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Add descriptions for new functions in the expression language. (#807)

This commit is contained in:
Ozben Evren 2017-12-18 17:08:12 -08:00 committed by Martin Taillefer
parent 7a809a2bb5
commit 11b960bbd7
1 changed files with 6 additions and 1 deletions
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7
_docs/reference/config/mixer/expression-language.md
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@ -27,13 +27,18 @@ CEXL supports the following functions.
|Operator/Function |Definition |Example | Description
|-----------------------------------------
|`==` |Equals |`request.size == 200`
|`match` | Glob match |`match(destination.service, "*.ns1.svc.cluster.local")` | Matches prefix or suffix based on the location of `*`
|`!=` |Not Equals |`request.user != "admin"`
|`||` |Logical OR | `(request.size == 200) || (request.user == "admin")`
|`&&` |Logical AND | `(request.size == 200) && (request.user == "admin")`
|`[ ]` |Map Access | `request.headers["x-id"]`
|`|` |First non empty | `source.labels["app"] | source.labels["svc"] | "unknown"`
|`match` | Glob match |`match(destination.service, "*.ns1.svc.cluster.local")` | Matches prefix or suffix based on the location of `*`
|`ip` | Convert a textual IPv4 address into the `IP_ADDRESS` type | `source.ip == ip("10.11.12.13")` | Use the `ip` function to create an `IP_ADDRESS` literal.
|`timestamp` | Convert a textual timestamp in RFC 3339 format into the `TIMESTAMP` type |`timestamp("2015-01-02T15:04:35Z")` | Use the `timestamp` function to create a `TIMESTAMP` literal.
|`.matches` | Regular expression match | `"svc.*".matches(destination.service)` | Matches `destination.service` against regular expression pattern `"svc.*"`.
|`.startsWith` | string prefix match | `destination.service.startsWith("acme")` | Checks whether `destination.service` starts with `"acme"`.
|`.endsWith` | string postfix match | `destination.service.endsWith("acme")` | Checks whether `destination.service` ends with `"acme"`.
## Type checking