Error while invoking deployment rest api

1

While attempting to upload the bpmn file using rest api as below, I am getting the error

here is the code:
String serverUrl = http://localhost:8080/flowable-rest/service/repository/deployments

HttpHeaders httpHeaders = setHeader(MediaType.APPLICATION_JSON.toString(),MediaType.MULTIPART_FORM_DATA.toString(), “admin”, “test”);
MultiValueMap<String, Object> body = new LinkedMultiValueMap<>();
body.add(“file”, mpFile);
HttpEntity<MultiValueMap<String, Object>> requestEntity = new HttpEntity<>(body, httpHeaders);
ResponseEntity response = new RestTemplate().postForEntity(serverUrl, requestEntity, String.class);

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getting the below error

“status”: 500,
“error”: “Internal Server Error”,
“message”: "Type definition error: [simple type, class java.util.logging.ErrorManager]; nested exception is com.fasterxml.jackson.databind.exc.InvalidDefinitionException: No serializer found for class java.util.logging.ErrorManager and no properties discovered to create BeanSerializer
(to avoid exception, disable SerializationFeature.FAIL_ON_EMPTY_BEANS)

Kindly advise to resolve this.

2

Not sure what your setHeader(String, String, String, String) method accomplishes. I’m hoping it takes that APPLICATION_JSON media type and applies it to the “Accept” header, but it’s hard to know without the source code.

This works for me (multi-tenant variant):

private void deployWorkflow(final String tenantId, final String workflowFileName) throws Exception {

    LOG.debug("Deploying the process [{}] for tenant [{}]", workflowFileName, tenantId);

    // Read the process file and replace the tenant ID token
    final Path path = Path.of(ClassLoader.getSystemResource(workflowFileName).toURI());
    final String content = Files.readString(path);
    final ByteArrayResource contentResource = new ByteArrayResource(content.replace("{{tenantId}}", tenantId)
            .getBytes(StandardCharsets.UTF_8)) {
        @Override
        public String getFilename() {
            return workflowFileName;
        }
    };
    contentResource.getFilename();

    // Post the workflow to the workflow engine
    final String workflowUrl = properties.getWorkflowEngine().getUrl()  + "process-api/repository/deployments";
    final MultiValueMap<String, Object> body = new LinkedMultiValueMap<>();
    body.add("file", contentResource);
    body.add("tenantId", tenantId);
    final RequestEntity<MultiValueMap<String, Object>> request = RequestEntity
            .post(new URI(workflowUrl))
            .accept(MediaType.APPLICATION_JSON)
            .contentType(MediaType.MULTIPART_FORM_DATA)
            .body(body);
    final ResponseEntity<Map<String, Object>> response = restTemplate.exchange(request,
            new ParameterizedTypeReference<>() {});
    if (response.getStatusCode() == HttpStatus.CREATED) {
        LOG.debug("Created workflow deployment [{}]", response.getBody());
    } else {
        LOG.error("Error creating workflow deployment [{}]", response.getStatusCode());
    }
}

Since I’m using a ByteArrayResource, I had to override getFilename() in order to add the filename to the content disposition:

Content-Disposition: form-data; name="file"; filename="Process_New_Hires.bpmn20.xml"
Content-Type: application/xml
Content-Length: 10805

Without that filename, I was getting 400 errors complaining about not providing a file.