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     1	/*
     2	Copyright 2014 The Perkeep Authors
     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 azure
    18	
    19	import (
    20		"context"
    21	
    22		"go4.org/syncutil"
    23		"perkeep.org/pkg/blob"
    24	)
    25	
    26	var removeGate = syncutil.NewGate(20) // arbitrary
    27	
    28	func (sto *azureStorage) RemoveBlobs(ctx context.Context, blobs []blob.Ref) error {
    29		if sto.cache != nil {
    30			sto.cache.RemoveBlobs(ctx, blobs)
    31		}
    32		var wg syncutil.Group
    33	
    34		for _, blob := range blobs {
    35			blob := blob
    36			removeGate.Start()
    37			wg.Go(func() error {
    38				defer removeGate.Done()
    39				return sto.azureClient.Delete(ctx, sto.container, blob.String())
    40			})
    41		}
    42		return wg.Err()
    43	}
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