workcraft/PolicyPlugin/src/org/workcraft/plugins/policy/tasks/DeadlockFreenessTask.java
package org.workcraft.plugins.policy.tasks;
import org.workcraft.Framework;
import org.workcraft.exceptions.NoExporterException;
import org.workcraft.interop.Exporter;
import org.workcraft.plugins.mpsat_verification.presets.VerificationParameters;
import org.workcraft.plugins.mpsat_verification.tasks.MpsatOutput;
import org.workcraft.plugins.mpsat_verification.tasks.MpsatTask;
import org.workcraft.plugins.mpsat_verification.tasks.VerificationChainOutput;
import org.workcraft.plugins.mpsat_verification.utils.ReachUtils;
import org.workcraft.plugins.petri.Petri;
import org.workcraft.plugins.policy.VisualPolicy;
import org.workcraft.plugins.policy.converters.PolicyToPetriConverter;
import org.workcraft.plugins.stg.interop.StgFormat;
import org.workcraft.tasks.*;
import org.workcraft.utils.ExportUtils;
import org.workcraft.utils.FileUtils;
import org.workcraft.utils.WorkspaceUtils;
import org.workcraft.workspace.WorkspaceEntry;
import java.io.File;
public class DeadlockFreenessTask implements Task<VerificationChainOutput> {
private final WorkspaceEntry we;
public DeadlockFreenessTask(WorkspaceEntry we) {
this.we = we;
}
@Override
public Result<? extends VerificationChainOutput> run(ProgressMonitor<? super VerificationChainOutput> monitor) {
TaskManager taskManager = Framework.getInstance().getTaskManager();
String prefix = FileUtils.getTempPrefix(we.getTitle());
File directory = FileUtils.createTempDirectory(prefix);
VerificationParameters verificationParameters = ReachUtils.getDeadlockParameters();
try {
VisualPolicy policy = WorkspaceUtils.getAs(we, VisualPolicy.class);
PolicyToPetriConverter converter = new PolicyToPetriConverter(policy);
Petri model = converter.getPetriNet().getMathModel();
StgFormat format = StgFormat.getInstance();
Exporter exporter = ExportUtils.chooseBestExporter(model, format);
if (exporter == null) {
throw new NoExporterException(model, format);
}
monitor.progressUpdate(0.10);
File netFile = new File(directory, "net" + format.getExtension());
ExportTask exportTask = new ExportTask(exporter, model, netFile);
SubtaskMonitor<Object> mon = new SubtaskMonitor<>(monitor);
Result<? extends ExportOutput> exportResult = taskManager.execute(
exportTask, "Exporting .g", mon);
if (!exportResult.isSuccess()) {
if (exportResult.isCancel()) {
return Result.cancel();
}
return Result.failure(new VerificationChainOutput(
exportResult, null, null, verificationParameters));
}
monitor.progressUpdate(0.20);
MpsatTask mpsatTask = new MpsatTask(netFile, verificationParameters, directory);
Result<? extends MpsatOutput> mpsatResult = taskManager.execute(
mpsatTask, "Running deadlock checking [MPSat]", mon);
if (!mpsatResult.isSuccess()) {
if (mpsatResult.isCancel()) {
return Result.cancel();
}
String errorMessage = mpsatResult.getPayload().getErrorsHeadAndTail();
return Result.failure(new VerificationChainOutput(
exportResult, null, mpsatResult, verificationParameters, errorMessage));
}
monitor.progressUpdate(0.90);
if (mpsatResult.getPayload().hasSolutions()) {
return Result.success(new VerificationChainOutput(
exportResult, null, mpsatResult, verificationParameters, "Policy net has a deadlock"));
}
monitor.progressUpdate(1.0);
return Result.success(new VerificationChainOutput(
exportResult, null, mpsatResult, verificationParameters, "Policy net is deadlock-free"));
} catch (Throwable e) {
return new Result<>(e);
} finally {
FileUtils.deleteOnExitRecursively(directory);
}
}
}