Solved double spending, added haggling

conf/nodes.xml

@@ -16,10 +16,14 @@
         <money>10</money>
         <channels>MEAT SALE_AND_PURCHASE;VEGETABLE SALE_AND_PURCHASE;FRUIT SALE_AND_PURCHASE</channels>
     </node>
-    <node type = "Distributor">
+    <node type = "Seller">
         <money>1500</money>
         <channels>MEAT SALE_AND_PURCHASE;VEGETABLE SALE_AND_PURCHASE;FRUIT SALE_AND_PURCHASE</channels>
     </node>
+    <node type = "Distributor">
+        <money>1000</money>
+        <channels>MEAT SALE_AND_PURCHASE;VEGETABLE SALE_AND_PURCHASE;FRUIT SALE_AND_PURCHASE</channels>
+    </node>
     <node type = "Customer">
         <money>250</money>
         <channels>MEAT SALE;VEGETABLE SALE;FRUIT SALE</channels>

conf/scenarios.xml

@@ -10,15 +10,16 @@
 generate
 consume
 doaction <product-operation-type>
-doaction <product-operation-type> <product-name>
-sendreq <transaction-type> <product-type> <product-name>
+sell <product-type> <product-name>
+buy <product-type> <produt-name> <product-price>
 pass
 -->
 <scenarios>
     <scenario type="Farmer">
         <steps>
             generate
-            sendreq SALE FRUIT jablko
+            pass
+            sell FRUIT jablko
         </steps>
     </scenario>
 </scenarios>

src/main/java/cz/cvut/fel/sit/omo/foodchain/channel/ChannelBase.java

@@ -1,6 +1,7 @@
 package cz.cvut.fel.sit.omo.foodchain.channel;
 
 import cz.cvut.fel.sit.omo.foodchain.node.base.NodeBase;
+import cz.cvut.fel.sit.omo.foodchain.operation.ProductTransaction;
 import cz.cvut.fel.sit.omo.foodchain.operation.Transaction;
 import cz.cvut.fel.sit.omo.foodchain.product.ProductType;
 import cz.cvut.fel.sit.omo.foodchain.requirement.Requirement;
@@ -81,6 +82,10 @@ public abstract class ChannelBase implements Observable {
     public void addTransaction(Transaction transaction)
     {
         this.transactions.add(transaction);
+        try {
+            ((ProductTransaction) transaction).getProduct().setStateToInTransit();
+        }
+        catch (Exception ignored) {}
     }
 
     public void disposeOf(Requirement requirement) { this.requirements.remove(requirement); }

src/main/java/cz/cvut/fel/sit/omo/foodchain/factory/ScenarioFactory.java

@@ -61,10 +61,10 @@ public class ScenarioFactory
                         }
                         break;
                     case "sell":
-                        scenarioStep = new SendRequirementStep(node, TransactionType.SALE, ProductType.valueOf(parts[1]), parts[2], Double.parseDouble(parts[3]));
+                        scenarioStep = new SendRequirementStep(node, TransactionType.SALE, ProductType.valueOf(parts[1]), parts[2]);
                         break;
                     case "buy":
-                        scenarioStep = new SendRequirementStep(node, TransactionType.PURCHASE, ProductType.valueOf(parts[1]), parts[2]);
+                        scenarioStep = new SendRequirementStep(node, TransactionType.PURCHASE, ProductType.valueOf(parts[1]), parts[2], Double.parseDouble(parts[3]));
                         break;
                     case "pass":
                         scenarioStep = new PassStep();

src/main/java/cz/cvut/fel/sit/omo/foodchain/node/Farmer.java

@@ -5,6 +5,8 @@ import cz.cvut.fel.sit.omo.foodchain.node.enums.NodeType;
 import cz.cvut.fel.sit.omo.foodchain.operation.TransactionType;
 import cz.cvut.fel.sit.omo.foodchain.product.Product;
 
+import javax.naming.InsufficientResourcesException;
+
 public class Farmer extends SellerNodeBase {
 
     public Farmer(double startMoney) {
@@ -15,6 +17,10 @@ public class Farmer extends SellerNodeBase {
 
     public void generateProduct(Product product) {
         storeProduct(product);
+        try {
             createRequirement(TransactionType.SALE, product.getProductType(), product.getName(), product.getPrice());
+        } catch (InsufficientResourcesException e) {
+            System.err.println(e.getMessage());
+        }
     }
 }

src/main/java/cz/cvut/fel/sit/omo/foodchain/node/base/NodeBase.java

@@ -84,6 +84,7 @@ public class NodeBase implements ChannelObserver {
 
     public void receiveTransaction(ProductTransaction transaction) {
         if (validateSignature(transaction)) {
+            transaction.getProduct().setStateToReadyForReception();
             transaction.endTransaction();
             sendTransaction(transaction.getProduct().getPrice(), transaction.getNodeCreator(), transaction);
 
@@ -114,21 +115,33 @@ public class NodeBase implements ChannelObserver {
                 .findAny().ifPresent(channel -> channel.addRequirement(req));
     }
 
-    public void createRequirement(TransactionType tType, ProductType pType, String pName, MonetaryAmount price) {
+    public void createRequirement(TransactionType tType, ProductType pType, String pName, MonetaryAmount price) throws InsufficientResourcesException {
+        if (price == null) {
+            try {
+                price = getProductFromStorage(pName, pType).getPrice();
+            }
+            catch (NullPointerException e) {
+                throw new InsufficientResourcesException("product unavailable");
+            }
+        }
         Requirement req = new Requirement(this, tType, pType, pName, price);
         subscribedChannels.keySet().stream()
                 .filter(ch -> ch.getProductType().equals(pType))
                 .findAny().ifPresent(channel -> channel.addRequirement(req));
     }
 
-    public void acceptRequirement(Requirement req) {
+    public void acceptRequirement(Requirement req) throws InsufficientResourcesException {
         System.out.println(this.getClass().getSimpleName() + " accepted " + req.toString());
         if (req.getTransactionType() == TransactionType.SALE) {
             createRequirement(TransactionType.PURCHASE, req.getProductType(), req.getProductName(), req.getPrice());
         }
         else {
+            if (req.getPrice().isGreaterThanOrEqualTo(getProductFromStorage(req.getProductName(), req.getProductType()).getPrice().multiply(0.9))) {
+                getProductFromStorage(req.getProductName(), req.getProductType()).setPrice(req.getPrice());
                 sendTransaction(getProductFromStorage(req.getProductName(), req.getProductType()), req.getCreator());
             }
+            else createRequirement(TransactionType.SALE, req.getProductType(), req.getProductName(), req.getPrice());
+        }
     }
 
 
@@ -144,7 +157,7 @@ public class NodeBase implements ChannelObserver {
 
 
     public void doAction(ProductOperationType action, Product product) {
-        Action actionProcess = new Action(this, product, action);
+        new Action(this, product, action);
     }
 
 
@@ -217,13 +230,17 @@ public class NodeBase implements ChannelObserver {
     @Override
     public void update(Requirement requirement, ChannelBase channel) {
         if (senderPurchaserCheck(requirement) && transactionSubscriptionCheck(requirement, channel) && requirementCheck(requirement)) {
-            channel.disposeOf(requirement);
+            try {
                 acceptRequirement(requirement);
+                channel.disposeOf(requirement);
+            } catch (InsufficientResourcesException e) {
+                System.err.println(e.getMessage());
+            }
         }
     }
 
     public void tick() {
         receiveTransactions();
-        System.out.println(this.getClass().getSimpleName() + ": " + money.getNumber());
+        //System.out.println(this.getClass().getSimpleName() + ": " + money.getNumber());
     }
 }

src/main/java/cz/cvut/fel/sit/omo/foodchain/operation/Action.java

@@ -17,7 +17,8 @@ public class Action extends OperationBase {
         lastOperation = product.getCurrentOperation();
         duration = type.getDuration();
         product.setCurrentOperation(this);
-        product.setStateToReadyForDispatch();
+        product.setStateToInAction();
+        System.out.println(toString());
     }
 
     private void endAction() {
@@ -45,4 +46,13 @@ public class Action extends OperationBase {
     public ProductOperationType getType() {
         return type;
     }
+
+    @Override
+    public String toString() {
+        return "Action{" +
+                ", product=" + product +
+                ", type=" + type +
+                ", duration=" + duration +
+                '}';
+    }
 }

src/main/java/cz/cvut/fel/sit/omo/foodchain/operation/ProductOperationType.java

@@ -1,13 +1,17 @@
 package cz.cvut.fel.sit.omo.foodchain.operation;
 
+import cz.cvut.fel.sit.omo.foodchain.node.enums.NodeType;
+
 public enum ProductOperationType {
 
-    STORE_MEAT(10, -8);
+    STORE_MEAT(NodeType.All, 10, -8);
 
+    private final NodeType node;
     private final int duration;
     private final int temperature;
 
-    ProductOperationType(int duration, int temperature) {
+    ProductOperationType(NodeType node, int duration, int temperature) {
+        this.node = node;
         this.duration = duration;
         this.temperature = temperature;
     }
@@ -19,4 +23,6 @@ public enum ProductOperationType {
     public int getTemperature() {
         return temperature;
     }
+
+    public NodeType getNode() { return node; }
 }

src/main/java/cz/cvut/fel/sit/omo/foodchain/product/Product.java

@@ -111,6 +111,17 @@ public class Product
             throw new IllegalStateException("Cannot set state READY_FOR_RECEPTION. Product has not been in transit!");
     }
 
+    /**
+     * Set current product state to IN_ACTION. Throws IllegalStateException if the product is not AVAILABLE.
+     */
+    public void setStateToInAction()
+    {
+        if(this.productState.equals(ProductState.AVAILABLE))
+            this.productState = ProductState.IN_ACTION;
+        else
+            throw new IllegalStateException("Cannot set state IN_ACTION. Product is not AVAILABLE!");
+    }
+
     /*
     public void setProductState(ProductState productState)
     {

src/main/java/cz/cvut/fel/sit/omo/foodchain/product/ProductState.java

@@ -2,5 +2,5 @@ package cz.cvut.fel.sit.omo.foodchain.product;
 
 public enum ProductState
 {
-    AVAILABLE, READY_FOR_DISPATCH, IN_TRANSIT, READY_FOR_RECEPTION;
+    AVAILABLE, READY_FOR_DISPATCH, IN_TRANSIT, READY_FOR_RECEPTION, IN_ACTION
 }

src/main/java/cz/cvut/fel/sit/omo/foodchain/requirement/Requirement.java

@@ -17,6 +17,8 @@ public class Requirement {
     private final String productName;
     private final MonetaryAmount price;
     private int TTL;
+    private static int counter;
+    private int id;
 
     public Requirement(NodeBase creator, TransactionType transactionType, ProductType productType, String productName, double price) {
         this.creator = creator;
@@ -24,7 +26,8 @@ public class Requirement {
         this.productType = productType;
         this.productName = productName;
         this.price = Money.of(price, "USD");
-        TTL = 3;
+        this.TTL = 3;
+        this.id = counter++;
         System.out.println(toString());
     }
 
@@ -34,7 +37,8 @@ public class Requirement {
         this.productType = productType;
         this.productName = productName;
         this.price = price;
-        TTL = 3;
+        this.TTL = 3;
+        this.id = counter++;
         System.out.println(toString());
     }
 
@@ -67,7 +71,8 @@ public class Requirement {
     @Override
     public String toString() {
         return "Requirement{" +
-                "creator=" + creator.getClass().getSimpleName() +
+                "id=" + id +
+                ", creator=" + creator.getClass().getSimpleName() +
                 ", transactionType=" + transactionType +
                 ", productName='" + productName + '\'' +
                 ", TTL=" + TTL +

src/main/java/cz/cvut/fel/sit/omo/foodchain/scenario/SendRequirementStep.java

@@ -6,22 +6,25 @@ import cz.cvut.fel.sit.omo.foodchain.product.ProductType;
 import org.javamoney.moneta.Money;
 
 import javax.money.MonetaryAmount;
+import javax.naming.InsufficientResourcesException;
 
 public class SendRequirementStep extends ScenarioStep {
     private final NodeBase node;
     private final TransactionType tType;
     private final ProductType pType;
     private final String pName;
-    private final MonetaryAmount pPrice;
+    private MonetaryAmount pPrice;
 
+    // sell
     public SendRequirementStep(NodeBase node, TransactionType tType, ProductType pType, String pName) {
         this.node = node;
         this.tType = tType;
         this.pType = pType;
         this.pName = pName;
-        this.pPrice = Money.of(0, "USD");
+        this.pPrice = null;
     }
 
+    // buy
     public SendRequirementStep(NodeBase node, TransactionType tType, ProductType pType, String pName, Double price) {
         this.node = node;
         this.tType = tType;
@@ -32,6 +35,10 @@ public class SendRequirementStep extends ScenarioStep {
 
     @Override
     void execute() {
+        try {
             node.createRequirement(tType, pType, pName, pPrice);
+        } catch (InsufficientResourcesException e) {
+            System.err.println(e.getMessage());
+        }
     }
 }

src/main/java/cz/cvut/fel/sit/omo/foodchain/util/Ticker.java

@@ -13,12 +13,12 @@ public class Ticker {
     private static Timer timer;
 
     public static void start() {
-        timer = new Timer(500, actionEvent -> {
+        timer = new Timer(1000, actionEvent -> {
             System.out.println("-----tick-----");
             PoolDatabase db = FoodChain.getFactoryManager().getPoolDatabaseInstance();
             boolean productBool = db.getProductPoolInstance().findAll().stream().filter(Product::tick).count() == 0; // change duration of action
-            boolean scenarioBool = db.getScenarioPoolInstance().findAll().stream().filter(Scenario::tick).count() == 0; // do next step in scenario
             boolean channelBool = db.getChannelPoolInstance().findAll().stream().filter(ChannelBase::tick).count() == 0; // change TTL of requirements
+            boolean scenarioBool = db.getScenarioPoolInstance().findAll().stream().filter(Scenario::tick).count() == 0; // do next step in scenario
             db.getNodePoolInstance().findAll().forEach(n -> n.tick()); // receive transactions
             if (channelBool && productBool && scenarioBool) stop();
         });