Reduce inits of MetroConfigLoader

Creating a MetroConfigLoader requires frequent class- and resource-loading, so re-use factories when applicable

jaxws-ri/runtime/rt/src/main/java/com/sun/xml/ws/assembler/TubelineAssemblyController.java

@@ -10,8 +10,11 @@
 
 package com.sun.xml.ws.assembler;
 
+import com.google.common.cache.Cache;
+import com.google.common.cache.CacheBuilder;
 import com.sun.istack.NotNull;
 import com.sun.istack.logging.Logger;
+import com.sun.xml.ws.api.server.Container;
 import com.sun.xml.ws.assembler.dev.ClientTubelineAssemblyContext;
 import com.sun.xml.ws.assembler.dev.ServerTubelineAssemblyContext;
 import com.sun.xml.ws.resources.TubelineassemblyMessages;
@@ -23,6 +26,7 @@
 import java.net.URISyntaxException;
 import java.util.Collection;
 import java.util.LinkedList;
+import java.util.concurrent.TimeUnit;
 
 /**
  *
@@ -32,6 +36,11 @@ final class TubelineAssemblyController {
 
     private final MetroConfigName metroConfigName;
 
+    private static final Cache<Container, TubeFactoryList> tubeFactoryListCache = CacheBuilder.newBuilder()
+        .maximumSize(100)
+        .expireAfterWrite(5, TimeUnit.MINUTES)
+        .build();
+
     TubelineAssemblyController(MetroConfigName metroConfigName) {
         this.metroConfigName = metroConfigName;
     }
@@ -59,8 +68,13 @@ Collection<TubeCreator> getTubeCreators(ClientTubelineAssemblyContext context) {
             endpointUri = null;
         }
 
-        MetroConfigLoader configLoader = new MetroConfigLoader(context.getContainer(), metroConfigName);
-        return initializeTubeCreators(configLoader.getClientSideTubeFactories(endpointUri));
+        TubeFactoryList tubeFactoryList = tubeFactoryListCache.getIfPresent(context.getContainer());
+        if (tubeFactoryList == null) {
+            MetroConfigLoader configLoader = new MetroConfigLoader(context.getContainer(), metroConfigName);
+            tubeFactoryList = configLoader.getClientSideTubeFactories(endpointUri);
+            tubeFactoryListCache.put(context.getContainer(), tubeFactoryList);
+        }
+        return initializeTubeCreators(tubeFactoryList);
     }
 
     /**