Package com.jcraft.jsch.juz
Class Compression
- java.lang.Object
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- com.jcraft.jsch.juz.Compression
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- All Implemented Interfaces:
Compression
public class Compression extends java.lang.Object implements Compression
This example demonstrates the packet compression without using jzlib[1].The ssh protocol adopts zlib[2] for the packet compression. Fortunately, JDK has provided wrapper classes for zlib(j.u.z.{Deflater, Inflater}), but it does not expose enough functionality of zlib, unfortunately; it must not allow to compress data with SYNC_FLUSH. So, JSch has been using jzlib by the default. After 12 years of bug parade entry[3] filing, Java7 has revised j.u.z.Deflater, and SYNC_FLUSH has been supported at last. This example shows how to enable the packet compression by using JDK's java.util.zip package.
[1] http://www.jcraft.com/jzlib/ [2] http://www.zlib.net/ [3] https://bugs.openjdk.java.net/browse/JDK-4206909
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Field Summary
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Fields inherited from interface com.jcraft.jsch.Compression
DEFLATER, INFLATER
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Constructor Summary
Constructors Constructor Description Compression()
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Method Summary
All Methods Instance Methods Concrete Methods Modifier and Type Method Description byte[]
compress(byte[] buf, int start, int[] end)
void
end()
void
init(int type, int level)
void
init(int type, int level, Session session)
byte[]
uncompress(byte[] buf, int start, int[] len)
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Method Detail
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end
public void end()
- Specified by:
end
in interfaceCompression
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init
public void init(int type, int level, Session session)
- Specified by:
init
in interfaceCompression
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init
public void init(int type, int level)
- Specified by:
init
in interfaceCompression
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compress
public byte[] compress(byte[] buf, int start, int[] end)
- Specified by:
compress
in interfaceCompression
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uncompress
public byte[] uncompress(byte[] buf, int start, int[] len)
- Specified by:
uncompress
in interfaceCompression
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