beanshelldeciderule.html

用JAVA编写的,在做实验的时候留下来的,本来想删的,但是传上来,大家分享吧

<a name="91" href="#91">91</a>                  <span class="string">"Whether each ToeThread should get its own independent "</span> +
<a name="92" href="#92">92</a>                  <span class="string">"script context, or they should share synchronized access "</span> +
<a name="93" href="#93">93</a>                  <span class="string">"to one context. Default is true, meaning each threads "</span> +
<a name="94" href="#94">94</a>                  <span class="string">"gets its own isolated context."</span>, <strong>true</strong>));
<a name="95" href="#95">95</a>          t.setOverrideable(false);
<a name="96" href="#96">96</a>      }
<a name="97" href="#97">97</a>  
<a name="98" href="#98">98</a>      <strong>public</strong> <strong>synchronized</strong> Object decisionFor(Object object) {
<a name="99" href="#99">99</a>          <em class="comment">// depending on previous configuration, interpreter may </em>
<a name="100" href="#100">100</a>         <em class="comment">// be local to this thread or shared</em>
<a name="101" href="#101">101</a>         Interpreter interpreter = getInterpreter(); 
<a name="102" href="#102">102</a>         <strong>synchronized</strong>(interpreter) {
<a name="103" href="#103">103</a>             <em class="comment">// synchronization is harmless for local thread interpreter,</em>
<a name="104" href="#104">104</a>             <em class="comment">// necessary for shared interpreter</em>
<a name="105" href="#105">105</a>             <strong>try</strong> {
<a name="106" href="#106">106</a>                 interpreter.set(<span class="string">"object"</span>,object);
<a name="107" href="#107">107</a>                 <strong>return</strong> interpreter.eval(<span class="string">"decisionFor(object)"</span>);
<a name="108" href="#108">108</a>             } <strong>catch</strong> (EvalError e) {
<a name="109" href="#109">109</a>                 <em class="comment">// TODO Auto-generated catch block</em>
<a name="110" href="#110">110</a>                 e.printStackTrace();
<a name="111" href="#111">111</a>                 <strong>return</strong> PASS;
<a name="112" href="#112">112</a>             } 
<a name="113" href="#113">113</a>         }
<a name="114" href="#114">114</a>     }
<a name="115" href="#115">115</a> 
<a name="116" href="#116">116</a>     <em>/**<em>*</em></em>
<a name="117" href="#117">117</a> <em>     * Get the proper Interpreter instance -- either shared or local </em>
<a name="118" href="#118">118</a> <em>     * to this thread. </em>
<a name="119" href="#119">119</a> <em>     * @return Interpreter to use</em>
<a name="120" href="#120">120</a> <em>     */</em>
<a name="121" href="#121">121</a>     <strong>protected</strong> Interpreter getInterpreter() {
<a name="122" href="#122">122</a>         <strong>if</strong>(sharedInterpreter==<strong>null</strong> 
<a name="123" href="#123">123</a>            &amp;&amp; !(Boolean)getUncheckedAttribute(<strong>null</strong>,ATTR_ISOLATE_THREADS)) {
<a name="124" href="#124">124</a>             <em class="comment">// initialize</em>
<a name="125" href="#125">125</a>             sharedInterpreter = newInterpreter();
<a name="126" href="#126">126</a>         }
<a name="127" href="#127">127</a>         <strong>if</strong>(sharedInterpreter!=<strong>null</strong>) {
<a name="128" href="#128">128</a>             <strong>return</strong> sharedInterpreter;
<a name="129" href="#129">129</a>         }
<a name="130" href="#130">130</a>         Interpreter interpreter = threadInterpreter.get(); 
<a name="131" href="#131">131</a>         <strong>if</strong>(interpreter==<strong>null</strong>) {
<a name="132" href="#132">132</a>             interpreter = newInterpreter(); 
<a name="133" href="#133">133</a>             threadInterpreter.set(interpreter);
<a name="134" href="#134">134</a>         }
<a name="135" href="#135">135</a>         <strong>return</strong> interpreter; 
<a name="136" href="#136">136</a>     }
<a name="137" href="#137">137</a> 
<a name="138" href="#138">138</a>     <em>/**<em>*</em></em>
<a name="139" href="#139">139</a> <em>     * Create a new Interpreter instance, preloaded with any supplied</em>
<a name="140" href="#140">140</a> <em>     * source file and the variables 'self' (this </em>
<a name="141" href="#141">141</a> <em>     * BeanShellProcessor) and 'controller' (the CrawlController). </em>
<a name="142" href="#142">142</a> <em>     * </em>
<a name="143" href="#143">143</a> <em>     * @return  the new Interpreter instance</em>
<a name="144" href="#144">144</a> <em>     */</em>
<a name="145" href="#145">145</a>     <strong>protected</strong> Interpreter newInterpreter() {
<a name="146" href="#146">146</a>         Interpreter interpreter = <strong>new</strong> Interpreter(); 
<a name="147" href="#147">147</a>         <strong>try</strong> {
<a name="148" href="#148">148</a>             interpreter.set(<span class="string">"self"</span>, <strong>this</strong>);
<a name="149" href="#149">149</a>             interpreter.set(<span class="string">"controller"</span>, getController());
<a name="150" href="#150">150</a>             
<a name="151" href="#151">151</a>             String filePath = (String) getUncheckedAttribute(<strong>null</strong>, ATTR_SCRIPT_FILE);
<a name="152" href="#152">152</a>             <strong>if</strong>(filePath.length()>0) {
<a name="153" href="#153">153</a>                 <strong>try</strong> {
<a name="154" href="#154">154</a>                     File file = getSettingsHandler().getPathRelativeToWorkingDirectory(filePath);
<a name="155" href="#155">155</a>                     interpreter.source(file.getPath());
<a name="156" href="#156">156</a>                 } <strong>catch</strong> (IOException e) {
<a name="157" href="#157">157</a>                     logger.log(Level.SEVERE,<span class="string">"unable to read script file"</span>,e);
<a name="158" href="#158">158</a>                 }
<a name="159" href="#159">159</a>             }
<a name="160" href="#160">160</a>         } <strong>catch</strong> (EvalError e) {
<a name="161" href="#161">161</a>             <em class="comment">// TODO Auto-generated catch block</em>
<a name="162" href="#162">162</a>             e.printStackTrace();
<a name="163" href="#163">163</a>         }
<a name="164" href="#164">164</a>         
<a name="165" href="#165">165</a>         <strong>return</strong> interpreter; 
<a name="166" href="#166">166</a>     }
<a name="167" href="#167">167</a>     
<a name="168" href="#168">168</a>     
<a name="169" href="#169">169</a>     <em>/**<em>*</em></em>
<a name="170" href="#170">170</a> <em>     * Setup (or reset) Intepreter variables, as appropraite based on </em>
<a name="171" href="#171">171</a> <em>     * thread-isolation setting. </em>
<a name="172" href="#172">172</a> <em>     */</em>
<a name="173" href="#173">173</a>     <strong>public</strong> <strong>void</strong> kickUpdate() {
<a name="174" href="#174">174</a>         <em class="comment">// TODO make it so running state (tallies, etc.) isn't lost on changes</em>
<a name="175" href="#175">175</a>         <em class="comment">// unless unavoidable</em>
<a name="176" href="#176">176</a>         <strong>if</strong>((Boolean)getUncheckedAttribute(<strong>null</strong>,ATTR_ISOLATE_THREADS)) {
<a name="177" href="#177">177</a>             sharedInterpreter = <strong>null</strong>; 
<a name="178" href="#178">178</a>             threadInterpreter = <strong>new</strong> ThreadLocal&lt;Interpreter>(); 
<a name="179" href="#179">179</a>         } <strong>else</strong> {
<a name="180" href="#180">180</a>             sharedInterpreter = newInterpreter(); 
<a name="181" href="#181">181</a>             threadInterpreter = <strong>null</strong>;
<a name="182" href="#182">182</a>         }
<a name="183" href="#183">183</a>     }
<a name="184" href="#184">184</a> }
</pre>
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