API

The API handles all external calls to the system in a RESTful manner. The back-end here uses the webmachine which is written in erlang. The webmachine will receive calls on port 8000 and then reroute them to the appropriate module which will handle the call. The examples below are done with the current version of develop at the time of the creation of this page, (2013-11-05, 16:03). All fields are not available for all operations in the API. This is a conscious decision to prevent users from corrupting data.

Creating

##Creating a User

###Fields ####Accepted Fields

username - string
private - boolean

A user is created by doing a POST request to the API at the users tab, i.e. <API-URI>/users, where you send along a JSON object that is the user that you want to create.

###Example (webmachine running locally):

user@host ~ $ curl -XPOST 'localhost:8000/users' -H "Content-type: application/json" -d '{"username" : "Tomas"}'

Response:

{"ok":true,"_index":"sensorcloud","_type":"user","_id":"E9ECUfb3Q6eNq6e8d1pgUg","_version":1}

This has now added the given user document to the system and it was assigned the id E9ECUfb3Q6eNq6e8d1pgUg from elastic search, the document is of type user, under index sensorcloud, the post was ok and the document now have version one.

##Creating a Resource

###Fields ####Accepted Fields

user_id - string
name - string
tags - string
model - string
description - string
type - string
manufacturer - string
uri - string
polling_freq - integer
creation_date - date
uuid - string
active - boolean
location - geo_point

####Restricted Fields

creation_date - date

A resource is created by doing a POST request to the API at the resources tab, i.e. <API-URI>/resources, where you send along a JSON object that is the resource that you want to create. Creation date will soon be changed so it is generated server side so then that field should not be part of the document here.

###Example (webmachine running locally):

user@host ~ $ curl -XPOST 'localhost:8000/resources' -H "Content-type: application/json" -d '{"user_id":"E9ECUfb3Q6eNq6e8d1pgUg","name":"Resource1","tags":"temperature,Uppsala","description":"Temperature in Uppsala","type":"Temperature","manufacturer":"Ericsson","model":"MES013","make":"23","serial":"0943123","location":"59.8581,17.6447","active":"true","uri":"http://uppsala.com","polling_freq":"20","creation_date":"2013-09-23"}'

Response:

{"ok":true,"_index":"sensorcloud","_type":"resource","_id":"yYiUDG6QRfiVt2ey37AuDA","_version":1}

This has now added the resource document to the system and it was assigned the id yYiUDG6QRfiVt2ey37AuDA from elastic search, the document is of type resource, under index sensorcloud, the post was ok and the document now have version one.

##Creating a Stream

###Fields ####Accepted Fields

resource_id - string
name - string
tags - string
description - string
private - boolean
type - string
accuracy - float
min_val - float
max_val - float
active - boolean
location - geo_point

####Restricted Fields

quality - float
user_ranking - double
subscribers - integer
last_update - date
creation_date - date
history_size - long

A stream is created by doing a POST request to the API at the stream tab, i.e. <API-URI>/streams, where you send along a JSON object that is the stream that you want to create. You can also do requests to <API-URI>/users/<UID>/resources/<RID>/streams and then the field "resource_id" will be added to the document with the value "rid". Creation date will soon be changed so it is generated server side so then that field should not be part of the document here.

###Example (webmachine running locally):

user@host ~ $ curl -XPOST 'localhost:8000/streams' -H "Content-type: application/json" -d '{"resource_id":"yYiUDG6QRfiVt2ey37AuDA","name":"Stream1","tags":"temperature,celsius,Norrtalje","description":"Temperature in Celsius in Norrtalje","private":"false","type":"Temperature","unit":"celsius","accuracy":0.95,"min_val":-50.0,"max_val":50.0,"active":"true","user_ranking":10.0,"subscribers":6,"last_updated":"2013-10-05T010502.0000", "creation_date":"2013-10-01","history_size": 5000,"location":"59.7667,18.7000"}'

Response:

{"ok":true,"_index":"sensorcloud","_type":"stream","_id":"lEUbrYY3RT-VY-rdffE2Ug","_version":1}

This has now added the stream document to the system and it was assigned the id lEUbrYY3RT-VY-rdffE2Ug from elastic search, the document is of type stream, under index sensorcloud, the post was ok and the document now have version one. (add example for the other URI)

##Creating a Data-Point

###Fields ####Accepted Fields

stream_id - string
timestamp - date
value - double

A data-point is created by doing a POST request to the API at the data tab of the stream it belongs to, i.e. <API-URI>/streams/<SID>/data, where you send along a JSON object that is the data-point that you want to create. Timestamp will soon be changed so it is generated server side so then that field should not be part of the document here.

###Example (webmachine running locally):

user@host ~ $ curl -XPOST 'localhost:8000/streams/lEUbrYY3RT-VY-rdffE2Ug/data' -H "Content-type: application/json" -d '{"timestamp" : "20131105T114543.0000", "value" : -2.5}'

Response:

{"ok":true,"_index":"sensorcloud","_type":"datapoint","_id":"EKeFQx-FR1CyCxiL4QXpHg","_version":1}

This has now added the given data-point document to the system, with the field "streamid" added with value of the given stream id, and it was assigned the id EKeFQx-FR1CyCxiL4QXpHg from elastic search, the document is of type data-point, under index sensorcloud, the post was ok and the document now have version one.

##Creating a Virtual-Stream

###Fields ####Accepted Fields

user_id - string
name - string
tags - string
description - string
private - boolean
streams_involved - string
function - string

####Restricted Fields

last_update - date
creation_date - date
history_size - long

A virtual stream is created by doing a POST request to the API at the vstreams tab, i.e. <API-URI>/vstreams, where you send along a JSON object that is the virtual stream that you want to create and provides information about the streams involved and the function it applies on them. Creation date will soon be changed so it is generated server side so then that field should not be part of the document here. Also, history_size and last_update will be automatically updated. The functions currently supported are "mean"(average), "total"(sum), "min", "max", "diff"(on one stream, the difference between a new value and the previous one). When posting a virtual stream, there will be an aggregation on the streams' history over time and VSdatapoints will be posted. "Diff" is not applied on the history. TimestampFrom needs to be provided and specifies a starting point for when aggregating the history of the streams. Examples: "20131105T114543.0000", "now-1h", "now-1d" etc. Finally, the user must specify the time interval for the aggregation of the history over time(as 2nd parameter in the function list). Examples: 1s, 1m etc.

###Example (webmachine running locally):

user@host ~ $ curl -XPOST 'localhost:8000/vstreams' -H "Content-type: application/json" -d '{"user_id":"my_user","name":"VStream1","tags":"average,temperature,celsius,uppsala","description":"Average Temperature in Celsius in Uppsala","private":"false","timestampfrom" : "now-1w","streams_involved": ["Ef47PMuKS3CQY9hQTxgh3g", "8Cg5YBsDT8q9M0ttVc8vHA"],"function":["mean", "2s"]}'

Response:

{"ok":true,"_index":"sensorcloud","_type":"virtual_stream","_id":"sty7PaSnSJqIt4VDtkSaHA","_version":1}

Reading

Reading a User or listing several Users

A user is read by doing a GET request to the API at the users tab with the id of the user you want, i.e. <API-URI>/users/<UID> or if you want to list all users do a GET request to the users tab, i.e. <API-URI>/users.

Example (webmachine running locally):

user@host ~ $ curl -XGET 'localhost:8000/users/E9ECUfb3Q6eNq6e8d1pgUg'

Response:

{"id":"E9ECUfb3Q6eNq6e8d1pgUg","username":"Tomas"}

This will return the user document specified by the user id.

user@host ~ $ curl -XGET 'localhost:8000/users'

Response:

{"users":[{"id":"E9ECUfb3Q6eNq6e8d1pgUg","username":"Tomas"}]}

This will return of all user documents currently in the system.

Reading a Resource or listing several Resources

A resource is read by doing a GET request to the API at the resources tab with the id of the resource you want, i.e. <API-URI>/resources/<UID>, listing all resources in the system is not allowed, if you want to list all resources belonging to a user do a get request to the same tab but before specify the user under the users tab, i.e. <API-URI>/users/<UID>/resources.

Example (webmachine running locally):

user@host ~ $ curl -XGET 'localhost:8000/resources/yYiUDG6QRfiVt2ey37AuDA'

Response:

{"active":"true","creation_date":"2013-09-23","description":"Temperature in Uppsala","id":"yYiUDG6QRfiVt2ey37AuDA","location":"59.8581,17.6447","make":"23","manufacturer":"Ericsson","model":"MES013","name":"Resource1","polling_freq":"20","serial":"0943123","tags":"temperature,Uppsala","type":"Temperature","uri":"http://uppsala.com","user_id":"E9ECUfb3Q6eNq6e8d1pgUg"}

This will return the resource document specified by the resource id.

user@host ~ $ curl -XGET 'localhost:8000/users/E9ECUfb3Q6eNq6e8d1pgUg/resources'

Response:

{"resources":[{"active":"true","creation_date":"2013-09-23","description":"Temperature in Uppsala","id":"yYiUDG6QRfiVt2ey37AuDA","location":"59.8581,17.6447","make":"23","manufacturer":"Ericsson","model":"MES013","name":"Resource1","polling_freq":"20","serial":"0943123","tags":"temperature,Uppsala","type":"Temperature","uri":"http://uppsala.com","user_id":"E9ECUfb3Q6eNq6e8d1pgUg"}]}

This will return of all resource documents owned by user with the given user id currently in the system.

Reading a Stream or listing several Streams

A stream is read by doing a GET request to the API at the streams tab with the id of the stream you want, i.e. <API-URI>/streams/<SID> or if you want to list all streams do a GET request to the streams tab, i.e. <API-URI>/streams, if you want to list all streams belonging to a resource do a get request to the same tab but before specify the user and resource, i.e. <API-URI>/users/<UID>/resources/<RID>/streams.

Example (webmachine running locally):

user@host ~ $ curl -XGET 'localhost:8000/streams/lEUbrYY3RT-VY-rdffE2Ug'

Response:

{"accuracy":0.95,"active":"true","creation_date":"2013-10-01","description":"Temperature in Celsius in Norrtalje","history_size":5000,"id":"lEUbrYY3RT-VY-rdffE2Ug","last_updated":"2013-10-05T010502.0000","location":"59.7667,18.7000","max_val":50.0,"min_val":-50.0,"name":"Stream1","private":"false","resource_id":"yYiUDG6QRfiVt2ey37AuDA","subscribers":6,"tags":"temperature,celsius,Norrtalje","type":"Temperature","unit":"celsius","user_ranking":10.0}

This will return the stream document specified by the given stream id.

user@host ~ $ curl -XGET 'localhost:8000/streams'

Response:

{"streams":[{"accuracy":0.95,"active":"true","creation_date":"2013-10-01","description":"Temperature in Celsius in Norrtalje","history_size":5000,"id":"lEUbrYY3RT-VY-rdffE2Ug","last_updated":"2013-10-05T010502.0000","location":"59.7667,18.7000","max_val":50.0,"min_val":-50.0,"name":"Stream1","private":"false","resource_id":"yYiUDG6QRfiVt2ey37AuDA","subscribers":6,"tags":"temperature,celsius,Norrtalje","type":"Temperature","unit":"celsius","user_ranking":10.0}]}

This will return of all stream documents currently in the system.

user@host ~ $ curl -XGET 'localhost:8000/users/E9ECUfb3Q6eNq6e8d1pgUg/resources/yYiUDG6QRfiVt2ey37AuDA/streams'

Response:

{"streams":[{"accuracy":0.95,"active":"true","creation_date":"2013-10-01","description":"Temperature in Celsius in Norrtalje","history_size":5000,"id":"lEUbrYY3RT-VY-rdffE2Ug","last_updated":"2013-10-05T010502.0000","location":"59.7667,18.7000","max_val":50.0,"min_val":-50.0,"name":"Stream1","private":"false","resource_id":"yYiUDG6QRfiVt2ey37AuDA","subscribers":6,"tags":"temperature,celsius,Norrtalje","type":"Temperature","unit":"celsius","user_ranking":10.0}]}

This will return of all stream documents owned by resource with the given resource id currently in the system.

Reading a Data-Point or listing several Data-Points

A data-point can not currently be read individually but you can list all the data points belonging to a stream by doing a GET request to the data tab of the stream you want the data from, i.e. <API-URI>/streams/<SID>/data.

Example (webmachine running locally):

user@host ~ $ curl -XGET 'localhost:8000/streams/lEUbrYY3RT-VY-rdffE2Ug/data'

Response:

{"data":[{"id":"EKeFQx-FR1CyCxiL4QXpHg","streamid":"lEUbrYY3RT-VY-rdffE2Ug","timestamp":"20131105T114543.0000","value":-2.5}]}

This will return of all data-point documents owned by the stream with the given stream id currently in the system.

Reading a Virtual-Stream or listing several Virtual-Streams

A virtual stream is read by doing a GET request to the API at the vstreams tab with the id of the vstream asked, i.e. <API-URI>/vstreams/<VSID> or if you want to list all virtual streams do a GET request to the streams tab, i.e. <API-URI>/vstreams, if you want to list all streams belonging to a resource do a get request to the same tab but before specify the user and resource, i.e. <API-URI>/users/<UID>/resources/<RID>/vstreams.

Examples (webmachine running locally):

user@host ~ $ curl -XGET 'localhost:8000/vstreams/lEUbrYY3RT-VY-rdffE2Ug'

Response:

{"creation_date":"2013-12-17","description":"some_descr","function":["diff"],"history_size":3,"id":"weDGTMe5RvuT8XBMg-yTYw","last_updated":"2013-12-17T16:43:37.869","name":"myvstream2","streams_involved":["Ef47PMuKS3CQY9hQTxgh3g"],"timestampfrom":"now-1w","user_id":"testuser"}

This will return the virtual stream document specified by the given stream id.

user@host ~ $ curl -XGET 'localhost:8000/vstreams'

Response:

{"users":[{"creation_date":"2013-12-18","description":"some_descr","function":["mean","2s"],"history_size":5,"id":"sty7PaSnSJqIt4VDtkSaHA","last_updated":"2013-12-17T16:43:36.000","name":"myvstream2","streams_involved":["Ef47PMuKS3CQY9hQTxgh3g","8Cg5YBsDT8q9M0ttVc8vHA"],"timestampfrom":"now-1w","user_id":"testuser"},{"creation_date":"2013-12-17","description":"some_descr","function":["diff"],"history_size":3,"id":"weDGTMe5RvuT8XBMg-yTYw","last_updated":"2013-12-17T16:43:37.869","name":"myvstream2","streams_involved":["Ef47PMuKS3CQY9hQTxgh3g"],"timestampfrom":"now-1w","user_id":"testuser2"}]}

This will return of all public virtual stream documents currently in the system.

user@host ~ $ curl -XGET 'localhost:8000/users/test_user/vstreams'

Response:

{"users":[{"creation_date":"2013-12-18","description":"some_descr","function":["mean","2s"],"history_size":5,"id":"sty7PaSnSJqIt4VDtkSaHA","last_updated":"2013-12-17T16:43:36.000","name":"myvstream2","streams_involved":["Ef47PMuKS3CQY9hQTxgh3g","8Cg5YBsDT8q9M0ttVc8vHA"],"timestampfrom":"now-1w","user_id":"test_user"}]}

Reading a VSData-Point or listing several VSData-Points

A virtual stream data-point can not currently be read individually but you can list all the vsdata-points belonging to a virtual stream by doing a GET request to the data tab of the vstream you want the data from, i.e. <API-URI>/vstreams/<SID>/data.

Example (webmachine running locally):

user@host ~ $ curl -XGET 'localhost:8000/vstreams/lEUbrYY3RT-VY-rdffE2Ug/data'

Response:

{"data":[{"id":"8yqXYdnxT9ew7Bg96dR6eA","stream_id":"weDGTMe5RvuT8XBMg-yTYw","timestamp":"2013-12-17T16:43:37.869","value":3.0},{"id":"bhz-tm1oTvu901syAPoUVg","stream_id":"weDGTMe5RvuT8XBMg-yTYw","timestamp":"2013-12-17T16:42:56.311","value":6.0},{"id":"pMUdBDk6RQagPPi5Q1yj4Q","stream_id":"weDGTMe5RvuT8XBMg-yTYw","timestamp":"2013-12-17T16:43:19.184","value":10.0}]}

Updating

###Fields ####Accepted Fields

username - string
private - boolean

Updating a User

A user is updated by doing a PUT request to the API at the users tab with the id of the user you want to update, i.e. <API-URI>/users/<UID>. This update will happen in a field by field fashion, i.e. that a field in the document in the system will only change value if the field is specified in the update document that is passed to webmachine.

Example (webmachine running locally):

user@host ~ $ curl -XPUT 'localhost:8000/users/E9ECUfb3Q6eNq6e8d1pgUg' -H "Content-type: application/json" -d '{"username" : "Andreas"}'

Response (now):

{"_index":"sensorcloud","_type":"user","_id":"E9ECUfb3Q6eNq6e8d1pgUg","_version":1,"exists":true,"_source":{"username":"Tomas"}}

The Response should look like this, it will be changed soon:

{"ok":true,"_index":"sensorcloud","_type":"user","_id":"E9ECUfb3Q6eNq6e8d1pgUg","_version":2}

This will now update the user document with the given user id to have the new username of Andreas, all the other fields will have the same values as before the update.

Updating a Resource

###Fields ####Accepted Fields

user_id - string
name - string
tags - string
model - string
description - string
type - string
manufacturer - string
uri - string
polling_freq - integer
creation_date - date
uuid - string
active - boolean
location - geo_point

####Restricted Fields

creation_date - date

A resource is updated by doing a PUT request to the API at the resources tab with the id of the resource you want to update, i.e. <API-URI>/resources/<RID>. This update will happen in a field by field fashion, i.e. that a field in the document in the system will only change value if the field is specified in the update document that is passed to webmachine.

Example (webmachine running locally):

user@host ~ $ curl -XPUT 'localhost:8000/resources/yYiUDG6QRfiVt2ey37AuDA' -H "Content-type: application/json" -d '{"name" : "Resource0","description":"Temperature in Uppsala Centrum"}'

Response:

{"ok":true,"_index":"sensorcloud","_type":"resource","_id":"yYiUDG6QRfiVt2ey37AuDA","_version":2}

This will now update the resource document with the given resource id to have the new name of Resource0 and the new description of Temperature in Uppsala Centrum, all the other fields will have the same values as before the update.

Updating a Stream

###Fields ####Accepted Fields

resource_id - string
name - string
tags - string
description - string
private - boolean
type - string
accuracy - float
min_val - float
max_val - float
active - boolean
location - geo_point

####Restricted Fields

quality - float
user_ranking - double
subscribers - integer
last_update - date
creation_date - date
history_size - long

A stream is updated by doing a PUT request to the API at the streams tab with the id of the stream you want to update, i.e. <API-URI>/streams/<SID>. This update will happen in a field by field fashion, i.e. that a field in the document in the system will only change value if the field is specified in the update document that is passed to webmachine.

Example (webmachine running locally):

user@host ~ $ curl -XPUT 'localhost:8000/streams/lEUbrYY3RT-VY-rdffE2Ug' -H "Content-type: application/json" -d '{"name" : "Stream0","description":"Temperature in Uppsala Centrum in Celsius"}'

Response:

{"ok":true,"_index":"sensorcloud","_type":"stream","_id":"lEUbrYY3RT-VY-rdffE2Ug","_version":2}

This will now update the stream document with the given stream id to have the new name of Stream0 and the new description of Temperature in Uppsala Centrum in Celsius, all the other fields will have the same values as before the update.

Updating a Data-Point

Not allowed in the system.

Updating a Virtual-Stream

Not implemented yet.

Updating a Group

Not implemented yet.

Deleting

Deleting a User

A user is deleted by doing a DELETE request to the API at the users tab with the id of the user you want to delete, i.e. <API-URI>/users/<UID>.

Example (webmachine running locally):

user@host ~ $ curl -XDELETE 'localhost:8000/users/E9ECUfb3Q6eNq6e8d1pgUg'

Response:

{"ok":true,"found":true,"_index":"sensorcloud","_type":"user","_id":"E9ECUfb3Q6eNq6e8d1pgUg","_version":3}

This has now deleted the user document with the given user id from the Elastic-Search data store.This should also delete all resource documents owned by the given user id and all streams and virtual streams that belong to these resources and delete all the data-points and vsdatapoints belonging to them.

Deleting a Resource

A resource is deleted by doing a DELETE request to the API at the resources tab with the id of the resource you want to delete, i.e. <API-URI>/resources/<RID>.

Example (webmachine running locally):

user@host ~ $ curl -XDELETE 'localhost:8000/resources/yYiUDG6QRfiVt2ey37AuDA'

Response:

{"ok":true,"found":true,"_index":"sensorcloud","_type":"resource","_id":"yYiUDG6QRfiVt2ey37AuDA","_version":3}

This has now deleted the resource document with the given resource id from the Elastic-Search data store. This will also delete all stream documents owned by the given resource id and should also delete all the data-points belonging to these streams but this is not implemented yet.

Deleting a Stream

A stream is deleted by doing a DELETE request to the API at the stream tab with the id of the stream you want to delete, i.e. <API-URI>/streams/<SID>.

Example (webmachine running locally):

user@host ~ $ curl -XDELETE 'localhost:8000/streams/lEUbrYY3RT-VY-rdffE2Ug'

Response:

{"ok":true,"found":true,"_index":"sensorcloud","_type":"stream","_id":"lEUbrYY3RT-VY-rdffE2Ug","_version":3}

This has now deleted the stream document with the given stream id from the Elastic-Search data store. This will also delete all the data-points owned by the given stream id.

Deleting a Data-Point

You are currently not allowed to delete data-points without also deleting the stream they are owned by so there is no call for deleting just data-points.

Deleting a Virtual-Stream

Not implemented yet.

Deleting a Group

Not implemented yet.

Searching

Searching for Users

Not implemented yet.

Searching for Resources

Resources are searched by doing a POST request to the API at the resources tab with the _search operation and sending the JSON with the query. <API-URI>/resources/_search.

Parameters:

Size - It allows you to configure the maximum amount of hits to be returned.
From - It defines the offset from the first result you want to fetch.

Example (webmachine running locally):

user@host ~ $ curl -XPOST 'localhost:8000/users/E9ECUfb3Q6eNq6e8d1pgUg/resources/_search' -H "Content-Type: application/json" -d '{"query" : {"query_string" : {"query" : "Temperature"}}}'

Response:

{"took":28,"timed_out":false,"_shards":{"total":5,"successful":5,"failed":0},"hits":{"total":1,"max_score":1.0,"hits":[{"_index":"sensorcloud","_type":"resource","_id":"ijX1afSDQcWQg3fXfkq0oQ","_score":1.0,"_source":{"user_id":"E9ECUfb3Q6eNq6e8d1pgUg","name":"Resource1","tags":"temperature,Uppsala","description":"Temperature in Uppsala","type":"Temperature","manufacturer":"Ericsson","model":"MES013","make":"23","serial":"0943123","location":"59.8581,17.6447","active":"true","uri":"http://uppsala.com","polling_freq":"20","creation_date":"2013-09-23"}}]}}

This will return all the resources from the Elastic-Search data store. In the JSON you can use all the queries types avaiable in ElasticSearch.

Searching for Streams

Streams are searched by doing a POST request to the API at the streams tab with the _search operation and sending the JSON with the query. <API-URI>/streams/_search.

Parameters:

Size - It allows you to configure the maximum amount of hits to be returned.
From - It defines the offset from the first result you want to fetch.

Example (webmachine running locally):

user@host ~ $ curl -XPOST 'localhost:8000/streams/_search'  -H "Content-Type: application/json" -d '{"query" : {"query_string" : {"query" : "Norrtalje"}}}'

Response:

{"took":22,"timed_out":false,"_shards":{"total":5,"successful":5,"failed":0},"hits":{"total":1,"max_score":1.0,"hits":[{"_index":"sensorcloud","_type":"stream","_id":"EjOuve1EQ-qgD_Q55LpYLQ","_score":1.0,"_source":{"resource_id":"yYiUDG6QRfiVt2ey37AuDA","name":"Stream1","tags":"temperature,celsius,Norrtalje","description":"Temperature in Celsius in Norrtalje","private":"false","type":"Temperature","unit":"celsius","accuracy":0.95,"min_val":-50.0,"max_val":50.0,"active":"true","user_ranking":10.0,"subscribers":6,"last_updated":"2013-10-05T010502.0000", "creation_date":"2013-10-01","history_size": 5000,"location":"59.7667,18.7000"}}]}}

This will return all the streams from the Elastic-Search data store. In the JSON you can use all the queries types avaiable in ElasticSearch.

Searching for Data-Points

Datapoints are searched by doing a POST or GET request to the API at the data tab with the _search operation and sending the JSON with the query. <API-URI>/streams/_search.

Parameters:

timeStampFrom - Starting timestamp to be returned.
timeStampTo - It defines the offset from the first result you want to fetch.

Examples:

user@host ~ $ curl -XPOST localhost:8000/streams/Stream_Id/data/_search -d '{
		"size" : 100,
		query:{
 		   "filtered" : {
 		       "query" : {
  		          "term" : { "streamid" : Stream_Id }
  		      }, "filter" : {  "range" : {    "timestamp" : {"gte" : timestampFromValue,"lte" : timestampToValue}}}}
		 },"sort" : [{"timestamp" : {"order" : "asc"}}]  }'

user@host ~ $ curl -XGET 'localhost:8000/streams/Stream_Id/data/_search\?timestampFrom\=timestampFromValue\&timestampTo\=timestampToValue'

user@host ~ $ curl -XGET 'localhost:8000/streams/Stream_Id/data/_search\?timestampFrom\=timestampFromValue'

In both GET cases the datapoints are returned sorted.

Searching for Virtual-Streams

Not implemented yet.

Searching for Groups

Not implemented yet.

General Search

In order to do a basic search through all the data in the data store, you can use the general search. Streams, groups and users are searched by doing a POST request to the API with the _search operation and sending the JSON with the query. <API-URI>/_search.

Parameters:

Size - It allows you to configure the maximum amount of hits to be returned.
From - It defines the offset from the first result you want to fetch.
Sort - It allows to add one or more sort on specific fields.

Example (webmachine running locally):

user@host ~ $ curl -XPOST 'localhost:8000/_search'  -H "Content-Type: application/json" -d '{"query" : {"query_string" : { "query" : "Norrtalje"}}}'

Response:

{"streams": {"took":12,"timed_out":false,"_shards":{"total":5,"successful":5,"failed":0},"hits":{"total":1,"max_score":1.0,"hits":[{"_index":"sensorcloud","_type":"stream","_id":"EjOuve1EQ-qgD_Q55LpYLQ","_score":1.0,"_source":{"resource_id":"yYiUDG6QRfiVt2ey37AuDA","name":"Stream1","tags":"temperature,celsius,Norrtalje","description":"Temperature in Celsius in Norrtalje","private":"false","type":"Temperature","unit":"celsius","accuracy":0.95,"min_val":-50.0,"max_val":50.0,"active":"true","user_ranking":10.0,"subscribers":6,"last_updated":"2013-10-05T010502.0000", "creation_date":"2013-10-01","history_size": 5000,"location":"59.7667,18.7000"}]
"users":{"took":12,"timed_out":false,"_shards":{"total":5,"successful":5,"failed":0},"hits":{"total":1,"max_score":1.0,"hits":[{"_index":"sensorcloud","_type":"user","_id":"E9ECUfb3Q6eNq6e8d1pgUg","_score":1.0,"_source":{"username" : "Norrtalje"}}]}}

This will return all the streams, users and groups from the Elastic-Search data store. In the JSON you can use all the queries types avaiable in ElasticSearch.

API

Creating

Reading

Reading a User or listing several Users

Example (webmachine running locally):

Reading a Resource or listing several Resources

Example (webmachine running locally):

Reading a Stream or listing several Streams

Example (webmachine running locally):

Reading a Data-Point or listing several Data-Points

Example (webmachine running locally):

Reading a Virtual-Stream or listing several Virtual-Streams

Examples (webmachine running locally):

Reading a VSData-Point or listing several VSData-Points

Example (webmachine running locally):

Updating

Updating a User

Example (webmachine running locally):

Updating a Resource

Example (webmachine running locally):

Updating a Stream

Example (webmachine running locally):

Updating a Data-Point

Updating a Virtual-Stream

Updating a Group

Deleting

Deleting a User

Example (webmachine running locally):

Deleting a Resource

Example (webmachine running locally):

Deleting a Stream

Example (webmachine running locally):

Deleting a Data-Point

Deleting a Virtual-Stream

Deleting a Group

Searching

Searching for Users

Searching for Resources

Parameters:

Example (webmachine running locally):

Searching for Streams

Parameters:

Example (webmachine running locally):

Searching for Data-Points

Parameters:

Searching for Virtual-Streams

Searching for Groups

General Search

Parameters:

Example (webmachine running locally):

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