Struct QueryOptions 

pub struct QueryOptions {

    pub Namespace: Option<String>,
    pub Datacenter: Option<String>,
    pub AllowStale: Option<bool>,
    pub RequireConsistent: Option<bool>,
    pub UseCache: Option<bool>,
    pub MaxAge: Option<Duration>,
    pub StaleIfError: Option<Duration>,
    pub WaitIndex: Option<usize>,
    pub WaitHash: Option<String>,
    pub WaitTime: Option<Duration>,
    pub Token: Option<String>,
    pub Near: Option<String>,
    pub NodeMeta: Option<HashMap<String, String>>,
    pub RelayFactor: Option<u8>,
    pub LocalOnly: Option<bool>,
    pub Connect: Option<bool>,
    pub Filter: Option<String>,
}

QueryOptions are used to parameterize a query

Fields

Namespace: Option<String>

Namespace overrides the default namespace Note: Namespaces are available only in Consul Enterprise

Datacenter: Option<String>

Providing a datacenter overwrites the DC provided by the Config

AllowStale: Option<bool>

AllowStale allows any Consul server (non-leader) to service a read. This allows for lower latency and higher throughput

RequireConsistent: Option<bool>

RequireConsistent forces the read to be fully consistent. This is more expensive but prevents ever performing a stale read.

UseCache: Option<bool>

UseCache requests that the agent cache results locally. See https:///www.consul.io/api/features/caching.html for more details on the semantics.

MaxAge: Option<Duration>

MaxAge limits how old a cached value will be returned if UseCache is true. If there is a cached response that is older than the MaxAge, it is treated as a cache miss and a new fetch invoked. If the fetch fails, the error is returned. Clients that wish to allow for stale results on error can set StaleIfError to a longer duration to change this behavior. It is ignored if the endpoint supports background refresh caching. See https:///www.consul.io/api/features/caching.html for more details.

StaleIfError: Option<Duration>

StaleIfError specifies how stale the client will accept a cached response if the servers are unavailable to fetch a fresh one. Only makes sense when UseCache is true and MaxAge is set to a lower, non-zero value. It is ignored if the endpoint supports background refresh caching. See https:///www.consul.io/api/features/caching.html for more details.

WaitIndex: Option<usize>

WaitIndex is used to enable a blocking query. Waits until the timeout or the next index is reached

WaitHash: Option<String>

WaitHash is used by some endpoints instead of WaitIndex to perform blocking on state based on a hash of the response rather than a monotonic index. This is required when the state being blocked on is not stored in Raft, for example agent-local proxy configuration.

WaitTime: Option<Duration>

WaitTime is used to bound the duration of a wait. Defaults to that of the Config, but can be overridden.

Token: Option<String>

Token is used to provide a per-request ACL token which overrides the agent’s default token.

Near: Option<String>

Near is used to provide a node name that will sort the results in ascending order based on the estimated round trip time from that node. Setting this to “_agent” will use the agent’s node for the sort.

NodeMeta: Option<HashMap<String, String>>

NodeMeta is used to filter results by nodes with the given metadata key/value pairs. Currently, only one key/value pair can be provided for filtering.

RelayFactor: Option<u8>

RelayFactor is used in keyring operations to cause responses to be relayed back to the sender through N other random nodes. Must be a value from 0 to 5 (inclusive).

LocalOnly: Option<bool>

LocalOnly is used in keyring list operation to force the keyring query to only hit local servers (no WAN traffic).

Connect: Option<bool>

Connect filters prepared query execution to only include Connect-capable services. This currently affects prepared query execution.

Filter: Option<String>

Filter requests filtering data prior to it being returned. The string is a go-bexpr compatible expression.

Trait Implementations

impl Clone for QueryOptions

fn clone(&self) -> QueryOptions

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for QueryOptions

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl Default for QueryOptions

fn default() -> QueryOptions

Returns the “default value” for a type.

impl<'de> Deserialize<'de> for QueryOptions

fn deserialize<__D>(__deserializer: __D) -> Result<Self, __D::Error>

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl Serialize for QueryOptions

fn serialize<__S>(&self, __serializer: __S) -> Result<__S::Ok, __S::Error>

where __S: Serializer,

Serialize this value into the given Serde serializer.