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model.go
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model.go
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// Copyright (c) 2017 Uber Technologies, Inc.
//
// 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 dependencystore
import (
"fmt"
"github.com/gocql/gocql"
)
// Dependency is the UDT representation of a Jaeger Dependency.
type Dependency struct {
Parent string `cql:"parent"`
Child string `cql:"child"`
CallCount int64 `cql:"call_count"` // always unsigned, but we cannot explicitly read uint64 from Cassandra
Source string `cql:"source"`
}
// MarshalUDT handles marshalling a Dependency.
func (d *Dependency) MarshalUDT(name string, info gocql.TypeInfo) ([]byte, error) {
switch name {
case "parent":
return gocql.Marshal(info, d.Parent)
case "child":
return gocql.Marshal(info, d.Child)
case "call_count":
return gocql.Marshal(info, d.CallCount)
case "source":
return gocql.Marshal(info, d.Source)
default:
return nil, fmt.Errorf("unknown column for position: %q", name)
}
}
// UnmarshalUDT handles unmarshalling a Dependency.
func (d *Dependency) UnmarshalUDT(name string, info gocql.TypeInfo, data []byte) error {
switch name {
case "parent":
return gocql.Unmarshal(info, data, &d.Parent)
case "child":
return gocql.Unmarshal(info, data, &d.Child)
case "call_count":
return gocql.Unmarshal(info, data, &d.CallCount)
case "source":
return gocql.Unmarshal(info, data, &d.Source)
default:
return fmt.Errorf("unknown column for position: %q", name)
}
}