forked from jetty/jetty.project
-
Notifications
You must be signed in to change notification settings - Fork 0
/
ByteAccumulator.java
130 lines (113 loc) · 3.72 KB
/
ByteAccumulator.java
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
//
// ========================================================================
// Copyright (c) 1995-2020 Mort Bay Consulting Pty Ltd and others.
// ------------------------------------------------------------------------
// All rights reserved. This program and the accompanying materials
// are made available under the terms of the Eclipse Public License v1.0
// and Apache License v2.0 which accompanies this distribution.
//
// The Eclipse Public License is available at
// http://www.eclipse.org/legal/epl-v10.html
//
// The Apache License v2.0 is available at
// http://www.opensource.org/licenses/apache2.0.php
//
// You may elect to redistribute this code under either of these licenses.
// ========================================================================
//
package org.eclipse.jetty.websocket.common.extensions.compress;
import java.nio.ByteBuffer;
import java.util.ArrayList;
import java.util.List;
import org.eclipse.jetty.io.ByteBufferPool;
import org.eclipse.jetty.util.BufferUtil;
import org.eclipse.jetty.websocket.api.MessageTooLargeException;
public class ByteAccumulator
{
private final List<ByteBuffer> chunks = new ArrayList<>();
private final int maxSize;
private int length = 0;
private final ByteBufferPool bufferPool;
public ByteAccumulator(int maxOverallBufferSize)
{
this(maxOverallBufferSize, null);
}
public ByteAccumulator(int maxOverallBufferSize, ByteBufferPool bufferPool)
{
this.maxSize = maxOverallBufferSize;
this.bufferPool = bufferPool;
}
public void copyChunk(ByteBuffer buffer)
{
int length = buffer.remaining();
if (this.length + length > maxSize)
{
String err = String.format("Resulting message size [%,d] is too large for configured max of [%,d]", this.length + length, maxSize);
throw new MessageTooLargeException(err);
}
if (buffer.hasRemaining())
{
chunks.add(buffer);
this.length += length;
}
else
{
// release 0 length buffer directly
if (bufferPool != null)
bufferPool.release((ByteBuffer)buffer.clear());
}
}
public void copyChunk(byte[] buf, int offset, int length)
{
if (this.length + length > maxSize)
{
String err = String.format("Resulting message size [%,d] is too large for configured max of [%,d]", this.length + length, maxSize);
throw new MessageTooLargeException(err);
}
chunks.add(ByteBuffer.wrap(buf, offset, length));
this.length += length;
}
public int getLength()
{
return length;
}
int getMaxSize()
{
return maxSize;
}
ByteBuffer newByteBuffer(int size)
{
if (bufferPool == null)
{
return ByteBuffer.allocate(size);
}
return (ByteBuffer)bufferPool.acquire(size, false).clear();
}
public void transferTo(ByteBuffer buffer)
{
if (buffer.remaining() < length)
{
throw new IllegalArgumentException(String.format("Not enough space in ByteBuffer remaining [%d] for accumulated buffers length [%d]",
buffer.remaining(), length));
}
int position = buffer.position();
for (ByteBuffer chunk : chunks)
{
buffer.put(chunk);
}
BufferUtil.flipToFlush(buffer, position);
}
void recycle()
{
length = 0;
if (bufferPool == null)
{
return;
}
for (ByteBuffer chunk : chunks)
{
bufferPool.release((ByteBuffer)chunk.clear());
}
chunks.clear();
}
}