flatten modules to repo root, vendor deps, repair Eclipse build paths

Move api, engine, ui-console and ui-desktop out of modules/ up to the
repo root and drop the empty exception project (GuessMarketException now
lives in api).

Vendor gson, jaxb, okhttp, openjfx and tomcat under lib/, and group the
JUnit standalone jar into lib/junit/ alongside them.

Rewrite every .classpath: drop the copy-pasted optional="true" that was
masking real build path errors, point the library entries at ../lib/,
and put the JUnit jar on the test source folders so the placeholder
AppTest classes compile.

ui-desktop: take the JavaFX jars off the modulepath (there is no
module-info.java, so module="true" left the packages unresolvable) and
add a Launcher that calls Application.launch, avoiding the "JavaFX
runtime components are missing" check without VM arguments.

engine: add LocalGuessMarketService and the GuessMarketContext provider
interface, and give GuessMarketException the no-arg and cause
constructors they need.

9 files changed, 189 insertions, 0 deletions

diff --git a/engine/.classpath b/engine/.classpath
new file mode 100644
index 0000000..df0a2ce
--- /dev/null
+++ b/engine/.classpath
@@ -0,0 +1,18 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<classpath>
+  <classpathentry kind="src" output="bin/classes" path="src/main/java"/> 
+  <classpathentry kind="src" output="bin/test-classes" path="src/test/java">
+    <attributes>
+      <attribute name="test" value="true"/>
+    </attributes> 
+  </classpathentry>
+  <classpathentry kind="src" path="/guess-market-api">
+    <attributes>
+      <attribute name="module" value="true"/>
+    </attributes>
+  </classpathentry>
+  <classpathentry kind="con" path="org.eclipse.jdt.launching.JRE_CONTAINER"/>
+  <classpathentry kind="lib" path="../lib/junit/junit-platform-console-standalone-6.1.1.jar"/>
+  <classpathentry kind="output" path="bin"/>
+</classpath>
+
diff --git a/engine/.project b/engine/.project
new file mode 100644
index 0000000..943db42
--- /dev/null
+++ b/engine/.project
@@ -0,0 +1,28 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<projectDescription>
+        <name>gauss-market-engine</name>
+        <comment></comment>
+  <projects>
+    <project>gauss-market-api</project>
+        </projects>
+        <buildSpec>
+                <buildCommand>
+                        <name>org.eclipse.jdt.core.javabuilder</name>
+                        <arguments></arguments>
+                </buildCommand>
+        </buildSpec>
+        <natures>
+                <nature>org.eclipse.jdt.core.javanature</nature>
+        </natures>
+        <filteredResources>
+                <filter>
+                        <id>1784965956299</id>
+                        <name></name>
+                        <type>30</type>
+                        <matcher>
+                                <id>org.eclipse.core.resources.regexFilterMatcher</id>
+                                <arguments>node_modules|\.git|__CREATED_BY_JAVA_LANGUAGE_SERVER__</arguments>
+                        </matcher>
+                </filter>
+        </filteredResources>
+</projectDescription>
diff --git a/engine/src/main/java/market/guess/engine/GuessMarketEngine.java b/engine/src/main/java/market/guess/engine/GuessMarketEngine.java
new file mode 100644
index 0000000..aab3cf4
--- /dev/null
+++ b/engine/src/main/java/market/guess/engine/GuessMarketEngine.java
@@ -0,0 +1,7 @@
+package market.guess.engine;
+
+import market.guess.api.LoadResultDTO;
+
+public interface GuessMarketEngine {
+  LoadResultDTO loadEvents();
+}
diff --git a/engine/src/main/java/market/guess/engine/LocalGuessMarketService.java b/engine/src/main/java/market/guess/engine/LocalGuessMarketService.java
new file mode 100644
index 0000000..5a16750
--- /dev/null
+++ b/engine/src/main/java/market/guess/engine/LocalGuessMarketService.java
@@ -0,0 +1,18 @@
+package market.guess.engine;
+
+import market.guess.api.LoadResultDTO;
+import market.guess.engine.provider.GuessMarketContext;
+
+public class LocalGuessMarketService implements GuessMarketEngine {
+  private final GuessMarketContext context;
+
+  public LocalGuessMarketService(GuessMarketContext context) {
+    super();
+    this.context = context;
+  }
+
+  @Override
+  public LoadResultDTO loadEvents() {
+    return context.LoadAsync();
+  }
+}
diff --git a/engine/src/main/java/market/guess/engine/TradingMechanism.java b/engine/src/main/java/market/guess/engine/TradingMechanism.java
new file mode 100644
index 0000000..2f97a2f
--- /dev/null
+++ b/engine/src/main/java/market/guess/engine/TradingMechanism.java
@@ -0,0 +1,15 @@
+package market.guess.engine;
+
+import java.math.BigDecimal;
+
+public interface TradingMechanism {
+  BigDecimal initialCost();
+
+  void onOpen();
+
+  void submit();
+
+  void marketState();
+
+  void settle();
+}
diff --git a/engine/src/main/java/market/guess/engine/mechanism/LmsrTradingMechanism.java b/engine/src/main/java/market/guess/engine/mechanism/LmsrTradingMechanism.java
new file mode 100644
index 0000000..99a26ab
--- /dev/null
+++ b/engine/src/main/java/market/guess/engine/mechanism/LmsrTradingMechanism.java
@@ -0,0 +1,37 @@
+package market.guess.engine.mechanism;
+
+import java.math.BigDecimal;
+import market.guess.engine.TradingMechanism;
+
+public class LmsrTradingMechanism implements TradingMechanism {
+
+  @Override
+  public BigDecimal initialCost() {
+    // TODO Auto-generated method stub
+    throw new UnsupportedOperationException("Unimplemented method 'initialCost'");
+  }
+
+  @Override
+  public void onOpen() {
+    // TODO Auto-generated method stub
+    throw new UnsupportedOperationException("Unimplemented method 'onOpen'");
+  }
+
+  @Override
+  public void submit() {
+    // TODO Auto-generated method stub
+    throw new UnsupportedOperationException("Unimplemented method 'submit'");
+  }
+
+  @Override
+  public void marketState() {
+    // TODO Auto-generated method stub
+    throw new UnsupportedOperationException("Unimplemented method 'marketState'");
+  }
+
+  @Override
+  public void settle() {
+    // TODO Auto-generated method stub
+    throw new UnsupportedOperationException("Unimplemented method 'settle'");
+  }
+}
diff --git a/engine/src/main/java/market/guess/engine/mechanism/OrderBookMechanism.java b/engine/src/main/java/market/guess/engine/mechanism/OrderBookMechanism.java
new file mode 100644
index 0000000..be675ba
--- /dev/null
+++ b/engine/src/main/java/market/guess/engine/mechanism/OrderBookMechanism.java
@@ -0,0 +1,37 @@
+package market.guess.engine.mechanism;
+
+import java.math.BigDecimal;
+import market.guess.engine.TradingMechanism;
+
+public class OrderBookMechanism implements TradingMechanism {
+
+  @Override
+  public BigDecimal initialCost() {
+    // TODO Auto-generated method stub
+    throw new UnsupportedOperationException("Unimplemented method 'initialCost'");
+  }
+
+  @Override
+  public void onOpen() {
+    // TODO Auto-generated method stub
+    throw new UnsupportedOperationException("Unimplemented method 'onOpen'");
+  }
+
+  @Override
+  public void submit() {
+    // TODO Auto-generated method stub
+    throw new UnsupportedOperationException("Unimplemented method 'submit'");
+  }
+
+  @Override
+  public void marketState() {
+    // TODO Auto-generated method stub
+    throw new UnsupportedOperationException("Unimplemented method 'marketState'");
+  }
+
+  @Override
+  public void settle() {
+    // TODO Auto-generated method stub
+    throw new UnsupportedOperationException("Unimplemented method 'settle'");
+  }
+}
diff --git a/engine/src/main/java/market/guess/engine/provider/GuessMarketContext.java b/engine/src/main/java/market/guess/engine/provider/GuessMarketContext.java
new file mode 100644
index 0000000..2306c93
--- /dev/null
+++ b/engine/src/main/java/market/guess/engine/provider/GuessMarketContext.java
@@ -0,0 +1,17 @@
+package market.guess.engine.provider;
+
+import market.guess.api.LoadResultDTO;
+
+public interface GuessMarketContext {
+  LoadResultDTO LoadAsync();
+
+  void SaveChangesAsync();
+
+  void GetAllEventsAsync();
+
+  void GetEventInfoByIdAsync();
+
+  void CreateEventAsync();
+
+  void UpdateEventAsync();
+}
diff --git a/engine/src/test/java/market/guess/engine/AppTest.java b/engine/src/test/java/market/guess/engine/AppTest.java
new file mode 100644
index 0000000..0638bc1
--- /dev/null
+++ b/engine/src/test/java/market/guess/engine/AppTest.java
@@ -0,0 +1,12 @@
+package market.guess.engine;
+
+import static org.junit.jupiter.api.Assertions.assertTrue;
+
+import org.junit.jupiter.api.Test;
+
+public class AppTest {
+  @Test
+  void deterministicTest() {
+    assertTrue(true);
+  }
+}