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Looks like Rhino is not guaranteed after all. Add some checks.

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This commit is contained in:
Kristian S. Stangeland 2013-04-13 14:20:35 +02:00
parent 8a5ebb88e0
commit cd78e311d5
1 changed files with 44 additions and 11 deletions
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55
ProtocolLib/src/main/java/com/comphenix/protocol/CommandFilter.java
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@ -198,6 +198,9 @@ public class CommandFilter extends CommandBase {
*/
public static final String NAME = "filter";
// Default error handler
private FilterFailedHandler defaultFailedHandler;
// Currently registered filters
private List<Filter> filters = new ArrayList<Filter>();
@ -223,6 +226,11 @@ public class CommandFilter extends CommandBase {
try {
// First attempt
initializeEngine();
// Oh for ..
if (!isInitialized()) {
throw new ScriptException("A JavaScript engine could not be found.");
}
} catch (ScriptException e1) {
// It's not a huge deal
printPackageWarning(e1);
@ -234,6 +242,10 @@ public class CommandFilter extends CommandBase {
try {
initializeEngine();
if (!isInitialized()) {
reporter.reportWarning(this, "Could not load Rhino either. Please upgrade your JVM or OS.");
}
} catch (ScriptException e2) {
// And again ..
printPackageWarning(e2);
@ -255,11 +267,35 @@ public class CommandFilter extends CommandBase {
engine = manager.getEngineByName(config.getScriptEngineName());
// Import useful packages
engine.eval("importPackage(org.bukkit);");
engine.eval("importPackage(com.comphenix.protocol.reflect);");
if (engine != null) {
engine.eval("importPackage(org.bukkit);");
engine.eval("importPackage(com.comphenix.protocol.reflect);");
}
}
/**
* Determine if the filter engine has been successfully initialized.
* @return TRUE if it has, FALSE otherwise.
*/
public boolean isInitialized() {
return engine != null;
}
private FilterFailedHandler getDefaultErrorHandler() {
// No need to create a new object every time
if (defaultFailedHandler == null) {
defaultFailedHandler = new FilterFailedHandler() {
@Override
public boolean handle(PacketEvent event, Filter filter, Exception ex) {
reporter.reportMinimal(plugin, "filterEvent(PacketEvent)", ex, event);
reporter.reportWarning(this, "Removing filter " + filter.getName() + " for causing an exception.");
return false;
}
};
}
return defaultFailedHandler;
}
/**
* Determine whether or not to pass the given packet event to the packet listeners.
* <p>
@ -268,14 +304,7 @@ public class CommandFilter extends CommandBase {
* @return TRUE if we should, FALSE otherwise.
*/
public boolean filterEvent(PacketEvent event) {
return filterEvent(event, new FilterFailedHandler() {
@Override
public boolean handle(PacketEvent event, Filter filter, Exception ex) {
reporter.reportMinimal(plugin, "filterEvent(PacketEvent)", ex, event);
reporter.reportWarning(this, "Removing filter " + filter.getName() + " for causing an exception.");
return false;
}
});
return filterEvent(event, getDefaultErrorHandler());
}
/**
@ -313,6 +342,10 @@ public class CommandFilter extends CommandBase {
sender.sendMessage(ChatColor.RED + "Debug mode must be enabled in the configuration first!");
return true;
}
if (!isInitialized()) {
sender.sendMessage(ChatColor.RED + "JavaScript engine was not present. Filter system is disabled.");
return true;
}
final SubCommand command = parseCommand(args, 0);
final String name = args[1];