X-Git-Url: https://mograsim.net/gitweb/?a=blobdiff_plain;f=plugins%2Fnet.mograsim.machine%2Fsrc%2Fnet%2Fmograsim%2Fmachine%2FMachineRegistry.java;h=089cf31c9fb9f69671211e0204a8a0afccbd23e9;hb=3278dbc72d3d3c803dc5ad2c0dfedc42b277a3d6;hp=52e5d60dc682a0c18b924f021f6fbb90e7b3c3c8;hpb=e4320ff6606b0e8bc5184b8b1ae1e7cae95a5726;p=Mograsim.git

diff --git a/plugins/net.mograsim.machine/src/net/mograsim/machine/MachineRegistry.java b/plugins/net.mograsim.machine/src/net/mograsim/machine/MachineRegistry.java
index 52e5d60d..089cf31c 100644
--- a/plugins/net.mograsim.machine/src/net/mograsim/machine/MachineRegistry.java
+++ b/plugins/net.mograsim.machine/src/net/mograsim/machine/MachineRegistry.java
@@ -3,7 +3,11 @@ package net.mograsim.machine;
 import java.util.Arrays;
 import java.util.Collections;
 import java.util.HashMap;
+import java.util.HashSet;
 import java.util.Map;
+import java.util.Objects;
+import java.util.Set;
+
 import org.eclipse.core.runtime.CoreException;
 import org.eclipse.core.runtime.IConfigurationElement;
 import org.eclipse.core.runtime.IExtension;
@@ -12,11 +16,21 @@ import org.eclipse.core.runtime.IExtensionRegistry;
 import org.eclipse.core.runtime.IRegistryEventListener;
 import org.eclipse.core.runtime.Platform;
 
+/**
+ * The MachineRegsitry is a static context registry for all {@link MachineDefinition}s known at any point during runtime.
+ * <p>
+ * It is updated automatically as mograsim machine definition extension points ({@link #MACHINE_EXT_ID}) are added or removed.
+ *
+ * @author Christian Femers
+ *
+ */
 public class MachineRegistry
 {
-	private static final String MACHINE_EXT_ID = "net.mograsim.machine.machine_definition";
 
-	private static final Map<String, MachineDefinition> installedMachines = new HashMap<>();
+	public static final String MACHINE_EXT_ID = "net.mograsim.machine.machine_definition";
+
+	private static final Map<String, MachineDefinition> installedMachines = Collections.synchronizedMap(new HashMap<>());
+	private static final Set<MachineRegistryListener> listeners = Collections.synchronizedSet(new HashSet<>());
 
 	private static void reload()
 	{
@@ -50,6 +64,7 @@ public class MachineRegistry
 		{
 			System.out.println(ex.getMessage());
 		}
+		notifyListeners();
 	}
 
 	public static void initialize()
@@ -93,4 +108,26 @@ public class MachineRegistry
 	{
 		return installedMachines.get(id);
 	}
+
+	private static void notifyListeners()
+	{
+		Map<String, MachineDefinition> unmodMachines = getInstalledMachines();
+		listeners.forEach(l -> l.onReload(unmodMachines));
+	}
+
+	public static void addMachineRegistryListener(MachineRegistryListener listener)
+	{
+		listeners.add(listener);
+	}
+
+	public static void removeMachineRegistryListener(MachineRegistryListener listener)
+	{
+		listeners.remove(listener);
+	}
+
+	@FunctionalInterface
+	public interface MachineRegistryListener
+	{
+		void onReload(Map<String, MachineDefinition> installedMachines);
+	}
 }