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pongAgent.go
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/
pongAgent.go
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// Copyright (C) 2016 Christophe Camel, Jonathan Pigrée
// 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 main
import (
"encoding/json"
"fmt"
"io/ioutil"
"net/http"
"github.com/crucibuild/agent-pong/schema"
"github.com/crucibuild/sdk-agent-go/agentiface"
"github.com/crucibuild/sdk-agent-go/agentimpl"
)
// Resources represents an handler on the various data files
// Used by the agent(avro files, manifest, etc...).
var Resources http.FileSystem
// PongAgent is an implementation over the Agent implementation
// available in sdk-agent-go.
type PongAgent struct {
*agentimpl.Agent
}
func mustOpenResources(path string) []byte {
file, err := Resources.Open(path)
if err != nil {
panic(err)
}
content, err := ioutil.ReadAll(file)
if err != nil {
panic(err)
}
return content
}
// NewPongAgent creates a new instance of PongAgent.
func NewPongAgent() (agentiface.Agent, error) {
var agentSpec map[string]interface{}
manifest := mustOpenResources("/resources/manifest.json")
err := json.Unmarshal(manifest, &agentSpec)
if err != nil {
return nil, err
}
impl, err := agentimpl.NewAgent(agentimpl.NewManifest(agentSpec))
if err != nil {
return nil, err
}
agent := &PongAgent{
impl,
}
if err := agent.init(); err != nil {
return nil, err
}
return agent, nil
}
func (a *PongAgent) register(rawAvroSchema string) error {
s, err := agentimpl.LoadAvroSchema(rawAvroSchema, a)
if err != nil {
return err
}
_, err = a.SchemaRegister(s)
return err
}
func (a *PongAgent) init() error {
// register schemas:
var content = mustOpenResources("/schema/header.avro")
if err := a.register(string(content[:])); err != nil {
return err
}
content = mustOpenResources("/schema/test-command.avro")
if err := a.register(string(content[:])); err != nil {
return err
}
content = mustOpenResources("/schema/tested-event.avro")
if err := a.register(string(content[:])); err != nil {
return err
}
// register types
// register types
if _, err := a.TypeRegister(agentimpl.NewTypeFromType("crucibuild/agent-pong#tested-event", schema.TestedEventType)); err != nil {
return err
}
if _, err := a.TypeRegister(agentimpl.NewTypeFromType("crucibuild/agent-pong#test-command", schema.TestCommandType)); err != nil {
return err
}
// register state callback
a.RegisterStateCallback(a.onStateChange)
return nil
}
func (a *PongAgent) onStateChange(state agentiface.State) error {
switch state {
case agentiface.StateConnected:
if _, err := a.RegisterCommandCallback("crucibuild/agent-pong#test-command", a.onTestCommand); err != nil {
return err
}
}
return nil
}
func (a *PongAgent) onTestCommand(ctx agentiface.CommandCtx) error {
cmd := ctx.Message().(*schema.TestCommand)
a.Info(fmt.Sprintf("Received test-command: '%s' '%s' '%d' ", cmd.Foo.Z, cmd.Value, cmd.X))
// reply with a tested event
return ctx.SendEvent(&schema.TestedEvent{Value: "pong"})
}