Examples with BProgram il.ac.bgu.cs.bp.bpjs.model.BProgram used on opensource projects

Example 36 with BProgram

use of il.ac.bgu.cs.bp.bpjs.model.BProgram in project BPjs by bThink-BGU.

the class BProgramRunner method run.

@Override
public void run() {
    try {
        // setup bprogram and runtime parts.
        execSvc = ExecutorServiceMaker.makeWithName("BProgramRunner-" + instanceNum);
        failedAssertion = null;
        listeners.forEach(l -> l.starting(bprog));
        BProgramSyncSnapshot cur = bprog.setup();
        cur.getBThreadSnapshots().forEach(sn -> listeners.forEach(l -> l.bthreadAdded(bprog, sn)));
        // start it
        listeners.forEach(l -> l.started(bprog));
        cur = cur.start(execSvc);
        boolean go = true;
        if (!cur.isStateValid()) {
            failedAssertion = cur.getFailedAssertion();
            listeners.forEach(l -> l.assertionFailed(bprog, failedAssertion));
            go = false;
        }
        // while snapshot not empty, select an event and get the next snapshot.
        while ((!cur.noBThreadsLeft()) && go) {
            // see which events are selectable
            Set<BEvent> possibleEvents = bprog.getEventSelectionStrategy().selectableEvents(cur.getStatements(), cur.getExternalEvents());
            if (possibleEvents.isEmpty()) {
                // No events available or selection. Terminate or wait for external one (in daemon mode).
                if (bprog.isDaemonMode()) {
                    listeners.forEach(l -> l.superstepDone(bprog));
                    // and now we wait.
                    BEvent next = bprog.takeExternalEvent();
                    if (next == null) {
                        // program is not a daemon anymore.
                        go = false;
                    } else {
                        cur.getExternalEvents().add(next);
                    }
                } else {
                    // Ending the program - no selectable event.
                    listeners.forEach(l -> l.superstepDone(bprog));
                    go = false;
                }
            } else {
                // we can select some events - select one and advance.
                Optional<EventSelectionResult> res = bprog.getEventSelectionStrategy().select(cur.getStatements(), cur.getExternalEvents(), possibleEvents);
                if (res.isPresent()) {
                    EventSelectionResult esr = res.get();
                    if (!esr.getIndicesToRemove().isEmpty()) {
                        // the event selection affcted the external event queue.
                        List<BEvent> updatedExternals = new ArrayList<>(cur.getExternalEvents());
                        esr.getIndicesToRemove().stream().sorted(reverseOrder()).forEach(idxObj -> updatedExternals.remove(idxObj.intValue()));
                        cur = cur.copyWith(updatedExternals);
                    }
                    listeners.forEach(l -> l.eventSelected(bprog, esr.getEvent()));
                    cur = cur.triggerEvent(esr.getEvent(), execSvc, listeners);
                    if (!cur.isStateValid()) {
                        failedAssertion = cur.getFailedAssertion();
                        listeners.forEach(l -> l.assertionFailed(bprog, failedAssertion));
                        go = false;
                    }
                } else {
                    // edge case: we can select events, but we didn't. Might be a bug in the EventSelectionStrategy.
                    go = false;
                }
            }
        }
        listeners.forEach(l -> l.ended(bprog));
    } catch (InterruptedException itr) {
        System.err.println("BProgramRunner interrupted: " + itr.getMessage());
    } finally {
        execSvc.shutdown();
    }
}