| // Licensed to the Apache Software Foundation (ASF) under one or more |
| // contributor license agreements. See the NOTICE file distributed with |
| // this work for additional information regarding copyright ownership. |
| // The ASF licenses this file to You under the Apache License, Version 2.0 |
| // (the "License"); you may not use this file except in compliance with |
| // the License. You may obtain a copy of the License at |
| // |
| // http://www.apache.org/licenses/LICENSE-2.0 |
| // |
| // Unless required by applicable law or agreed to in writing, software |
| // distributed under the License is distributed on an "AS IS" BASIS, |
| // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| // See the License for the specific language governing permissions and |
| // limitations under the License. |
| |
| package storagemem |
| |
| import ( |
| "bytes" |
| "fmt" |
| ) |
| |
| import ( |
| "github.com/apache/dubbo-kubernetes/pkg/bufman/pkg/storage" |
| "github.com/apache/dubbo-kubernetes/pkg/bufman/pkg/storage/storagemem/internal" |
| ) |
| |
| type writeObjectCloser struct { |
| bucket *bucket |
| path string |
| externalPath string |
| buffer *bytes.Buffer |
| closed bool |
| } |
| |
| func newWriteObjectCloser( |
| bucket *bucket, |
| path string, |
| ) *writeObjectCloser { |
| return &writeObjectCloser{ |
| bucket: bucket, |
| path: path, |
| buffer: bytes.NewBuffer(nil), |
| } |
| } |
| |
| func (w *writeObjectCloser) Write(p []byte) (int, error) { |
| if w.closed { |
| return 0, storage.ErrClosed |
| } |
| return w.buffer.Write(p) |
| } |
| |
| func (w *writeObjectCloser) SetExternalPath(externalPath string) error { |
| if w.externalPath != "" { |
| return fmt.Errorf("external path already set: %q", w.externalPath) |
| } |
| w.externalPath = externalPath |
| return nil |
| } |
| |
| func (w *writeObjectCloser) Close() error { |
| if w.closed { |
| return storage.ErrClosed |
| } |
| w.closed = true |
| // overwrites anything existing |
| // this is the same behavior as storageos |
| w.bucket.lock.Lock() |
| defer w.bucket.lock.Unlock() |
| // Note that if there is an existing reader for an object of the same path, |
| // that reader will continue to read the original file, but we accept this |
| // as no less consistent than os mechanics. |
| w.bucket.pathToImmutableObject[w.path] = internal.NewImmutableObject( |
| w.path, |
| w.externalPath, |
| w.buffer.Bytes(), |
| ) |
| return nil |
| } |