<a name="88" href="#88">88</a>          <strong>try</strong> {<a name="89" href="#89">89</a>              <strong>final</strong> <a href="../../../../org/archive/crawler/frontier/BdbMultipleWorkQueues.html">BdbMultipleWorkQueues</a> queues = ((BdbFrontier) frontier)<a name="90" href="#90">90</a>                  .getWorkQueues();<a name="91" href="#91">91</a>               queues.delete(peekItem);<a name="92" href="#92">92</a>          } <strong>catch</strong> (DatabaseException e) {<a name="93" href="#93">93</a>              e.printStackTrace();<a name="94" href="#94">94</a>              <strong>throw</strong> IoUtils.wrapAsIOException(e);<a name="95" href="#95">95</a>          }<a name="96" href="#96">96</a>      }<a name="97" href="#97">97</a>  <a name="98" href="#98">98</a>      <strong>protected</strong> <a href="../../../../org/archive/crawler/datamodel/CrawlURI.html">CrawlURI</a> peekItem(<strong>final</strong> <a href="../../../../org/archive/crawler/frontier/WorkQueueFrontier.html">WorkQueueFrontier</a> frontier)<a name="99" href="#99">99</a>      throws IOException {<a name="100" href="#100">100</a>         <strong>final</strong> <a href="../../../../org/archive/crawler/frontier/BdbMultipleWorkQueues.html">BdbMultipleWorkQueues</a> queues = ((BdbFrontier) frontier)<a name="101" href="#101">101</a>             .getWorkQueues();<a name="102" href="#102">102</a>         DatabaseEntry key = <strong>new</strong> DatabaseEntry(origin);<a name="103" href="#103">103</a>         <a href="../../../../org/archive/crawler/datamodel/CrawlURI.html">CrawlURI</a> curi = <strong>null</strong>;<a name="104" href="#104">104</a>         <strong>int</strong> tries = 1;<a name="105" href="#105">105</a>         <strong>while</strong>(<strong>true</strong>) {<a name="106" href="#106">106</a>             <strong>try</strong> {<a name="107" href="#107">107</a>                 curi = queues.get(key);<a name="108" href="#108">108</a>             } <strong>catch</strong> (DatabaseException e) {<a name="109" href="#109">109</a>                 LOGGER.log(Level.SEVERE,<span class="string">"peekItem failure; retrying"</span>,e);<a name="110" href="#110">110</a>             }<a name="111" href="#111">111</a>             <a name="112" href="#112">112</a>             <em class="comment">// ensure CrawlURI, if any,  came from acceptable range: </em><a name="113" href="#113">113</a>             <strong>if</strong>(!ArchiveUtils.startsWith(key.getData(),origin)) {<a name="114" href="#114">114</a>                 LOGGER.severe(<a name="115" href="#115">115</a>                     <span class="string">"inconsistency: "</span>+classKey+<span class="string">"("</span>+<a name="116" href="#116">116</a>                     getPrefixClassKey(origin)+<span class="string">") with "</span> + getCount() + <span class="string">" items gave "</span><a name="117" href="#117">117</a>                     + curi +<span class="string">"("</span>+getPrefixClassKey(key.getData()));<a name="118" href="#118">118</a>                 <em class="comment">// clear curi to allow retry</em><a name="119" href="#119">119</a>                 curi = <strong>null</strong>; <a name="120" href="#120">120</a>                 <em class="comment">// reset key to original origin for retry</em><a name="121" href="#121">121</a>                 key.setData(origin);<a name="122" href="#122">122</a>             }<a name="123" href="#123">123</a>             <a name="124" href="#124">124</a>             <strong>if</strong> (curi!=<strong>null</strong>) {<a name="125" href="#125">125</a>                 <em class="comment">// success</em><a name="126" href="#126">126</a>                 <strong>break</strong>;<a name="127" href="#127">127</a>             }<a name="128" href="#128">128</a>             <a name="129" href="#129">129</a>             <strong>if</strong> (tries>3) {<a name="130" href="#130">130</a>                 LOGGER.severe(<span class="string">"no item where expected in queue "</span>+classKey);<a name="131" href="#131">131</a>                 <strong>break</strong>;<a name="132" href="#132">132</a>             }<a name="133" href="#133">133</a>             tries++;<a name="134" href="#134">134</a>             LOGGER.severe(<span class="string">"Trying get #"</span> + Integer.toString(tries)<a name="135" href="#135">135</a>                     + <span class="string">" in queue "</span> + classKey + <span class="string">" with "</span> + getCount()<a name="136" href="#136">136</a>                     + <span class="string">" items using key "</span><a name="137" href="#137">137</a>                     + getPrefixClassKey(key.getData()));<a name="138" href="#138">138</a>         }<a name="139" href="#139">139</a>  <a name="140" href="#140">140</a>         <strong>return</strong> curi;<a name="141" href="#141">141</a>     }<a name="142" href="#142">142</a> <a name="143" href="#143">143</a>     <strong>protected</strong> <strong>void</strong> insertItem(<strong>final</strong> <a href="../../../../org/archive/crawler/frontier/WorkQueueFrontier.html">WorkQueueFrontier</a> frontier,<a name="144" href="#144">144</a>             <strong>final</strong> <a href="../../../../org/archive/crawler/datamodel/CrawlURI.html">CrawlURI</a> curi, <strong>boolean</strong> overwriteIfPresent) throws IOException {<a name="145" href="#145">145</a>         <strong>try</strong> {<a name="146" href="#146">146</a>             <strong>final</strong> <a href="../../../../org/archive/crawler/frontier/BdbMultipleWorkQueues.html">BdbMultipleWorkQueues</a> queues = ((BdbFrontier) frontier)<a name="147" href="#147">147</a>                 .getWorkQueues();<a name="148" href="#148">148</a>             queues.put(curi, overwriteIfPresent);<a name="149" href="#149">149</a>             <strong>if</strong> (LOGGER.isLoggable(Level.FINE)) {<a name="150" href="#150">150</a>                 LOGGER.fine(<span class="string">"Inserted into "</span> + getPrefixClassKey(<strong>this</strong>.origin) +<a name="151" href="#151">151</a>                     <span class="string">" (count "</span> + Long.toString(getCount())+ <span class="string">"): "</span> +<a name="152" href="#152">152</a>                         curi.toString());<a name="153" href="#153">153</a>             }<a name="154" href="#154">154</a>         } <strong>catch</strong> (DatabaseException e) {<a name="155" href="#155">155</a>             <strong>throw</strong> IoUtils.wrapAsIOException(e);<a name="156" href="#156">156</a>         }<a name="157" href="#157">157</a>     }<a name="158" href="#158">158</a>     <a name="159" href="#159">159</a>     <em>/**<em>*</em></em><a name="160" href="#160">160</a> <em>     * @param byteArray Byte array to get hex string of.</em><a name="161" href="#161">161</a> <em>     * @return Hex string of passed in byte array (Used logging</em><a name="162" href="#162">162</a> <em>     * key-prefixes).</em><a name="163" href="#163">163</a> <em>     */</em><a name="164" href="#164">164</a>     <strong>protected</strong> <strong>static</strong> String getPrefixClassKey(<strong>final</strong> byte [] byteArray) {<a name="165" href="#165">165</a>         <strong>int</strong> zeroIndex = 0;<a name="166" href="#166">166</a>         <strong>while</strong>(byteArray[zeroIndex]!=0) {<a name="167" href="#167">167</a>             zeroIndex++;<a name="168" href="#168">168</a>         }<a name="169" href="#169">169</a>         <strong>try</strong> {<a name="170" href="#170">170</a>             <strong>return</strong> <strong>new</strong> String(byteArray,0,zeroIndex,<span class="string">"UTF-8"</span>);<a name="171" href="#171">171</a>         } <strong>catch</strong> (UnsupportedEncodingException e) {<a name="172" href="#172">172</a>             <em class="comment">// should be impossible; UTF-8 always available</em><a name="173" href="#173">173</a>             e.printStackTrace();<a name="174" href="#174">174</a>             <strong>return</strong> e.getMessage();<a name="175" href="#175">175</a>         }<a name="176" href="#176">176</a>     }<a name="177" href="#177">177</a> }</pre><hr/><div id="footer">This page was automatically generated by <a href="http://maven.apache.org/">Maven</a></div></body></html>