NPE during REST deployment

Camunda 7 Topics Discussion & Questions
1

Hi all,
I downloaded 7.7.0, activated the authentication filter in the rest-engine webapp and started the application. Now I’m trying to deploy [1] a simple model (see attachment) over the REST API but I’m getting an NPE [3]. What am I doing wrong?

[1]

String plainCreds = "demo:demo";
        byte[] plainCredsBytes = plainCreds.getBytes();
        byte[] base64CredsBytes = Base64.getEncoder().encode(plainCredsBytes);
        String base64Creds = new String(base64CredsBytes);
        HttpHeaders headers = new HttpHeaders();
        headers.add("Authorization", "Basic " + base64Creds);
        headers.add("Host", "localhost:8080");
        headers.add("Accept", "application/json");
        ByteArrayOutputStream baos = new ByteArrayOutputStream();
        InputStream in = getClass().getResourceAsStream("/test.bpmn");
        IOUtils.copy(in, baos);
        ByteArrayResource bar = new ByteArrayResource(baos.toByteArray(),"test.pbmn");

        headers.setContentType(MediaType.MULTIPART_FORM_DATA);
        RestTemplate restTemplate = new RestTemplate();
        MultiValueMap<String, Object> parts = new LinkedMultiValueMap<String, Object>();
        parts.add("deployment-name", "test.bpmn");
        parts.add("deployment-source", "test.bpmn");
        parts.add("enable-duplicate-filtering", "true");
        parts.add("deployment-name", "test-deployment");
        //parts.add("tenant-id", "camunda-admin");
        parts.add("data", bar);

        HttpEntity<MultiValueMap<String, Object>> request = new HttpEntity<>(parts, headers);
        try{
        String result = restTemplate.postForObject(
                "http://localhost:8080/engine-rest/deployment/create", request, String.class);
        System.out.println(result);
        }
        catch (HttpServerErrorException e){
            System.err.println(e.getResponseBodyAsString());
        }

[3]

java.lang.NullPointerException
	org.camunda.bpm.engine.impl.AbstractDefinitionDeployer.isResourceHandled(AbstractDefinitionDeployer.java:81)
	org.camunda.bpm.engine.impl.AbstractDefinitionDeployer.parseDefinitionResources(AbstractDefinitionDeployer.java:70)
	org.camunda.bpm.engine.impl.AbstractDefinitionDeployer.deploy(AbstractDefinitionDeployer.java:61)
	org.camunda.bpm.engine.impl.persistence.deploy.cache.CacheDeployer$1.call(CacheDeployer.java:50)
	org.camunda.bpm.engine.impl.persistence.deploy.cache.CacheDeployer$1.call(CacheDeployer.java:47)
	org.camunda.bpm.engine.impl.interceptor.CommandContext.runWithoutAuthorization(CommandContext.java:473)
	org.camunda.bpm.engine.impl.persistence.deploy.cache.CacheDeployer.deploy(CacheDeployer.java:47)
	org.camunda.bpm.engine.impl.persistence.deploy.cache.DeploymentCache.deploy(DeploymentCache.java:63)
	org.camunda.bpm.engine.impl.persistence.entity.DeploymentManager.insertDeployment(DeploymentManager.java:51)
	org.camunda.bpm.engine.impl.cmd.DeployCmd.deploy(DeployCmd.java:479)
	org.camunda.bpm.engine.impl.cmd.DeployCmd$1.call(DeployCmd.java:138)
	org.camunda.bpm.engine.impl.cmd.DeployCmd$1.call(DeployCmd.java:126)

test.bpmn (4.1 KB)

2

Hi @gowiththeflow,

According to the stacktrace and consulting the engine source code, you have added a resource to the deployment which doesn’t have a name.

Could it be you misspelled the bpmn?

Cheers,
Christian

1 Like
3

@hawky4s - you could change your nick to Hawkeys. Good catch :slight_smile:
Unfortunatelly it didn’t work:

ByteArrayResource bar = new ByteArrayResource(baos.toByteArray(),“test.bpmn”);

still leads to the same NPE. I also checked the camunda code and found the reference to resources and suffixes, I’m just not sure where it gets the resource name from.

4

Could you put the src code on GitHub so I can debug it quickly.

5

You were right about the resource name. The ByteArrayResource I was using didn’t have a name (afaik it’s not possible to do that with a ByteArrayResource) which lead to the multipart form data post not giving the model a name. Changing that to a ClassPathResource did the trick:

ClassPathResource bar = new ClassPathResource("/test.bpmn");
6

Oh yeah, this is a Spring/client issue by the way and not related in any way to Camunda.