Initial version of Blimp BlobCache.

blimp/common/blob_cache/blob_cache.h

Index: blimp/common/blob_cache/blob_cache.h
diff --git a/blimp/common/blob_cache/blob_cache.h b/blimp/common/blob_cache/blob_cache.h
new file mode 100644
index 0000000000000000000000000000000000000000..6b2c684490df5b6cf72d35faf161953f735ede89
--- /dev/null
+++ b/blimp/common/blob_cache/blob_cache.h
@@ -0,0 +1,39 @@
+// Copyright 2016 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#ifndef BLIMP_COMMON_BLOB_CACHE_BLOB_CACHE_H_
+#define BLIMP_COMMON_BLOB_CACHE_BLOB_CACHE_H_
+
+#include <string>
+#include <vector>
+
+#include "base/memory/ref_counted.h"
+#include "base/memory/scoped_ptr.h"

[Kevin M, 2016/04/13 23:29:52]

Remove

[nyquist, 2016/04/14 19:33:22]

Done.

+#include "blimp/common/blimp_common_export.h"
+
+namespace blimp {
+
+typedef base::RefCountedData<std::vector<uint8_t>> RefCountedVector;

[vmpstr, 2016/04/13 23:48:02]

I prefer "using RefCountedVector = base::RefCountedData<std::vector<uint8_t>>;"
but up to you.

[nyquist, 2016/04/14 19:33:22]

Done.

+
+// An interface for a cache of blobs.
+class BLIMP_COMMON_EXPORT BlobCache {
+ public:
+  virtual ~BlobCache() {}
+
+  // Returns true if there is a cache item |id|.
+  virtual bool Contains(const std::string& id) const = 0;
+
+  // Stores |data| with the identifier |id| in the cache.
+  // Command is ignored if there is already a cache item stored under |id|.
+  virtual void Put(const std::string& id,
+                   scoped_refptr<RefCountedVector> data) = 0;
+
+  // Returns a pointer to the cache item |id|, or nullptr if no cache item
+  // exists under that identifier.
+  virtual scoped_refptr<RefCountedVector> Get(const std::string& id) const = 0;
+};
+
+}  // namespace blimp
+
+#endif  // BLIMP_COMMON_BLOB_CACHE_BLOB_CACHE_H_