides list of deployed endpoints and number of concurrent connected clients. If you want to try this out, see JMX Monitoring chapter in Tyrus user guide for configuration details. This feature was also contributed by Petr.

Next in line is change related to an issue in JSR 356. Current version of Session interface does allow use of Lambda expressions when registering a message handler, but it does not work as expected. Problem is, that it just cannot work. The API forces implementation to get the generic type information during runtime, which is not always available (in Java). Most usecases do work fine, but one doesn’t – when the anonymous class implementation is replaced by Lambda expression, type information is lost. Tyrus now implements proposed solution, but to be able to access mentioned methods, you need to cast Session to TyrusSession. Then you need to provide type of the message handler (java.lang.Class) and the handler itself – since the type info is now separated, there is no need to get it from the message handler instance , thus it will work with any representation. We are working on porting this fix to the WebSocket API, stay tuned for more details.

Last and in this case maybe least feature is WSADL. Don’t worry if you don’t know what that is – nobody does :). WSADL is XML (for now) descriptor of deployed application, currently providing only set of deployed endpoints (mainly because other information, like registered message handlers, is not that easy to get before client connects to the endpoint and can vary per Session). WSADL stands for WebSocket Application Descriptor Language and it is supposed to be the same as WADL is for RESTful webservices and WSDL for SOAP webservices. In case you want to test this feature, enableWSADL_SUPPORT (or see the test) and GET /contextPath/application.wsadl on your deployed Tyrus application.

Complete list of changes

TYRUS-301 Custom String encoder is not used
TYRUS-305 Add support for multiple client container to TestContainer
TYRUS-311 Session timeout on client does not work when set in onOpen method
TYRUS-312 TyrusFuture.get(long,TimeUnit) does not honor Future.get(long,TimeUnit) contract
TYRUS-293 Automatic heartbeat PING
TYRUS-259 Should produce a warning during deployment when OnMessage#maxMessageSize is larger than the value of org.glassfish.tyrus.servlet.incoming-buffer-size
TYRUS-308 JDK Client transport – SSL support
TYRUS-309 JDK Client transport – Proxy support
TYRUS-318 Writer returned from BasicRemote.getSendWriter() throws NPE when flush is called more than once.
TYRUS-314 Create WADL-like descriptor per deployed app
TYRUS-317 Allow server configuration using WebSocketContainer or WebSocketAddOn
TYRUS-302 Java 8 Lambda
TYRUS-214 Expose monitoring API/statistics
TYRUS-299 Missing tyrus-container-grizzly-server in the release package WebSocket RI archive
TYRUS-233 Provide client transport based on plain JDK
TYRUS-310 When max idle timeout is reset to 0, every received message or sent ping or pong causes an empty task to be scheduled and executed


If you have any questions or comments or if you want to discuss anything related to Tyrus, easiest way to contact us is via users@tyrus.java.net mailing list.

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