Unexpected - Transient memory is bound to threadlocal, thus shared by two simulator instances

[martinpaljak]

The way transient memory is handled, is not as expected.

Making two simulator instances and sending commands to each other, right now the state is shared, as transient memory seems to come from a threadlocal for some reason.

jcardsim/src/main/java/com/licel/jcardsim/base/SimulatorSystem.java

Line 47 in b54b18b

private static final ThreadLocal<SimulatorRuntime> currentRuntime = new ThreadLocal<SimulatorRuntime>();

The result is that apple A gets the same state as applet B for transient arrays:

jcardsim/src/main/java/com/licel/jcardsim/framework/JCSystemProxy.java

Line 101 in b54b18b

return SimulatorSystem.instance().getTransientMemory().makeByteArray(length, event);

because the instance() is coming from threadlocal:

jcardsim/src/main/java/com/licel/jcardsim/base/SimulatorSystem.java

Lines 77 to 78 in 3c913e4

	public static SimulatorRuntime instance() {
	SimulatorRuntime simulatorRuntime = currentRuntime.get();

What to do (other than have multiple threads), I'd say this is a bug, threading would mean concurrency, but I access to instances sequentially.