Hi all:
I am having a jar archive environment which is gonna call my class in a folder like this:
java -jar "emarket.jar" ../tournament 100
My compiled class is deployed into the ../tournament folder, this command runs well.
After I changed my code to load a properties file, it gets the following exception message:
Exception in thread "main" java.security.AccessControlException: access denied (java.io.FilePermission agent.properties read)
at java.security.AccessControlContext.checkPermission(Unknown Source)
at java.security.AccessController.checkPermission(Unknown Source)
at java.lang.SecurityManager.checkPermission(Unknown Source)
at java.lang.SecurityManager.checkRead(Unknown Source)
at java.io.FileInputStream.<init>(Unknown Source)
at java.io.FileInputStream.<init>(Unknown Source)
at Agent10479475.getPropertiesFromConfigFile(Agent10479475.java:110)
at Agent10479475.<init>(Agent10479475.java:100)
at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
at sun.reflect.NativeConstructorAccessorImpl.newInstance(Unknown Source)
at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(Unknown Source)
at java.lang.reflect.Constructor.newInstance(Unknown Source)
at java.lang.Class.newInstance0(Unknown Source)
at java.lang.Class.newInstance(Unknown Source)
at emarket.client.EmarketSandbox.instantiateClientObjects(EmarketSandbox.java:92)
at emarket.client.EmarketSandbox.<init>(EmarketSandbox.java:27)
at emarket.client.EmarketSandbox.main(EmarketSandbox.java:166)
I am wondering why this security checking will fail. I issue the getPropertitiesFromConfigFile() function inside my class's default constructor, like this:
public class Agent10479475 extends AbstractClientAgent
{
//default constructor
public Agent10479475()
{
//set all properties to their default values in constructor
FT_THRESHOLD = 400;
FT_THRESHOLD_MARGIN = 50;
printOut("Now loading properties from a config file...", "");
getPropertiesFromConfigFile();
printOut("Finished loading","");
}
private void getPropertiesFromConfigFile()
{
Properties props = new Properties();
try
{
props.load(new FileInputStream("agent.properties"));
FT_THRESHOLD = Long.parseLong(props.getProperty("FT_THRESHOLD"));
FT_THRESHOLD_MARGIN = Long.parseLong(props.getProperty("FT_THRESHOLD_MARGIN "));
}
catch(java.io.FileNotFoundException fnfex)
{
printOut("CANNOT FIND PROPERTIES FILE :", fnfex);
}
catch(java.io.IOException ioex)
{
printOut("IOEXCEPTION OCCURED :", ioex);
}
}
}
My class is loading its own .properties file under the same folder. why would the Java environment complains about such a denial of access?
Must I config the emarket.client.EmarketSandbox class, which is not written by me and stored inside the emarket.jar, to access my agent.properties file?
Any hints or suggestions is much appreciated. Many thanks in advance.
