https://github.com/pejpero/passtime-server
Passtime-Server is a Java-based server application that logs and processes client queries regarding elapsed time. The server handles multiple clients concurrently using non-blocking I/O and multiplexing of socket channels. Clients can log in, request elapsed time information for given date ranges, and log out. Configuration is provided via a YAML
https://github.com/pejpero/passtime-server
calculation client-server concurrent-programming elapsed-time java logging nonblocking serversocketchannel socketchannel yaml yaml-configuration
Last synced: 3 months ago
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Passtime-Server is a Java-based server application that logs and processes client queries regarding elapsed time. The server handles multiple clients concurrently using non-blocking I/O and multiplexing of socket channels. Clients can log in, request elapsed time information for given date ranges, and log out. Configuration is provided via a YAML
- Host: GitHub
- URL: https://github.com/pejpero/passtime-server
- Owner: PejperO
- License: mit
- Created: 2023-04-26T22:27:53.000Z (about 2 years ago)
- Default Branch: main
- Last Pushed: 2023-06-13T21:13:44.000Z (almost 2 years ago)
- Last Synced: 2025-01-12T06:27:36.158Z (4 months ago)
- Topics: calculation, client-server, concurrent-programming, elapsed-time, java, logging, nonblocking, serversocketchannel, socketchannel, yaml, yaml-configuration
- Language: Java
- Homepage:
- Size: 9.77 KB
- Stars: 0
- Watchers: 1
- Forks: 0
- Open Issues: 0
-
Metadata Files:
- Readme: README.md
- License: LICENSE
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README
## Passtime-Server
For each client, the server keeps a log of its queries and their results, as well as a general log of all client requests. Logs are stored in the server's internal memory (outside the file system)
The server (server class) provides information about the elapsed time.
Clients (Client class):
- connect to the server
- send requests
### Protocol
| Task | Answer | Example |
| ------------- |:-------------:| ------------- |
| login id | logged in | login Adam |
| date from | description of the passage of time according to the specification | 2021-02-20 2021-04-30 |
| bye | logged out | |
| bye and log transfer | client log content | in the example printout of the Main class |
### Construction of the Server class
constructor: :
**public Server(String host, int port)**
method **public void stratServer()** - runs the server in a separate thread
method **public void stopServer()** - stops the server and the thread it is running on
method **String getServerLog()** - returns general server log
- multiplexing of socket channels
- The server can handle multiple clients in parallel, but client requests are handled in a single thread
### Construction of the Client class
constructor: :
**public Client(String host, int port, String id)**
method **public void connect()** - connects to the server
method **public String send(String req)** - sends a req request and returns the server response
- non-blocking input - output
### Console results
the contents of the PassTimeServerOptions.yaml file
host: localhost
port: 7777
concurMode: true
showSendRes: true
clientsMap:
Asia:
- 2016-03-30T12:00 2020-03-30T:10:15
- 2019-01-10 2020-03-01
- 2020-03-27T10:00 2020-03-28T10:00
- 2016-03-30T12:00 2020-03-30T10:15
Adam:
- 2018-01-01 2020-03-27
- 2019-01-01 2020-02-28
- 2019-01-01 2019-02-29
- 2020-03-28T10:00 2020-03-29T10:00
result
localhost 7777 true true
Asia: [2016-03-30T12:00 2020-03-30T:10:15, 2019-01-10 2020-03-01, 2020-03-27T10:00 2020-03-28T10:00, 2016-03-30T12:00 2020-03-30T10:15]
Adam: [2018-01-01 2020-03-27, 2019-01-01 2020-02-28, 2019-01-01 2019-02-29, 2020-03-28T10:00 2020-03-29T10:00]
Asia
*** java.time.format.DateTimeParseException: Text '2020-03-30T:10:15' could not be parsed, unparsed text found at index 10
Od 10 stycznia 2019 (czwartek) do 1 marca 2020 (niedziela)
- mija: 416.0 dni, tygodni 59.43
- kalendarzowo: 1 rok, 1 miesi�c, 20 dni
Od 27 marca 2020 (pi�tek) godz. 10:00 do 28 marca 2020 (sobota) godz. 10:00
- mija: 1 dzie�, tygodni 0.14
- godzin: 24, minut: 1440
- kalendarzowo: 1 dzie�
Od 30 marca 2016 (�roda) godz. 12:00 do 30 marca 2020 (poniedzia�ek) godz. 10:15
- mija: 1460 dni, tygodni 208.57
- godzin: 35062, minut: 2103735
- kalendarzowo: 4 lata
Adam
Od 1 stycznia 2018 (poniedzia�ek) do 27 marca 2020 (pi�tek)
- mija: 816.0 dni, tygodni 116.57
- kalendarzowo: 2 lata, 2 miesi�ce, 26 dni
Od 1 stycznia 2019 (wtorek) do 28 lutego 2020 (pi�tek)
- mija: 423.0 dni, tygodni 60.43
- kalendarzowo: 1 rok, 1 miesi�c, 27 dni
*** java.time.format.DateTimeParseException: Text '2019-02-29' could not be parsed: Invalid date 'February 29' as '2019' is not a leap year
Od 28 marca 2020 (sobota) godz. 10:00 do 29 marca 2020 (niedziela) godz. 10:00
- mija: 1 dzie�, tygodni 0.14
- godzin: 23, minut: 1380
- kalendarzowo: 1 dzie�
## What I Learned
* serverSocketChannel
* socketChannel
* localDate
* DecimalFormat
* ZonedDateTime
* LinkedHashMap
* yaml files