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capabilities.go
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/
capabilities.go
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/*
Copyright IBM Corp. All Rights Reserved.
SPDX-License-Identifier: Apache-2.0
*/
package capabilities
import (
"github.com/hyperledger/fabric/common/flogging"
cb "github.com/hyperledger/fabric/protos/common"
"github.com/pkg/errors"
)
var logger = flogging.MustGetLogger("common.capabilities")
// provider is the 'plugin' parameter for registry.
type provider interface {
// HasCapability should report whether the binary supports this capability.
HasCapability(capability string) bool
// Type is used to make error messages more legible.
Type() string
}
// registry is a common structure intended to be used to support specific aspects of capabilities
// such as orderer, application, and channel.
type registry struct {
provider provider
capabilities map[string]*cb.Capability
}
func newRegistry(p provider, capabilities map[string]*cb.Capability) *registry {
return ®istry{
provider: p,
capabilities: capabilities,
}
}
// Supported checks that all of the required capabilities are supported by this binary.
func (r *registry) Supported() error {
for capabilityName := range r.capabilities {
if r.provider.HasCapability(capabilityName) {
logger.Debugf("%s capability %s is supported and is enabled", r.provider.Type(), capabilityName)
continue
}
return errors.Errorf("%s capability %s is required but not supported", r.provider.Type(), capabilityName)
}
return nil
}