Questions Tagged With ivy

JAX-RS method returns StreamingOutput fails with "Access to ivy environment outside a process request thread is not possible"

Genzer Hawker — Mon, 03 Oct 2016 14:50:20 -0400

Hi Ivy team

I want to build a JAX-RS API returning response in a streaming manner (chunked transfer encoding). The code looks like below:

@Path("{applicationName}/streams")
public class StreamingResponseRestSResource {

    @GET
    public Response getStreamingResponse() {

        // This works by keeping a reference then pass it to the anonymous class.
        // It may NOT work in all situations.
        final Logger logger = Ivy.log();


        StreamingOutput streamingOutput = new StreamingOutput() {

            @Override
            public void write(OutputStream output) throws IOException,
                    WebApplicationException {

                PrintWriter out = new PrintWriter(new BufferedWriter(
                        new OutputStreamWriter(output)), true);

                Ivy.log().error("HHH - BREAK HERE");

                logger.error("HHH - It works with passed reference of Logger");

                IntStream.range(0, 100_000)
                    .forEach(c -> out.println("HHH - Count up to " + c));

            }
        };

        return Response.ok(streamingOutput).build();
    }
}

Full code here: http://pastebin.com/tEAMGFB3

If I do

curl -i -u Developer:Developer http://localhost:8081/ivy/api/designer/streams

the response would be:

{ "errorId": "1578A42A15718503", "errorMessage": "Access to ivy environment outside a process request thread is not possible.\nCurrent thread: Thread[http-nio-8081-exec-14,5,main]", "statusCode": 500 }

If I comment out the line ...

Ivy.log().error("HHH - BREAK HERE");

...the error disappears.

Is there anyway to fix the access to Ivy with StreamingOutput implementation?

Lucene versions conflict when migrating from Xpert.ivy v4 to Axon.ivy v5

Genzer Hawker — Mon, 13 Apr 2015 08:07:15 -0400

Our project have encountered an urgent situation in which we have to migrate all modules into Axon.ivy v5.1.4. The migration have some serious trouble with Lucene.

Our project uses Lucene v3.6.0 and we have the lucene-core-v3.6.0.jar in our buildpath. After migrating into Axon.ivy 5.1.4, the project cannot built anymore since we get strange complilation error:

Errors occurred during the build.
Errors running builder 'Ivy Web Service Process Class Builder' on project 'test'.
Bad return type
Exception Details:
  Location:
 ch/test/lucene/LuceneManager.analyzer()Lorg/apache/lucene/analysis/Analyzer; @10: areturn
  Reason:
    Type 'org/apache/lucene/analysis/standard/StandardAnalyzer' (current frame, stack[0]) is not assignable to 'org/apache/lucene/analysis/Analyzer' (from method signature)
  Current Frame:
    bci: @10
    flags: { }
    locals: { }
    stack: { 'org/apache/lucene/analysis/standard/StandardAnalyzer' }
  Bytecode:
    0000000: bb00 f459 b200 28b7 00f6 b0

We found out that the Axon.ivy has upgraded Lucene to v4.5.1 which contains a lots of incompatible changes compared to Lucene v3.6.0. The problem is we could not find a way to force the Axon.ivy build the project with lucene-core-v3.6.0.jar instead of the built-in lucene-core-v4.5.1.jar

UPDATE

We later tried to upgrade our implementation into Lucene 4.5.1 but got several other problems:

(1) Axon.ivy issues warnings about we are trying to access Lucene API.

(2) Start the project in Axon.ivy Designer will encounter ClassNotFoundException:

Caused by: java.lang.NoClassDefFoundError: org/apache/lucene/analysis/Analyzer
     at ch.soreco.alag.ria.service.taskindex.LucenceHandler.startLuceneInstance(LucenceHandler.java:6)
     at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
     at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
     at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
     at java.lang.reflect.Method.invoke(Unknown Source)
     at ch.ivyteam.ivy.scripting.internal.types.IvyJavaMethod.invokeImpl(IvyJavaMethod.java:73)
     ... 35 more
    Caused by: java.lang.ClassNotFoundException: org.apache.lucene.analysis.Analyzer
     at ch.ivyteam.ivy.java.internal.IvyProjectClassLoader.loadClass(IvyProjectClassLoader.java:243)
     at java.lang.ClassLoader.loadClass(Unknown Source)
     ... 41 more

.. even if all the jars are shipped with Axon.ivy.

(3) If we try to include the jars file into our projects (in the classpath), the build will halt with the Bad Return Type error above.

QUESTIONS

How could we force the Axon.ivy to build our projects using the lucene-core-v3.6.0 instead of the lucene-core-v4.5.1 shipped with Axon.ivy?
Why do we get strange problems when building the projects with built-in Lucene library of Axon.ivy v5.1.4?

SAMPLE PROJECTS

I attach in this email the two sample projects which illustrate the problems we are facing. We tested the two with AxonIvyDesigner5.1.4.48243_Windows_x64:

use_built_in_lucene.iar: This project illustrates the problem which we cannot built the project if it uses Lucene's classes.
use_external_lucene.iar: This project illustrates the problem which we purposely include the Lucene's jar files but the project still fails.

UPDATE 2 (extend the answer)

The solution from Reguel Wermelinger which suggest to repack all the classes in lucene-core-v3.6.0.jar in different package name works.

1- Download JarJar (hosted on Google Code, if you read this after 25.01.2016, please search it on GitHub).

2 - Put the file lucene-core-v3.6.0.jar at the same directory at JarJar.

3 - Create a text file, namely rules.txt, contains one line

rule org.apache.lucene.** org.apache.lucene.v3_6_0.@1

4 - Execute the command

$ java -jar jarjar.jar rules.txt lucene-core-v3.6.0.jar lucene-core-v3.6.0-repacked.jar

5 - Done!

You can download the already-repackged lucene-core-v3.6.0-repacked.jar

Please note that this is only a work-around. The Axon.ivy still has problem if you use the Lucene v4.5.1 shipped with it.

How to start the Ivy Server in plain Java?

Genzer Hawker — Mon, 02 Mar 2015 11:11:00 -0500

There are several questions regarding how to access to Ivy environment JUnit tests but there is no elegant solution so far.

In Ivy Designer, if I start the Ivy Server and then start run JUnit tests, the Ivy Server will be automatically stopped. I'm trying to find a way to avoid this (and not sure if there is).

I'm trying to implement a JUnit TestRunner which could start the Ivy Server programmatically but as of now, I don't know the way. What I could found is:

IServer server = ServerFactory.createEclipseEmbeddedTestServer(); server.start(null); <-- stuck here since I don't know how to instantiate IProgressMonitor

My questions are:

Is it possible to configure and run JUnit tests in designer along with the engine?
How can we programmatically start a server?

Thanks & Best Regards