Java

Syndicate content 11 

Astronomers’ tools

5 years ago, on December 19, 2013, the ESA launched an orbital telescope called Gaia. Learn more about the Gaia mission on the official website of the European Space Agency or in the article by Vitaly Egorov (Billion pixels for a billion stars).

However, few people know what technology the agency chose for storing and processing the data collected by Gaia. Two years before the launch, in 2011, the developers were considering a number of candidates (see “Astrostatistics and Data Mining” by Luis Manuel Sarro, Laurent Eyer, William O’Mullane, Joris De Ridder, pp. 111-112):

Comparing the technologies side-by-side produced the following results (source):

TechnologyTime
DB213min55s
PostgreSQL 814min50s
PostgreSQL 96min50s
Hadoop3min37s
Cassandra3min37s
Caché2min25s

The first four will probably sound familiar even to schoolchildren. But what is Caché XEP?

Last comment 9 January 2019
1 3
450

views

+ 8

rating

IRIS is a powerful platform and one of the new features is the Java Business Host (DOC: Connecting Systems Using Java Business Hosts) that allow you to develop Business Services and Business Operations directly in Java (JavaDocs of the InterSystems Gateway Package).

I was testing this feature using an IRIS Docker image, but this image doesn't come with Java, the image is a bare Ubuntu image plus IRIS. So I had to build a new image adding the Java stuff. After some research I finally get this Dockerfile

Last comment 8 January 2019
1 3
229

views

+ 3

rating

As we all know, Caché is a great database that accomplishes lots of tasks within itself. However, what do you do when you need to access an external database? One way is to use the Caché SQL Gateway via JDBC. In this article, my goal is to answer the following questions to help you familiarize yourself with the technology and debug some common problems

Last comment 28 December 2018
2 4
1724

views

+ 8

rating

This is a FYI for anyone who has experienced the following error after upgrading an existing  instance to any product based on Caché 2017.2.2. In our case, the products are HealthShare HealthConnect for Redhat x64 and for Windows x86-64 but I believe it would be a common problem for any InterSystems product on any platform, if based on Caché 2017.2.2. After upgrading our development instance from 2016.2.2 to 2017.2.2, we experienced the following errors when attempting to start a pre-existing Java Object Gateway that was defined prior to the upgrade:

Execution returned: 'Error: Could not find or load main class '

*ERROR* Return from StartGatewayObject: ERROR #5001: There were errors returned when trying to start the Java Gateway

An error occurred while trying to start the Gateway Server

1 2
0

comments

133

views

+ 1

rating

With the release of InterSystems IRIS, we're also making available a nifty bit of software that allows you to get the best out of your InterSystems IRIS cluster when working with Apache Spark for data processing, machine learning and other data-heavy fun. Let's take a closer look at how we're making your life as a Data Scientist easier, as you're probably already facing tough big data challenges already, just from the influx of job offers in your inbox!

Last comment 17 May 2018
0 4
458

views

+ 2

rating

Recently we have exercised this with a partner. It may be helpful for others as well.

The basic functionality is to connect to SAP through SAPJCo (Supporting SAPJCo 3.07+).

As a first step have a production with at least two items of the following type:

  • EnsLib.JavaGateway.Service
  • EnsLib.SAP.Operation

Configure the settings for the Java Gateway and the SAP Operation accordingly. And start the production.

 

Now the library sapjco3.jar needs to get imported to be used by further internal functionality.
Therefore start in a browser the webpage for simplified SAPJCo base installation

/csp/<your sapjco namespace>/EnsPortal.Dialog.SAPJCO.BaseConfiguration.cls.

Name the SAPJCo-Operation just in the wizard (in our case it is called „SAPJCoOperation“ within the production)

Last comment 10 January 2017
0 3
550

views

+ 1

rating

This is the first follow up after the post about headstarting SAPJCo3 with Ensemble and HealthShare ( https://community.intersystems.com/post/headstart-connect-sap-using-sapjco3-ensemble-and-healthshare).

Using the wizard which is available with Version 2016.1 and up (currently only through direct call in the webbrowser http://<server>:<port>/csp/<namespace>/EnsPortal.Dialog.SAPJCO.BaseConfiguration.cls ).

Make sure you have a running production with a configured SAPJCoOperation. After entering the SAP Operation field and clicking on Change connect information you should see the „Connect to SAP was succesful“. Indeed this already calls a „PING“ remote function call (RFC)

Last comment 27 August 2016
0 2
268

views

+ 1

rating

Presenter: Maxim Vershinin
Task: Easily extend your solution’s range of interoperability
Approach: Build Java-only business services and business operations that exploit open-source Java libraries
 

Problem: The title states the problem Open source java libraries exist for hundreds of protocols and formats. This session explains how you can easily build java only Business Services and Business Operations to that exploit these libraries to extend the range of interoperability.

 

Content related to this session, including slides, video and additional learning content can be found here.

0 1
0

comments

173

views

0

rating

Presenter: Gerd Nachtsheim
Task: Contribute to and influence open-source communities
Approach: Discuss how the joint efforts of people within and outside of InterSystems created our Hibernate driver and contributed to the Hibernate project
 

Description: The development of our latest Hibernate driver was a joint effort of multiple groups of people within and outside of InterSystems with different roles that was ultimately contributed to the Hibernate project. Come to this session to learn more about how open-source communities think and how you can leverage and contribute.

Problem: Everyone else appears to be doing open-source contributions, but it doesn’t fit into our company.

Solution: If you find an open source project that is interesting for you or your customers, contribute to that project and make it a better one that is also easier to use within your landscape.

 

Content related to this session, including slides, video and additional learning content can be found here.

0 1
0

comments

144

views

0

rating