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纯Java实现的CRC32算法, 代替原来的调用native方法的实现. 在高并发下,可以提升每条消息计算CRC32的速度.
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Apr 22, 2016
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@@ -32,12 +32,13 @@ | |
import java.util.zip.DeflaterOutputStream; | ||
import java.util.zip.InflaterInputStream; | ||
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import com.alibaba.rocketmq.common.utils.PureJavaCrc32; | ||
import com.alibaba.rocketmq.remoting.common.RemotingHelper; | ||
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/** | ||
* 各种方法大杂烩 | ||
* | ||
* | ||
* @author shijia.wxr<[email protected]> | ||
*/ | ||
public class UtilAll { | ||
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@@ -190,7 +191,7 @@ public static String timeMillisToHumanString2(final long t) { | |
/** | ||
* 返回日期时间格式,精度到秒<br> | ||
* 格式如下:2013122305190000 | ||
* | ||
* | ||
* @param t | ||
* @return | ||
*/ | ||
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@@ -248,7 +249,7 @@ public static final int crc32(byte[] array) { | |
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public static final int crc32(byte[] array, int offset, int length) { | ||
CRC32 crc32 = new CRC32(); | ||
PureJavaCrc32 crc32 = new PureJavaCrc32(); | ||
crc32.update(array, offset, length); | ||
return (int) (crc32.getValue() & 0x7FFFFFFF); | ||
} | ||
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