jembeanhelper.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="127" href="#127">127</a>                                <span class="string">"java.lang.Long"</span>,
<a name="128" href="#128">128</a>                                <span class="string">"Lock timeout, in microseconds."</span>,
<a name="129" href="#129">129</a>                                <strong>true</strong>,   <em class="comment">// readable</em>
<a name="130" href="#130">130</a>                                false,  <em class="comment">// writable</em>
<a name="131" href="#131">131</a>                                false), <em class="comment">// isIs</em>
<a name="132" href="#132">132</a>     };
<a name="133" href="#133">133</a> 
<a name="134" href="#134">134</a>     <em class="comment">/*<em class="comment"> </em></em>
<a name="135" href="#135">135</a> <em class="comment">     * TRANSACTIONAL_ATTR attributes are available only for open, transactional</em>
<a name="136" href="#136">136</a> <em class="comment">     * environments.</em>
<a name="137" href="#137">137</a> <em class="comment">     */</em>
<a name="138" href="#138">138</a>     <strong>private</strong> <strong>static</strong> <strong>final</strong> MBeanAttributeInfo [] TRANSACTIONAL_ATTR = {
<a name="139" href="#139">139</a> 
<a name="140" href="#140">140</a>         <strong>new</strong> MBeanAttributeInfo(ATT_IS_SERIALIZABLE,
<a name="141" href="#141">141</a>                                <span class="string">"java.lang.Boolean"</span>,
<a name="142" href="#142">142</a>                                <span class="string">"True if this environment provides "</span> +
<a name="143" href="#143">143</a>                                <span class="string">"Serializable (degree 3) isolation. The "</span> +
<a name="144" href="#144">144</a>                                <span class="string">"default is RepeatableRead isolation."</span>,
<a name="145" href="#145">145</a>                                <strong>true</strong>,   <em class="comment">// readable</em>
<a name="146" href="#146">146</a>                                false,  <em class="comment">// writable</em>
<a name="147" href="#147">147</a>                                <strong>true</strong>),  <em class="comment">// isIs</em>
<a name="148" href="#148">148</a>         <strong>new</strong> MBeanAttributeInfo(ATT_TXN_TIMEOUT,
<a name="149" href="#149">149</a>                                <span class="string">"java.lang.Long"</span>,
<a name="150" href="#150">150</a>                                <span class="string">"Transaction timeout, in seconds. A value "</span> +
<a name="151" href="#151">151</a>                                <span class="string">"of 0 means there is no timeout."</span>,
<a name="152" href="#152">152</a>                                <strong>true</strong>,   <em class="comment">// readable</em>
<a name="153" href="#153">153</a>                                false,  <em class="comment">// writable</em>
<a name="154" href="#154">154</a>                                false)  <em class="comment">// isIs</em>
<a name="155" href="#155">155</a>     };
<a name="156" href="#156">156</a> 
<a name="157" href="#157">157</a>     <em class="comment">/*<em class="comment"> </em></em>
<a name="158" href="#158">158</a> <em class="comment">     * CREATE_ATTR attributes are available when the mbean is configured to</em>
<a name="159" href="#159">159</a> <em class="comment">     * support configuration and opening by the mbean. They express the</em>
<a name="160" href="#160">160</a> <em class="comment">     * configuration settings.</em>
<a name="161" href="#161">161</a> <em class="comment">     */</em>
<a name="162" href="#162">162</a>     <strong>private</strong> <strong>static</strong> <strong>final</strong> MBeanAttributeInfo [] CREATE_ATTR = {
<a name="163" href="#163">163</a>         
<a name="164" href="#164">164</a>         <strong>new</strong> MBeanAttributeInfo(ATT_SET_READ_ONLY,
<a name="165" href="#165">165</a>                                <span class="string">"java.lang.Boolean"</span>,
<a name="166" href="#166">166</a>                                <span class="string">"True if this environment should be opened "</span> +
<a name="167" href="#167">167</a>                                <span class="string">"in readonly mode."</span>,
<a name="168" href="#168">168</a>                                <strong>true</strong>,   <em class="comment">// readable</em>
<a name="169" href="#169">169</a>                                <strong>true</strong>,   <em class="comment">// writable</em>
<a name="170" href="#170">170</a>                                false), <em class="comment">// isIs</em>
<a name="171" href="#171">171</a>         <strong>new</strong> MBeanAttributeInfo(ATT_SET_TRANSACTIONAL,
<a name="172" href="#172">172</a>                                <span class="string">"java.lang.Boolean"</span>,
<a name="173" href="#173">173</a>                                <span class="string">"True if this environment should be opened "</span> +
<a name="174" href="#174">174</a>                                <span class="string">"in transactional mode."</span>,
<a name="175" href="#175">175</a>                                <strong>true</strong>,   <em class="comment">// readable</em>
<a name="176" href="#176">176</a>                                <strong>true</strong>,   <em class="comment">// writable</em>
<a name="177" href="#177">177</a>                                false), <em class="comment">// isIs</em>
<a name="178" href="#178">178</a>         <strong>new</strong> MBeanAttributeInfo(ATT_SET_SERIALIZABLE,
<a name="179" href="#179">179</a>                                <span class="string">"java.lang.Boolean"</span>,
<a name="180" href="#180">180</a>                                <span class="string">"True if this environment should be opened "</span> +
<a name="181" href="#181">181</a>                                <span class="string">"with serializableIsolation. The default is "</span>+
<a name="182" href="#182">182</a>                                <span class="string">"false."</span>,
<a name="183" href="#183">183</a>                                <strong>true</strong>,   <em class="comment">// readable</em>
<a name="184" href="#184">184</a>                                <strong>true</strong>,   <em class="comment">// writable</em>
<a name="185" href="#185">185</a>                                false), <em class="comment">// isIs</em>
<a name="186" href="#186">186</a>     };
<a name="187" href="#187">187</a> 
<a name="188" href="#188">188</a>     <em class="comment">/*<em class="comment"> --------------------- Operations  -------------------------- */</em></em>
<a name="189" href="#189">189</a> 
<a name="190" href="#190">190</a>     <em class="comment">/*<em class="comment"> Operation names */</em></em>
<a name="191" href="#191">191</a>     <strong>static</strong> <strong>final</strong> String OP_CLEAN = <span class="string">"cleanLog"</span>;
<a name="192" href="#192">192</a>     <strong>static</strong> <strong>final</strong> String OP_EVICT = <span class="string">"evictMemory"</span>;
<a name="193" href="#193">193</a>     <strong>static</strong> <strong>final</strong> String OP_CHECKPOINT = <span class="string">"checkpoint"</span>;
<a name="194" href="#194">194</a>     <strong>static</strong> <strong>final</strong> String OP_SYNC = <span class="string">"sync"</span>;
<a name="195" href="#195">195</a>     <strong>static</strong> <strong>final</strong> String OP_ENV_STAT = <span class="string">"getEnvironmentStats"</span>;
<a name="196" href="#196">196</a>     <strong>static</strong> <strong>final</strong> String OP_ENV_STAT_STR = <span class="string">"getEnvironmentStatsToString"</span>;
<a name="197" href="#197">197</a>     <strong>static</strong> <strong>final</strong> String OP_LOCK_STAT = <span class="string">"getLockStats"</span>;
<a name="198" href="#198">198</a>     <strong>static</strong> <strong>final</strong> String OP_LOCK_STAT_STR = <span class="string">"getLockStatsToString"</span>;
<a name="199" href="#199">199</a>     <strong>static</strong> <strong>final</strong> String OP_TXN_STAT = <span class="string">"getTxnStats"</span>;
<a name="200" href="#200">200</a>     <strong>static</strong> <strong>final</strong> String OP_DB_NAMES = <span class="string">"getDatabaseNames"</span>;
<a name="201" href="#201">201</a>     <strong>static</strong> <strong>final</strong> String OP_DB_STAT = <span class="string">"getDatabaseStats"</span>;
<a name="202" href="#202">202</a> 
<a name="203" href="#203">203</a>     <strong>private</strong> <strong>static</strong> <strong>final</strong> MBeanOperationInfo OP_CLEAN_INFO = 
<a name="204" href="#204">204</a>         <strong>new</strong> MBeanOperationInfo(OP_CLEAN,
<a name="205" href="#205">205</a>                                <span class="string">"Remove obsolete environment log files. "</span> +
<a name="206" href="#206">206</a>                                <span class="string">"Zero or more log files will be cleaned as "</span> +
<a name="207" href="#207">207</a>                                <span class="string">"necessary to bring the disk space "</span> +
<a name="208" href="#208">208</a>                                <span class="string">"utilization of the environment above the "</span> +
<a name="209" href="#209">209</a>                                <span class="string">"configured minimum utilization threshold "</span> +
<a name="210" href="#210">210</a>                                <span class="string">"as determined by the setting "</span> +
<a name="211" href="#211">211</a>                                <span class="string">"je.cleaner.minUtilization. Returns the "</span> +
<a name="212" href="#212">212</a>                                <span class="string">"number of files cleaned, that will be "</span> +
<a name="213" href="#213">213</a>                                <span class="string">"deleted at the next qualifying checkpoint."</span>,
<a name="214" href="#214">214</a>                                <strong>new</strong> MBeanParameterInfo[0], <em class="comment">// no params</em>
<a name="215" href="#215">215</a>                                <span class="string">"java.lang.Integer"</span>,
<a name="216" href="#216">216</a>                                MBeanOperationInfo.UNKNOWN);
<a name="217" href="#217">217</a> 
<a name="218" href="#218">218</a>     <strong>private</strong> <strong>static</strong> <strong>final</strong> MBeanOperationInfo OP_EVICT_INFO = 
<a name="219" href="#219">219</a>         <strong>new</strong> MBeanOperationInfo(OP_EVICT,
<a name="220" href="#220">220</a>                                <span class="string">"Reduce cache usage to the threshold "</span> +
<a name="221" href="#221">221</a>                                <span class="string">"determined by the setting "</span> +
<a name="222" href="#222">222</a>                                <span class="string">"je.evictor.useMemoryFloor. "</span>,
<a name="223" href="#223">223</a>                                <strong>new</strong> MBeanParameterInfo[0], <em class="comment">// no params</em>
<a name="224" href="#224">224</a>                                <span class="string">"void"</span>,
<a name="225" href="#225">225</a>                                MBeanOperationInfo.UNKNOWN);
<a name="226" href="#226">226</a> 
<a name="227" href="#227">227</a>     <em class="comment">/*<em class="comment"> parameter for checkpoint operation. */</em></em>
<a name="228" href="#228">228</a>     <strong>private</strong> <strong>static</strong> <strong>final</strong> MBeanParameterInfo [] checkpointParams = {
<a name="229" href="#229">229</a>         <strong>new</strong> MBeanParameterInfo (<span class="string">"force"</span>, <span class="string">"java.lang.Boolean"</span>,
<a name="230" href="#230">230</a>                                 <span class="string">"If true, force a checkpoint even if "</span> +
<a name="231" href="#231">231</a>                                 <span class="string">"there has been no activity since the last "</span> +
<a name="232" href="#232">232</a>                                 <span class="string">"checkpoint. Returns true if a checkpoint "</span> +
<a name="233" href="#233">233</a>                                 <span class="string">"executed."</span>)
<a name="234" href="#234">234</a>     };
<a name="235" href="#235">235</a> 
<a name="236" href="#236">236</a>     <strong>private</strong> <strong>static</strong> <strong>final</strong> MBeanOperationInfo OP_CHECKPOINT_INFO = 
<a name="237" href="#237">237</a>         <strong>new</strong> MBeanOperationInfo(OP_CHECKPOINT,
<a name="238" href="#238">238</a>                                <span class="string">"Checkpoint the environment."</span>,
<a name="239" href="#239">239</a>                                checkpointParams,
<a name="240" href="#240">240</a>                                <span class="string">"void"</span>,
<a name="241" href="#241">241</a>                                MBeanOperationInfo.UNKNOWN);
<a name="242" href="#242">242</a> 
<a name="243" href="#243">243</a>     <strong>private</strong> <strong>static</strong> <strong>final</strong> MBeanOperationInfo OP_SYNC_INFO = 
<a name="244" href="#244">244</a>         <strong>new</strong> MBeanOperationInfo(OP_SYNC,
<a name="245" href="#245">245</a>                                <span class="string">"Flush the environment to stable storage."</span>,
<a name="246" href="#246">246</a>                                <strong>new</strong> MBeanParameterInfo[0], <em class="comment">// no params</em>
<a name="247" href="#247">247</a>                                <span class="string">"void"</span>,
<a name="248" href="#248">248</a>                                MBeanOperationInfo.UNKNOWN);
<a name="249" href="#249">249</a> 
<a name="250" href="#250">250</a>     <strong>private</strong> <strong>static</strong> <strong>final</strong> MBeanParameterInfo [] statParams = {
<a name="251" href="#251">251</a>         <strong>new</strong> MBeanParameterInfo (<span class="string">"clear"</span>, <span class="string">"java.lang.Boolean"</span>,
<a name="252" href="#252">252</a>                                 <span class="string">"If true, reset statistics after reading."</span>),
<a name="253" href="#253">253</a>         <strong>new</strong> MBeanParameterInfo (<span class="string">"fast"</span>, <span class="string">"java.lang.Boolean"</span>,
<a name="254" href="#254">254</a>                                 <span class="string">"If true, only return statistics which do "</span> +
<a name="255" href="#255">255</a>                                 <span class="string">"not require expensive computation."</span>)
<a name="256" href="#256">256</a> 
<a name="257" href="#257">257</a>     };
<a name="258" href="#258">258</a> 
<a name="259" href="#259">259</a>     <strong>private</strong> <strong>static</strong> <strong>final</strong> MBeanOperationInfo OP_ENV_STAT_INFO = 
<a name="260" href="#260">260</a>         <strong>new</strong> MBeanOperationInfo(OP_ENV_STAT,
<a name="261" href="#261">261</a>                                <span class="string">"Get environment statistics."</span>,