github.com/adnan-c/fabric_e2e_couchdb@v0.6.1-preview.0.20170228180935-21ce6b23cf91/orderer/kafka/chain_partition.go (about) 1 /* 2 Copyright IBM Corp. 2016 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 kafka 18 19 import "fmt" 20 21 const rawPartition = 0 22 23 // ChainPartition identifies the Kafka partition the orderer interacts with. 24 type ChainPartition interface { 25 Topic() string 26 Partition() int32 27 fmt.Stringer 28 } 29 30 type chainPartitionImpl struct { 31 tpc string 32 prt int32 33 } 34 35 // Returns a new chain partition for a given chain ID and partition. 36 func newChainPartition(chainID string, partition int32) ChainPartition { 37 return &chainPartitionImpl{ 38 // TODO https://github.com/apache/kafka/blob/trunk/core/src/main/scala/kafka/common/Topic.scala#L29 39 tpc: fmt.Sprintf("%x", chainID), 40 prt: partition, 41 } 42 } 43 44 // Topic returns the Kafka topic of this chain partition. 45 func (cp *chainPartitionImpl) Topic() string { 46 return cp.tpc 47 } 48 49 // Partition returns the Kafka partition of this chain partition. 50 func (cp *chainPartitionImpl) Partition() int32 { 51 return cp.prt 52 } 53 54 // String returns a string identifying the chain partition. 55 func (cp *chainPartitionImpl) String() string { 56 return fmt.Sprintf("%s/%d", cp.tpc, cp.prt) 57 }