Introduction
Accela APO records must be kept synchronized with EAS addresses in near real time. Regardless of how we build this it is convenient to think of this as a sort of custom replication service. We've already done this successfully with DBIs AVS as described here and here. That implementation has been used in production since February 15 2012.
Implementation
As of November 4, we have a working Accela implementation. Addresses that are created or changed on our DEV instance should replicate in near real time to a table named eas_flat_addresses on Accela GIS DEV. To accomplish this we use the ArcGIS rest API. When and address is created we call addFeatures; when an address is updated we use query and updateFeatures. Note that we do not delete address records. You can see the code here. You can also get some sense of how this works by examining the insert and update log file output.
Learning Curve
After some discussion, Mike and Paul have decided to try the simplest thing that could possibly work. In this case, this means using a flattened representation of EAS addresses. This should allow us to better understand Accela and how addresses work in Accela. We expect that we'll make some changes as we learn.
Next Steps
The issue list for this feature is here.
I'd also like to do the following before we get to much further down the road.
- design review
- code review
- discuss strategy for production cut-over from AVS to Accela (see this line) (currently hard coding timestamp)
Log File Output (Insert)
2012-11-04 20:32:02,494 - XMIT_ACCELA - INFO - posting JSON
2012-11-04 20:32:02,494 - XMIT_ACCELA - INFO - path:/ArcGIS/rest/services/EAS_Accela_Test/FeatureServer/2/addFeatures
2012-11-04 20:32:02,494 - XMIT_ACCELA - INFO - connectionString :10.19.51.238:80
2012-11-04 20:32:02,494 - XMIT_ACCELA - INFO - json features: [
{
"GEOMETRY": {
"Y": 2106429.8391464953,
"X": 6000111.418789571
},
"attributes": {
"EAS_UNIT_ADDRESS_ID": 725576,
"BASE_ADDRESS_NUM": 10000,
"OBJECTID": null,
"UNIT_ADDRESS": null,
"ADDRESS_X_PARCEL_CREATE_TMS": 1352061116477.258,
"STREET_NAME": "ROOSEVELT",
"UNIT_ADDRESS_CREATE_TMS": 1352061116477.258,
"ADDRESS_X_PARCEL_RETIRE_TMS": null,
"LONGITUDE": -122.44280195814189,
"PARCEL_BLOCK_LOT": "2618029",
"UNIT_ADDRESS_BASE_FLG": true,
"STREET_CNN": 11145000,
"BASE_ADDRESS_RETIRE_TMS": null,
"STREET_TYPE": "WAY",
"EAS_ADDRESS_X_PARCEL_ID": 563580,
"BASE_ADDRESS_SUFFIX": null,
"LATITUDE": 37.763860355079515,
"UNIT_ADDRESS_RETIRE_TMS": null,
"EAS_ADDRESS_BASE_ID": 483702,
"BASE_ADDRESS_CREATE_TMS": 1352044837254.029,
"ZIPCODE": "94114"
}
}
]
2012-11-04 20:32:02,790 - XMIT_ACCELA - INFO - response meta data: status: 200
reason: OK
version: 11
headers
date: Mon, 05 Nov 2012 04:30:51 GMT
content-length: 121
x-powered-by: ASP.NET
content-type: text/plain;charset=utf-8
server: Microsoft-IIS/7.5
2012-11-04 20:32:02,790 - XMIT_ACCELA - INFO - response content: {^M
"addResults" : [^M
{^M
"objectId" : 273623, ^M
"globalId" : null, ^M
"success" : true^M
}^M
]}
Log File Output (Update/Retire)
2012-11-04 21:21:27,184 - XMIT_ACCELA - INFO - connectionString: 10.19.51.238:80
2012-11-04 21:21:27,184 - XMIT_ACCELA - INFO - urlString: /ArcGIS/rest/services/EAS_Accela_Test/FeatureServer/2/query?where=eas_address_x_parcel_id=563580&returnIdsOnly=true&f=pjson
2012-11-04 21:21:28,726 - XMIT_ACCELA - INFO - posting JSON
2012-11-04 21:21:28,726 - XMIT_ACCELA - INFO - path:/ArcGIS/rest/services/EAS_Accela_Test/FeatureServer/2/updateFeatures
2012-11-04 21:21:28,726 - XMIT_ACCELA - INFO - connectionString :10.19.51.238:80
2012-11-04 21:21:28,727 - XMIT_ACCELA - INFO - json features: [
{
"GEOMETRY": {
"Y": 2106429.8391464953,
"X": 6000111.418789571
},
"attributes": {
"EAS_UNIT_ADDRESS_ID": 725576,
"BASE_ADDRESS_NUM": 10000,
"OBJECTID": 273623,
"UNIT_ADDRESS": null,
"ADDRESS_X_PARCEL_CREATE_TMS": 1352061116477.258,
"STREET_NAME": "ROOSEVELT",
"UNIT_ADDRESS_CREATE_TMS": 1352061116477.258,
"ADDRESS_X_PARCEL_RETIRE_TMS": 1352064082020.226,
"LONGITUDE": -122.44280195814189,
"PARCEL_BLOCK_LOT": "2618029",
"UNIT_ADDRESS_BASE_FLG": true,
"STREET_CNN": 11145000,
"BASE_ADDRESS_RETIRE_TMS": 1352064082020.226,
"STREET_TYPE": "WAY",
"EAS_ADDRESS_X_PARCEL_ID": 563580,
"BASE_ADDRESS_SUFFIX": null,
"LATITUDE": 37.763860355079515,
"UNIT_ADDRESS_RETIRE_TMS": 1352064082020.226,
"EAS_ADDRESS_BASE_ID": 483702,
"BASE_ADDRESS_CREATE_TMS": 1352044837254.029,
"ZIPCODE": "94114"
}
}
]
2012-11-04 21:21:28,922 - XMIT_ACCELA - INFO - response meta data: status: 200
reason: OK
version: 11
headers
date: Mon, 05 Nov 2012 05:20:17 GMT
content-length: 124
x-powered-by: ASP.NET
content-type: text/plain;charset=utf-8
server: Microsoft-IIS/7.5
2012-11-04 21:21:28,922 - XMIT_ACCELA - INFO - response content: {^M
"updateResults" : [^M
{^M
"objectId" : 273623, ^M
"globalId" : null, ^M
"success" : true^M
}^M
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