MinatoWu commented on code in PR #855: URL: https://github.com/apache/incubator-seata-go/pull/855#discussion_r2186897224
########## pkg/saga/rm/saga_resource_manager.go: ########## @@ -0,0 +1,136 @@ +/* + * Licensed to the Apache Software Foundation (ASF) under one or more + * contributor license agreements. See the NOTICE file distributed with + * this work for additional information regarding copyright ownership. + * The ASF licenses this file to You under the Apache License, Version 2.0 + * (the "License"); you may not use this file except in compliance with + * the License. You may obtain a copy of the License at + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, software + * distributed under the License is distributed on an "AS IS" BASIS, + * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + * See the License for the specific language governing permissions and + * limitations under the License. + */ + +package rm + +import ( + "bytes" + "context" + "fmt" + "github.com/seata/seata-go/pkg/protocol/branch" + "github.com/seata/seata-go/pkg/protocol/message" + "github.com/seata/seata-go/pkg/rm" + "github.com/seata/seata-go/pkg/saga/statemachine/engine/exception" + "github.com/seata/seata-go/pkg/saga/statemachine/statelang" + seataErrors "github.com/seata/seata-go/pkg/util/errors" + "log" + "sync" +) + +type SagaResourceManager struct { + rmRemoting *rm.RMRemoting + resourceCache sync.Map +} + +func (s *SagaResourceManager) RegisterResource(resource rm.Resource) error { + if _, ok := resource.(*SagaResource); !ok { + panic(fmt.Sprintf("register saga resource error, SagaResource is needed, param %v", resource)) + } + s.resourceCache.Store(resource.GetResourceId(), resource) + return s.rmRemoting.RegisterResource(resource) + +} + +func (s *SagaResourceManager) GetCachedResources() *sync.Map { + return &s.resourceCache +} + +func (s *SagaResourceManager) GetBranchType() branch.BranchType { + return branch.BranchTypeSAGA +} + +func (s *SagaResourceManager) BranchCommit(ctx context.Context, resource rm.BranchResource) (branch.BranchStatus, error) { + engine := GetStateMachineEngine() + stMaInst, err := engine.Forward(ctx, resource.Xid, nil) + if err != nil { + if fie, ok := exception.IsForwardInvalidException(err); ok { + log.Printf("StateMachine forward failed, xid: %s, err: %v", resource.Xid, err) + if fie.ErrCode == fmt.Sprintf("%v", seataErrors.StateMachineInstanceNotExists) { + return branch.BranchStatusPhasetwoCommitted, nil + } + } + log.Printf("StateMachine forward failed, xid: %s, err: %v", resource.Xid, err) + return branch.BranchStatusPhasetwoCommitFailedRetryable, err + } + + status := stMaInst.Status() + compStatus := stMaInst.CompensationStatus() + + switch { + case status == statelang.SU && compStatus == "": + return branch.BranchStatusPhasetwoCommitted, nil + case compStatus == statelang.SU: + return branch.BranchStatusPhasetwoRollbacked, nil + case compStatus == statelang.FA || compStatus == statelang.UN: + return branch.BranchStatusPhasetwoRollbackFailedRetryable, nil + case status == statelang.FA && compStatus == "": + return branch.BranchStatusPhaseoneFailed, nil + default: + return branch.BranchStatusPhasetwoCommitFailedRetryable, nil + } +} + +func (s *SagaResourceManager) BranchRollback(ctx context.Context, resource rm.BranchResource) (branch.BranchStatus, error) { + engine := GetStateMachineEngine() + stMaInst, err := engine.ReloadStateMachineInstance(ctx, resource.Xid) + if err != nil || stMaInst == nil { + return branch.BranchStatusPhasetwoRollbacked, nil + } + + strategy := stMaInst.StateMachine().RecoverStrategy() + appData := resource.ApplicationData + isTimeoutRollback := bytes.Equal(appData, []byte{byte(message.GlobalStatusTimeoutRollbacking)}) || bytes.Equal(appData, []byte{byte(message.GlobalStatusTimeoutRollbackRetrying)}) + + if strategy == statelang.Forward && isTimeoutRollback { + log.Printf("Retry by custom recover strategy [Forward] on timeout, SAGA global[%s]", resource.Xid) + return branch.BranchStatusPhasetwoCommitFailedRetryable, nil + } + + stMaInst, err = engine.Compensate(ctx, resource.Xid, nil) + if err == nil && stMaInst.CompensationStatus() == statelang.SU { + return branch.BranchStatusPhasetwoRollbacked, nil + } + + if fie, ok := exception.IsEngineExecutionException(err); ok { + log.Printf("StateMachine compensate failed, xid: %s, err: %v", resource.Xid, err) + if fie.ErrCode == fmt.Sprintf("%v", seataErrors.StateMachineInstanceNotExists) { + return branch.BranchStatusPhasetwoRollbacked, nil + } + } + log.Printf("StateMachine compensate failed, xid: %s, err: %v", resource.Xid, err) + return branch.BranchStatusPhasetwoRollbackFailedRetryable, err +} + +func (s *SagaResourceManager) BranchRegister(ctx context.Context, param rm.BranchRegisterParam) (int64, error) { + //TODO implement me Review Comment: Reference java side **saga rm** does not seem to implement these methods -- This is an automated message from the Apache Git Service. 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