From 8f99af83cee60676d80cf2334177ab94f82b7959 Mon Sep 17 00:00:00 2001
From: jsimomaa <jani.simomaa@gmail.com>
Date: Fri, 6 Mar 2020 13:47:01 +0200
Subject: [PATCH] Prime SCL BindingRegistry to shave ~0.5s from startup

gitlab #491

Change-Id: Ibbb04dce327697b81fdce894e10569af6b62c309
---
 .../scl/reflection/internal/Activator.java     | 18 ++++++++++++++++++
 .../internal/registry/BindingRegistry.java     |  6 ++++++
 .../internal/registry/Namespace.java           |  2 +-
 3 files changed, 25 insertions(+), 1 deletion(-)

diff --git a/bundles/org.simantics.scl.reflection/src/org/simantics/scl/reflection/internal/Activator.java b/bundles/org.simantics.scl.reflection/src/org/simantics/scl/reflection/internal/Activator.java
index 4e1d01816..a14be4896 100644
--- a/bundles/org.simantics.scl.reflection/src/org/simantics/scl/reflection/internal/Activator.java
+++ b/bundles/org.simantics.scl.reflection/src/org/simantics/scl/reflection/internal/Activator.java
@@ -1,11 +1,14 @@
 package org.simantics.scl.reflection.internal;
 
+import java.util.concurrent.ForkJoinPool;
+
 import org.eclipse.core.runtime.ILog;
 import org.eclipse.core.runtime.Platform;
 import org.eclipse.core.runtime.Status;
 import org.osgi.framework.Bundle;
 import org.osgi.framework.BundleActivator;
 import org.osgi.framework.BundleContext;
+import org.simantics.scl.reflection.internal.registry.BindingRegistry;
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
 
@@ -20,6 +23,21 @@ public class Activator implements BundleActivator {
     public void start(BundleContext context) throws Exception {
         this.context = context;
         instance = this;
+        
+        primeBindingRegistry();
+    }
+
+    private static void primeBindingRegistry() {
+        LOGGER.info("Priming BindingRegistry");
+        ForkJoinPool.commonPool().submit(() -> {
+            try {
+                // this forces static initialzation of the registry in advance
+                BindingRegistry.primeBindingRegistry();
+            } catch (Exception e) {
+                LOGGER.error("Could not prime binding registry", e);
+            }
+            LOGGER.info("Priming done");
+        });
     }
 
     @Override
diff --git a/bundles/org.simantics.scl.reflection/src/org/simantics/scl/reflection/internal/registry/BindingRegistry.java b/bundles/org.simantics.scl.reflection/src/org/simantics/scl/reflection/internal/registry/BindingRegistry.java
index f9bf3fadc..648e314d9 100644
--- a/bundles/org.simantics.scl.reflection/src/org/simantics/scl/reflection/internal/registry/BindingRegistry.java
+++ b/bundles/org.simantics.scl.reflection/src/org/simantics/scl/reflection/internal/registry/BindingRegistry.java
@@ -49,6 +49,12 @@ public class BindingRegistry {
         }
     }
     
+    public static void primeBindingRegistry() {
+        for (Namespace ns : namespaces.values()) {
+            ns.initializeValues();
+        }
+    }
+    
     static {
         initialize();
         if (DEBUG_INIT) {
diff --git a/bundles/org.simantics.scl.reflection/src/org/simantics/scl/reflection/internal/registry/Namespace.java b/bundles/org.simantics.scl.reflection/src/org/simantics/scl/reflection/internal/registry/Namespace.java
index daaa204db..5234d3bfc 100644
--- a/bundles/org.simantics.scl.reflection/src/org/simantics/scl/reflection/internal/registry/Namespace.java
+++ b/bundles/org.simantics.scl.reflection/src/org/simantics/scl/reflection/internal/registry/Namespace.java
@@ -275,7 +275,7 @@ public class Namespace {
         }
     }        
         
-    private synchronized void initializeValues() {
+    synchronized void initializeValues() {
         if(values == null) {
             initializeTypes();
             TypeBindingScheme scheme = MinimalTypeBindingScheme.INSTANCE;
-- 
2.43.2