open-match.dev/open-match@v1.8.1/examples/scale/scenarios/firstmatch/firstmatch.go (about)

     1  // Copyright 2019 Google LLC
     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  package firstmatch
    16  
    17  import (
    18  	"fmt"
    19  	"io"
    20  	"time"
    21  
    22  	"open-match.dev/open-match/pkg/pb"
    23  )
    24  
    25  const (
    26  	poolName = "all"
    27  )
    28  
    29  func Scenario() *FirstMatchScenario {
    30  	return &FirstMatchScenario{}
    31  }
    32  
    33  type FirstMatchScenario struct {
    34  }
    35  
    36  func (*FirstMatchScenario) Profiles() []*pb.MatchProfile {
    37  	return []*pb.MatchProfile{
    38  		{
    39  			Name: "entirePool",
    40  			Pools: []*pb.Pool{
    41  				{
    42  					Name: poolName,
    43  				},
    44  			},
    45  		},
    46  	}
    47  }
    48  
    49  func (*FirstMatchScenario) Ticket() *pb.Ticket {
    50  	return &pb.Ticket{}
    51  }
    52  
    53  func (*FirstMatchScenario) Backfill() *pb.Backfill {
    54  	return nil
    55  }
    56  
    57  func (*FirstMatchScenario) MatchFunction(p *pb.MatchProfile, poolBackfills map[string][]*pb.Backfill, poolTickets map[string][]*pb.Ticket) ([]*pb.Match, error) {
    58  	tickets := poolTickets[poolName]
    59  	var matches []*pb.Match
    60  
    61  	for i := 0; i+1 < len(tickets); i += 2 {
    62  		matches = append(matches, &pb.Match{
    63  			MatchId:       fmt.Sprintf("profile-%v-time-%v-%v", p.GetName(), time.Now().Format("2006-01-02T15:04:05.00"), len(matches)),
    64  			Tickets:       []*pb.Ticket{tickets[i], tickets[i+1]},
    65  			MatchProfile:  p.GetName(),
    66  			MatchFunction: "rangeExpandingMatchFunction",
    67  		})
    68  	}
    69  
    70  	return matches, nil
    71  }
    72  
    73  // fifoEvaluate accepts all matches which don't contain the same ticket as in a
    74  // previously accepted match.  Essentially first to claim the ticket wins.
    75  func (*FirstMatchScenario) Evaluate(stream pb.Evaluator_EvaluateServer) error {
    76  	used := map[string]struct{}{}
    77  
    78  	// TODO: once the evaluator client supports sending and receiving at the
    79  	// same time, don't buffer, just send results immediately.
    80  	matchIDs := []string{}
    81  
    82  outer:
    83  	for {
    84  		req, err := stream.Recv()
    85  		if err == io.EOF {
    86  			break
    87  		}
    88  		if err != nil {
    89  			return fmt.Errorf("Error reading evaluator input stream: %w", err)
    90  		}
    91  
    92  		m := req.GetMatch()
    93  
    94  		for _, t := range m.Tickets {
    95  			if _, ok := used[t.Id]; ok {
    96  				continue outer
    97  			}
    98  		}
    99  
   100  		for _, t := range m.Tickets {
   101  			used[t.Id] = struct{}{}
   102  		}
   103  
   104  		matchIDs = append(matchIDs, m.GetMatchId())
   105  	}
   106  
   107  	for _, mID := range matchIDs {
   108  		err := stream.Send(&pb.EvaluateResponse{MatchId: mID})
   109  		if err != nil {
   110  			return fmt.Errorf("Error sending evaluator output stream: %w", err)
   111  		}
   112  	}
   113  
   114  	return nil
   115  }