144 lines
3.6 KiB
Go
144 lines
3.6 KiB
Go
package structs
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import (
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"sort"
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"time"
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)
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// FederationStateOp is the operation for a request related to federation states.
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type FederationStateOp string
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const (
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FederationStateUpsert FederationStateOp = "upsert"
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FederationStateDelete FederationStateOp = "delete"
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)
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// FederationStateRequest is used to upsert and delete federation states.
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type FederationStateRequest struct {
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// Datacenter is the target for this request.
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Datacenter string
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// Op is the type of operation being requested.
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Op FederationStateOp
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// State is the federation state to upsert or in the case of a delete
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// only the State.Datacenter field should be set.
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State *FederationState
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// WriteRequest is a common struct containing ACL tokens and other
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// write-related common elements for requests.
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WriteRequest
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}
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// RequestDatacenter returns the datacenter for a given request.
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func (c *FederationStateRequest) RequestDatacenter() string {
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return c.Datacenter
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}
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// FederationStates is a list of federation states.
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type FederationStates []*FederationState
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// Sort sorts federation states by their datacenter.
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func (listings FederationStates) Sort() {
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sort.Slice(listings, func(i, j int) bool {
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return listings[i].Datacenter < listings[j].Datacenter
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})
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}
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// FederationState defines some WAN federation related state that should be
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// cross-shared between all datacenters joined on the WAN. One record exists
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// per datacenter.
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type FederationState struct {
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// Datacenter is the name of the datacenter.
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Datacenter string
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// MeshGateways is a snapshot of the catalog state for all mesh gateways in
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// this datacenter.
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MeshGateways CheckServiceNodes `json:",omitempty"`
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// UpdatedAt keeps track of when this record was modified.
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UpdatedAt time.Time
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// PrimaryModifyIndex is the ModifyIndex of the original data as it exists
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// in the primary datacenter.
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PrimaryModifyIndex uint64
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// RaftIndex is local raft data.
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RaftIndex
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}
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// IsSame is used to compare two federation states for the purposes of
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// anti-entropy.
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func (c *FederationState) IsSame(other *FederationState) bool {
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if c.Datacenter != other.Datacenter {
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return false
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}
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// We don't include the UpdatedAt field in this comparison because that is
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// only updated when we re-persist.
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if len(c.MeshGateways) != len(other.MeshGateways) {
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return false
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}
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// NOTE: we don't bother to sort these since the order is going to be
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// already defined by how the catalog returns results which should be
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// stable enough.
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for i := 0; i < len(c.MeshGateways); i++ {
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a := c.MeshGateways[i]
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b := other.MeshGateways[i]
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if !a.Node.IsSame(b.Node) {
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return false
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}
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if !a.Service.IsSame(b.Service) {
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return false
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}
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if len(a.Checks) != len(b.Checks) {
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return false
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}
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for j := 0; j < len(a.Checks); j++ {
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ca := a.Checks[j]
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cb := b.Checks[j]
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if !ca.IsSame(cb) {
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return false
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}
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}
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}
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return true
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}
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// FederationStateQuery is used to query federation states.
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type FederationStateQuery struct {
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// Datacenter is the target this request is intended for.
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Datacenter string
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// TargetDatacenter is the name of a datacenter to fetch the federation state for.
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TargetDatacenter string
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// Options for queries
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QueryOptions
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}
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// RequestDatacenter returns the datacenter for a given request.
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func (c *FederationStateQuery) RequestDatacenter() string {
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return c.TargetDatacenter
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}
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// FederationStateResponse is the response to a FederationStateQuery request.
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type FederationStateResponse struct {
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State *FederationState
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QueryMeta
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}
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// IndexedFederationStates represents the list of all federation states.
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type IndexedFederationStates struct {
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States FederationStates
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QueryMeta
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}
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