Combine json response in nifi - apache-nifi

Question

We are calling invokehttp processes and getting response which json. Example
{
"id": "h569gcjhcm",
"doi": {
"id": "10.17632/h569gcjhcm.1",
"status": "allocated",
"prefix": "10.17632"
},
"name": "Data for: Flooding of the Caspian Sea at the intensification of Northern Hemisphere Glaciations",
"description": "Supplementary data for the Jeirankechmez section in Azerbaijan.\n\n- Appendix A contains all paleomagnetic data and interpretations of the Jeirankechmez section. This .dir file can be imported into the paleomagnetism.org webportal under \"Interpretation Portal\", \"Advanced Options\", \"Import Application Save\". For further details on the use of paleomagnetism.org please refer to the article by Koymans et al. (2016) - https://doi.org/10.1016/j.cageo.2016.05.007.\n- Appendix B contains the magnetic susceptibility data for the analysed samples, including geographic coordinates and stratigraphic levels.\n- Appendix C contains the 40Ar/39Ar data for the three analysed volcanic ash layers. ",
"version": 1,
"publish_date": "2019-01-29T12:51:38.090Z",
"data_licence": {
"id": "01d9c749-3c4d-4431-9df3-620b2dcfe144",
"short_name": "CC BY 4.0",
"full_name": "Creative Commons Attribution 4.0 International",
"description": "This dataset is licensed under a Creative Commons Attribution 4.0 International licence.\n\nWhat does this mean?\nYou can share, copy and modify this dataset so long as you give appropriate credit, provide a link to the CC BY license, and indicate if changes were made, but you may not do so in a way that suggests the rights holder has endorsed you or your use of the dataset. Note that further permission may be required for any content within the dataset that is identified as belonging to a third party.",
"url": "http://creativecommons.org/licenses/by/4.0",
"category": "Creative"
},
"contributors": [
{
"first_name": "Christiaan",
"last_name": "van Baak"
},
{
"first_name": "Marius",
"last_name": "Stoica"
},
{
"first_name": "Arjen",
"last_name": "Grothe"
},
{
"first_name": "Gareth",
"last_name": "Davies"
},
{
"profile_id": "72970719-95c8-341b-80d2-afa9e7154baf",
"first_name": "Wout",
"last_name": "Krijgsman"
},
{
"profile_id": "3a4bfe2c-4098-3859-9b88-789fa993e05a",
"first_name": "Keith",
"last_name": "Richards"
},
{
"profile_id": "f1660f3c-ebbd-3289-8240-1f4ea7913df4",
"first_name": "Klaudia",
"last_name": "Kuiper"
},
{
"first_name": "Elmira",
"last_name": "Aliyeva"
}
],
"versions": [
{
"version": 1,
"publish_date": "2019-01-29T12:51:38.090Z",
"available": true
}
],
"files": [
{
"filename": "Appendix_A_Jeirankechmez_pmag_interpretations.dir",
"id": "f2f4cba7-2411-4737-a9b2-f094db30dca1",
"content_details": {
"id": "994bc865-5300-4d76-a373-e528ccd830e8",
"sha256_hash": "2427c4b077372760973ce8224694f2a2ee5383c7f022ad818164d847a20e27cc",
"sha1_hash": "73792dc6d6eb2c1de1e04926ba5d4420dd0aaece",
"content_type": "application/x-director",
"size": 917022,
"created_date": "2019-01-03T00:00:00.000Z"
"download_expiry_time": "2019-01-29T13:52:25.729Z"
},
"metrics": {
"downloads": 0,
"previews": 0
}
},
{
"filename": "Appendix_B_Sample_locations_susceptibility.xlsx",
"id": "64241bf0-5279-49e8-a505-be9075b910e1",
"content_details": {
"id": "af8809d0-8e63-4599-abaa-e7af9ad39959",
"sha256_hash": "0588f44a0cbd477aa2798323e57ce0b2d4a118e767c0b1ffdc9eb1017e4d23c2",
"sha1_hash": "02e89f6f197ebf495e1e2c3d1aab250efc7545e7",
"content_type": "application/vnd.openxmlformats-officedocument.spreadsheetml.sheet",
"size": 24770,
"created_date": "2019-01-03T00:00:00.000Z"
,
"download_expiry_time": "2019-01-29T13:52:25.732Z"
},
"metrics": {
"downloads": 0,
"previews": 0
}
},
{
"filename": "Appendix_C_ArAr_data.xlsx",
"id": "2e912027-ff3f-48ad-98b9-b643b59ba0e3",
"content_details": {
"id": "4960377c-060d-41f6-b7af-150617d8ebeb",
"sha256_hash": "235dc32c1e99f350ee5c99908a5f5d72d1aeeab02f78c2e0181d585bd1880fa6",
"sha1_hash": "6483156e4577948cac5d2679eee862c76faed1c9",
"content_type": "application/vnd.openxmlformats-officedocument.spreadsheetml.sheet",
"size": 18510,
"created_date": "2019-01-03T00:00:00.000Z"
},
"metrics": {
"downloads": 0,
"previews": 0
}
}
],
"articles": [
{
"id": "10.1016/j.gloplacha.2019.01.007",
"title": "Flooding of the Caspian Sea at the intensification of Northern Hemisphere Glaciations",
"doi": "10.1016/j.gloplacha.2019.01.007",
"journal": {
"issn": "0921-8181",
"name": "Global and Planetary Change",
"url": "http://www.sciencedirect.com/science/journal/09218181"
}
}
],
"categories": [
{
"id": "http://com/vocabulary/OmniScience/Concept-170590667",
"label": "Geology"
},
{
"id": "http://data.elsevier.com/vocabulary/OmniScience/Concept-473860195",
"label": "Strontium Isotope"
}
],
"institutions": [ ],
"metrics": {
},
"available": true,
"related_links": [ ]
}
I am using $contributors.profile_id from above json to call new endpoint(invokeshttp) (https://api.xxx.com/profile/$.profile_id)
Json response for this
"contributors": [
{
“profile_id”:”cedferfiherhforhforf”
"first_name": “xxx”,
"last_name": "van Baak”,
“other_ids”:[] ,
“Other info”: “deeded” }
I have to call this endpoint depending upon number of object in contributor(let say we have 5 object in contributor ,so I have to call this endpoint 5 time)and combine these 5 response together
Then I have to merge the response(above response to the main response )

Answer 1

just an example:
EvaluateJsonPath to extract "id" into attribute, later join by this attribute
SplitJson to split your json by "contributors"
call endpoint
MergeContent merge by "id" and with count after SplitJson