snipsnap-index/JavaOne 2007 Notes 1 JavaOne 2007, May 8-11, approximately 260 sessions 1 Tue. May 8 {anchor:Tue. May 8} 1.1 Get in the Driver's Seat With Java Technology {anchor:Tue. May 8-GS1} - John Gage - Sun Chief Researcher -- The Solio - enables "off the grid on the next" -- Challenge to measure for being carbon neutral -- Small devices are the "vector" of change for human interaction - Rich Green - Sun EVP - Software -- Mobile phones outship PCs 20:1 -- GlassFish now being shipped by 7 companies -- GlassFish transitioning from Enterprise to Media -- Martin Harriman - Ericsson VP Marketing & Business Development -- Sun Java System Communications Application Server -- Ericsson open sourcing IMS -- JSR - Java RTS 2\\ -- RT GC\\ -- Useful in finance, telecom, aviation, industrial controls, etc\\ -- javax.realtime.RealtimeThread\\ -- Anna Ewing - NASDAQ CIO\\ -- Trading system runs on Java\\ -- 150,378 TPS\\ -- Java -> RT Java will be a easy migration\\ -- 70% of HD discs are BluRay\\ -- Tom Hallman - Sony Pictures, VP of Operations, Digital Authoring Center\\ -- BDJ allows more dynamic menus than standard definition TV\\ -- NetBeans - +92% YoY\\ -- Whole new modular design editor\\ -- OpenJDK - truly buildable JDK\\ -- New interim governing board, will create constitution\\ -- TCK will be created for compatibility certification\\ -- GPLv2\\ -- Ubuntu packaging Java 6 and NetBeans\\ -- Java SE 6 focusing on faster download and RT\\ -- Java FX family focusing on tools and component for consumer facing apps\\ -- Java FX Script for RIA, aimed at content professionals\\ - James Gosling - Sun Presented\\ -- Chris Oliver credited with creation from Function over Form (F3) idea\\ -- Runs on every JSE unmodified\\ -- Java FX Mobile - Power of Java SE\\ -- "complete desktop scale environment to mobile"\\ -- Splitting the software/OS from mobile hardware\\ -- Nandini Ramani - Sun FX Core Team - Demonstration\\ -- Runs all SE, ME, and FX Script\\ -- Marco Boerries - Yahoo! SVP\\ -- Demonstrates Yahoo GO! - 200 Million phones\\ -- Open platform for developing (Java FX and ME)\\ - Jonathan Shwartz - Sun CEO and President\\ -- blah blah blah\\ -- Dr. Djibril Diallo - UN\\ -- "Engineers without Borders"\\ -- "create an international device to change the world"\\ -- Scott McNealy - Chairman Co-Founder\\ -- Curriki.org - Free open K-12 education wiki\\ 1.1 Implementing Java EE Applications, Using Enterprise JavaBeans (EJB) 3 Technology: Real-World Tips, Tricks, and New Design Patterns {anchor:TS-4721} - Speaker(s): Fabiane Nardon; Edgar A Silva - Session Bean Pitfalls -- Transaction defaults to REQUIRED, must override otherwise - Exceptions don't auto rollback, only system exceptions, must annotate rollback exceptions - Entity Bean Pitfalls -- Must use @Transient for non persistent fields, otherwise all fields are persistent -- Fetch types, Lazy, Eager, etc, Lazy is default and usually satisfies -- Consider eager loading for view layer - MDB Pitfalls -- Spec says don't throw runtime exception -- So annotate with rollback=true or use programmatic transaction rollback -- PreDestroy callback may not always be invoked - Dependency Injection with @Resource includes env-entry properties from deployment descriptors - Interceptors -- Business validations -- Audit -- Security -- Can use context information -- The deployer can turn on/off and define execution order - Processing Annotation at Runtime -- Example: Build a dynamic eager fetch query -- Detect domain/DB schema deltas and auto evolve the DB - Old Design Patterns to Recycle -- Session Facade --- Still needed to hide the EntityManager details -- Value Object/Data Transfer Object --- Still needed sometimes --- Can reduce lazy loading detached objects -- Fast Lane Reader --- No longer necessary -- Delegate --- Value Diminished -- Value List Handler --- Still useful as there are no inherent paging capabilities with EJB 3.0 - New Design Patterns -- Business Rule Interceptor --- Add interceptor(s) to execute business rules to keep rule logic out of persistence method --- Interceptor can delegate to any rules engine i.e. Drools (JBoss Rules) -- Entity View (New variation of Value Object) --- Create a query that retrieves fewer fields than a complete entity -- Eager Loading Parameter --- Add eager loading alternative methods -- Data Change Observer --- Use lifecycle callback methods on entity beans to notify observers --- Uses @EntityListeners -- Exportable Method --- Relevant to SOA --- Use the @WebMethod annotation on a method that exports an XML marshaler method -- Exportable Service Broker --- Relevant to SOA --- Exporting app to web services, a single view of exported app services --- Proviles a simple signature, ease of dependency injection for EJB implementations, etc. 1.1 Evolutionary Java Technology: A Look Forward at the Future of the Platform - Bob Brewin - Sun CTO, Distinguished Engineer - Talked about history of UI and the motivations for JavaFX - Gave analogy of "Positive Stability" with aeronautics - Historical created code and rich interactivity are the two dynamic forces that keep the evolution of UI work oscillating. - Danny Coward - Java SE Platform Lead - Java SE 6 Additions -- WS Stack -- Scripting -- GUI Enhancements -- Tools API --- Compiler Access --- Annotation Access - Java SE 6 JDK Additions -- Diagnostic Tools to attach on demand -- Heap Analysis Tool -- Co-bundled JDBC DB (Apache Derby) -- Improved Swing Fidelity (More Pixel Perfect, More native feel on Windows) - Java SE 6 is faster on both Server and Client - Java SE 7 -- Modularization --- Development related, the concept of a Super Package --- Deployment related, the concept of a Super Jar --- Focus on interoperability with existing formats (i.e. OSGi) -- Multiple Language Support --- First class support for other languages --- scripting.dev.java.net --- new bytecode --- Charlie Nutter and Tor Norbye --- JRuby demo on Mephisto blogging application --- JRuby NetBeans 6 demo -- Working on a "Consumer" JRE to reduce download size --- Modularization of JRE, a core with parallel download of extra modules - Arun Gupta -- jMaki, Wrapper for AJAX components -- Phobos, Serverside AJAX components -- JSON data format and jMaki/Phobos support in NetBeans -- NetBeans seamless debug support for both JavaScript and Java - Jerome Dochez -- GlassFish v3 --- 100k Kernel (HK2) --- 463ms startup - lazily loads modules (demo started in 1.3s with a web app) --- One classloader per module --- GlassFish can be embedded to support the concept of the "synchronized web" --- David van Couvering blogged about this concept in relation to Derby --- Patrick Hogan - NASA Program Manager for the Planetary Visualizer --- Geospatial Browser - OSS Java based, Ken Russell - Sun Principal Investigator --- I3 Donated the image data - $250k just for internal use license --- There is a NetBeans matisse builder for WorldWind components --- F-16 Flight Simulator - GL Studio, DSTI Corp --- http://worldwind.arc.nasa.gov -- IRIS Project --- http://swinglabs.org/iris -- Java FX Pad, lightweight development tools is freely bundled 1.1 Java Puzzlers, Episode VI: The Phantom-Reference Menace/Attack of the Clone/Revenge of the Shift - Speaker(s): Joshua Bloch; William Pugh - URL equals() and hashcode() are broken use URI instead - Don't use URL as a Set or Map key - Testing threads with JUnit is a false sense of security - Class initialization is always in textual order - The only "compile-time" constants are primitives and Strings - Never use Boolean (Wrapper) as a return for ternary operations - InputStream.skip() doesn't guarantee skip, wrap it - Math.abs doesn't guarantee nonnegative result - ? : operation doesn't deal nicely with different wrapper types - widening behavior in primitive types can be dangerous 1.1 Closures for the Java Programming Language - Speaker(s): Neil Gafter - Goals -- Concise "function" literals without the pain of anonymous inner classes -- Interoperability with existing APIs -- Enable control APIs -- Functional and aggregate operations -- Simple but powerful - Syntax and Semantics -- Closure expressions - "ordinary" interface types -- Function types - Signature/Result definition with Exceptions -- Control statements -- Closure conversion turns a closure into an instance of same interface --- This provides interoperability to existing APIs 1.1 JSR 311: The Java API for RESTful Web Services - Speaker(s): Marc Hadley; Paul Sandoz; Roderico Cruz - "You cannot make an API or protocol RESTful" - It is a style of architecture - RPC, few nouns many verbs - REST, many nouns view verbs - Automated content negotiation -- @ProduceMime("application/xml") -- URI Templates to solve repetitive parsing --- @UriTemplate("/artists/{id}") -- POJO implementation --- @HttpMethod --- @UriParam("id") -- HttpResponse Subclasses for standard HTTP response types -- Jerome Duvell is on the expert group, creator of Restlet API -- NetBeans 5.5 will generate JPA entity beans off DB schema --- Generate REST resource classes from these entities 1.1 Modularity in the Next-Generation Java Platform, Standard Edition (Java SE): JSR 277 and JSR 294 - BOF Speaker(s): Kumar Srinivasan, Dave Bristor, Alex Buckley, Stanley Ho - JSR 294 - Super-package language construct (super-package.java) -- Virtual Machine support for access control - JSR 297 - Java Module Distribution Format -- Versioning -- Tooling -- Repositories -- __Issues__ -- Versioning -- Reference to other JARS -- Native Libraries, multiple JARS bundle -- Dual roles: distribution format, and execution format -- Three problems to eliminate, classpath, JAR, extension -- APIs to represent the module system 1 Wed. May 9 1.1 General Session - Oracle - John Gage - Sun, Chief Researcher, Director of Science Office - Thomas Kurian - Oracle, SVP - Oracle Server Technologies, Development -- Jave EE 5, SOA and EDA, Web 2.0, Grid Computing - 4 Trends that will Fundamentally change opps and solutions -- Java EE 5 --- View - JSF, AJAX --- Controller - JSF --- Component Model for UI, Supports rendering Flash, XHTML, WML, SMS --- Model - EJB 3, JPA -- Persistence Platform for Java os'ed as "EclipseLink" project, JSR 227 Data Binding -- Demonstration of Oracle UI components rendering as both Flash and AJAX application -- Declarative Drag and Drop functionality is cool. -- Rich Component Framework donated to Apache (in addition to existing Trinidad) -- Demonstration of Enterprise Mashup functionality for Web 2.0 Development SIP communications with VoIP is pretty slick -- "Web Center Composer" to create mashups on the fly at the client side. -- SCA built on Spring framework, to enable composite applications -- Service Mediator - is an ESB -- Service Orchestration - BPEL, worflow, process manager -- Service Governance - Policy, Failover, SLA, Security, Monitoring, etc -- Demonstration of SOA and SCA development -- Oracle's JEE container is now JEE 5 certified -- Based on Spring and OSGi -- Grid Computing benchmarking world records -- Oracle has now aquired Tangosol Coherence for grid architecture, clustering/availability/scalability -- Automated Management -- Demonstration of Grid Computing -- Cameron Purdy - Tangosol Leading Oracle unit 1.1 Java Technology Generics and Collections: Tools for Productivity - Speakers: Maurice Naftalin; Philip Wadler - Implemented by erasure - Benefits of erasure impl - Design Constraint: Binary for legacy client must link to generified library -- Binaries are the SAME for legacy and generified - Erasure eases evolution - The compiler issues an "unchecked warning" if not using a generified method - Erasure allows legacy and generic clients to co-exist, as binaries interop - Compile time however requires a little more work - Generic client won't compile against the legacy library -- Three options --- Minimal changes (surface generification) --- Stubs (Puts the boundary at the client layer) --- - Compile time only, runtime doesn't use stubs --- Wrappers - not recommended (introduces another layer, above the client) --- - Creates parallel class hierarchies (duplication) --- - Nesting leads to multiple wrapper layers --- - End up with two version - Problems of Erasure -- Parameter types are not reified (thingify, make something concrete), not represented at run-time -- Constructs requiring run-time type information don't work well (or at all) --- Casts and instanceof --- Parametric exceptions don't work because generic type isn't present at runtime --- Problems with arrays --- - Typing system for arrays at run-time doesn't mesh well with erasure --- - No Arrays of Generic Types - The principle of Truth in Advertising - The principle of Indecent Exposure (will be published in the slides) - Reification - Java 7 may or may not still use erasures - Gafter has suggested another language change mechanism - Collections -- Trends in concurrency policy -- JDK 1.0 Synched collection methods -- JDK 1.2 optional java.util synch methods, default unsynched -- J2SE 5 java.util.concurrent (JSR 166) Thread-safe classes designed for concurrent access -- Fail Fast iterators are a stop-gap to aid thread-safety but don't provide it proactively -- Throws ConcurrentModificationException 1.1 Effective Java Reloaded - Speaker(s): Joshua Bloch - Static Factories - New Advantage, Type inference - Static Factories Drawbacks, lots of parameters - Solution - Use the Builder pattern as a static constructor {code} public class NutritionFacts { public static class Builder { public Builder() { this.x = ..; this.y = ..;} public Builder calories(int calories) { this.calories = calories; return ..;} } private NutritionFacts(Builder builder) { <copy data from Builder to NutritionFacts> } } {code} - Generics... -- Avoid Raw Types in New Code {code} // Good Collection<Coin> cc = new ArrayList<Coin>(); // Bad Collection cc = new ArrayList(); {code} -- Don't ignore Compiler Warnings -- Understand each warning -- Eliminate it if possible -- If cannot eliminate only then suppress via @SuppressWarnings("unchecked")\\ -- Limit them as much as possible, declare extra variable if necessary\\ - Use bounded wildcards to increase applicability of APIs {code} void buy(int numToBuy, Collection<? super T> myCollection); void sell(Collection<? extends T> myLot); {code} -- Use <? extends T> when parameterized instance is a T producer ("for read/input") -- Use <? super T> when parameteried instance is a T consumer ("for write/output") -- Use <? T> when reading and writing - Don't confuse bounded wildcards with bounded type variables -- Bounded wildcard - void sell(Collection<? extends T> myLot);\\ - Restrict input parameters, can use super -- Bounded type variables - <T extends Number> T sum(List<T> x) {...} - Restricts action type parameter, can't use super - If a type variable appears only once in a signature, use a wildcard instead - Avoid bounded wildcards in Return Types... don't force it on the client directly - Only library designers should have to think about wildcards - Rarely, you do need to return wildcard types -- List<? extends Number> operands(); // a read-only list of Numbers - Don't overuse wildcards {code} // good public static <T> List<T> longer(List<T> c1, List<T> c2) // bad public static List<?> longer(List<?> c1, List<?> c2) {code} - Use <Void> to clarify intent (non-instantiable) - __Generics and Arrays don't Mix; Prefer Generics__ - Generic array creation error caused by -- new T[SIZE], Set<T>[SIZE], List<String>[SIZE] - Affects varargs(warning rather than error) -- void foo(Class<? extends Thing>... things); - Avoid generic arrays; use List instead -- List<T>, List<Set<T>>, List<List<String>> - Some even say; Avoid arrays altogether - __Cool (Mind Expanding) Pattern - THC - Typesafe Heterogeneous Container__ - Typically, containers are parameterized -- Limits you to a fixed number of type parameters - Sometimes you need more flexibility -- Database rows - You can parameterize selector instead -- Present selector to.. {code} private Map<Class<?>, Object> favorites = new Hashmap<TypeRef<?>, Object>(); public <T> void setFavorite(Class<T> klass, T thing) {} public <T> T getFavorite(Class<T> klass) { return klass.cast(favorites.get(klass)); {code} -- The Solution: Super Type Tokens - Sublass the abstract class TypeRef<T>, then use reflection - Generics are tricky, but they make your code safer and cleaner - Use @Override annotation every time you want to override, makes sure you don't accidentally overload - final is the new private - minimizes mutability, clearly threadsafe - blank finals are fine (i.e. fill in when constructor executes) - watch out for readObject and clone (these can't work with final variables) 1.1 Improving Software Quality with Static Analysis - Speaker(s): William Pugh - All about Findbugs and bug patterns 1.1 Three Approaches to Securing Your JavaServer Faces Technology/Spring/Hibernate Applications - Speaker(s): Ray Lai, Jaya Doraiswamy - JSF pure security implementation can take advantage of the <f:verbatim/> tag - JSF-Security project on sourceforge - Acegi (Spring-Security) -- Use FilterChainProxy ability to delegate to many filters -- SecurityContextHolderAwareFilter -- FilterSecurityInterceptor uses AOP internally - Securing business methods via MethodSecurityInterceptor - Acegi XML configuration is very heavy, this will decrease in future release - Acegi only supports SSO through CAS 1 Thu. May 10 1.1 GlassFish v2 Technical Overview - Speaker(s): Pandey and White - Free for development, deployment, redist - OSI approved CDDL and GPLv2 - V1 included... -- Annotations and POJO based development -- Web Services Management, a unified view -- Self Management and Healing -- Single Instance Offfering to make it easy for developer adoption - V2 includes... -- More "enterprise" ready -- Support for clustering and light-weight session failover -- WSIT - Web Services Interop Technology -- Support for JBI - More ASP, Hosting, Startup adoption - Clustering -- asadmin/admin console uses JMX to talk to DAS -- DAS - Domain Administration Server - considered an administration node -- DAS includes apps, resources, config -- DAS talks JMX to Nodes via a nodeagent -- HA Application State Repository (HttpSession, SSO, SFSB, etc) -- Memory replication or RDBMS -- HADB needed and open-source lighter-weight alternative -- HADB still solid (5 9s) but not OSS and more complex to admin -- Memory replication was chosen for GFv2 instead of HADB -- Feature compatible with HADB -- Each Instance (JVM) replicates to only one other instance -- {1,3}{2,4} -- 1-2, 3-4 across physical server boundaries -- 2 Cases for failover --- Case 1. A Servlet Container would replicate (HTTP Session) to a "replica" cache down the chain of instances using "version control" to identify if load-balancer can trust the data in the replica cache --- Case 2: Instance doesn't have replica data then broadcast (somebody is asking for session 123 who has it?) uses a SASE (self addressed stamped envelope). Broadcast isn't standard multicast UDP, constrained custom protocol. -- Load Balancer is self-monitoring, via IO exceptions, JXTA, etc. Will re-establish when new instances join also. -- Memory Replication out of the Box -- Create a domain (DAS) --- Use the 'cluster' admin profile - defaults for replication are handled --- Enables GMS - heartbeat enabled --- persistence-type = "replicated" -- Create a cluster and instances -- Deploy your app with availability-enabled=true -- That's it -- Increase heap size -- Default is 512MB for cluster admin profile --- To accommodate cluster demos on laptops --- Realistically too small for serious replication -- Add the <distributable/> element --- Required in web.xml --- Indicates you believe your app is ready to run in a cluster --- Makes you think about serialization objects for session state, SFSB state etc. -- Performance --- Cost of Replication --- Hits/Sec ~17-25% throughput degradation, 2k, 4k, 8k session significantly better than HADB -- Based on JXTA and project Shoal/GMS --- JXTA is a peer to peer tech --- Streamlined to handle the high-volume and throughput reqs of memory replicaiton --- Benefited from collaboration with Grizzly project --- JXTA tech group and member abstractions --- Simplified APIs made near zero-config (Cluster-->Group, Member-->Peers) in JXTA terms -- GMS Group Mgmt Service --- Provides dynamic membership, health monitoring, lightweight messaging etc --- GMS is itself based on JXTA --- shoal.dev.java.net - Pluggable Runtime Clustering Framework --- Membership change notifications and cluster state --- Cluster-wide, member to member messaging --- Recovery oriented --- Distributed Cache --- Provides SPI for alternative providers for Group communication --- Used for automatic transaction recovery --- Timer migrations --- Cluster health --- In-mem repl --- IIOP failover load-balancer - WSIT (Project Tango) -- Interop between Java and .NET 3.0/WCF aka Indigo -- JAX-WS RI of WS-* specs from Microsoft -- Optimizing communication -- Reliable messaging -- WS-Security, WS-Trust - JBI (JSR 208) -- Admin through admin console (OpenESB is the JBI runtime) - Others -- Usage Profiles --- Improving user-experience (WAS Profiles, developer versus production etc) --- Canned Dev, Cluster, Enterprise profiles --- V3 will allow custom profiles -- Update Centers --- Runtime or non-runtime additional component installation (GUI based) --- Implemented across two tiers (server for content/catalog, and then GUI) -- Security (JSR 196 Java Auth SPI for Containers) --- ECC (Elliptice Curve Crypto) --- Support for JKS format --- Support for assign-groups in Security-Realm --- JDBC Realm -- Web Container enhancements --- Grizzly based (Async Req Processing -ARP and Comet framework --- Non-blocking SSL --- Apache AJP --- In-memory JSR 199 - style JSP compilations --- All webcontainer aspects are now dynamically reconfigurable (No server restart) --- Alternate docroots for virtual servers and web apps --- Numerous web container startup and req processing optimizations -- New Admin Console --- Using JSF Templating --- jMaki charting --- Ajax, breadcrumbs, trees, etc --- Support for cluster mgmt --- One-step deployment with Server-side browsing --- Integrated JBI admin -- Perf Improvements --- Startups -lazy loading of modules etc --- Asynch web services impl --- EJB container --- ORB --- JMS provider --- Web Container (Grizzly) -- Spec Updates --- JSR 196 (Auth SPI) --- 208 - JBI --- JSF 1.2 MR --- JAX-WS 1.1 Advanced Spring Framework - Speaker(s): Rod Johnson - Announcement Spring just raised 10million in series A VC - Spring Fundamentals -- Core component model -- Services -- Patterns (Recipes) i.e. JdbcTemplate, LdapTemplate, etc -- Integration (Ecosystem) -- Portable (Runs Everywhere) -- Promotes a Universal POJO programming model - Key Enabling Techs make up the Spring Triangle -- DI - Inject Collaborators (pojo business objects) -- AOP - Inject Behavior (Security, Logging, etc.) -- PSA - Portable Service Abstractions (i.e. Transaction Mgmt, etc) - Value-Add: Exporting a remote endpoint - Once spring knows about a component can provide many server side "Exporters" - Value-Add: JMX API Export - Can expose any bean as a JMX API MBean - Aspects can use @Aspect class annotation and @After method annotation etc. - Spring 2.0 uses AspectJ 5 libraries so it is typesafe, uses argument binding - Aspects are extension points for the container -- <aop:aspectj-autoproxy/> will auto apply aspectj annotations - FactoryBean - introduces a level of indirection - BeanPostProcessor - Called on every bean instantiation, a listener to the instantiation of objects - BeanFactoryPostProcessor - Can modify/add bean definitions, new/modify properties etc -- Example: decrypt passwords stored in property files - BeanDefinition - One for every bean definition in the config.xml - Activating a BeanPostProcessor is as easy as declaring a bean for that post-processor - New to 2.0 - custom bean definitions, that is define new XML tags to produce zero or more Spring bean defs -- Example: when multiple beans must always use each other, or always require multiple properties - Acegi will release in 3 weeks a new version that provides custom namespace to reduce the bulky config - The JAX-WS RI now uses Spring as an extension point. - New: -- <jee:jndi-lookup id="dataSource" jndiName="jdbc/StockData"/> -- <util: namespace, etc. - Multiple beans to one custom structure... - Example: <tx:annotation-driven/> - Steps for Authoring Custom Extensions -- Write an XSD to define the element content -- Implement a NamespaceHandler interface, Spring will generate of this marker -- Register in META-INF/spring.handlers -- Import using standard XSD conventions in Spring config.xml - Only use custom namespaces for things you do ALL the time, as it does introduce non-standard complexity for team - Spring 2.1 Stuff -- Released this week (JavaOne) Final in early July -- Allows annotations for config as well as xml @Component class level, @Autowired on instance variables -- @Aspect, @Pointcut, @After, @Before, etc. -- JCA 1.5 support -- Further JPA support -- <context:annotation-scan base-package="demo" /> to filter annotation scanning -- Key difference, annotation configuration is per class whereas xml can also be per instance - Scaling out Spring - Consume objects written in dynamic languages - Scale out through integrations with 3rd party products -- i.e. Grid products, OSGi, etc - Avoids assumptions about environment in API so easily applicable in Grid (Tangosol/Oracle example) - SCA enabled by Spring - Interface21 is member of Open SOA - OSGi -- Doesn't currently support injection -- Complementary Technologies -- Injection/AOP component model -- Dynamic runtime model -- Spring OSGi Goals: --- Use spring to configure bundles --- Easier to publish and consume services accross multiple bundles --- Enable apps to be coded without dependency on OSGi APIS (easier unit and integration testing) --- Provide the needed bundles and infrastructure to deploy OSGi based apps to app servers --- Led by Interface21 supported by OSGi and others vendors --- Spring modules will be packageable as OSGi bundles --- Export and Import OSGi services from Spring context --- Example: <osgi:reference ... <osgi:service --- OSGi is a rigorous approach to visibility (bundle classloading) --- Versioning is also inherent to OSGi bundles - Spring Security will be the new name for Acegi - Will be bundling for purpose-driven downloads (i.e. Web Flow with Security, etc.) 1.1 Unleashing the Power of JAX-WS RI: Spring, Stateful Web Services, SMTP, and More - Speaker(s): Kohsuke Kawaguchi, Jitendra Kotamraju - Using spring for deployment - Create a handler bean and a service bean, inject the handler to the service - Can also export over JSON for JavaScript clients -- @BindingType(JSONBindingID.JSON_BINDING -- Any JAXB bindings are supported for JSON format - SFSB -- @com.sun.xml.ws.developer.Stateful - public static endpoint declaration - EndpointReference return type via manager.export(); - SFSB using proprietary API but standard on the wire for WS-Addressing - Transports -- In-VM Testing, developing, very fast, why use a true transport layer -- Example: <in-vm:bindings id="books"><in-vm:endpoints><ws:service... -- JMS -- One queue for req and a temp queue for response -- SMTP - Nice for asynchronous, and firewall friendly -- Example: -- <wsm:smtp service=#gretting..." incoming= outgoing= /> -- <wsm:sender id= host= from= /> -- <wsm:pop3 ... -- SOAP/TCP - Part of WSIT in GlassFish v2, configurable in NetBeans - Additional Headers... - Type cast proxy to WSBindingProvider {code} HelloPort proxy = ...; WSBindingProvider bp = (WSBindingProvider) proxy; Header h = Headers.create(new QName("hdr1"), "mystr1"); bp.addOutboundHeaders(h); {code} - Multiple Services Instances - To handle concurrency issues with @WebService pojos - WebServiceContext can be used to get HttpSession - Use @HttpSessionScope to declare one service instance per HttpSession - No need to store your state to HttpSession, instance variables are fine - Use @ThreadScope to not have to write ThreadLocal type boilerplate for threadsafe resources - Scope by session, thread, request, etc - Can create instances using a custom policy - Monitoring and Logging... - enable client and server transport logging (system properties) - com.sun.xml.ws.transport.http.client.HttpTransportPipe.dump=true - com.sun.xml.ws.transport.http.HttpAdapert.dump=true - Server Side Asynchrony... - The AsyncProvider doesn't immediately turn a response to avoid blocking, use a callback to receive response -- AsyncProviderCallback - RI is used in GlassFish, BEA 10, TmaxSoft JEUS6,JDK 6 1 Gosling's Toy Show - Project Dlight (cool diagnostic tool) - Sun Compute Grid available on network.com, provides web services, takes spreadsheets, etc, 200 CPU hours for free - Tor's Demo of NetBeans Rails support, bottom up JPA generation, etc 2007-05-14 16:42:32.0 2007-05-09 23:46:34.0