diff --git a/lib/java/src/org/apache/thrift/server/THsHaServer.java b/lib/java/src/org/apache/thrift/server/THsHaServer.java
index a4ba8d9..b6c475e 100644
--- a/lib/java/src/org/apache/thrift/server/THsHaServer.java
+++ b/lib/java/src/org/apache/thrift/server/THsHaServer.java
@@ -42,10 +42,6 @@
   // for the passing of Invocations from the Selector to workers.
   private ExecutorService invoker;
 
-  protected final int worker_threads;
-  protected final int stop_timeout_val;
-  protected final TimeUnit stop_timeout_unit;
-
   /**
    * Create server with given processor, and server transport. Default server
    * options, TBinaryProtocol for the protocol, and TFramedTransport.Factory on
@@ -187,7 +183,8 @@
   }
 
   /**
-   * Create server with every option fully specified.
+   * Create server with every option fully specified, with an internally managed
+   * ExecutorService
    */
   public THsHaServer( TProcessorFactory processorFactory,
                       TNonblockingServerTransport serverTransport,
@@ -196,23 +193,35 @@
                       TProtocolFactory outputProtocolFactory,
                       Options options)
   {
+    this(processorFactory, serverTransport,
+      outputTransportFactory,
+      inputProtocolFactory, outputProtocolFactory,
+      createInvokerPool(options),
+      options);
+  }
+
+  /**
+   * Create server with every option fully specified, and with an injected
+   * ExecutorService
+   */
+  public THsHaServer( TProcessorFactory processorFactory,
+                      TNonblockingServerTransport serverTransport,
+                      TFramedTransport.Factory outputTransportFactory,
+                      TProtocolFactory inputProtocolFactory,
+                      TProtocolFactory outputProtocolFactory,
+                      ExecutorService executor,
+                      TNonblockingServer.Options options) {
     super(processorFactory, serverTransport,
       outputTransportFactory,
       inputProtocolFactory, outputProtocolFactory,
       options);
 
-    worker_threads = options.workerThreads;
-    stop_timeout_val = options.stopTimeoutVal;
-    stop_timeout_unit = options.stopTimeoutUnit;
+    invoker = executor;
   }
 
   /** @inheritDoc */
   @Override
   public void serve() {
-    if (!startInvokerPool()) {
-      return;
-    }
-
     // start listening, or exit
     if (!startListening()) {
       return;
@@ -234,13 +243,19 @@
     // ungracefully shut down the invoker pool?
   }
 
-  protected boolean startInvokerPool() {
-    // start the invoker pool
-    LinkedBlockingQueue<Runnable> queue = new LinkedBlockingQueue<Runnable>();
-    invoker = new ThreadPoolExecutor(worker_threads, worker_threads,
-      stop_timeout_val, stop_timeout_unit, queue);
+  /**
+   * Helper to create an invoker pool
+   */
+  protected static ExecutorService createInvokerPool(Options options) {
+    int workerThreads = options.workerThreads;
+    int stopTimeoutVal = options.stopTimeoutVal;
+    TimeUnit stopTimeoutUnit = options.stopTimeoutUnit;
 
-    return true;
+    LinkedBlockingQueue<Runnable> queue = new LinkedBlockingQueue<Runnable>();
+    ExecutorService invoker = new ThreadPoolExecutor(workerThreads, workerThreads,
+      stopTimeoutVal, stopTimeoutUnit, queue);
+
+    return invoker;
   }
 
   protected void gracefullyShutdownInvokerPool() {