image uploading - Configure a constant in Tomcat -



image uploading - Configure a constant in Tomcat -

i want provide upload functionality in website. cannot save uploaded image within war. can save particular location on machine , refer there. problem have create code compatible windows machine, mac , openshift server. path images folder different on different machines.

the workaround thinking somehow configure images folder location in tomcat server on different machines , read there. there way configure variable within tomcat? there improve solution problem?

option 1

you can define environment variable in context configuration file.

<context> <environment name="myapp.upload.dir" type="java.lang.string" value="/srv/app/upload" override="true" /> </context>

you can either create new context file application or set environment entry in $tomcat_home/conf/context.xml in case property accessible applications running in tomcat instance. here tomcat documentation contexts.

to access variable value utilize next code:

initialcontext ctx = new initialcontext(); string uploaddir = (string) ctx.lookup("java:comp/env/myapp.upload.dir");

option 2

you specify jvm property in $tomcat_home/bin/setenv.sh (or $tomcat_home\bin\setenv.bat on windows) , retrieve so:

system.getproperty("myapp.upload.dir");

personally think first solution cleaner.

also final note, not think of solution workaround. acceptable solution specify things upload directory in sort of configuration file rather have 1 fixed location works platform can't changed (for illustration $home/app/upload).

tomcat image-uploading

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