com.github.zhujk.resp.exception.RespException.kt Maven / Gradle / Ivy

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package com.github.zhujk.resp.exception

class RespException(val code: Int, val msg: String) : RuntimeException(msg)

// guava
val Throwable.rootCause: Throwable
    get() {
        var throwable = this
        // Keep a second pointer that slowly walks the causal chain. If the fast pointer ever catches
        // the slower pointer, then there's a loop.
        var slowPointer: Throwable? = throwable
        var advanceSlowPointer = false

        var cause: Throwable? = throwable.cause
        while (cause != null) {
            throwable = cause

            if (throwable === slowPointer) {
                throw IllegalArgumentException("Loop in causal chain detected.", throwable)
            }
            if (advanceSlowPointer) {
                slowPointer = slowPointer?.cause
            }
            advanceSlowPointer = !advanceSlowPointer // only advance every other iteration
            cause = throwable.cause
        }
        return throwable
    }