github.com/cs3org/reva/v2@v2.27.7/pkg/events/example/example.go (about)

     1  // Copyright 2018-2021 CERN
     2  //
     3  // Licensed under the Apache License, Version 2.0 (the "License");
     4  // you may not use this file except in compliance with the License.
     5  // You may obtain a copy of the License at
     6  //
     7  //     http://www.apache.org/licenses/LICENSE-2.0
     8  //
     9  // Unless required by applicable law or agreed to in writing, software
    10  // distributed under the License is distributed on an "AS IS" BASIS,
    11  // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    12  // See the License for the specific language governing permissions and
    13  // limitations under the License.
    14  //
    15  // In applying this license, CERN does not waive the privileges and immunities
    16  // granted to it by virtue of its status as an Intergovernmental Organization
    17  // or submit itself to any jurisdiction.
    18  
    19  package main
    20  
    21  import (
    22  	"log"
    23  	"time"
    24  
    25  	"github.com/cs3org/reva/v2/pkg/events"
    26  	"github.com/cs3org/reva/v2/pkg/events/example/consumer"
    27  	"github.com/cs3org/reva/v2/pkg/events/example/publisher"
    28  	"github.com/cs3org/reva/v2/pkg/events/server"
    29  	"github.com/cs3org/reva/v2/pkg/events/stream"
    30  )
    31  
    32  // Simple example of an event workflow
    33  func main() {
    34  	// start a server
    35  	go Server()
    36  
    37  	time.Sleep(5 * time.Second)
    38  
    39  	// obtain a client
    40  	c := Client()
    41  
    42  	// register a consumer
    43  	go consumer.Example(c)
    44  
    45  	// NOTE: consumer must be registered to get events
    46  	time.Sleep(time.Millisecond)
    47  
    48  	// Publish an event
    49  	publisher.Example(c)
    50  
    51  	// wait for consumer go-routine to print
    52  	time.Sleep(500 * time.Millisecond)
    53  
    54  }
    55  
    56  // Server generates a nats server
    57  func Server() {
    58  	err := server.RunNatsServer(
    59  		server.ClusterID("test-cluster"),
    60  		server.Host("127.0.0.1"),
    61  		server.Port(9233),
    62  	)
    63  	if err != nil {
    64  		log.Fatal(err)
    65  	}
    66  }
    67  
    68  // Client builds a nats client
    69  func Client() events.Stream {
    70  	c, err := stream.NatsFromConfig("name of stream", false, stream.NatsConfig{
    71  		Endpoint: "127.0.0.1:9233",
    72  		Cluster:  "test-cluster",
    73  	})
    74  	if err != nil {
    75  		log.Fatal(err)
    76  	}
    77  	return c
    78  
    79  }