CLOUDSTACK-8901: PrepareTemplate job thread hard-coded to max 8 threads

Author: SudharmaJain

engine/components-api/src/com/cloud/template/TemplateManager.java

@@ -38,9 +38,16 @@
  */
 public interface TemplateManager {
     static final String AllowPublicUserTemplatesCK = "allow.public.user.templates";
+    static final String TemplatePreloaderPoolSizeCK = "template.preloader.pool.size";
+
     static final ConfigKey<Boolean> AllowPublicUserTemplates = new ConfigKey<Boolean>("Advanced", Boolean.class, AllowPublicUserTemplatesCK, "true",
         "If false, users will not be able to create public templates.", true, ConfigKey.Scope.Account);
 
+    static final ConfigKey<Integer> TemplatePreloaderPoolSize = new ConfigKey<Integer>("Advanced", Integer.class, TemplatePreloaderPoolSizeCK, "8",
+            "Size of the TemplateManager threadpool", false, ConfigKey.Scope.Global);
+
+
+
     /**
      * Prepares a template for vm creation for a certain storage pool.
      *

server/src/com/cloud/template/TemplateManagerImpl.java

@@ -926,7 +926,7 @@ public boolean configure(String name, Map<String, Object> params) throws Configu
         String disableExtraction = _configDao.getValue(Config.DisableExtraction.toString());
         _disableExtraction = (disableExtraction == null) ? false : Boolean.parseBoolean(disableExtraction);
 
-        _preloadExecutor = Executors.newFixedThreadPool(8, new NamedThreadFactory("Template-Preloader"));
+        _preloadExecutor = Executors.newFixedThreadPool(TemplatePreloaderPoolSize.value(), new NamedThreadFactory("Template-Preloader"));
 
         return true;
     }
@@ -1975,7 +1975,7 @@ public String getConfigComponentName() {
 
     @Override
     public ConfigKey<?>[] getConfigKeys() {
-        return new ConfigKey<?>[] {AllowPublicUserTemplates};
+        return new ConfigKey<?>[] {AllowPublicUserTemplates, TemplatePreloaderPoolSize};
     }
 
     public List<TemplateAdapter> getTemplateAdapters() {