arthas-watch — Method invoke data observation. See also: `arthas`, `arthas-trace`. More information: <https://artha

Observe the first parameter and return value of method, and expand the nested attributes of the object to 4 levels

watch {{class-pattern}} {{method-pattern}} '{{{ params[0],returnObj }}}' -x 4

When the value of the first parameter of the method is 5, the second parameter and return value are output, and the object is expanded 4 layers

watch {{class-pattern}} {{method-pattern}} '{{{ params[1],returnObj }}}' '{{"5".equals(params[0])}}' -x 4

When the method returns or an exception occurs, observe the count property of the second parameter

watch {{class-pattern}} {{method-pattern}} '{{{ params[1].count }}}' -e -s