fixed thread run

src/main/java/log4j2.properties

@@ -12,5 +12,5 @@ appender.console.layout.pattern = %d{yyyy-MM-dd HH:mm:ss} %-5p %c{1}:%L - %m%n
 #appender.console.filter.threshold.level = DEBUG
 
 # Root Logger
-rootLogger.level = OFF
+rootLogger.level = DEBUG
 rootLogger.appenderRef.stdout.ref = STDOUT

src/main/java/neqsim/process/equipment/valve/ThrottlingValve.java

@@ -160,7 +160,7 @@ && getOutletPressure() == getOutletStream().getPressure()) {
    * @param percentValveOpening Percentage valve opening (0 to 100).
    * @return Adjusted flow coefficient (Cv) in US gallons per minute (USG/min).
    */
-  private static double adjustCv(double Cv, double percentValveOpening) {
+  private double adjustCv(double Cv, double percentValveOpening) {
     return Cv * (percentValveOpening / 100);
   }
 
@@ -176,7 +176,7 @@ private static double adjustCv(double Cv, double percentValveOpening) {
    * @param percentValveOpening Percentage valve opening (0 to 100).
    * @return Mass flow rate in kilograms per hour (kg/h).
    */
-  public static double liquidValveMassFlow(double P1, double P2, double rho, double Cv, double Fp,
+  public double liquidValveMassFlow(double P1, double P2, double rho, double Cv, double Fp,
       double percentValveOpening) {
     // Equation unit conversion constant
     final double N1 = 0.0865;
@@ -211,8 +211,8 @@ public static double liquidValveMassFlow(double P1, double P2, double rho, doubl
    * @param Fp The piping geometry factor (dimensionless).
    * @return The percent valve opening.
    */
-  public static double calcPercentValveOpeningLiquid(double massFlowRate, double P1, double P2,
-      double rho, double Cv, double Fp) {
+  public double calcPercentValveOpeningLiquid(double massFlowRate, double P1, double P2, double rho,
+      double Cv, double Fp) {
     // Equation unit conversion constant
     final double N1 = 0.0865;
 
@@ -244,7 +244,7 @@ public static double calcPercentValveOpeningLiquid(double massFlowRate, double P
    * @param percentValveOpening Percentage valve opening (0 to 100).
    * @return Downstream pressure in bar.
    */
-  public static double liquidValvePout(double P1, double m, double rho, double Cv, double Fp,
+  public double liquidValvePout(double P1, double m, double rho, double Cv, double Fp,
       double percentValveOpening) {
     // Equation unit conversion constant
     final double N1 = 0.0865;
@@ -281,7 +281,7 @@ public static double liquidValvePout(double P1, double m, double rho, double Cv,
    * @param percentValveOpening Percentage valve opening (0 to 100).
    * @return Flow coefficient (Cv) in US gallons per minute (USG/min).
    */
-  public static double liquidValveCv(double P1, double P2, double rho, double m, double Fp,
+  public double liquidValveCv(double P1, double P2, double rho, double m, double Fp,
       double percentValveOpening) {
     // Equation unit conversion constant
     final double N1 = 0.0865;

src/main/java/neqsim/process/processmodel/ProcessModel.java

@@ -12,41 +12,32 @@
  *
  * Manages a collection of processes that can be run in steps or continuously.
  * 
- * @author Even Solbraa
- * @version $Id: $Id
+ * 
  */
 public class ProcessModel implements Runnable {
+
   static Logger logger = LogManager.getLogger(ProcessModel.class);
   private Map<String, ProcessSystem> processes = new LinkedHashMap<>();
 
   private boolean runStep = false;
   private int maxIterations = 50;
-  private int iterations = 0;
 
   /**
    * Checks if the model is running in step mode.
-   *
-   * @return true if running in step mode, false otherwise.
    */
   public boolean isRunStep() {
     return runStep;
   }
 
   /**
    * Sets the step mode for the process.
-   *
-   * @param runStep true to enable step mode, false to disable.
    */
   public void setRunStep(boolean runStep) {
     this.runStep = runStep;
   }
 
   /**
    * Adds a process to the model.
-   *
-   * @param name the name of the process.
-   * @param process the process to add.
-   * @return true if the process was added successfully.
    */
   public boolean add(String name, ProcessSystem process) {
     if (name == null || name.isEmpty()) {
@@ -65,55 +56,72 @@ public boolean add(String name, ProcessSystem process) {
 
   /**
    * Retrieves a process by its name.
-   *
-   * @param name the name of the process.
-   * @return the corresponding process, or null if not found.
    */
   public ProcessSystem get(String name) {
     return processes.get(name);
   }
 
   /**
    * Removes a process by its name.
-   *
-   * @param name the name of the process to remove.
-   * @return true if the process was removed, false otherwise.
    */
   public boolean remove(String name) {
     return processes.remove(name) != null;
   }
 
   /**
-   * Executes all processes, either continuously or in steps based on mode.
+   * The core run method.
+   * 
+   * - If runStep == true, each process is run in "step" mode exactly once. - Otherwise (continuous
+   * mode), it loops up to maxIterations or until all processes are finished (isFinished() == true).
    */
   @Override
   public void run() {
-    for (ProcessSystem process : processes.values()) {
-      try {
-        if (runStep) {
+    if (runStep) {
+      // Step mode: just run each process once in step mode
+      for (ProcessSystem process : processes.values()) {
+        try {
+          if (Thread.currentThread().isInterrupted()) {
+            logger.debug("Thread was interrupted, exiting run()...");
+            return;
+          }
           process.run_step();
-        } else {
-          process.run();
+        } catch (Exception e) {
+          System.err.println("Error running process step: " + e.getMessage());
+          e.printStackTrace();
         }
-      } catch (Exception e) {
-        System.err.println("Error running process: " + e.getMessage());
-        e.printStackTrace();
       }
-    }
-    if (!runStep) {
-      if (!isFinished() && iterations < maxIterations) {
-        iterations += 1;
-        run();
-      } else {
-        iterations = 0;
+    } else {
+      int iterations = 0;
+      while (!Thread.currentThread().isInterrupted() && !isFinished()
+          && iterations < maxIterations) {
+        for (ProcessSystem process : processes.values()) {
+          if (Thread.currentThread().isInterrupted()) {
+            logger.debug("Thread was interrupted, exiting run()...");
+            return;
+          }
+          try {
+            process.run(); // the process's continuous run
+          } catch (Exception e) {
+            System.err.println("Error running process: " + e.getMessage());
+            e.printStackTrace();
+          }
+        }
+        iterations++;
       }
     }
   }
 
+  /**
+   * Starts this model in a new thread and returns that thread.
+   */
+  public Thread runAsThread() {
+    Thread processThread = new Thread(this);
+    processThread.start();
+    return processThread;
+  }
+
   /**
    * Checks if all processes are finished.
-   *
-   * @return true if all processes are solved, false otherwise.
    */
   public boolean isFinished() {
     for (ProcessSystem process : processes.values()) {
@@ -125,11 +133,15 @@ public boolean isFinished() {
   }
 
   /**
-   * Executes all processes in a single step.
+   * Runs all processes in a single step (used outside of the thread model).
    */
   public void runStep() {
     for (ProcessSystem process : processes.values()) {
       try {
+        if (Thread.currentThread().isInterrupted()) {
+          logger.debug("Thread was interrupted, exiting run()...");
+          return;
+        }
         process.run_step();
       } catch (Exception e) {
         System.err.println("Error in runStep: " + e.getMessage());
@@ -139,20 +151,19 @@ public void runStep() {
   }
 
   /**
-   * Runs the model as a separate thread.
+   * (Optional) Creates separate threads for each process (if you need them).
    */
   public Map<String, Thread> getThreads() {
     Map<String, Thread> threads = new LinkedHashMap<>();
     try {
       for (ProcessSystem process : processes.values()) {
         Thread thread = new Thread(process);
+        thread.setName(process.getName() + " thread");
         threads.put(process.getName(), thread);
       }
-
     } catch (Exception ex) {
       logger.debug(ex.getMessage(), ex);
     }
     return threads;
   }
-
 }

src/main/java/neqsim/process/processmodel/ProcessSystem.java

@@ -425,14 +425,20 @@ public void run(UUID id) {
       iter++;
       isConverged = true;
       for (int i = 0; i < unitOperations.size(); i++) {
+        if (Thread.currentThread().isInterrupted()) {
+          logger.debug("Process simulation was interrupted, exiting run()..." + getName());
+          break;
+        }
         if (!unitOperations.get(i).getClass().getSimpleName().equals("Recycle")) {
           try {
             if (iter == 1 || unitOperations.get(i).needRecalculation()) {
               unitOperations.get(i).run(id);
             }
           } catch (Exception ex) {
             // String error = ex.getMessage();
-            logger.error(ex.getMessage(), ex);
+            logger.error("error running unit uperation " + unitOperations.get(i).getName() + " "
+                + ex.getMessage(), ex);
+            ex.printStackTrace();
           }
         }
         if (unitOperations.get(i).getClass().getSimpleName().equals("Recycle")
@@ -476,7 +482,8 @@ public void run(UUID id) {
        * signalDB[timeStepNumber][3 * i + 3] = ((MeasurementDeviceInterface)
        * measurementDevices.get(i)) .getUnit(); }
        */
-    } while (((!isConverged || (iter < 2 && hasRecycle)) && iter < 100) && !runStep);
+    } while (((!isConverged || (iter < 2 && hasRecycle)) && iter < 100) && !runStep
+        && !Thread.currentThread().isInterrupted());
 
     for (int i = 0; i < unitOperations.size(); i++) {
       unitOperations.get(i).setCalculationIdentifier(id);
@@ -490,7 +497,10 @@ public void run(UUID id) {
   public void run_step(UUID id) {
     for (int i = 0; i < unitOperations.size(); i++) {
       try {
-        // if (unitOperations.get(i).needRecalculation()) {
+        if (Thread.currentThread().isInterrupted()) {
+          logger.debug("Process simulation was interrupted, exiting run()..." + getName());
+          break;
+        }
         unitOperations.get(i).run(id);
         // }
       } catch (Exception ex) {