github.com/adnan-c/fabric_e2e_couchdb@v0.6.1-preview.0.20170228180935-21ce6b23cf91/core/chaincode/ccproviderimpl.go (about) 1 /* 2 Copyright IBM Corp. 2017 All Rights Reserved. 3 4 Licensed under the Apache License, Version 2.0 (the "License"); 5 you may not use this file except in compliance with the License. 6 You may obtain a copy of the License at 7 8 http://www.apache.org/licenses/LICENSE-2.0 9 10 Unless required by applicable law or agreed to in writing, software 11 distributed under the License is distributed on an "AS IS" BASIS, 12 WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 See the License for the specific language governing permissions and 14 limitations under the License. 15 */ 16 17 package chaincode 18 19 import ( 20 "context" 21 22 "fmt" 23 24 "github.com/hyperledger/fabric/core/common/ccprovider" 25 "github.com/hyperledger/fabric/core/ledger" 26 pb "github.com/hyperledger/fabric/protos/peer" 27 ) 28 29 // ccProviderFactory implements the ccprovider.ChaincodeProviderFactory 30 // interface and returns instances of ccprovider.ChaincodeProvider 31 type ccProviderFactory struct { 32 } 33 34 // NewChaincodeProvider returns pointers to ccProviderImpl as an 35 // implementer of the ccprovider.ChaincodeProvider interface 36 func (c *ccProviderFactory) NewChaincodeProvider() ccprovider.ChaincodeProvider { 37 return &ccProviderImpl{} 38 } 39 40 // init is called when this package is loaded. This implementation registers the factory 41 func init() { 42 ccprovider.RegisterChaincodeProviderFactory(&ccProviderFactory{}) 43 } 44 45 // ccProviderImpl is an implementation of the ccprovider.ChaincodeProvider interface 46 type ccProviderImpl struct { 47 txsim ledger.TxSimulator 48 } 49 50 // ccProviderContextImpl contains the state that is passed around to calls to methods of ccProviderImpl 51 type ccProviderContextImpl struct { 52 ctx *ccprovider.CCContext 53 } 54 55 // GetContext returns a context for the supplied ledger, with the appropriate tx simulator 56 func (c *ccProviderImpl) GetContext(ledger ledger.PeerLedger) (context.Context, error) { 57 var err error 58 // get context for the chaincode execution 59 c.txsim, err = ledger.NewTxSimulator() 60 if err != nil { 61 return nil, err 62 } 63 ctxt := context.WithValue(context.Background(), TXSimulatorKey, c.txsim) 64 return ctxt, nil 65 } 66 67 // GetCCContext returns an interface that encapsulates a 68 // chaincode context; the interface is required to avoid 69 // referencing the chaincode package from the interface definition 70 func (c *ccProviderImpl) GetCCContext(cid, name, version, txid string, syscc bool, signedProp *pb.SignedProposal, prop *pb.Proposal) interface{} { 71 ctx := ccprovider.NewCCContext(cid, name, version, txid, syscc, signedProp, prop) 72 return &ccProviderContextImpl{ctx: ctx} 73 } 74 75 // GetCCValidationInfoFromLCCC returns the VSCC and the policy listed in LCCC for the supplied chaincode 76 func (c *ccProviderImpl) GetCCValidationInfoFromLCCC(ctxt context.Context, txid string, signedProp *pb.SignedProposal, prop *pb.Proposal, chainID string, chaincodeID string) (string, []byte, error) { 77 // LCCC does not have any notion about its own 78 // endorsing policy - we should never call this 79 // function with lccc as the chaincodeID 80 if chaincodeID == "lccc" { 81 panic("GetCCValidationInfoFromLCCC invoke for LCCC") 82 } 83 84 data, err := GetChaincodeDataFromLCCC(ctxt, txid, signedProp, prop, chainID, chaincodeID) 85 if err != nil { 86 return "", nil, err 87 } 88 89 if data == nil || data.Vscc == "" || data.Policy == nil { 90 return "", nil, fmt.Errorf("Incorrect validation info in LCCC") 91 } 92 93 return data.Vscc, data.Policy, nil 94 } 95 96 // ExecuteChaincode executes the chaincode specified in the context with the specified arguments 97 func (c *ccProviderImpl) ExecuteChaincode(ctxt context.Context, cccid interface{}, args [][]byte) (*pb.Response, *pb.ChaincodeEvent, error) { 98 return ExecuteChaincode(ctxt, cccid.(*ccProviderContextImpl).ctx, args) 99 } 100 101 // Execute executes the chaincode given context and spec (invocation or deploy) 102 func (c *ccProviderImpl) Execute(ctxt context.Context, cccid interface{}, spec interface{}) (*pb.Response, *pb.ChaincodeEvent, error) { 103 return Execute(ctxt, cccid.(*ccProviderContextImpl).ctx, spec) 104 } 105 106 // ExecuteWithErrorFilder executes the chaincode given context and spec and returns payload 107 func (c *ccProviderImpl) ExecuteWithErrorFilter(ctxt context.Context, cccid interface{}, spec interface{}) ([]byte, *pb.ChaincodeEvent, error) { 108 return ExecuteWithErrorFilter(ctxt, cccid.(*ccProviderContextImpl).ctx, spec) 109 } 110 111 // ExecuteWithErrorFilder executes the chaincode given context and spec and returns payload 112 func (c *ccProviderImpl) Stop(ctxt context.Context, cccid interface{}, spec *pb.ChaincodeDeploymentSpec) error { 113 if theChaincodeSupport != nil { 114 return theChaincodeSupport.Stop(ctxt, cccid.(*ccProviderContextImpl).ctx, spec) 115 } 116 panic("ChaincodeSupport not initialized") 117 } 118 119 // ReleaseContext frees up resources held by the context 120 func (c *ccProviderImpl) ReleaseContext() { 121 c.txsim.Done() 122 }