mirror of https://github.com/dapr/go-sdk.git
107 lines
2.6 KiB
Go
107 lines
2.6 KiB
Go
/*
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Copyright 2021 The Dapr Authors
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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*/
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package main
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import (
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"context"
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"fmt"
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"time"
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dapr "github.com/dapr/go-sdk/client"
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)
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func main() {
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// just for this demo
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ctx := context.Background()
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json := `{ "message": "hello" }`
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data := []byte(json)
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store := "statestore"
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pubsub := "messages"
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// create the client
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client, err := dapr.NewClient()
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if err != nil {
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panic(err)
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}
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defer client.Close()
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// publish a message to the topic demo
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if err := client.PublishEvent(ctx, pubsub, "demo", data); err != nil {
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panic(err)
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}
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fmt.Println("data published")
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// save state with the key key1
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fmt.Printf("saving data: %s\n", string(data))
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if err := client.SaveState(ctx, store, "key1", data); err != nil {
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panic(err)
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}
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fmt.Println("data saved")
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// get state for key key1
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item, err := client.GetState(ctx, store, "key1")
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if err != nil {
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panic(err)
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}
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fmt.Printf("data retrieved [key:%s etag:%s]: %s\n", item.Key, item.Etag, string(item.Value))
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// save state with options
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item2 := &dapr.SetStateItem{
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Etag: &dapr.ETag{
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Value: "2",
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},
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Key: item.Key,
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Metadata: map[string]string{
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"created-on": time.Now().UTC().String(),
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},
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Value: item.Value,
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Options: &dapr.StateOptions{
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Concurrency: dapr.StateConcurrencyLastWrite,
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Consistency: dapr.StateConsistencyStrong,
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},
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}
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if err := client.SaveBulkState(ctx, store, item2); err != nil {
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panic(err)
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}
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fmt.Println("data item saved")
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// delete state for key key1
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if err := client.DeleteState(ctx, store, "key1"); err != nil {
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panic(err)
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}
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fmt.Println("data deleted")
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// invoke a method called EchoMethod on another dapr enabled service
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content := &dapr.DataContent{
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ContentType: "text/plain",
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Data: []byte("hellow"),
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}
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resp, err := client.InvokeMethodWithContent(ctx, "serving", "echo", "post", content)
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if err != nil {
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panic(err)
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}
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fmt.Printf("service method invoked, response: %s\n", string(resp))
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in := &dapr.InvokeBindingRequest{
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Name: "example-http-binding",
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Operation: "create",
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}
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if err := client.InvokeOutputBinding(ctx, in); err != nil {
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panic(err)
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}
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fmt.Println("output binding invoked")
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fmt.Println("DONE (CTRL+C to Exit)")
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}
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