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namespaced_manager.go
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namespaced_manager.go
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// Copyright (c) 2018 Ashley Jeffs
//
// Permission is hereby granted, free of charge, to any person obtaining a copy
// of this software and associated documentation files (the "Software"), to deal
// in the Software without restriction, including without limitation the rights
// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
// copies of the Software, and to permit persons to whom the Software is
// furnished to do so, subject to the following conditions:
//
// The above copyright notice and this permission notice shall be included in
// all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
// THE SOFTWARE.
package manager
import (
"errors"
"net/http"
"path"
"github.com/Jeffail/benthos/v3/lib/types"
)
//------------------------------------------------------------------------------
// NamespacedManager is a types.Manager implementation that wraps an underlying
// implementation with a namespace that prefixes registered endpoints, etc.
type NamespacedManager struct {
ns string
mgr types.Manager
}
func namespacedMgr(ns string, mgr types.Manager) *NamespacedManager {
return &NamespacedManager{
ns: "/" + ns,
mgr: mgr,
}
}
// RegisterEndpoint registers a server wide HTTP endpoint.
func (n *NamespacedManager) RegisterEndpoint(p, desc string, h http.HandlerFunc) {
n.mgr.RegisterEndpoint(path.Join(n.ns, p), desc, h)
}
// GetCache attempts to find a service wide cache by its name.
func (n *NamespacedManager) GetCache(name string) (types.Cache, error) {
return n.mgr.GetCache(name)
}
// GetCondition attempts to find a service wide condition by its name.
func (n *NamespacedManager) GetCondition(name string) (types.Condition, error) {
return n.mgr.GetCondition(name)
}
// GetProcessor attempts to find a service wide processor by its name.
func (n *NamespacedManager) GetProcessor(name string) (types.Processor, error) {
// TODO: V4 Simplify this.
if procProv, ok := n.mgr.(interface {
GetProcessor(name string) (types.Processor, error)
}); ok {
return procProv.GetProcessor(name)
}
return nil, errors.New("wrapped manager does not support processor resources")
}
// GetRateLimit attempts to find a service wide rate limit by its name.
func (n *NamespacedManager) GetRateLimit(name string) (types.RateLimit, error) {
return n.mgr.GetRateLimit(name)
}
// GetPlugin attempts to find a service wide resource plugin by its name.
func (n *NamespacedManager) GetPlugin(name string) (interface{}, error) {
return n.mgr.GetPlugin(name)
}
// GetPipe returns a named pipe transaction channel.
func (n *NamespacedManager) GetPipe(name string) (<-chan types.Transaction, error) {
// Pipes are always absolute.
return n.mgr.GetPipe(name)
}
// SetPipe sets a named pipe.
func (n *NamespacedManager) SetPipe(name string, t <-chan types.Transaction) {
// Pipes are always absolute.
n.mgr.SetPipe(name, t)
}
// UnsetPipe unsets a named pipe.
func (n *NamespacedManager) UnsetPipe(name string, t <-chan types.Transaction) {
// Pipes are always absolute.
n.mgr.UnsetPipe(name, t)
}
// GetUnderlying returns the underlying types.Manager implementation.
func (n *NamespacedManager) GetUnderlying() types.Manager {
return n.mgr
}
//------------------------------------------------------------------------------