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historyExists.go
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/
historyExists.go
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// The MIT License (MIT)
//
// Copyright (c) 2017-2020 Uber Technologies Inc.
//
// Permission is hereby granted, free of charge, to any person obtaining a copy
// of this software and associated documentation files (the "Software"), to deal
// in the Software without restriction, including without limitation the rights
// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
// copies of the Software, and to permit persons to whom the Software is
// furnished to do so, subject to the following conditions:
//
// The above copyright notice and this permission notice shall be included in all
// copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
// SOFTWARE.
package invariant
import (
"context"
c "github.com/uber/cadence/common"
"github.com/uber/cadence/common/cache"
"github.com/uber/cadence/common/persistence"
"github.com/uber/cadence/common/reconciliation/entity"
"github.com/uber/cadence/common/types"
)
const (
historyPageSize = 1
)
type (
historyExists struct {
pr persistence.Retryer
dc cache.DomainCache
}
)
func NewHistoryExists(
pr persistence.Retryer, dc cache.DomainCache,
) Invariant {
return &historyExists{
pr: pr,
dc: dc,
}
}
func (h *historyExists) Check(
ctx context.Context,
execution interface{},
) CheckResult {
if checkResult := validateCheckContext(ctx, h.Name()); checkResult != nil {
return *checkResult
}
concreteExecution, ok := execution.(*entity.ConcreteExecution)
if !ok {
return CheckResult{
CheckResultType: CheckResultTypeFailed,
InvariantName: h.Name(),
Info: "failed to check: expected concrete execution",
}
}
domainID := concreteExecution.GetDomainID()
domainName, errorDomainName := h.dc.GetDomainName(domainID)
if errorDomainName != nil {
return CheckResult{
CheckResultType: CheckResultTypeFailed,
InvariantName: h.Name(),
Info: "failed to check: expected DomainName",
InfoDetails: errorDomainName.Error(),
}
}
readHistoryBranchReq := &persistence.ReadHistoryBranchRequest{
BranchToken: concreteExecution.BranchToken,
MinEventID: c.FirstEventID,
MaxEventID: c.FirstEventID + 1,
PageSize: historyPageSize,
NextPageToken: nil,
ShardID: c.IntPtr(concreteExecution.ShardID),
DomainName: domainName,
}
readHistoryBranchResp, readHistoryBranchErr := h.pr.ReadHistoryBranch(ctx, readHistoryBranchReq)
stillExists, existsCheckError := ExecutionStillExists(ctx, &concreteExecution.Execution, h.pr, h.dc)
if existsCheckError != nil {
return CheckResult{
CheckResultType: CheckResultTypeFailed,
InvariantName: h.Name(),
Info: "failed to check if concrete execution still exists",
InfoDetails: existsCheckError.Error(),
}
}
if !stillExists {
return CheckResult{
CheckResultType: CheckResultTypeHealthy,
InvariantName: h.Name(),
Info: "determined execution was healthy because concrete execution no longer exists",
}
}
if readHistoryBranchErr != nil {
switch readHistoryBranchErr.(type) {
case *types.EntityNotExistsError:
return CheckResult{
CheckResultType: CheckResultTypeCorrupted,
InvariantName: h.Name(),
Info: "concrete execution exists but history does not exist",
InfoDetails: readHistoryBranchErr.Error(),
}
default:
return CheckResult{
CheckResultType: CheckResultTypeFailed,
InvariantName: h.Name(),
Info: "failed to verify if history exists",
InfoDetails: readHistoryBranchErr.Error(),
}
}
}
if readHistoryBranchResp == nil || len(readHistoryBranchResp.HistoryEvents) == 0 {
return CheckResult{
CheckResultType: CheckResultTypeCorrupted,
InvariantName: h.Name(),
Info: "concrete execution exists but got empty history",
}
}
return CheckResult{
CheckResultType: CheckResultTypeHealthy,
InvariantName: h.Name(),
}
}
func (h *historyExists) Fix(
ctx context.Context,
execution interface{},
) FixResult {
if fixResult := validateFixContext(ctx, h.Name()); fixResult != nil {
return *fixResult
}
fixResult, checkResult := checkBeforeFix(ctx, h, execution)
if fixResult != nil {
return *fixResult
}
fixResult = DeleteExecution(ctx, execution, h.pr, h.dc)
fixResult.CheckResult = *checkResult
fixResult.InvariantName = h.Name()
return *fixResult
}
func (h *historyExists) Name() Name {
return HistoryExists
}
// ExecutionStillExists returns true if execution still exists in persistence, false otherwise.
// Returns error on failure to confirm.
func ExecutionStillExists(
ctx context.Context,
exec *entity.Execution,
pr persistence.Retryer,
dc cache.DomainCache,
) (bool, error) {
domainName, errorDomainName := dc.GetDomainName(exec.DomainID)
if errorDomainName != nil {
return false, errorDomainName
}
req := &persistence.GetWorkflowExecutionRequest{
DomainID: exec.DomainID,
Execution: types.WorkflowExecution{
WorkflowID: exec.WorkflowID,
RunID: exec.RunID,
},
DomainName: domainName,
}
_, err := pr.GetWorkflowExecution(ctx, req)
if err == nil {
return true, nil
}
switch err.(type) {
case *types.EntityNotExistsError:
return false, nil
default:
return false, err
}
}