Re: [Hyperledger Project TSC] Hyperledger Fabric Java SDK Proposal


Arnaud Le Hors
 

+1.
--
Arnaud  Le Hors - Senior Technical Staff Member, Open Web Technologies - IBM Cloud


hyperledger-tsc-bounces@... wrote on 09/29/2016 05:41:40 PM:

> From: Tamas Blummer via hyperledger-tsc <hyperledger-
> tsc@...>

> To: hyperledger-tsc@...
> Date: 09/29/2016 05:42 PM
> Subject: Re: [Hyperledger Project TSC] Hyperledger Fabric Java SDK Proposal
> Sent by: hyperledger-tsc-bounces@...
>
> +1
>
> TAMAS BLUMMER
> CHIEF LEDGER ARCHITECT
> Digital Asset
>
> T: +36 1 883 0300
> E: tamas@...
> W: digitalasset.com
>
> > On 29 Sep 2016, at 16:02, Christopher Ferris via hyperledger-tsc
> <hyperledger-tsc@...> wrote:
> >
> > All,
> >
> > I've seen mostly positive comments on the proposal from DTCC and
> Fujitsu to incubate a fabric-sdk-java project. Since we won't be
> meeting until next week, and since the team is eager to begin
> collaboration, I suggest we take an email vote.
> >
> > TSC members, please reply with +1 or -1 to this note indicating
> your support (or not) for incubating this proposal. I'll send a
> reminder but a reply today would be much appreciated.
> >
> > Thanks
> >
> > Chris
> >
> > On Mon, Sep 19, 2016 at 11:05 PM, Vishnumolakala, Pardha S. via
> hyperledger-tsc <hyperledger-tsc@...> wrote:
> > Hi,
> >
> >  
> >
> > DTCC and Fujitsu Australia Software Technology (FAST) would like
> to present the following Java SDK proposal for Hyperledger Fabric project.
> >
> >  
> >
> > This proposal is available at the following URL(s) for community to review.
> >
> >  
> >
> >
http://bit.ly/2cqmE1Z
> >
> >
https://docs.google.com/document/d/
> 1dP3zUInx7fSr8X1iDOs4R5gFaoixiXeLF5LYeL48_M8/pub
> >
> >  
> >
> >
> > Fabric Java SDK Project Proposal
> > Sponsors
> > Eiichiro Fujimura
> > Fujitsu Australia Software Technology
> > 14 Rodborough road, Frenchs Forest, NSW 2086,  Australia
> > eiichiro.fujimura@...
> > Pardha Vishnumolakala
> > DTCC
> > pvishnumolakala@...
> > Abstract
> >
> > Create a java SDK library for the Hyperledger fabric project. This
> SDK will be based on the design principles of Node and Python SDKs,
> and is intended to increase the use of fabric by introducing
> capability to use Hyperledger fabric for existing/new java based
> applications. Since REST APIs in Hyperledger fabric are being
> deprecated, it is important to provide support for multiple
> languages if we want to see the Hyperledger fabric being used by all
> sorts of applications.
> > Context
> >
> > Initially Hyperledger fabric included Node SDK along with REST
> APIs so that users can interact with Hyperledger fabric. Now that
> REST interfaces in Hyperledger fabric are being deprecated, the
> application developers of non-Node applications are left with no
> choice but to write modules in Node that interact with Hyperledger
> fabric, and then integrate these modules with their applications
> written in languages other than Node. To overcome this problem,
> there is a strong need from the community to increase the number of
> SDKs for different languages. As a result, we saw the approval of
> Python SDK in TSC a couple of weeks ago.
> > Motivation
> >
> > Currently there are two ways for applications to interact with
> Hyperledger fabric
> >    • gRPC: Currently Node and Python applications can use
> Hyperledger fabric as these are the only two SDKs available at the moment.
> >    • REST APIs: provide minimum functions to interact with fabric,
> however these are being deprecated by Hyperledger fabric. Once they
> are removed, the use of these APIs will be no longer an option and
> users will be forced to use a programming language that has an SDK
> for fabric, or look at alternatives instead of using Hyperledger
> fabric at all.
> > Java is a very popular language and it is important to provide
> native api in order for Java application developers to use
> Hyperledger fabric in their projects.
> > Status
> >
> > We propose this to be an incubation project initially.
> > Solution
> >
> > We are proposing a Java SDK for Hyperledger fabric to support the
> following functionality.
> > ·         Application Development
> >
> > ·         Register and Enroll users by connecting to member services
> >
> > ·         Submit transactions to peer
> >
> > ·         Get details about blocks and transactions
> >
> > ·         Listen to events generated by the network
> >
> > ·         Chaincode Development
> >
> > ·         Support chaincode development using Java
> >
> > ·         Deploy chaincode
> >
> > ·         Invoke/query chaincode
> >
> > ·         Support Development Lifecycle
> >
> > ·         Integrate chaincode support code from Fabric so that
> java developers need only the sdk to develop
> >
> > ·         Stable builds available in maven repository
> >
> > In addition to providing the above functionality, Java SDK will
> act as a bridge between user application and the fabric so that if
> there is a protocol change on the server side, user only needs to
> get the latest sdk instead of modifying their code.
> > Java SDK team will closely follow the SDK design specification
> currently being developed and discussed on slack channel #fabric-sdk-dev.
> > Effort and resources
> >
> > DTCC and Fujitsu Australia Software Technology are committing
> full-time engineering resources to ensure the success of this
> project. We are also closely working with IBM to monitor and update
> any upcoming changes in the Hyperledger fabric project so that this
> project can keep up to date with the fabric specification. The
> following would be the initial set of maintainers for the project:
> >    • Satheesh Kathamuthu
> >    • Pardha Vishnumolakala
> >    • Muhammad Altaf
> > References
> >
> >         Fabric SDK Specification
> > Closure
> >
> > Once the project build is available on maven central repository,
> we can measure the success of the project in terms of downloads
> which can be obtained from the central maven repository.
> >  
> >
> >
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