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132
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1 /*******************************************************************************
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2
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3 copyright: Copyright (c) 2004 Kris Bell. All rights reserved
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4
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5 license: BSD style: $(LICENSE)
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6
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7 version: July 2004: Initial release
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8
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9 author: Kris
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10
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11 *******************************************************************************/
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12
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13 module tango.net.cluster.model.IMessage;
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14
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15 public import tango.time.Time;
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16
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17 public import tango.io.protocol.model.IReader,
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18 tango.io.protocol.model.IWriter;
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19
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20 /*******************************************************************************
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21
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22 *******************************************************************************/
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23
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24 interface IMessage : IReadable, IWritable
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25 {
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26 /***********************************************************************
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27
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28 ***********************************************************************/
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29
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30 char[] toString ();
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31
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32 /***********************************************************************
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33
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34 ***********************************************************************/
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35
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36 IMessage clone ();
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37
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38 /***********************************************************************
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39
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40 ***********************************************************************/
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41
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42 void reply (char[] channel);
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43
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44 /***********************************************************************
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45
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46 ***********************************************************************/
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47
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48 char[] reply ();
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49
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50 /***********************************************************************
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51
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52 ***********************************************************************/
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53
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54 void time (Time value);
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55
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56 /***********************************************************************
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57
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58 ***********************************************************************/
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59
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60 Time time ();
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61
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62 /***********************************************************************
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63
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64 ***********************************************************************/
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65
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66 void id (uint value);
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67
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68 /***********************************************************************
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69
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70 ***********************************************************************/
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71
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72 uint id ();
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73
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74 /***********************************************************************
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75
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76 ***********************************************************************/
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77
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78 void execute ();
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79 }
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80
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81
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82 /******************************************************************************
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83
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84 Manages the lifespan of an ICache entry. These loaders effectively
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85 isolate the cache from whence the content is derived. It's a good
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86 idea to employ this abstraction where appropriate, since it allows
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87 the cache source to change with minimal (if any) impact on client
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88 code.
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89
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90 ******************************************************************************/
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91
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92 interface IMessageLoader
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93 {
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94 /**********************************************************************
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95
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96 Load a cache entry from wherever the content is persisted.
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97 The 'time' argument represents that belonging to a stale
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98 entry, which can be used to optimize the loader operation
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99 (no need to perform a full load where there's already a
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100 newer version in an L2 cache). This 'time' value will be
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101 long.min where was no such stale entry.
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102
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103 **********************************************************************/
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104
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105 IMessage load ();
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106 }
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107
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108
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109
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