--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/java.net.http/share/classes/jdk/internal/net/http/AsyncTriggerEvent.java	Tue Apr 17 08:54:17 2018 -0700
@@ -0,0 +1,59 @@
+/*
+ * Copyright (c) 2017, 2018, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+package jdk.internal.net.http;
+
+import java.io.IOException;
+import java.nio.channels.SelectableChannel;
+import java.util.Objects;
+import java.util.function.Consumer;
+
+/**
+ * An asynchronous event which is triggered only once from the selector manager
+ * thread as soon as event registration are handled.
+ */
+final class AsyncTriggerEvent extends AsyncEvent{
+
+    private final Runnable trigger;
+    private final Consumer<? super IOException> errorHandler;
+    AsyncTriggerEvent(Consumer<? super IOException> errorHandler,
+                      Runnable trigger) {
+        super(0);
+        this.trigger = Objects.requireNonNull(trigger);
+        this.errorHandler = Objects.requireNonNull(errorHandler);
+    }
+    /** Returns null */
+    @Override
+    public SelectableChannel channel() { return null; }
+    /** Returns 0 */
+    @Override
+    public int interestOps() { return 0; }
+    @Override
+    public void handle() { trigger.run(); }
+    @Override
+    public void abort(IOException ioe) { errorHandler.accept(ioe); }
+    @Override
+    public boolean repeating() { return false; }
+}