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Break packet reading into states to reduce object churn.

This commit is contained in:
md_5 2013-02-13 12:11:37 +11:00
parent 38fce03c91
commit 58689d2251
1 changed files with 57 additions and 17 deletions
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74
CraftBukkit-Patches/0026-Netty.patch
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@ -1,4 +1,4 @@
From 9f9f234ce35b796858b65bb85c5260f2ddd80b16 Mon Sep 17 00:00:00 2001
From 840a6fa0c4febdcdb5b9e0a7af30a7d04d7e3172 Mon Sep 17 00:00:00 2001
From: md_5 <md_5@live.com.au>
Date: Sun, 3 Feb 2013 10:24:33 +1100
Subject: [PATCH] Netty
@ -20,10 +20,11 @@ This commit is licensed under the Creative Commons Attribution-ShareAlike 3.0 Un
.../org/spigotmc/netty/NettyNetworkManager.java | 221 ++++++++++++++++++
.../org/spigotmc/netty/NettyServerConnection.java | 105 +++++++++
.../org/spigotmc/netty/NettySocketAdaptor.java | 248 +++++++++++++++++++++
.../java/org/spigotmc/netty/PacketDecoder.java | 47 ++++
.../java/org/spigotmc/netty/PacketDecoder.java | 63 ++++++
.../java/org/spigotmc/netty/PacketEncoder.java | 43 ++++
.../java/org/spigotmc/netty/PacketListener.java | 100 +++++++++
11 files changed, 851 insertions(+), 7 deletions(-)
src/main/java/org/spigotmc/netty/ReadState.java | 16 ++
12 files changed, 883 insertions(+), 7 deletions(-)
create mode 100644 src/main/java/org/spigotmc/netty/CipherCodec.java
create mode 100644 src/main/java/org/spigotmc/netty/NettyNetworkManager.java
create mode 100644 src/main/java/org/spigotmc/netty/NettyServerConnection.java
@ -31,6 +32,7 @@ This commit is licensed under the Creative Commons Attribution-ShareAlike 3.0 Un
create mode 100644 src/main/java/org/spigotmc/netty/PacketDecoder.java
create mode 100644 src/main/java/org/spigotmc/netty/PacketEncoder.java
create mode 100644 src/main/java/org/spigotmc/netty/PacketListener.java
create mode 100644 src/main/java/org/spigotmc/netty/ReadState.java
diff --git a/pom.xml b/pom.xml
index f17bd19..fc7bfa0 100644
@ -800,10 +802,10 @@ index 0000000..a3b86b8
+}
diff --git a/src/main/java/org/spigotmc/netty/PacketDecoder.java b/src/main/java/org/spigotmc/netty/PacketDecoder.java
new file mode 100644
index 0000000..089aa21
index 0000000..6ecbca7
--- /dev/null
+++ b/src/main/java/org/spigotmc/netty/PacketDecoder.java
@@ -0,0 +1,47 @@
@@ -0,0 +1,63 @@
+package org.spigotmc.netty;
+
+import io.netty.buffer.ByteBuf;
@ -820,9 +822,14 @@ index 0000000..089aa21
+ * backs the input {@link ByteBuf}. Reads an unsigned byte packet header and
+ * then decodes the packet accordingly.
+ */
+public class PacketDecoder extends ReplayingDecoder<Packet> {
+public class PacketDecoder extends ReplayingDecoder<ReadState> {
+
+ private DataInputStream input;
+ private Packet packet;
+
+ public PacketDecoder() {
+ super(ReadState.HEADER);
+ }
+
+ @Override
+ public Packet decode(ChannelHandlerContext ctx, ByteBuf in) throws Exception {
@ -830,25 +837,36 @@ index 0000000..089aa21
+ input = new DataInputStream(new ByteBufInputStream(in));
+ }
+
+ short packetId = in.readUnsignedByte();
+ Packet packet = Packet.d(packetId);
+ if (packet == null) {
+ throw new IOException("Bad packet id " + packetId);
+ }
+ switch (state()) {
+ case HEADER:
+ short packetId = in.readUnsignedByte();
+ packet = Packet.d(packetId);
+ if (packet == null) {
+ throw new IOException("Bad packet id " + packetId);
+ }
+ checkpoint(ReadState.DATA);
+ case DATA:
+ try {
+ packet.a(input);
+ } catch (EOFException ex) {
+ return null;
+ }
+
+ try {
+ packet.a(input);
+ } catch (EOFException ex) {
+ return null;
+ }
+ checkpoint(ReadState.HEADER);
+ Packet ret = packet;
+ packet = null;
+
+ return packet;
+ return ret;
+ default:
+ throw new IllegalStateException();
+ }
+ }
+
+ @Override
+ public void freeInboundBuffer(ChannelHandlerContext ctx) throws Exception {
+ super.freeInboundBuffer(ctx);
+ input = null;
+ packet = null;
+ }
+}
diff --git a/src/main/java/org/spigotmc/netty/PacketEncoder.java b/src/main/java/org/spigotmc/netty/PacketEncoder.java
@ -1006,6 +1024,28 @@ index 0000000..8e3b932
+ return packet;
+ }
+}
diff --git a/src/main/java/org/spigotmc/netty/ReadState.java b/src/main/java/org/spigotmc/netty/ReadState.java
new file mode 100644
index 0000000..5dc3754
--- /dev/null
+++ b/src/main/java/org/spigotmc/netty/ReadState.java
@@ -0,0 +1,16 @@
+package org.spigotmc.netty;
+
+/**
+ * Stores the state of the packet currently being read.
+ */
+public enum ReadState {
+
+ /**
+ * Indicates the byte representing the ID has been read.
+ */
+ HEADER,
+ /**
+ * Shows the packet body is being read.
+ */
+ DATA;
+}
--
1.8.1-rc2