domain model and empty database

shared-kernel-model/src/main/java/pl/com/bottega/factory/demand/forecasting/DailyId.java

@@ -0,0 +1,15 @@
+package pl.com.bottega.factory.demand.forecasting;
+
+import lombok.AllArgsConstructor;
+import lombok.EqualsAndHashCode;
+import lombok.Getter;
+
+import java.time.LocalDate;
+
+@Getter
+@AllArgsConstructor
+@EqualsAndHashCode
+public class DailyId {
+    private final String refNo;
+    private final LocalDate date;
+}

shared-kernel-model/src/main/java/pl/com/bottega/factory/demand/forecasting/Demand.java

@@ -0,0 +1,25 @@
+package pl.com.bottega.factory.demand.forecasting;
+
+import lombok.Value;
+
+@Value
+public class Demand {
+    long level;
+    Schema schema;
+
+    public enum Schema {
+        AtDayStart, Every3hours, TillDayEnd
+    }
+
+    public static Demand nothingDemanded() {
+        return of(0);
+    }
+
+    public static Demand of(long level) {
+        return new Demand(level, Schema.TillDayEnd);
+    }
+
+    public static Demand of(long level, Schema schema) {
+        return new Demand(level, schema);
+    }
+}

shared-kernel-model/src/main/java/pl/com/bottega/factory/demand/forecasting/DemandEvents.java

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+package pl.com.bottega.factory.demand.forecasting;
+
+import lombok.Value;
+import pl.com.bottega.factory.product.management.RefNoId;
+
+import java.util.Collections;
+import java.util.Map;
+
+public interface DemandEvents {
+    void emit(DemandedLevelsChanged event);
+
+    @Value
+    class DemandedLevelsChanged {
+        RefNoId id;
+        Map<DailyId, Change> results;
+
+        public DemandedLevelsChanged(RefNoId id, Map<DailyId, Change> results) {
+            this.id = id;
+            this.results = Collections.unmodifiableMap(results);
+        }
+
+        @Value
+        public static class Change {
+            Demand previous;
+            Demand current;
+        }
+    }
+}

shared-kernel-model/src/main/java/pl/com/bottega/factory/product/management/RefNoId.java

@@ -0,0 +1,12 @@
+package pl.com.bottega.factory.product.management;
+
+import lombok.AllArgsConstructor;
+import lombok.EqualsAndHashCode;
+import lombok.Getter;
+
+@Getter
+@AllArgsConstructor
+@EqualsAndHashCode
+public class RefNoId {
+    private final String refNo;
+}