Baguette/dodb.cr
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Index: change get_key to either walk the FS or the cached db index.

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This commit is contained in:
Philippe PITTOLI 2024-05-07 14:53:03 +02:00
parent bb6d9a26f7
commit 401578c77d
1 changed files with 15 additions and 9 deletions
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24
src/dodb/index.cr
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@ -60,8 +60,14 @@ class DODB::Index(V) < DODB::Indexer(V)
end
end
# Get the key (ex: 343) for an entry in the DB.
# Without caching, it translates to walk the file-system in `db/indices/by_#{name}/<index>`.
def get_key(index : String) : Int32
get_key_on_fs index
end
def get(index : String) : V
@storage[get_key_on_fs index]
@storage[get_key index]
end
def get?(index : String) : V?
@ -73,7 +79,7 @@ class DODB::Index(V) < DODB::Indexer(V)
# FIXME: Unlock on exception.
def safe_get(index : String) : Nil
@storage.request_lock @name, index
internal_key = get_key_on_fs(index).to_s
internal_key = get_key(index).to_s
@storage.request_lock internal_key
yield get index
@ -97,7 +103,7 @@ class DODB::Index(V) < DODB::Indexer(V)
end
def get_with_key(index : String) : Tuple(V, Int32)
key = get_key_on_fs index
key = get_key index
value = @storage[key]
@ -114,7 +120,7 @@ class DODB::Index(V) < DODB::Indexer(V)
end
def update(index : String, new_value : V)
key = get_key_on_fs index
key = get_key index
@storage[key] = new_value
end
@ -126,7 +132,7 @@ class DODB::Index(V) < DODB::Indexer(V)
end
def delete(index : String)
key = get_key_on_fs index
key = get_key index
@storage.delete key
end
@ -181,9 +187,10 @@ class DODB::CachedIndex(V) < DODB::Index(V)
@data.delete index_key
end
def get(index : String) : V
# Get the key from the database representation on the file-system.
key = if k = @data[index]?
# Get the key (ex: 343) for an entry in the DB.
# With caching, the key is probably stored in a hash, or we'll search in the FS.
def get_key(index : String) : Int32
if k = @data[index]?
k
elsif k = get_key_on_fs(index)
@data[index] = k
@ -191,6 +198,5 @@ class DODB::CachedIndex(V) < DODB::Index(V)
else
raise MissingEntry.new(@name, index)
end
@storage[key]
end
end