From 5d4740e52fb7374df503df46f3f5c0489be94292 Mon Sep 17 00:00:00 2001
From: Harald Musum <musum@verizonmedia.com>
Date: Wed, 22 May 2019 10:59:56 +0200
Subject: Do lazy initialization of default linguistics provider

---
 .../yahoo/language/provider/DefaultLinguisticsProvider.java   | 11 +++++++----
 1 file changed, 7 insertions(+), 4 deletions(-)

(limited to 'container-core/src')

diff --git a/container-core/src/main/java/com/yahoo/language/provider/DefaultLinguisticsProvider.java b/container-core/src/main/java/com/yahoo/language/provider/DefaultLinguisticsProvider.java
index 8f08e33a777..d9af9bf88b2 100644
--- a/container-core/src/main/java/com/yahoo/language/provider/DefaultLinguisticsProvider.java
+++ b/container-core/src/main/java/com/yahoo/language/provider/DefaultLinguisticsProvider.java
@@ -1,10 +1,12 @@
 // Copyright 2017 Yahoo Holdings. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
 package com.yahoo.language.provider;
 
+import com.google.common.base.Supplier;
+import com.google.common.base.Suppliers;
 import com.google.inject.Inject;
-import com.yahoo.language.opennlp.OpenNlpLinguistics;
 import com.yahoo.container.di.componentgraph.Provider;
 import com.yahoo.language.Linguistics;
+import com.yahoo.language.opennlp.OpenNlpLinguistics;
 
 /**
  * Provides the default linguistics implementation if no linguistics component has been explicitly configured
@@ -14,14 +16,15 @@ import com.yahoo.language.Linguistics;
  */
 public class DefaultLinguisticsProvider implements Provider<Linguistics> {
 
-    private final Linguistics linguistics;
+    // Use lazy initialization to avoid expensive (memory-wise) instantiation f
+    private volatile Supplier<Linguistics> linguisticsSupplier = Suppliers.memoize(OpenNlpLinguistics::new);
 
     @SuppressWarnings("deprecation")
     @Inject
-    public DefaultLinguisticsProvider() { linguistics = new OpenNlpLinguistics(); }
+    public DefaultLinguisticsProvider() { }
 
     @Override
-    public Linguistics get() { return linguistics; }
+    public Linguistics get() { return linguisticsSupplier.get(); }
 
     @Override
     public void deconstruct() {}
-- 
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