github.com/matrixorigin/matrixone@v1.2.0/pkg/common/morpc/examples/message/message.go (about)

     1  // Copyright 2021 - 2022 Matrix Origin
     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 message
    16  
    17  import (
    18  	"github.com/fagongzi/goetty/v2/buf"
    19  )
    20  
    21  // ExampleMessage example message
    22  type ExampleMessage struct {
    23  	MsgID   uint64
    24  	Content string
    25  }
    26  
    27  func (tm *ExampleMessage) GetID() uint64 {
    28  	return tm.MsgID
    29  }
    30  
    31  func (tm *ExampleMessage) SetID(id uint64) {
    32  	tm.MsgID = id
    33  }
    34  
    35  func (tm *ExampleMessage) DebugString() string {
    36  	return ""
    37  }
    38  
    39  func (tm *ExampleMessage) Size() int {
    40  	return 4 + 8 + len(tm.Content)
    41  }
    42  
    43  func (tm *ExampleMessage) MarshalTo(data []byte) (int, error) {
    44  	offset := 0
    45  
    46  	buf.Uint64ToBytesTo(tm.MsgID, data[offset:])
    47  	offset += 8
    48  
    49  	buf.Int2BytesTo(len(tm.Content), data[offset:])
    50  	offset += 4
    51  
    52  	if len(tm.Content) > 0 {
    53  		copy(data[offset:], []byte(tm.Content))
    54  	}
    55  
    56  	return len(data), nil
    57  }
    58  
    59  func (tm *ExampleMessage) Unmarshal(data []byte) error {
    60  	offset := 0
    61  
    62  	tm.MsgID = buf.Byte2Uint64(data)
    63  	offset += 8
    64  
    65  	n := buf.Byte2Int(data[offset:])
    66  	offset += 4
    67  
    68  	content := make([]byte, n)
    69  	if n > 0 {
    70  		copy(content, data[offset:offset+n])
    71  	}
    72  	tm.Content = string(content)
    73  
    74  	return nil
    75  }