|
|
|
|
|
getstatic
|
|
|
|
|
|
===
|
|
|
|
|
|
|
|
|
|
|
|
* 推荐直接使用[ognl](ognl.md)命令，更加灵活。
|
|
|
|
|
|
|
|
|
|
|
|
通过getstatic命令可以方便的查看类的静态属性。使用方法为`getstatic class_name field_name`
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
```bash
|
|
|
|
|
|
$ getstatic demo.MathGame random
|
|
|
|
|
|
field: random
|
|
|
|
|
|
@Random[
|
|
|
|
|
|
serialVersionUID=@Long[3905348978240129619],
|
|
|
|
|
|
seed=@AtomicLong[120955813885284],
|
|
|
|
|
|
multiplier=@Long[25214903917],
|
|
|
|
|
|
addend=@Long[11],
|
|
|
|
|
|
mask=@Long[281474976710655],
|
|
|
|
|
|
DOUBLE_UNIT=@Double[1.1102230246251565E-16],
|
|
|
|
|
|
BadBound=@String[bound must be positive],
|
|
|
|
|
|
BadRange=@String[bound must be greater than origin],
|
|
|
|
|
|
BadSize=@String[size must be non-negative],
|
|
|
|
|
|
seedUniquifier=@AtomicLong[-3282039941672302964],
|
|
|
|
|
|
nextNextGaussian=@Double[0.0],
|
|
|
|
|
|
haveNextNextGaussian=@Boolean[false],
|
|
|
|
|
|
serialPersistentFields=@ObjectStreamField[][isEmpty=false;size=3],
|
|
|
|
|
|
unsafe=@Unsafe[sun.misc.Unsafe@2eaa1027],
|
|
|
|
|
|
seedOffset=@Long[24],
|
|
|
|
|
|
]
|
|
|
|
|
|
```
|
|
|
|
|
|
|
|
|
|
|
|
如果该静态属性是一个复杂对象，还可以支持在该属性上通过ognl表示进行遍历，过滤，访问对象的内部属性等操作。
|
|
|
|
|
|
|
|
|
|
|
|
* OGNL特殊用法请参考：[https://github.com/alibaba/arthas/issues/71](https://github.com/alibaba/arthas/issues/71)
|
|
|
|
|
|
* OGNL表达式官方指南：[https://commons.apache.org/proper/commons-ognl/language-guide.html](https://commons.apache.org/proper/commons-ognl/language-guide.html)
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
例如，假设n是一个Map，Map的Key是一个Enum，我们想过滤出Map中Key为某个Enum的值，可以写如下命令
|
|
|
|
|
|
|
|
|
|
|
|
```
|
|
|
|
|
|
$ getstatic com.alibaba.arthas.Test n 'entrySet().iterator.{? #this.key.name()=="STOP"}'
|
|
|
|
|
|
field: n
|
|
|
|
|
|
@ArrayList[
|
|
|
|
|
|
@Node[STOP=bbb],
|
|
|
|
|
|
]
|
|
|
|
|
|
Affect(row-cnt:1) cost in 68 ms.
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
$ getstatic com.alibaba.arthas.Test m 'entrySet().iterator.{? #this.key=="a"}'
|
|
|
|
|
|
field: m
|
|
|
|
|
|
@ArrayList[
|
|
|
|
|
|
@Node[a=aaa],
|
|
|
|
|
|
]
|
|
|
|
|
|
```
|
