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Pivotal GemFire 8.1+ installed
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Spring XD 1.1+ installed
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R 3.1+ installed with the following packages
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RCurl
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quantmod
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TTR
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jsonlite
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RSNNS
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Install R:
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Linux
su -c 'rpm -Uvh http://download.fedoraproject.org/pub/epel/6/i386/epel-release-6-8.noarch.rpm' sudo yum update sudo yum install R
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Mac OSX (homebrew)
brew install R
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The R packages can be easily installed by typing at the R command line:
> install.packages(c("RCurl","quantmod","TTR","jsonlite","RSNNS"))
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Execute the
setup.gfsh
script as follows:
gfsh run --file=setup.gfsh 1. Executing - start locator --name=locator1 --J=-Dgemfire.http-service-port=7575 ............................. Locator in FinanceStream/locator1 on 192.168.3.5[10334] as locator1 is currently online. Process ID: 34681 Uptime: 15 seconds ... Successfully connected to: [host=192.168.3.5, port=1099] Cluster configuration service is up and running. 2. Executing - start server --name=server1 --J=-Dgemfire.start-dev-rest-api=true --J=-Dgemfire.http-service-port=8080 .......... Server in FinanceStream/server1 on 192.168.3.5[40404] as server1 is currently online. Process ID: 34683 Uptime: 5 seconds ... 3. Executing - create region --name=/Stocks --type=PARTITION Member | Status ------- | ------------------------------------- server1 | Region "/Stocks" created on "server1" 4. Executing - import data --file=../Stocks.gfd --region=/Stocks --member=server1 Data imported from file : FinanceStream/Stocks.gfd on host : 192.168.3.5 to region : /Stocks 5. Executing - describe --region=/Stocks Name : Stocks Data Policy : partition Hosting Members : server1 Non-Default Attributes Shared By Hosting Members Type | Name | Value ------ | ---- | ----- Region | size | 2601
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Test the server REST endpoint
In a web browser, access http://localhost:8080/gemfire-api/v1
{ "regions" : [ { "name" : "Stocks", "type" : "REPLICATE", "key-constraint" : null, "value-constraint" : null } ] }
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Start with the base stream
xd:> script --file stream-base.xd stream create process_sink --definition "queue:stocks > transform --script='file:transform.groovy' | gemfire-json-server --useLocator=true --host=localhost --port=10334 --regionName=Stocks --keyExpression=payload.getField('entryTimestamp')" --deploy Created and deployed new stream 'process_sink' stream create http_source --definition "http --port=9000 | splitter --expression=#jsonPath(payload,'$') > queue:stocks" --deploy Created and deployed new stream 'http_source'
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If you want to show online quotes (need to be in market hours):
xd:> script --file stream-online-quotes.xd stream create yahoo_finance_source --definition "trigger --fixedDelay=1 | http-client --url='''https://query.yahooapis.com/v1/public/yql?q=select * from yahoo.finance.quote where symbol in (\"TSLA\")&format=json&env=store://datatables.org/alltableswithkeys''' --httpMethod=GET | splitter --expression=#jsonPath(payload,'$.query.results.quote') > queue:stocks" --deploy Created and deployed new stream 'yahoo_finance_source'
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If you want to show predictions:
xd:> script --file stream-predictions.xd stream create r_process --definition "tap:stream:process_sink.transform > object-to-json | shell --command='Rscript nn_evaluate_jordan_ema.R' | splitter --expression=#jsonPath(payload,'$') | gemfire-json-server --useLocator=true --host=localhost --port=10334 --regionName=Predictions --keyExpression=payload.getField('entryTimestamp') " --deploy Created and deployed new stream 'r_process' stream create trainstream --definition "trigger --fixedDelay=10 | shell --command='Rscript nn_train_jordan_ema.R' | log " --deploy Created and deployed new stream 'trainstream'
The simulator replays random 1000 quotes previously stored on GemFire / Geode
$ cd FinanceStreamSimulator $ ./gradlew run
The UI for the application uses JavaFX and acting as GemFire client can subscribe to event notifications on the regions and receive updates as soon as data is updated on the servers, leveraging a PUSH instead of PULL strategy, which is much more efficient.
Under JavaFXChart directory you can build/execute the client:
$ cd JavaFXChart $ ./gradlew run