public int g(int a) {
Context cx = Context.enter();
try {
ContinuationPending pending = cx.captureContinuation();
pending.setApplicationState(2 * a);
throw pending;
} finally {
Context.exit();
}
}
public void testScriptWithContinuations() {
Context cx = Context.enter();
try {
cx.setOptimizationLevel(-1); // must use interpreter mode
Script script = cx.compileString("myObject.f(3) + 1;", "test source", 1, null);
cx.executeScriptWithContinuations(script, globalScope);
fail("Should throw ContinuationPending");
} catch (ContinuationPending pending) {
Object applicationState = pending.getApplicationState();
assertEquals(new Integer(3), applicationState);
int saved = (Integer) applicationState;
Object result = cx.resumeContinuation(pending.getContinuation(), globalScope, saved + 1);
assertEquals(5, ((Number) result).intValue());
} finally {
Context.exit();
}
}
public void testFunctionWithContinuations() {
Context cx = Context.enter();
try {
cx.setOptimizationLevel(-1); // must use interpreter mode
cx.evaluateString(
globalScope, "function f(a) { return myObject.f(a); }", "function test source", 1, null);
Function f = (Function) globalScope.get("f", globalScope);
Object[] args = {7};
cx.callFunctionWithContinuations(f, globalScope, args);
fail("Should throw ContinuationPending");
} catch (ContinuationPending pending) {
Object applicationState = pending.getApplicationState();
assertEquals(7, ((Number) applicationState).intValue());
int saved = (Integer) applicationState;
Object result = cx.resumeContinuation(pending.getContinuation(), globalScope, saved + 1);
assertEquals(8, ((Number) result).intValue());
} finally {
Context.exit();
}
}
public void testSerializationWithContinuations() throws IOException, ClassNotFoundException {
Context cx = Context.enter();
try {
cx.setOptimizationLevel(-1); // must use interpreter mode
cx.evaluateString(
globalScope, "function f(a) { return myObject.f(a); }", "function test source", 1, null);
Function f = (Function) globalScope.get("f", globalScope);
Object[] args = {7};
cx.callFunctionWithContinuations(f, globalScope, args);
fail("Should throw ContinuationPending");
} catch (ContinuationPending pending) {
// serialize
ByteArrayOutputStream baos = new ByteArrayOutputStream();
ObjectOutputStream oos = new ObjectOutputStream(baos);
oos.writeObject(globalScope);
oos.writeObject(pending.getContinuation());
oos.close();
baos.close();
byte[] serializedData = baos.toByteArray();
// deserialize
ByteArrayInputStream bais = new ByteArrayInputStream(serializedData);
ObjectInputStream ois = new ObjectInputStream(bais);
globalScope = (Scriptable) ois.readObject();
Object continuation = ois.readObject();
ois.close();
bais.close();
Object result =
cx.resumeContinuation(
continuation, globalScope, 8); // / XXX: 8 shoudl be applicationstate + 1
assertEquals(8, ((Number) result).intValue());
} finally {
Context.exit();
}
}