Consider a Natural Key with an Identity (Serial) field.

I cannot seem to acquire the generated value after persisting my entity. That is, the returned entity by Spring Data's "save" does not have the generated value.

The value is generated by the database, and I can query it after

I have done some testing and created a Github repo with it...

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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.

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prashantha M · Aug 2, 2020
Kafka Java Host

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


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Hi All, 

I am trying to add pdfbox-2.0.18.jar file into Ensemble and getting below error but with pdfbox-1.x it's working fine. So can anybody please assist me to do fix below issue as showing in screen shot.



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Hello everybody,

My question would be, how is the recommended way to access Windows shares, also in view of future demads. Of course, I'm also happy about an explanation or code snippet of how the library, which is mentioned in the following , can be used under cache.

The classic jcifs library is easy to use, also with Cache, but as microsoft ceases support for smb1, we are currently looking for alternatives. jcifs-ng is such a library, which we took a closer look at. In java code a jcifs-ng file operation looks like this:

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Hello community,

I'm new to Objectscript and Intersystems development. I've read documentation and some examples and succeded to import my Java class  file into HealthShare using the Java Gateway Service. To import my class i tryed both methods (Wizard, or scripting) with success.

Everything works great, i see my imported class inside the namespace, and i can call the methods.

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I am under the impression that inside HealthShare you can Services, Processes, and Operations. The service takes incoming data, the processes can process that data, and then the operations can send that data out.


I am curious if anyone has any experience, guides, or advice on how I can send data to a service using a Java application. I intend for the data to be in XML format. I am also curious if I succeed at picking up the data in the service, how I send the data back to the Java application using an Operation.


0 2 177
Marcio Coelho · Dec 2, 2019
Operation System Permission

Hi all...

I am try to execute a class method from JDBC connection. My method are simple, just create a file at $HOME  like this:


set sc='$zf(-1,"touch $HOME/lixo.txt > /var/tmp/log666 2>&1")

I put a log file to this commnad because it's don't work, and in log file i get this:

touch: cannot touch ‘/root/lixo.txt’: Permission denied

after to try other commands I found that user and enviromnent  variables are diferents:
I try this:

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 I have two local instances:

  • IRIS for Windows (x86-64) 2018.1.2 (Build 626_3U) Wed Jun 12 2019 19:07:59 EDT
  • IRIS for Windows (x86-64) 2019.1 (Build 510U) Thu Mar 14 2019 14:13:37 EDT

I'm using Java Gateway to talk to external system.

Both instances are using the same:

  • jar
  • generated class
  • java version

They are calling the same method with this java signature:

1 1 107

Hi! I am working in a java project (Spring Boot+ Maven + Hibernate) using jpa/hibernate to manage the persistance with the IRIS database from the Docker image (store/intersystems/iris:2019. and I've found an issue using the IRIS instance, when I define tables with relationships OneToMany, ManyToOne or ManyToMany and I try to fetch all the rows of the tables using the default method findAll (JpaRepository implements that method to get all the rows by default) the query automatically exceeds the limit of licenses availables.

1 11 350

Hi everyone,

Im new  in cache, i came from Java and im missing some features that i couldn't find in the documentation,  I hope you can help me with this questions.

Just a brief introducction: 

- Im in a project with old cache version, so saddly i can't use Eclipse + Atelier, so im using Studio.

- Currently im in a project with persistent classes, we want to turn apart the globals and focus on tables. 

The questions:

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Hi All,


I'm trying to create a simple wrapper class around a JSON schema validator library, written in Java, and calling this functionality through the Java Gateway of IRIS 2019.1.

My Java wrapper class has a constructor like this:

public JSONValidator(char[] jsonStream, char[] schemaStream) { ... }


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Ricardo Paiva · May 6, 2016
Load a dll at run time

I am using java gateway imported/proxy classes and JG business service. I need to load a dll at run time.

I use System.loadLibrary/System.load when in java. I’ve tried $ZF(-3,” C:\Windows\System32\pteidlibj.dll”) and $ZF(-4,1,"C:\Windows\System32\pteidlibj.dll") but I’m getting <DYNAMIC LIBRARY LOAD> error.

How can I load a dll at run time using COS?

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