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Slack SDK block builder in spring boot

I'm constructing a message to be sent through my spring boot application.
I was testing out the templates and I have created one where most of the elements are static except a link that needs to be generated by the code and added to the Json.
Currently the Json message looks like this:
{
"blocks": [
{
"type": "context",
"elements": [
{
"type": "image",
"image_url": "https://api.slack.com/img/blocks/bkb_template_images/highpriority.png",
"alt_text": "High Priority"
},
{
"type": "mrkdwn",
"text": "*High Priority*"
}
]
},
{
"type": "divider"
},
{
"type": "section",
"text": {
"type": "mrkdwn",
"text": "*Hercules Platform Status Response failed Messages*"
}
},
{
"type": "divider"
},
{
"type": "section",
"text": {
"type": "mrkdwn",
"text": "*Please click the link to download the file*"
}
},
{
"type": "section",
"text": {
"type": "mrkdwn",
"text": "*<LINK|SOME_LINK>*"
}
}
]
}
I'm not sure how to construct this Json in my spring boot application. Since most of it is static, should I just load this template as a string and append the last link section?
I'm not able to figure out the slack classes in java to build such a message.

How to include the full object instead of "contained" in HAPI FHIR

I am very new to hapi FHIR, I am trying to encode the request in following format.
CoverageEligibilityRequest coverageEligibilityRequest = new CoverageEligibilityRequest();
Patient patient = new Patient().addIdentifier(new Identifier().setType(getPatientIdentifierCodeableConcept()).setSystem("http://www.abc.xyz").setValue("123"));
coverageEligibilityRequest.setPatient(new Reference(patient));
Above code is java snippet for populating the patient in CoverageEligibilityRequest.
{
"resourceType": "Bundle",
"type": "batch",
"entry": [ {
"resource": {
"resourceType": "CoverageEligibilityRequest",
"id": "7890",
"contained": [ {
"resourceType": "Patient",
"id": "1",
"identifier": [ {
"type": {
"coding": [ {
...
...
}
But I want the request should be of following format
{
"resourceType": "Bundle",
"type": "batch",
"entry": [ {
"resource": {
"resourceType": "CoverageEligibilityRequest",
"id": "7890",
"patient": {
"type": "Patient",
"identifier": {
"type": {
"coding": [ {
...
...
} ]
},
where I want to omit contained with actual string?

FHIR doesn't generally let you express an entire graph of objects as a single resource, so if you're trying to send a Patient resource as part of a CoverageEligibilityRequest resource, the only way you can do that is by setting the patient in the contained field. The CoverageEligibilityResource.patient field is defined as a Reference type and so can only contain the data allowed by a Reference data type and not arbitrary data.
It seems like what you actually want to do is to add a Patient to the HAPI FHIR server and a CoverageEligibilityRequest resource that references the patient. The right way to do this in FHIR is to construct a single batch or transaction bundle containing both of the resources. Basically, you want to construct a Bundle that looks something like this:
{
"resourceType": "Bundle",
"type": "batch",
"entry": [ {
"resource": {
"resourceType": "Patient",
"id": "1",
"identifier": [ {
"type": {
"coding": [ {
...
}
}, {
"resource": {
"resourceType": "CoverageEligibilityRequest",
"id": "7890",
"patient": "Patient/1",
...
The easiest way to construct something similar in HAPI FHIR would be to use a transaction bundle like this:
IGenericClient client = ...
CoverageEligibilityRequest coverageEligibilityRequest = new CoverageEligibilityRequest();
Patient patient = new Patient().addIdentifier(new Identifier().setType(getPatientIdentifierCodeableConcept()).setSystem("http://www.abc.xyz").setValue("123"));
coverageEligibilityRequest.setPatient(new Reference(patient));
client.transaction().withResources(patient, coverageEligibilityRequest);

How to pass formData for POST request in swagger.json?

In my play framework application, I have registered APIs in route file as:
POST /api/rmt-create-request controllers.Api.CreateRMTRequestForm
On action of controller, I am using following code to access formData submitted with form submit as :
public Result CreateRMTRequestForm()
{
Map<String, String[]> params = request().body().asMultipartFormData().asFormUrlEncoded();
Its working fine as API when I submit the form with forntend application.
I am trying to create APIs documentation with swagger.ui in which within swagger.json file I have written following JSON data.
"paths": {"/api/rmt-create-request": {
"post": {
"tags": [
"RMT APIs"
],
"description" : "Return newly created request data",
"operationId": "create-new-rmt-request",
"consumes": ["application/x-www-form-urlencoded"],
"parameters": [
{
"name": "rootNodeName",
"in": "formData",
"description": "Root node class name for item",
"schema": {
"type": "string"
}
}
],
"responses": {
"200": {
"description": "OK",
"content": {
"application/json": {
"schema": {
"$ref": "#/components/schemas/rmt-request-data"
}
}
}
},
"default": {
"$ref": "#/components/responses/default"
}
}
}
},
While inspecting RequestHeader data, its not showing content-Type property with value 'multipart/form-data' as well as formData are not attached, which makes controller to throw null exception.
Can anyone help whats missing in swagger.json file ?

You are mixing OpenAPI 2.0 and 3.0 syntax.
In OpenAPI 3.0, request body (including form data) is defined using the requestBody keyword instead of in: formData parameters.
Also, OAS3 does not use consumes. The media types consumed by the operation are specified inside the requestBody.
"paths": {
"/api/rmt-create-request": {
"post": {
"tags": [
"RMT APIs"
],
"description": "Return newly created request data",
"operationId": "create-new-rmt-request",
"requestBody": {
"content": {
"multipart/form-data": { // or "application/x-www-form-urlencoded" - depending on what you need
"schema": {
"type": "object",
"properties": {
"rootNodeName": {
"type": "string",
"description": "Root node class name for item"
}
}
}
}
}
}
}
}
}
More information: Describing Request Body

Sending field metadata to client in Spring

I want my client to be able to request metadata about a #RequestMapping, like the #Size and #Length values of each field. Does Spring have a way of doing this?

Closest thing might be Spring HATEOAS Affordances for HAL forms.
Spring HATEOAS Affordances
Responses produce output which includes all the metadata about the request model along with validation rules and method.
{
"_embedded": {
"employees": [...]
},
"_links": {
"self": {
"href": "http://localhost:8080/employees"
}
},
"_templates": {
"default": {
"title": null,
"method": "post",
"contentType": "",
"properties":[
{
"name": "firstName",
"required": true
},
{
"name": "id",
"required": true
},
{
"name": "lastName",
"required": true
},
{
"name": "role",
"required": true
}
]
}
}
}

how to send HTTP Post request using jersey with a complex parameter

I need to send a HTTP Post to a REST API with the following complex type as parameters. I looked at the documentation of jersey and it helps only to send a key value pair. How can i send a HTTP Post request with the below parameters using jersey.
{
"key": "example key",
"message": {
"html": "<p>Example HTML content</p>",
"text": "Example text content",
"subject": "example subject",
"from_email": "message.from_email#example.com",
"from_name": "Example Name",
"to": [
{
"email": "recipient.email#example.com",
"name": "Recipient Name"
}
],
"headers": {
"Reply-To": "message.reply#example.com"
},
"important": false,
"track_opens": null,
"track_clicks": null,
"auto_text": null,
"auto_html": null,
"inline_css": null,
"url_strip_qs": null,
"preserve_recipients": null,
"view_content_link": null,
"bcc_address": "message.bcc_address#example.com",
"tracking_domain": null,
"signing_domain": null,
"return_path_domain": null,
"merge": true,
"global_merge_vars": [
{
"name": "merge1",
"content": "merge1 content"
}
],
"merge_vars": [
{
"rcpt": "recipient.email#example.com",
"vars": [
{
"name": "merge2",
"content": "merge2 content"
}
]
}
],
"tags": [
"password-resets"
],
"subaccount": "customer-123",
"google_analytics_domains": [
"example.com"
],
"google_analytics_campaign": "message.from_email#example.com",
"metadata": {
"website": "www.example.com"
},
"recipient_metadata": [
{
"rcpt": "recipient.email#example.com",
"values": {
"user_id": 123456
}
}
],
"attachments": [
{
"type": "text/plain",
"name": "myfile.txt",
"content": "ZXhhbXBsZSBmaWxl"
}
],
"images": [
{
"type": "image/png",
"name": "IMAGECID",
"content": "ZXhhbXBsZSBmaWxl"
}
]
},
"async": false,
"ip_pool": "Main Pool",
"send_at": "example send_at"
}
I looked at the other questions of sending HTTP Post using Jersey and all I could find was a way to only send a key\value pairs as parameters and not complex string types like above.

You should look at JAXB, it allows you to "automatically" build "complex parameters" out of "objects". Basically the procedure would be to define a class that represents the data structure you present as request message the REST API resource accepts, then populate it with the data your want to POST and send it. In this question you can find more details on how to exactly do that: Can jersey clients POST a JAXB object to the server using JSON?