1 | (function() {
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2 | var Tuple, TupleSpace, path;
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3 |
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4 | path = require('path');
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5 |
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6 | Tuple = require(path.join(__dirname, 'tuple'));
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7 |
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8 | module.exports = TupleSpace = (function() {
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9 | function TupleSpace(name) {
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10 | this.name = name != null ? name : 'noname';
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11 | this.tuples = [];
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12 | this.callbacks = [];
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13 | this.__defineGetter__('size', function() {
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14 | return this.tuples.length;
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15 | });
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16 | }
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17 |
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18 | TupleSpace.prototype.write = function(tuple, options) {
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19 | var c, called, i, taked, _i, _j, _ref;
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20 | if (options == null) {
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21 | options = {
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22 | expire: Tuple.DEFAULT.expire
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23 | };
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24 | }
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25 | if (!Tuple.isHash(tuple) && !(tuple instanceof Tuple)) {
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26 | return;
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27 | }
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28 | if (!(tuple instanceof Tuple)) {
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29 | tuple = new Tuple(tuple);
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30 | }
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31 | tuple.expire = typeof options.expire === 'number' && options.expire > 0 ? options.expire : Tuple.DEFAULT.expire;
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32 | tuple.from = options.from;
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33 | called = [];
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34 | taked = false;
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35 | for (i = _i = 0, _ref = this.callbacks.length; 0 <= _ref ? _i < _ref : _i > _ref; i = 0 <= _ref ? ++_i : --_i) {
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36 | c = this.callbacks[i];
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37 | if (c.tuple.match(tuple)) {
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38 | if (c.type === 'take' || c.type === 'read') {
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39 | called.push(i);
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40 | }
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41 | (function(c) {
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42 | return setImmediate(function() {
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43 | return c.callback(null, tuple);
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44 | });
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45 | })(c);
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46 | if (c.type === 'take') {
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47 | taked = true;
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48 | break;
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49 | }
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50 | }
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51 | }
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52 | for (_j = called.length - 1; _j >= 0; _j += -1) {
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53 | i = called[_j];
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54 | this.callbacks.splice(i, 1);
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55 | }
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56 | if (!taked) {
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57 | return this.tuples.push(tuple);
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58 | }
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59 | };
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60 |
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61 | TupleSpace.prototype.create_callback_id = function() {
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62 | return Date.now() - Math.random();
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63 | };
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64 |
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65 | TupleSpace.prototype.read = function(tuple, callback) {
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66 | var i, id, t, _i, _ref;
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67 | if (typeof callback !== 'function') {
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68 | return;
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69 | }
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70 | if (!Tuple.isHash(tuple) && !(tuple instanceof Tuple)) {
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71 | setImmediate(function() {
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72 | return callback('argument_error');
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73 | });
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74 | return null;
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75 | }
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76 | if (!(tuple instanceof Tuple)) {
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77 | tuple = new Tuple(tuple);
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78 | }
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79 | for (i = _i = _ref = this.size - 1; _ref <= 0 ? _i <= 0 : _i >= 0; i = _ref <= 0 ? ++_i : --_i) {
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80 | t = this.tuples[i];
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81 | if (tuple.match(t)) {
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82 | setImmediate(function() {
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83 | return callback(null, t);
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84 | });
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85 | return;
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86 | }
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87 | }
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88 | id = this.create_callback_id();
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89 | this.callbacks.push({
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90 | type: 'read',
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91 | callback: callback,
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92 | tuple: tuple,
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93 | id: id
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94 | });
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95 | return id;
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96 | };
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97 |
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98 | TupleSpace.prototype.take = function(tuple, callback) {
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99 | var i, id, t, _i, _ref;
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100 | if (typeof callback !== 'function') {
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101 | return;
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102 | }
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103 | if (!Tuple.isHash(tuple) && !(tuple instanceof Tuple)) {
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104 | setImmediate(function() {
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105 | return callback('argument_error');
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106 | });
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107 | return null;
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108 | }
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109 | if (!(tuple instanceof Tuple)) {
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110 | tuple = new Tuple(tuple);
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111 | }
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112 | for (i = _i = _ref = this.size - 1; _ref <= 0 ? _i <= 0 : _i >= 0; i = _ref <= 0 ? ++_i : --_i) {
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113 | t = this.tuples[i];
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114 | if (tuple.match(t)) {
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115 | setImmediate(function() {
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116 | return callback(null, t);
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117 | });
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118 | this.tuples.splice(i, 1);
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119 | return;
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120 | }
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121 | }
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122 | id = this.create_callback_id();
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123 | this.callbacks.push({
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124 | type: 'take',
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125 | callback: callback,
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126 | tuple: tuple,
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127 | id: id
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128 | });
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129 | return id;
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130 | };
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131 |
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132 | TupleSpace.prototype.watch = function(tuple, callback) {
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133 | var id;
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134 | if (typeof callback !== 'function') {
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135 | return;
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136 | }
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137 | if (!Tuple.isHash(tuple) && !(tuple(instance(Tuple)))) {
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138 | setImmediate(function() {
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139 | return callback('argument_error');
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140 | });
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141 | return;
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142 | }
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143 | if (!(tuple instanceof Tuple)) {
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144 | tuple = new Tuple(tuple);
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145 | }
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146 | id = this.create_callback_id();
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147 | this.callbacks.unshift({
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148 | id: id,
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149 | type: 'watch',
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150 | tuple: tuple,
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151 | callback: callback
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152 | });
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153 | return id;
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154 | };
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155 |
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156 | TupleSpace.prototype.cancel = function(id) {
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157 | var c, i, _i, _ref;
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158 | if (id == null) {
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159 | return;
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160 | }
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161 | for (i = _i = 0, _ref = this.callbacks.length; 0 <= _ref ? _i < _ref : _i > _ref; i = 0 <= _ref ? ++_i : --_i) {
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162 | c = this.callbacks[i];
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163 | if (id === c.id) {
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164 | setImmediate(function() {
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165 | return c.callback('cancel', null);
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166 | });
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167 | this.callbacks.splice(i, 1);
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168 | return;
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169 | }
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170 | }
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171 | };
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172 |
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173 | TupleSpace.prototype.check_expire = function() {
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174 | var expires, i, _i, _j, _ref;
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175 | expires = [];
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176 | for (i = _i = 0, _ref = this.tuples.length; 0 <= _ref ? _i < _ref : _i > _ref; i = 0 <= _ref ? ++_i : --_i) {
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177 | if (this.tuples[i].expire_at < Date.now() / 1000) {
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178 | expires.push(i);
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179 | }
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180 | }
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181 | for (_j = expires.length - 1; _j >= 0; _j += -1) {
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182 | i = expires[_j];
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183 | this.tuples.splice(i, 1);
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184 | }
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185 | return expires.length;
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186 | };
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187 |
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188 | return TupleSpace;
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189 |
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190 | })();
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191 |
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192 | }).call(this);
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