lsmyrnaios
/
UrlsController
1
0
Fork 2
Code Issues Pull Requests Releases 18 Wiki Activity
The Controller app of the PDF Aggregation Service.
105 Commits 2 Branches 18 Tags 1.3 MiB
Java 98.3%
Shell 1.6%
Go to file
Lampros Smyrnaios c9f33d3afa Add an extra precaution-check to allow the emptying or deletion of an S3-Object-Store bucket, only when the app runs in "TestEnvironment". 2023-02-01 16:42:22 +02:00
gradle/wrapper - Improve some log-messages. 2022-11-30 16:28:39 +02:00
src/main Add an extra precaution-check to allow the emptying or deletion of an S3-Object-Store bucket, only when the app runs in "TestEnvironment". 2023-02-01 16:42:22 +02:00
.gitignore springified project 2022-01-30 22:15:13 +02:00
Dockerfile - Allow the user to build, push and run the App in Docker, straight though the "installAndRun.sh" script. 2022-02-04 15:49:56 +02:00
README.md Improve documentation. 2023-01-27 14:31:07 +02:00
build.gradle - Heavily reduce the maximum amount of space needed, by deleting the files of each full-texts batch, right after they are uploaded to the S3 Object Store. 2023-01-23 20:23:21 +02:00
gradle.properties - Improve some log-messages. 2022-11-30 16:28:39 +02:00
installAndRun.sh - Change the parquet compression from "Snappy" to "Gzip", as there is an unhandleable exception when the app is running inside a Docker Container and uses the "Snappy" compression. 2022-12-08 16:28:41 +02:00
settings.gradle - Add the "isControllerAlive"-endpoint. 2021-09-23 15:08:52 +03:00

README.md

UrlsController

The Controller's Application receives requests coming from the Workers , constructs an assignments-list with data received from a database and returns the list to the workers.
Then, it receives the "WorkerReports", it requests the full-texts from the workers, in batches, and uploads them on the S3-Object-Store. Finally, it writes the related reports, along with the updated file-locations into the database.
The database used is the Impala.

Statistics API:

  • "getNumberOfPayloads" endpoint: http://IP:PORT/api/stats/getNumberOfPayloads
  • "getNumberOfRecordsInspected" endpoint: http://IP:PORT/api/stats/getNumberOfRecordsInspected

To install and run the application:

  • Run git clone and then cd UrlsController.
  • Set the preferable values inside the application.properties file.
  • Execute the installAndRun.sh script which builds and runs the app.
    If you want to just run the app, then run the script with the argument "1": ./installAndRun.sh 1.
    If you want to build and run the app on a Docker Container, then run the script with the argument "0" followed by the argument "1": ./installAndRun.sh 0 1.

Implementation notes:

  • For transferring the full-text files, we use Facebook's Zstandard compression algorithm, which brings very big benefits in compression rate and speed.
  • The names of the uploaded full-text files ae of the following form: "datasourceID/recordId::fileHash.pdf"