69 lines
1.8 KiB
Go
69 lines
1.8 KiB
Go
/*
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Copyright IBM Corp. 2017 All Rights Reserved.
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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*/
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package ccprovider
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import (
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"fmt"
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"sync"
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)
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// ccInfoCacheImpl implements in-memory cache for ChaincodeData
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// needed by endorser to verify if the local instantiation policy
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// matches the instantiation policy on a channel before honoring
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// an invoke
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type ccInfoCacheImpl struct {
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sync.RWMutex
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cache map[string]*ChaincodeData
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cacheSupport CCCacheSupport
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}
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// NewCCInfoCache returns a new cache on top of the supplied CCInfoProvider instance
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func NewCCInfoCache(cs CCCacheSupport) *ccInfoCacheImpl {
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return &ccInfoCacheImpl{
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cache: make(map[string]*ChaincodeData),
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cacheSupport: cs,
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}
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}
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func (c *ccInfoCacheImpl) GetChaincodeData(ccNameVersion string) (*ChaincodeData, error) {
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// c.cache is guaranteed to be non-nil
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c.RLock()
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ccdata, in := c.cache[ccNameVersion]
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c.RUnlock()
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if !in {
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var err error
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// the chaincode data is not in the cache
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// try to look it up from the file system
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ccpack, err := c.cacheSupport.GetChaincode(ccNameVersion)
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if err != nil || ccpack == nil {
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return nil, fmt.Errorf("cannot retrieve package for chaincode %ss, error %s", ccNameVersion, err)
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}
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// we have a non-nil ChaincodeData, put it in the cache
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c.Lock()
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ccdata = ccpack.GetChaincodeData()
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c.cache[ccNameVersion] = ccdata
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c.Unlock()
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}
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return ccdata, nil
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}
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