Provide io.deephaven.appmode.ApplicationState.Factory via a Set (#3037)

This allows integrators to Bind their own factories if service loader is not appropriate (for example, if the factory has other dependencies).

server/src/main/java/io/deephaven/server/appmode/AppModeModule.java

@@ -5,12 +5,18 @@
 
 import dagger.Binds;
 import dagger.Module;
+import dagger.Provides;
+import dagger.multibindings.ElementsIntoSet;
 import dagger.multibindings.IntoSet;
 import io.deephaven.appmode.ApplicationState;
+import io.deephaven.appmode.ApplicationState.Factory;
 import io.deephaven.engine.util.ScriptSession;
 import io.deephaven.server.session.TicketResolver;
 import io.grpc.BindableService;
 
+import java.util.LinkedHashSet;
+import java.util.Set;
+
 @Module
 public interface AppModeModule {
     @Binds
@@ -29,4 +35,12 @@ public interface AppModeModule {
 
     @Binds
     ApplicationStates bindApplicationStates(ApplicationTicketResolver resolver);
+
+    @Provides
+    @ElementsIntoSet
+    static Set<Factory> providesFactoriesFromServiceLoader() {
+        final Set<Factory> set = new LinkedHashSet<>();
+        ApplicationState.Factory.loadFromServiceFactory().forEach(set::add);
+        return set;
+    }
 }

server/src/main/java/io/deephaven/server/appmode/ApplicationInjector.java

@@ -5,6 +5,7 @@
 
 import io.deephaven.appmode.ApplicationConfig;
 import io.deephaven.appmode.ApplicationState;
+import io.deephaven.appmode.ApplicationState.Factory;
 import io.deephaven.engine.liveness.LivenessScopeStack;
 import io.deephaven.engine.util.ScriptSession;
 import io.deephaven.internal.log.LoggerFactory;
@@ -19,6 +20,7 @@
 import java.util.Collections;
 import java.util.List;
 import java.util.Objects;
+import java.util.Set;
 
 public class ApplicationInjector {
 
@@ -27,19 +29,22 @@ public class ApplicationInjector {
     private final Provider<ScriptSession> scriptSessionProvider;
     private final ApplicationTicketResolver ticketResolver;
     private final ApplicationState.Listener applicationListener;
+    private final Set<Factory> factories;
 
     @Inject
     public ApplicationInjector(
             final Provider<ScriptSession> scriptSessionProvider,
             final ApplicationTicketResolver ticketResolver,
-            final ApplicationState.Listener applicationListener) {
+            final ApplicationState.Listener applicationListener,
+            final Set<Factory> factories) {
         this.scriptSessionProvider = Objects.requireNonNull(scriptSessionProvider);
         this.ticketResolver = ticketResolver;
         this.applicationListener = applicationListener;
+        this.factories = factories;
     }
 
     public void run() throws IOException, ClassNotFoundException {
-        for (ApplicationState.Factory factory : ApplicationState.Factory.loadFromServiceFactory()) {
+        for (ApplicationState.Factory factory : factories) {
             loadApplicationFactory(factory);
         }