12622512440

Committed 05 Jan 2025 07:58PM UTC coverage: 27.495% (-39.9%) from 67.361%

Build # 12622512440

Build Type

Pull #419

github

Committed by

web-flow

Commit Message

Merge b3c17d928 into ac3a97277

Pull Request Pull Request #419: fix(ci): update to up/download-artifact v4

Run Details

1769 of 6434 relevant lines covered (27.49%)

1.41 hits per line

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0.0

/commandhandler/bus/commandhandler.go

// Copyright (c) 2014 - The Event Horizon authors.
//
// Licensed 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 bus

import (
        "context"
        "errors"
        "sync"

        eh "github.com/looplab/eventhorizon"
)

var (
        // ErrHandlerAlreadySet is when a handler is already registered for a command.
        ErrHandlerAlreadySet = errors.New("handler is already set")
        // ErrHandlerNotFound is when no handler can be found.
        ErrHandlerNotFound = errors.New("no handlers for command")
)

// CommandHandler is a command handler that handles commands by routing to the
// registered CommandHandlers.
type CommandHandler struct {
        handlers   map[eh.CommandType]eh.CommandHandler
        handlersMu sync.RWMutex
}

// NewCommandHandler creates a CommandHandler.
func NewCommandHandler() *CommandHandler {
        return &CommandHandler{
                handlers: make(map[eh.CommandType]eh.CommandHandler),
        }
}

// HandleCommand handles a command with a handler capable of handling it.
func (h *CommandHandler) HandleCommand(ctx context.Context, cmd eh.Command) error {
        select {
        case <-ctx.Done():
                return ctx.Err()
        default:
        }

        if err := eh.CheckCommand(cmd); err != nil {
                return err
        }

        h.handlersMu.RLock()
        defer h.handlersMu.RUnlock()

        if handler, ok := h.handlers[cmd.CommandType()]; ok {
                return handler.HandleCommand(ctx, cmd)
        }

        return ErrHandlerNotFound
}

// SetHandler adds a handler for a specific command.
func (h *CommandHandler) SetHandler(handler eh.CommandHandler, cmdType eh.CommandType) error {
        h.handlersMu.Lock()
        defer h.handlersMu.Unlock()

        if _, ok := h.handlers[cmdType]; ok {
                return ErrHandlerAlreadySet
        }

        h.handlers[cmdType] = handler

        return nil
}

1	// Copyright (c) 2014 - The Event Horizon authors.
2	//
3	// Licensed under the Apache License, Version 2.0 (the "License");
4	// you may not use this file except in compliance with the License.
5	// You may obtain a copy of the License at
6	//
7	// http://www.apache.org/licenses/LICENSE-2.0
8	//
9	// Unless required by applicable law or agreed to in writing, software
10	// distributed under the License is distributed on an "AS IS" BASIS,
11	// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
12	// See the License for the specific language governing permissions and
13	// limitations under the License.
14
15	package bus
16
17	import (
18	"context"
19	"errors"
20	"sync"
21
22	eh "github.com/looplab/eventhorizon"
23	)
24
25	var (
26	// ErrHandlerAlreadySet is when a handler is already registered for a command.
27	ErrHandlerAlreadySet = errors.New("handler is already set")
28	// ErrHandlerNotFound is when no handler can be found.
29	ErrHandlerNotFound = errors.New("no handlers for command")
30	)
31
32	// CommandHandler is a command handler that handles commands by routing to the
33	// registered CommandHandlers.
34	type CommandHandler struct {
35	handlers map[eh.CommandType]eh.CommandHandler
36	handlersMu sync.RWMutex
37	}
38
39	// NewCommandHandler creates a CommandHandler.
40	func NewCommandHandler() *CommandHandler {	×
41	return &CommandHandler{	×
42	handlers: make(map[eh.CommandType]eh.CommandHandler),	×
43	}	×
44	}	×
45
46	// HandleCommand handles a command with a handler capable of handling it.
47	func (h *CommandHandler) HandleCommand(ctx context.Context, cmd eh.Command) error {	×
48	select {	×
49	case <-ctx.Done():	×
50	return ctx.Err()	×
51	default:	×
52	}
53
54	if err := eh.CheckCommand(cmd); err != nil {	×
55	return err	×
56	}	×
57
58	h.handlersMu.RLock()	×
59	defer h.handlersMu.RUnlock()	×
60		×
61	if handler, ok := h.handlers[cmd.CommandType()]; ok {	×
62	return handler.HandleCommand(ctx, cmd)	×
63	}	×
64
65	return ErrHandlerNotFound	×
66	}
67
68	// SetHandler adds a handler for a specific command.
69	func (h *CommandHandler) SetHandler(handler eh.CommandHandler, cmdType eh.CommandType) error {	×
70	h.handlersMu.Lock()	×
71	defer h.handlersMu.Unlock()	×
72		×
73	if _, ok := h.handlers[cmdType]; ok {	×
74	return ErrHandlerAlreadySet	×
75	}	×
76
77	h.handlers[cmdType] = handler	×
78		×
79	return nil	×
80	}

looplab / eventhorizon / 12622512440

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