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Merge "Introduce orderer sharedconfig mechanism"
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,141 @@ | ||
| /* | ||
| Copyright IBM Corp. 2016 All Rights Reserved. | ||
| Licensed 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 sharedconfig | ||
|
|
||
| import ( | ||
| "fmt" | ||
|
|
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| cb "github.com/hyperledger/fabric/protos/common" | ||
| ab "github.com/hyperledger/fabric/protos/orderer" | ||
|
|
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| "github.com/golang/protobuf/proto" | ||
| "github.com/op/go-logging" | ||
| ) | ||
|
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| // ConsensusTypeKey is the cb.ConfigurationItem type key name for the ConsensusType message | ||
| const ConsensusTypeKey = "ConsensusType" | ||
|
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| // BatchSizeKey is the cb.ConfigurationItem type key name for the BatchSize message | ||
| const BatchSizeKey = "BatchSize" | ||
|
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| var logger = logging.MustGetLogger("orderer/common/sharedconfig") | ||
|
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| func init() { | ||
| logging.SetLevel(logging.DEBUG, "") | ||
| } | ||
|
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| // Manager stores the common shared orderer configuration | ||
| // It is intended to be the primary accessor of ManagerImpl | ||
| // It is intended to discourage use of the other exported ManagerImpl methods | ||
| // which are used for updating the orderer configuration by the ConfigManager | ||
| type Manager interface { | ||
| // ConsensusType returns the configured consensus type | ||
| ConsensusType() string | ||
|
|
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| // BatchSize returns the maximum number of messages to include in a block | ||
| BatchSize() int | ||
| } | ||
|
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| type ordererConfig struct { | ||
| consensusType string | ||
| batchSize int | ||
| } | ||
|
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| // ManagerImpl is an implementation of Manager and configtx.ConfigHandler | ||
| // In general, it should only be referenced as an Impl for the configtx.ConfigManager | ||
| type ManagerImpl struct { | ||
| pendingConfig *ordererConfig | ||
| config *ordererConfig | ||
| } | ||
|
|
||
| // NewManagerImpl creates a new ManagerImpl with the given CryptoHelper | ||
| func NewManagerImpl() *ManagerImpl { | ||
| return &ManagerImpl{ | ||
| config: &ordererConfig{}, | ||
| } | ||
| } | ||
|
|
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| // ConsensusType returns the configured consensus type | ||
| func (pm *ManagerImpl) ConsensusType() string { | ||
| return pm.config.consensusType | ||
| } | ||
|
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| // BatchSize returns the maximum number of messages to include in a block | ||
| func (pm *ManagerImpl) BatchSize() int { | ||
| return pm.config.batchSize | ||
| } | ||
|
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| // BeginConfig is used to start a new configuration proposal | ||
| func (pm *ManagerImpl) BeginConfig() { | ||
| if pm.pendingConfig != nil { | ||
| logger.Fatalf("Programming error, cannot call begin in the middle of a proposal") | ||
| } | ||
| pm.pendingConfig = &ordererConfig{} | ||
| } | ||
|
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| // RollbackConfig is used to abandon a new configuration proposal | ||
| func (pm *ManagerImpl) RollbackConfig() { | ||
| pm.pendingConfig = nil | ||
| } | ||
|
|
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| // CommitConfig is used to commit a new configuration proposal | ||
| func (pm *ManagerImpl) CommitConfig() { | ||
| if pm.pendingConfig == nil { | ||
| logger.Fatalf("Programming error, cannot call commit without an existing proposal") | ||
| } | ||
| pm.config = pm.pendingConfig | ||
| pm.pendingConfig = nil | ||
| } | ||
|
|
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| // ProposeConfig is used to add new configuration to the configuration proposal | ||
| func (pm *ManagerImpl) ProposeConfig(configItem *cb.ConfigurationItem) error { | ||
| if configItem.Type != cb.ConfigurationItem_Orderer { | ||
| return fmt.Errorf("Expected type of ConfigurationItem_Orderer, got %v", configItem.Type) | ||
| } | ||
|
|
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| switch configItem.Key { | ||
| case ConsensusTypeKey: | ||
| consensusType := &ab.ConsensusType{} | ||
| err := proto.Unmarshal(configItem.Value, consensusType) | ||
| if err != nil { | ||
| return fmt.Errorf("Unmarshaling error for ConsensusType: %s", err) | ||
| } | ||
| if pm.config.consensusType == "" { | ||
| // The first configuration we accept the consensus type regardless | ||
| pm.config.consensusType = consensusType.Type | ||
| } | ||
| if consensusType.Type != pm.config.consensusType { | ||
| return fmt.Errorf("Attempted to change the consensus type from %s to %s after init", pm.config.consensusType, consensusType.Type) | ||
| } | ||
|
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| pm.pendingConfig.consensusType = consensusType.Type | ||
| case BatchSizeKey: | ||
| batchSize := &ab.BatchSize{} | ||
| err := proto.Unmarshal(configItem.Value, batchSize) | ||
| if err != nil { | ||
| return fmt.Errorf("Unmarshaling error for BatchSize: %s", err) | ||
| } | ||
|
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| if batchSize.Messages <= 0 { | ||
| return fmt.Errorf("Attempted to set the batch size to %d which is less than or equal to 0", batchSize.Messages) | ||
| } | ||
|
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| pm.pendingConfig.batchSize = int(batchSize.Messages) | ||
| } | ||
|
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| return nil | ||
| } |
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