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Diffstat (limited to 'swarm/storage/mru/cacheentry.go')
-rw-r--r-- | swarm/storage/mru/cacheentry.go | 48 |
1 files changed, 48 insertions, 0 deletions
diff --git a/swarm/storage/mru/cacheentry.go b/swarm/storage/mru/cacheentry.go new file mode 100644 index 000000000..280331f77 --- /dev/null +++ b/swarm/storage/mru/cacheentry.go @@ -0,0 +1,48 @@ +// Copyright 2018 The go-ethereum Authors +// This file is part of the go-ethereum library. +// +// The go-ethereum library is free software: you can redistribute it and/or modify +// it under the terms of the GNU Lesser General Public License as published by +// the Free Software Foundation, either version 3 of the License, or +// (at your option) any later version. +// +// The go-ethereum library is distributed in the hope that it will be useful, +// but WITHOUT ANY WARRANTY; without even the implied warranty of +// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the +// GNU Lesser General Public License for more details. +// +// You should have received a copy of the GNU Lesser General Public License +// along with the go-ethereum library. If not, see <http://www.gnu.org/licenses/>. + +package mru + +import ( + "bytes" + "context" + "time" + + "github.com/ethereum/go-ethereum/swarm/storage" +) + +const ( + hasherCount = 8 + resourceHashAlgorithm = storage.SHA3Hash + defaultRetrieveTimeout = 100 * time.Millisecond +) + +// cacheEntry caches resource data and the metadata of its root chunk. +type cacheEntry struct { + ResourceUpdate + *bytes.Reader + lastKey storage.Address +} + +// implements storage.LazySectionReader +func (r *cacheEntry) Size(ctx context.Context, _ chan bool) (int64, error) { + return int64(len(r.ResourceUpdate.data)), nil +} + +//returns the resource's topic +func (r *cacheEntry) Topic() Topic { + return r.View.Topic +} |