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package org.openslx.taskmanager;
import java.io.BufferedReader;
import java.io.FileReader;
import java.io.IOException;
import java.util.LinkedHashMap;
import java.util.Map;
import java.util.Map.Entry;
import org.apache.log4j.Logger;
/**
* Holds the environment that tasks running a system command *should*
* use. The environment is read from a config file.
*/
public class Environment
{
private static final Logger log = Logger.getLogger( Environment.class );
private static Map<String, String> env = new LinkedHashMap<>();
public static boolean load( String fileName )
{
try {
FileReader fileReader = new FileReader( fileName );
BufferedReader bufferedReader = new BufferedReader( fileReader );
Map<String, String> env = new LinkedHashMap<>();
String line = null;
while ( ( line = bufferedReader.readLine() ) != null ) {
if ( !line.matches( "^[a-zA-Z0-9_]+=" ) )
continue;
String[] part = line.split( "=", 2 );
env.put( part[0], part[1] );
}
bufferedReader.close();
Environment.env = env;
log.info( "Loaded " + env.size() + " environment lines." );
} catch ( IOException e ) {
log.info( "Could not load environment definition from " + fileName + ". Processes might use the same environment as this thread." );
return false;
}
return true;
}
public static void set( Map<String, String> environment )
{
environment.clear();
environment.putAll( env );
}
public static String[] get()
{
// Get reference to env so it doesn't change while in this function (load() from other thread)
Map<String, String> env = Environment.env;
String ret[] = new String[ env.size() ];
int i = 0;
for ( Entry<String, String> it : env.entrySet() ) {
ret[i++] = it.getKey() + "=" + it.getValue();
}
return ret;
}
}
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