Java

Interoperability Between Java™ Technology and .NET: More Than Just Web Services Kevin Wittkopf Solutions Architect Microsoft http://www.microsoft.com Wayne Citrin CTO JNBridge http://www.jnbridge.com Session TS-3367 2005 JavaOneSM Conference | Session TS-3367

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Java™ Technology and .NET Interoperability Techniques and Tools

Interoperability between Java Technology and the .NET Framework when Web Services aren’t an option

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Agenda What Does ‘Interoperability’ Mean for This Session Common Interoperability Scenarios Interoperable Data Point to Point Interoperability Demo Resource Tier Interoperability Wrapup, Q&A 2005 JavaOneSM Conference | Session TS-3367 |

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Agenda What Does ‘Interoperability’ Mean for This Session Common Interoperability Scenarios Interoperable Data Point to Point Interoperability Demo Resource Tier Interoperability Wrapup, Q&A 2005 JavaOneSM Conference | Session TS-3367 |

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What Does ‘Interoperability’ Mean for This Session • Communication between Java™ platform and .NET based processes, either directly or indirectly • Invocation of action over the wire • Protocol + wire level format • Think RMI, or Java™ Message Service (JMS) API • Focus is on .NET clients and Java™ 2, Standard Edition, J2SE™ server (common scenario)

• Not Web Services-based interoperability • NOT interoperable code, e.g., • Compiling or translating Java source or binary to run on CLR • Compiling or translating .NET source or binary to run on Java™ Virtual Environment, JVM platform

• NOT migration of Java source or binary to .NET/MSIL 2005 JavaOneSM Conference | Session TS-3367 |

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Why Not Web Services? • Interoperability—isn’t that what Web Services are supposed to solve? • Web Services can be used in many cases, but they have limitations: • • • •

Slow performance Lack of fine-grained interaction capability Poor cross-platform exception handling No support for callbacks

• Where Web Services fall short, class-level interoperability solutions excel 2005 JavaOneSM Conference | Session TS-3367 |

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Agenda What Does ‘Interoperability’ Mean for This Session Common Interoperability Scenarios Interoperable Data Point to Point Interoperability Demo Resource Tier Interoperability Wrapup, Q&A 2005 JavaOneSM Conference | Session TS-3367 |

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Agenda What Does ‘Interoperability’ Mean for This Session Common Interoperability Scenarios Interoperable Data Point to Point Interoperability Demo Resource Tier Interoperability Wrapup, Q&A 2005 JavaOneSM Conference | Session TS-3367 | 12

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Interoperable Data Interoperability challenges • Data types exist on one platform, but not on the other • • • •

java.sql.ResultSet in Java System.Data.DataSet in .NET Similar functionality, different data Also, does a String on one == a String on the other?

• In general, accurate and reliable data exchange is the number one challenge to building interoperable solutions • It’s all about Serialization • Taking a data type on one platform and converting it such that it can be transported to, and understood by the other

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Interoperable Data Mitigating risks of data interoperability

• Data first, then code • • • •

Avoid merging schemas Use a static canonical schema Keep to XSD types Build and maintain unit tests

• Architect a central repository • Uniform Naming Convention • Consider repository for data types within Organization

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Agenda What Does ‘Interoperability’ Mean for This Session Common Interoperability Scenarios Interoperable Data Point to Point Interoperability Demo Resource Tier Interoperability Wrapup, Q&A 2005 JavaOneSM Conference | Session TS-3367 | 19

Interoperability Technologies Types of interoperability

• Point to Point • Direct, between two points • Calls tend to be synchronous

• Arbitrated • Indirect, involving one or more intermediate servers or hubs (e.g., message-based, etc.) • Calls tend to be asynchronous

• Resource Tier • Shared access to resource (e.g., DB, Message store, etc.) from heterogeneous clients • Interop used to facilitate notification of resource events (e.g., data updates) across clients 2005 JavaOneSM Conference | Session TS-3367 | 20

Point to Point Interoperability • XML Web Services • RMI/IIOP CORBA Channel • .NET Remoting

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Point to Point Interoperability RMI/IIOP channel to CORBA

• OMG Specification • .NET client proxy implementations • Borland Janeva (http://www.borland.com) • Remoting.Corba (http://remoting-corba.sourceforge.net) • IIOP.NET (http://iiop-net.sourceforge.net)

• Interoperability Benefits • Binary communication over TCP (Performance) • No modifications required on the server (Simplicity) • Good for .NET client -> Java server applications

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Point to Point Interoperability .NET remoting

• • • • • • •

Similar to Remote Method Invocation (RMI) Remote object access via proxies Binary, SOAP, or custom serialization TCP, HTTP, or custom protocol Synchronous/Asynchronous Pass by reference Events and delegates

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Point to Point Interoperability .NET remoting

• Microsoft Specification (available to license) • Third party implementations for Java 1.2+ • JNBridge Pro/ProEE (http://www.jnbridge.com) • Intrinsyc J-Integra/Ja.NET (http://www.intrinsyc.com)

• Competitor or complimentary to Web Services?

• Interoperability Benefits • • • •

Binary communication over TCP (Performance) Inter-process communication (Simplicity) Pass by reference (Flexibility) Windows Server 2003 Component Services support • (via SOAP Activation) 2005 JavaOneSM Conference | Session TS-3367 | 24

Point to Point Interoperability .NET remoting .NET Platform

Java Virtual Machine

C#, C#, J#, J#, C++, C++, VB, VB, etc. etc.

Java Java Classes Classes

.NET-Side Proxies

.NETSide Runtime

Communications via Shared Memory, TCP/Binary or HTTP/SOAP

Java-Side Runtime

Run Time Generates

Proxy Generation Tool

Development Time

This illustrates .NET accessing Java. The architecture for Java accessing .NET is similar

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DEMO .NET Client to J2EE Server .NET Remoting-based Bridging Using JNBridge

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Agenda What Does ‘Interoperability’ Mean for This Session Common Interoperability Scenarios Interoperable Data Point to Point Interoperability Demo Resource Tier Interoperability Wrapup, Q&A 2005 JavaOneSM Conference | Session TS-3367 | 27

Resource Tier Interoperability • Arbitrated, mostly asynchronous, between two or more points • Can utilize point to point technology for connectivity • For .NET and J2EE Interoperability

• Shared database • Message queue • Broker

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Resource Tier Interoperability Shared database

• Enabled by use of Open Access Database Drivers • Oracle OCI Driver for ADO.NET • SQL Server 2000 Driver for JDBC • Many vendor and Third Party Implementations

• Interoperability Benefits • Easiest way to achieve interoperability using resources • Universally recognized way to store data • Stored Procedures allow logic to be written once 2005 JavaOneSM Conference | Session TS-3367 | 30

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Resource Tier Interoperability Shared message queue • Vendor-rich Selection • MSMQ 3.0 (HTTP SRMP endpoint) • IBM WebSphere MQ (.NET Adapter available via SupportPac) • J2EE Application Server Vendor via JMS API • .NET Remoting/RMI Bridging with JMS client

• Fiorano, Silverstream, Sonic, Tibco, etc.

• Interoperability Benefits • • • •

Ideal for N-N Interoperability Scenarios Transaction Support Reliable Messaging Support Publish/Subscribe 2005 JavaOneSM Conference | Session TS-3367 | 33

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Resource Tier Interoperability Broker

• Technologies • Microsoft BizTalk Server 2004

• Interoperability Benefits • Ideal for N-N Interoperability Scenarios • Transaction Support • Multiple Adapter Support • Connection to legacy and disparate systems

• Message Transformations • Orchestration

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Summary • There are a number of Java and .NET interoperability scenarios that may need to be supported • Web Services may not be possible or optimal • Design and testing for interoperable data is critical and should be done up front • Point to point interoperability using .NET Remoting-based bridging allows for binary, RPC-style interoperability between the two platforms • Interoperability can also be achieved through shared resources such as databases and message hubs, and can be augmented with point to point approaches to implement notifications and synchronization 2005 JavaOneSM Conference | Session TS-3367 | 36

For More Information • Web Services Interoperability Sessions: • TS-3552—“JavaTM Technology and .NET interoperability using WS-* Web Services Architecture” • TS-9866—“Advanced Web Services Interoperability”

• Interoperability Resources: • http://msdn.microsoft.com/vstudio/java/interop/default.aspx • http://msdn.microsoft.com/java • http://www.microsoft.com/windowsserversystem/jplusn

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For More Information Available today! Developer focused: • Fundamentals • Point to Point • Asynchronous • Advanced Interoperability

Amazon.com: http://www.amazon.com/exec/obidos/ ASIN/0735619220/qid=1058741448

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For More Information Available today! • •

Builds on concepts of the toolkit Shows ‘XBikes’ reference application between .NET and IBM WebSphere

URL: http://www.microsoft.com/practices

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Q&A Kevin Wittkopf—Solutions Architect, Microsoft Wayne Citrin—CTO, JNBridge

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• You can win a $75.00 gift certificate to the on-site Retail Store by telling Sun what you think! • Turn in completed forms to enter the daily drawing • Each evaluation must be turned in the same day as the session presentation • Five winners will be chosen each day (Sun will send the winners e-mail) • Drop-off locations: give to the room monitors or use any of the three drop-off stations in the North and South Halls Note: Winners on Thursday, 6/30, will receive and can redeem certificates via e-mail. 2005 JavaOneSM Conference | Session TS-3367 | 41

Interoperability Between Java™ Technology and .NET: More Than Just Web Services Kevin Wittkopf Solutions Architect Microsoft http://www.microsoft.com Wayne Citrin CTO JNBridge http://www.jnbridge.com Session TS-3367 2005 JavaOneSM Conference | Session TS-3367

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