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 * questions. 24 */ 25 26 package java.net.http; 27 28 import java.io.IOException; 29 import java.nio.ByteBuffer; 30 31 class WindowUpdateFrame extends Http2Frame { 32 33 int windowUpdate; 34 35 WindowUpdateFrame() { 36 type = TYPE; 37 } 38 39 public final static int TYPE = 0x8; 40 41 public void setUpdate(int windowUpdate) { 42 this.windowUpdate = windowUpdate; 43 } 44 45 @Override 46 public String toString() { 47 StringBuilder sb = new StringBuilder(); 48 sb.append(super.toString()) 49 .append(" WindowUpdate: ") 50 .append(windowUpdate); 51 return sb.toString(); 52 } 53 54 public int getUpdate() { 55 return this.windowUpdate; 56 } 57 58 /** 59 */ 60 @Override 61 void readIncomingImpl(ByteBufferConsumer bc) throws IOException { 62 if (length != 4) { 63 throw new IOException("Invalid WindowUpdate frame"); 64 } 65 windowUpdate = bc.getInt() & 0x7fffffff; 66 } 67 68 @Override 69 void computeLength() { 70 length = 4; 71 } 72 73 @Override 74 void writeOutgoing(ByteBufferGenerator bg) { 75 super.writeOutgoing(bg); 76 ByteBuffer buf = bg.getBuffer(4); 77 buf.putInt(windowUpdate); 78 } 79 }