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SkyWalking
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e88f9853
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SkyWalking
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体验新版 GitCode,发现更多精彩内容 >>
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e88f9853
编写于
7月 21, 2017
作者:
wu-sheng
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电子邮件补丁
差异文件
Support ime-shift-back by Ops or OS, try to keep the id unique.
上级
a31ee9cf
变更
1
隐藏空白更改
内联
并排
Showing
1 changed file
with
48 addition
and
10 deletion
+48
-10
apm-sniffer/apm-agent-core/src/main/java/org/skywalking/apm/agent/core/context/ids/GlobalIdGenerator.java
...walking/apm/agent/core/context/ids/GlobalIdGenerator.java
+48
-10
未找到文件。
apm-sniffer/apm-agent-core/src/main/java/org/skywalking/apm/agent/core/context/ids/GlobalIdGenerator.java
浏览文件 @
e88f9853
package
org.skywalking.apm.agent.core.context.ids
;
import
java.util.Random
;
import
org.skywalking.apm.agent.core.conf.RemoteDownstreamConfig
;
import
org.skywalking.apm.agent.core.dictionary.DictionaryUtil
;
public
final
class
GlobalIdGenerator
{
private
static
final
ThreadLocal
<
I
nteger
>
THREAD_ID_SEQUENCE
=
new
ThreadLocal
<
Integer
>()
{
private
static
final
ThreadLocal
<
I
DContext
>
THREAD_ID_SEQUENCE
=
new
ThreadLocal
<
IDContext
>()
{
@Override
protected
I
nteger
initialValue
()
{
return
0
;
protected
I
DContext
initialValue
()
{
return
new
IDContext
(
System
.
currentTimeMillis
(),
(
short
)
0
)
;
}
};
...
...
@@ -36,17 +37,54 @@ public final class GlobalIdGenerator {
if
(
RemoteDownstreamConfig
.
Agent
.
APPLICATION_INSTANCE_ID
==
DictionaryUtil
.
nullValue
())
{
throw
new
IllegalStateException
();
}
Integer
seq
=
THREAD_ID_SEQUENCE
.
get
();
seq
++;
if
(
seq
>
9999
)
{
seq
=
0
;
}
THREAD_ID_SEQUENCE
.
set
(
seq
);
IDContext
context
=
THREAD_ID_SEQUENCE
.
get
();
return
new
ID
(
RemoteDownstreamConfig
.
Agent
.
APPLICATION_INSTANCE_ID
,
Thread
.
currentThread
().
getId
(),
System
.
currentTimeMillis
()
*
10000
+
seq
context
.
nextSeq
()
);
}
private
static
class
IDContext
{
private
long
lastTimestamp
;
private
short
threadSeq
;
// Just for considering time-shift-back only.
private
long
runRandomTimestamp
;
private
int
lastRandomValue
;
private
Random
random
;
private
IDContext
(
long
lastTimestamp
,
short
threadSeq
)
{
this
.
lastTimestamp
=
lastTimestamp
;
this
.
threadSeq
=
threadSeq
;
}
private
long
nextSeq
()
{
return
timestamp
()
*
10000
+
nextThreadSeq
();
}
private
long
timestamp
()
{
long
currentTimeMillis
=
System
.
currentTimeMillis
();
if
(
currentTimeMillis
<
lastTimestamp
)
{
// Just for considering time-shift-back by Ops or OS. @hanahmily 's suggestion.
if
(
random
==
null
)
{
random
=
new
Random
();
}
if
(
runRandomTimestamp
!=
currentTimeMillis
)
{
lastRandomValue
=
random
.
nextInt
();
runRandomTimestamp
=
currentTimeMillis
;
}
return
lastRandomValue
;
}
else
{
lastTimestamp
=
currentTimeMillis
;
return
lastTimestamp
;
}
}
private
short
nextThreadSeq
()
{
return
threadSeq
++;
}
}
}
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