B4J Tutorial [server] Run a Server on a VPS

The steps required to run a B4J server on a hosted server (such as a VPS) are:

1. Download Java: https://www.b4x.com/android/forum/t...lest-way-to-distribute-ui-apps.99835/#content

If you are not familiar with Linux then download it to your development computer, unzip it and upload the files with FTP. You do not need to install anything.

2. Upload the compiled jar with any additional files (www folder for example).

3. Start the server with:

nohup path_to_java/bin/java -jar somejar.jar > nohup.out &

The console output will be written to nohup.out.
You need to use nohup as otherwise the server will be killed when you log out.

4. Make sure that the relevant port is open in the firewall settings.

5. If you want to kill the server you can use this command to find the process number:

ps -ef | grep java
kill <process number>

6. Tip: Use tail -f nohup.out
To monitor the server logs.

If you see an error related to the temporary folder then explicitly set it with:

nohup path_to_java/bin/java -Djava.io.tmpdir="temp" -jar somejar.jar > nohup.out &

If there is another http server running on the computer, like Apache or IIS, then you should not copy the B4J server to its public_html / www / or any other publicly accessible folder.

 

[codie01]

Good Day Erel,

I have unzipped the jre to my computer, Ftp ready, which directory do I install these to?

Thanks Phil

 

[Erel]

You don't need to install it. Just unpack it to whichever folder you like.

 

[codie01]

Hi all, Erel

Hope this is the right place. I have setup a VPS - Linux, I have installed Jetty and Java.

When I fire up Jetty all seems well and I can see the Jetty Logo etc when i browse the ip of the server xxx.xxx.xxx.xxx:8080

However when I run the server Jar I get a bundle error shown in red as follows:

---------------- LOG -----------------

2015-12-17 16:26:36.481:INFO::main: Logging initialized @526ms

2015-12-17 16:26:36.573:INFOejs.Server:main: jetty-9.1.z-SNAPSHOT

2015-12-17 16:26:36.596:WARNejh.MimeTypes:main: java.util.MissingResourceException: Can't find bundle for base name org/eclipse/jetty/http/encoding, locale en_US

2015-12-17 16:26:36.628:INFOejsh.ContextHandler:main: Started o.e.j.s.ServletContextHandler@675d3402{/,0.0.0.0:51042}

2015-12-17 16:26:36.646:INFOejs.Server:main: Started @698ms

---------------- LOG -----------------

Thanks in advanced,

Philip

 

[Erel]

Ignore it. This message is always displayed. It is fixed in B4J v4.0.

 

[jinyistudio]

Hi

How to(Or Could I) setting Multi-domain name for every APP when i running two or more B4J-APP in same VPS ?

Eaxmple:
a.com -> 192.168.1.1:8000 (APP1)
b.com -> 192.168.1.1:8001 (APP2)

 

[Erel]

Please start a new thread for this question.

 

[shashkiranr]

Hi all,

I started my rdc server on the vps running centos 6 successfully using the below post by martin

http://www.b4x.com/android/forum/th...ect-to-any-remote-db.31540/page-8#post-217480

I opened the firewall port 51044 and confirmed it using the below code

sudo iptables -I INPUT -p tcp -m tcp --dport 51044 -j ACCEPT

iptables -L -n

When I enter the server ip to access the test handler to check the connection to db, i get 404 not found error. Am i missing something? Kindly let me know

http://serverip/test:51044

Best,
SK

 

[Erel]

Note that you should have started a new thread for this question.

The port goes after the domain:

http://serverip:51044/test

For further discussion please start a new thread.

 

[shashkiranr]

Hi Erel,

I have started a new thread.

https://www.b4x.com/android/forum/threads/running-rdc-on-vps.66925/

Best,
SK

 

[JakeBullet70]

The console output will be written to nohup.out.

Will there be a problem with this log file growing?

 

[Erel]

The log file will be deleted every time that the server is started. In most cases you don't need to worry about it.
For example the online server example that is now running for several months has create a 2mb log file.

If you like to "rotate" it automatically: http://stackoverflow.com/questions/34139561/how-to-limit-size-of-nohup-out-logs

 

[achtrade]

I'm starting the server with this:

nohup /home/user/RDC-Server/jdk1.7.0_79/bin/java /home/user/RDC-Server/jdbc_driver/mysql-connector-java-5.1.22-bin.jar > nohup.out &

and I'm getting this error:

Error: could not find or load main class .home.user.RDC-Server.jdbc_driver.mysql-connector-java-5.1.22-bin.jar

what's wrong ?

thanks.

 

[shashkiranr]

Error: could not find or load main class .home.user.RDC-Server.jdbc_driver.mysql-connector-java-5.1.22-bin.jar

add this line in the main class of B4J

#AdditionalJar: mysql-connector-java-5.1.38-bin

 

[achtrade]

add this line in the main class of B4J

#AdditionalJar: mysql-connector-java-5.1.38-bin

What do you mean ?, I'm not using my app yet, I'm trying to start my server in a Linux Centos VPS

 

[achtrade]

After add the -jar parameter,
nohup /home/user/RDC-Server/jdk1.7.0_79/bin/java -jar /home/user/RDC-Server/jdbc_driver/mysql-connector-java-5.1.22-bin.jar > nohup.out &

now I'm getting this error:

no main manifest attribute, in /home/user/RDC-Server/jdbc_driver/mysql-connector-java-5.1.22-bin.jar

any idea?

 

[Erel]

You need to start your application. mysql-connector-java-5.1.22-bin.jar is a library used by your application. It cannot be started.

 

[achtrade]

You need to start your application. mysql-connector-java-5.1.22-bin.jar is a library used by your application. It cannot be started.

I'm trying to use the new jRDC2, that means that I can't use this if I'm using B4A ?

https://www.b4x.com/android/forum/t...ation-of-rdc-remote-database-connector.61801/

 

[Erel]

Your question has nothing to do with this thread topic.

 

[victormedranop]

hi, I upload de Jar file run with nohup but I get an error in logs file.

it said is looking for :51042/ws/demo HTTP/1.1" 302 0 "-" ws folder, I cant find it. it's just testing the demo apps.

i'm using debian on a vps. Digital ocean. with java


root@dev01:~# java -version
java version "1.8.0_111"
Java(TM) SE Runtime Environment (build 1.8.0_111-b14)
Java HotSpot(TM) 64-Bit Server VM (build 25.111-b14, mixed mode)

in windows works fine.

regards,

Victor