Chaincode examples for Java

1. HelloJavaChaincode: simplest Hello World java chaincode

• copy the gradle files and the scr files apart from test to the chaincode/01_HelloJavaChaincode directory
• start a Hyperledger Fabric network (like fabric-samples/basic-network): pay attention if the cli drive mappings are valid
• run on the cli container
  docker exec -it cli /bin/bash
• install chaincode
  peer chaincode install -l java -n mycc -v v1 -p /opt/gopath/src/github.com/01_HelloJavaChaincode
• initiate chaincode
  peer chaincode instantiate -o orderer.example.com:7050 -C mychannel -n mycc -v v1 -c ‘{“Args”:[“init”,”HelloWorld”]}’ -P ‘OR (“Org1MSP.member”)’
• query hello world message
  peer chaincode query -C mychannel -n mycc -c ‘{“Args”:[“getHelloWorld”]}’
• change the hello world message
  peer chaincode invoke -o orderer.example.com:7050 —cafile /opt/gopath/src/github.com/hyperledger/fabric/peer/crypto/ordererOrganizations/example.com/orderers/orderer.example.com/msp/tlscacerts/tlsca.example.com-cert.pem -C mychannel -n mycc —peerAddresses peer0.org1.example.com:7051 —tlsRootCertFiles /opt/gopath/src/github.com/hyperledger/fabric/peer/crypto/peerOrganizations/org1.example.com/peers/peer0.org1.example.com/tls/ca.crt -c ‘{“Args”:[“setHelloWorldMessage”, “HalloWelt”]}’
• query the changed hello world message

1. JavaChaincodeAsset: administrating a house on the blockchain

• copy the gradle files and the scr files apart from test to the chaincode/02_JavaChaincodeAsset directory
• start a Hyperledger Fabric network (like fabric-samples/basic-network): pay attention if the cli drive mappings are valid
• run on the cli container
  docker exec -it cli /bin/bash
• install chaincode
  peer chaincode install -l java -n mycc -v v1 -p /opt/gopath/src/github.com/02_JavaChaincodeAsset
• initiate chaincode
  peer chaincode instantiate -o orderer.example.com:7050 -C mychannel -n mycc -v v1 -c ‘{“Args”:[]}’ -P ‘OR (“Org1MSP.member”)’
• create new house
  peer chaincode invoke -o orderer.example.com:7050 —cafile /opt/gopath/src/github.com/hyperledger/fabric/peer/crypto/ordererOrganizations/example.com/orderers/orderer.example.com/msp/tlscacerts/tlsca.example.com-cert.pem -C mychannel -n mycc —peerAddresses peer0.org1.example.com:7051 —tlsRootCertFiles /opt/gopath/src/github.com/hyperledger/fabric/peer/crypto/peerOrganizations/org1.example.com/peers/peer0.org1.example.com/tls/ca.crt -c ‘{“Args”:[“setHouse”,”houseID123”,”2”,”testCountry”,”testCity”,”testStreet”,”4”]}’
• read the house
  peer chaincode query -C mychannel -n mycc -c ‘{“Args”:[“getHouse”,”houseID123”]}’
• update the number of rooms for the house
  peer chaincode invoke -o orderer.example.com:7050 —cafile /opt/gopath/src/github.com/hyperledger/fabric/peer/crypto/ordererOrganizations/example.com/orderers/orderer.example.com/msp/tlscacerts/tlsca.example.com-cert.pem -C mychannel -n mycc —peerAddresses peer0.org1.example.com:7051 —tlsRootCertFiles /opt/gopath/src/github.com/hyperledger/fabric/peer/crypto/peerOrganizations/org1.example.com/peers/peer0.org1.example.com/tls/ca.crt -c ‘{“Args”:[“buildNewRoom”,”houseID123”,”4”]}’
• read the modfied house
  peer chaincode query -C mychannel -n mycc -c ‘{“Args”:[“getHouse”,”houseID123”]}’

1. AssetWithAccess: administrating a house on the blockchain with access rights