willdot.net
An experimental pub/sub client and server project.
Error handling
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server/message_store.go
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server/message_store.go
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"sync"
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)
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// Memory store allows messages to be stored in memory
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type MemoryStore struct {
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mu sync.Mutex
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msgs map[int]message
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offset int
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}
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// New memory store initializes a new in memory store
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func NewMemoryStore() *MemoryStore {
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return &MemoryStore{
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msgs: make(map[int]message),
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}
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}
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+
// Write will write the provided message to the in memory store
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func (m *MemoryStore) Write(msg message) error {
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m.mu.Lock()
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defer m.mu.Unlock()
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return nil
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}
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+
// ReadFrom will read messages from (and including) the provided offset and pass them to the provided handler
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func (m *MemoryStore) ReadFrom(offset int, handleFunc func(msg message)) error {
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if offset < 0 || offset > m.offset {
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return fmt.Errorf("invalid offset provided")