Spring Boot is the most used Java framework to create REST API and microservices. It can be used to deploy web or executable web or desktop self-contained apps, where the application and another dependencies are packaged toghether. Springboot allows you do to a lot of functions, see:

Note: to learn about SpringBoot see official site - https://spring.io/quickstart

To create an web api application, with one or more microservices can you use Spring IDE for Eclipse or VSCode and use a wizard to config the technologies above that will be used into your app, see:

Hi....
I am trying to execute legacy routines from Cache 2018, into new environment with Iris 2021. I use new JDBC driver to make this connection, and change my java code to execute this legacy  routines. But I get this write error: <REMOTE EXECUTE INVALID WRITE> 
I changed the mnemonic routine to populate object and return this object to java. And the java class convert this object to json.
This is my simple classes used for this process, just to exemplification:
Java Class

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):

• IBM DB2,
• PostgreSQL,
• Apache Hadoop,
• Apache Cassandra and
• InterSystems Caché (to be more precise, the Caché eXTreme Event Persistence technology).

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

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

Hello. I'm having problems migrating a java application that is running with cache 2018 to Iris
The application uses json generated by the cache to receive it as a string in java.

Basically an instance of the "%ZEN.proxyObject" class
On Iris I've been trying to convert this '%ZEN.proxyObject Object to an instance of the %GlobalBinaryStream class and I need to get it via reference.
But I haven't had success yet. I Just found example with primitive dataTypes via reference and I need a Streams.
Has anyone done something like that?
This is my cache class example:

Is it possible to call java programs inside SQL statements, like the new LOAD Data, or is this just internal?

We found out recently that when compiling an objectscript class that has a java projection, using the -d flag, it ignores it for the projection part:

After talking with intersystems luckily the've provided a solution that will be included in the next release:

Is there somewhere  a dialect  class for Cache 2018.1  with  Hibernate  version 5.x ?

I'm trying to produce Kafka Message to Topic using Java Objects. I have build Business operation and  Jar file and trying to execute. I'm getting following exception 

Terminating Job 8316 / 'IrisKafkaProducer' with Status = ERROR #5046: Error executing java command 'init() returned: "ERROR #5034: Invalid status code structure ("java.sql.SQLException: [InterSystems IRIS JDBC] Communication link failure: Access Denied")"'. Java may not be installed correctly on your system., %QuitTask=

Getting following trace at Audit Database

PEX is a new InterSystems IRIS feature to allows extends IRIS with existent features from Java or .NET.

It is possible create interoperability inbound and outbound adapters, business services (integrate from external to internal) and operations (integrate internal to external).

To create a PEX component it is necessary import .NET (InterSystems.EnsLib.PEX.*) or Java (com.intersystems.enslib.pex.*) packages and extends or implements the properly class.

In this article I will use my OCR Service. It has a PEX business Operation, see the code:

In this article, I will show how you can easily containerize  .Net/Java Gateways.

For our example, we will develop an Integration with Apache Kafka.

And to interoperate with Java/.Net code we will use PEX .

Architecture

Our solution will run completely in docker and look like this:

Java Gateway

First of all, let's develop Java Operation to send messages into Kafka. The code can be written in your IDE of choice and it can look like this.

In short:

Hi Developers!  Let me share with you some exercises from a workshop about developing interoperability components in Java using PEX (Production EXtension).

You will find slides and step by step exercises about:

• Understanding simple PEX components coded in Java.
• Making some changes on them.

All built using containers, so you don't need to build a local Java environment.

You can reach the repository here: https://openexchange.intersystems.com/package/workshop-pex

Java Business Host is now retired

With the release of PEX in InterSystems IRIS 2020.1 and InterSystems IRIS for Health 2020.1, customers have a better way to build Java into productions than the Java Business Host. PEX provides a complete set of APIs for building interoperability components and is available in both Java and .NET.

The Java Business Host has been removed from InterSystems IRIS and InterSystems IRIS for Health as of their 2020.4 releases.  Customers using the Java Business Host are encouraged to migrate to PEX.

Advantages of PEX

According to IDC, more than 80% of information it is NoSQL, especially text into documents. When the digital services or applications not process all this information, the business lose. To face this challenge, it is possible use OCR technology. OCR uses machine learning and/or trained image patterns to transform image pixels into text. This is important, because many documents are scanned into images inside PDF, or many documents contains images with text inside. So OCR are an important step to get all possible data from a document.

The InterSystems IRIS can be extended using Java or .NET components and its frameworks inside Object Script source code.

Bulid REST API application built with ObjectScript in InterSystems IRIS. It also has OPEN API spec,  can be developed with Docker and VSCode, can be deployed as ZPM module. can be used as Overbooking System data REST api.

What's Hotel Overbooking Management System?

Hi Community,

Please welcome the new video on InterSystems Developers YouTube:

⏯ Extending Interoperability with PEX & Containers

This is a remote position for a US Citizen who has significant MUMPS background AND has experience at a deep level with Java, and AWS Services.

The location is in Kirkland Washington, however, obviously during the COVID we will be doing remote work.  Our hope is some is willing to relocated to the Seattle Region after we open up again.

Essential skill sets are:  competent if not excellent in MUMPS.   Cache Knowledge of a deep level.   Knowledge of Java and variants,  AWS - specific to hybrid cloud services - perferablly (blue sky here):  Certification as a AWS Architect - Professional.  

Web Crawling is a technique used to extract root and related content (HTML, Videos, Images, etc.) from websites to your local disk. This is allows you apply NLP to analyze the content and get important insights. This article detail how to do web crawling and NLP.

To do web crawling you can choose a tool in Java or Python. In my case I'm using Crawler4J. (https://github.com/yasserg/crawler4j).

Crawler4j is an open source web crawler for Java which provides a simple interface for crawling the Web. Using it, you can setup a multi-threaded web crawler in few minutes.

Hi Cache team, I am in the need of listing all the user defined schemas that are present my Cache db and also the user defined tables and views and Columns of those tables and views through Queries. So that I can write some JDBC code to run the queries and fetch the above metadata. Any help is appreciated.

Thanks in Advance,

Kranthi kiran.

Using the Java Gateway to speed development

InterSystems IRIS includes dynamic object gateways for Java, .NET, and (now) Python.  These gateways allow your IRIS application to use libraries in these languages, removing the need to create everything from scratch in ObjectScript.

Migrate from Java Business Host to PEX

With the release PEX in InterSystems IRIS 2020.1 and InterSystems IRIS for Health 2020.1, customers have a better way to build Java into productions than the Java Business Host. PEX provides a complete set of APIs for building interoperability components and is available in both Java and .NET. The Java Business Host has been deprecated and will be retired in a future release.

Advantages of PEX

Hi everyone, i'm using a render server to make pdf output with zen report and everything was fine till recently i've been getting this error message and i have no idea what it means, i'd be very thankfull if someone could help or got into the same situation.

Error message:

ERROR #5001: net.sf.saxon.trans.XPathException: org.apache.fop.fo.ValidationException: "fo:table-body" is missing child elements. 
Required content model: marker* (table-row+|table-cell+) (See position 817:-1)

Does anyone have a Dockerfile for .Net/Java Gateways to share?

I'm trying out PEX and I think being able to run it as a docker container would be great.

To clarify I'm interested in container without IRIS, gateway only.

Hi

Do any of you Java Ensemble enthusiasts have a simple example of an Ensemble Production and .Jar they would be willing to share with me.

Hello,

We would need some help.

We have a Java project in Eclipse which uses two external libraries, which are referenced as a maven pom.xml dependency.

We created a JAR with all the dependencies included.

We have used the Java Gateway Wizard as follows:

In the image you could see that we have chosen the project's jar, written IP and PORT of Gateway and written all external dependencies' server path separated with semicolons.

It generates the following Ensemble class:

Currently , I am using objectscript in Iris. If I switch the code from objectscript to Java means what are all the steps I need to do?

Hey Developers,

We're pleased to invite you to the upcoming "Development of Interoperability Business Hosts with PEX in Java/.Net" webinar by InterSystems Russia on July 16 at 10:00 (UTC+3, Moscow time)!

Hey Developers,

We're pleased to invite you to join the next InterSystems IRIS 2020.1 Tech Talk: Using Java and .NETon June 16 at 10:00 AM EDT! 

In this installment of InterSystems IRIS 2020.1 Tech Talks, we put the spotlight on extending InterSystems IRIS with your own custom Java and .NET code. We will demo how to create a custom interoperability component with the new Productions Extensions (PEX) feature. Following that, we’ll demo how to call Java or .NET code from any ObjectScript code.

Hello everyone,

In the purpose of my work, I have to implement a code that will communicate with a restful server coded in JAVA.

To fulfill my task, they gave me the link to the restful server + a certificate to use + the class that's going to be sent back +  the names of 2 functions:

Acces: https://XXX:8443/

First fonction: https://XXX:8443/patient/IdOfPatient

Second fonction: https://XXX:8443/patient/search/nameOfFunction?ndoss=Number

Object that returned:

{

"id" = ...

"lastname"=...

...

}

Some InterSystems Java libraries are not available in public maven repositories, like intersystems-jdbc-3.1.0.jar. In this case, to configure your Java Maven dependency, copy the external file to your project (for a folder visible to the classpath, like resources) and use <systemPath>. Follow the sample: