Constructor
# new FabricContractRepository(adapteropt, clazzopt, trackedEventsopt)
Provides CRUD operations for models within Fabric chaincode contracts
Repository for Hyperledger Fabric chaincode models
sequenceDiagram
participant Contract
participant Repository
participant Adapter
participant StateDB
Contract->>Repository: create(model, ctx)
Repository->>Adapter: prepare(model, pk)
Repository->>Adapter: create(tableName, id, record, transient, ctx)
Adapter->>StateDB: putState(id, serializedData)
StateDB-->>Adapter: Success
Adapter-->>Repository: record
Repository->>Adapter: revert(record, class, pk, id, transient)
Adapter-->>Repository: model
Repository-->>Contract: model
Parameters:
| Name | Type | Attributes | Description |
|---|---|---|---|
adapter |
FabricContractAdapter
|
<optional> |
The adapter for interacting with the state database |
clazz |
Constructor.<M>
|
<optional> |
The model constructor |
trackedEvents |
Array.<(OperationKeys|BulkCrudOperationKeys|string)>
|
<optional> |
Events to track for observer notifications |
Example
```typescript
// In a Fabric chaincode contract class
import { FabricContractRepository, FabricContractAdapter } from '@decaf-ts/for-fabric';Methods
# ObserverHandler() → {ObserverHandler}
Returns a FabricContractRepositoryObservableHandler instance
Gets the observer handler for this repository
The observer handler
ObserverHandler
# async updateObservers(table, event, id, ctx, …args) → {Promise.<void>}
Filters events based on trackedEvents and delegates to the parent method
Updates observers based on tracked events
Parameters:
| Name | Type | Attributes | Description |
|---|---|---|---|
table |
string
|
The table/collection name |
|
event |
OperationKeys
|
BulkCrudOperationKeys
|
string
|
The event type |
|
id |
EventIds
|
The event identifier |
|
ctx |
FabricContractContext
|
The Fabric contract context |
|
args |
Array.<any>
|
<repeatable> |
Additional arguments |
Promise that resolves when observers are updated
Promise.<void>