1 /*
   2  * Copyright (c) 2015, 2016, Oracle and/or its affiliates. All rights reserved.
   3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   4  *
   5  * This code is free software; you can redistribute it and/or modify it
   6  * under the terms of the GNU General Public License version 2 only, as
   7  * published by the Free Software Foundation.  Oracle designates this
   8  * particular file as subject to the "Classpath" exception as provided
   9  * by Oracle in the LICENSE file that accompanied this code.
  10  *
  11  * This code is distributed in the hope that it will be useful, but WITHOUT
  12  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  13  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  14  * version 2 for more details (a copy is included in the LICENSE file that
  15  * accompanied this code).
  16  *
  17  * You should have received a copy of the GNU General Public License version
  18  * 2 along with this work; if not, write to the Free Software Foundation,
  19  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  20  *
  21  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  22  * or visit www.oracle.com if you need additional information or have any
  23  */
  24 
  25 package java.net.http;
  26 
  27 import java.nio.channels.SelectableChannel;
  28 import java.nio.channels.SelectionKey;
  29 import java.nio.channels.SocketChannel;
  30 
  31 /**
  32  * Event handling interface from HttpClientImpl's selector.
  33  *
  34  * If BLOCKING is set, then the channel will be put in blocking
  35  * mode prior to handle() being called. If false, then it remains non-blocking.
  36  *
  37  * If REPEATING is set then the event is not cancelled after being posted.
  38  */
  39 abstract class AsyncEvent {
  40 
  41     public static final int BLOCKING = 0x1; // non blocking if not set
  42     public static final int REPEATING = 0x2; // one off event if not set
  43 
  44     protected final int flags;
  45 
  46     AsyncEvent(int flags) {
  47         this.flags = flags;
  48     }
  49 
  50     /** Returns the channel */
  51     public abstract SelectableChannel channel();
  52 
  53     /** Returns the selector interest op flags OR'd */
  54     public abstract int interestOps();
  55 
  56     /** Called when event occurs */
  57     public abstract void handle();
  58 
  59     /** Called when selector is shutting down. Abort all exchanges. */
  60     public abstract void abort();
  61 
  62     public boolean blocking() {
  63         return (flags & BLOCKING) != 0;
  64     }
  65 
  66     public boolean repeating() {
  67         return (flags & REPEATING) != 0;
  68     }
  69 }