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<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"><html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en" lang="en"><head><meta http-equiv="content-type" content="text/html; charset=UTF-8" /><title>JEMBeanHelper xref</title><link type="text/css" rel="stylesheet" href="../../../stylesheet.css" /></head><body><div id="overview"><a href="../../../../apidocs/org/archive/util/JEMBeanHelper.html">View Javadoc</a></div><pre><a name="1" href="#1">1</a> <em class="comment">/*<em class="comment">-</em></em><a name="2" href="#2">2</a> <em class="comment">* See the file LICENSE for redistribution information.</em><a name="3" href="#3">3</a> <em class="comment">*</em><a name="4" href="#4">4</a> <em class="comment">* Copyright (c) 2002-2005</em><a name="5" href="#5">5</a> <em class="comment">* Sleepycat Software. All rights reserved.</em><a name="6" href="#6">6</a> <em class="comment">*</em><a name="7" href="#7">7</a> <em class="comment">* $Id: JEMBeanHelper.java,v 1.1 2005/06/22 01:23:22 stack-sf Exp $</em><a name="8" href="#8">8</a> <em class="comment">*/</em><a name="9" href="#9">9</a> <a name="10" href="#10">10</a> <strong>package</strong> <a href="../../../org/archive/util/package-summary.html">org.archive.util</a>;<a name="11" href="#11">11</a> <a name="12" href="#12">12</a> <strong>import</strong> java.io.File;<a name="13" href="#13">13</a> <strong>import</strong> java.util.ArrayList;<a name="14" href="#14">14</a> <strong>import</strong> java.util.List;<a name="15" href="#15">15</a> <a name="16" href="#16">16</a> <strong>import</strong> javax.management.Attribute;<a name="17" href="#17">17</a> <strong>import</strong> javax.management.AttributeNotFoundException;<a name="18" href="#18">18</a> <strong>import</strong> javax.management.InvalidAttributeValueException;<a name="19" href="#19">19</a> <strong>import</strong> javax.management.MBeanAttributeInfo;<a name="20" href="#20">20</a> <strong>import</strong> javax.management.MBeanException;<a name="21" href="#21">21</a> <strong>import</strong> javax.management.MBeanNotificationInfo;<a name="22" href="#22">22</a> <strong>import</strong> javax.management.MBeanOperationInfo;<a name="23" href="#23">23</a> <strong>import</strong> javax.management.MBeanParameterInfo;<a name="24" href="#24">24</a> <a name="25" href="#25">25</a> <strong>import</strong> com.sleepycat.je.CheckpointConfig;<a name="26" href="#26">26</a> <strong>import</strong> com.sleepycat.je.Database;<a name="27" href="#27">27</a> <strong>import</strong> com.sleepycat.je.DatabaseConfig;<a name="28" href="#28">28</a> <strong>import</strong> com.sleepycat.je.DatabaseException;<a name="29" href="#29">29</a> <strong>import</strong> com.sleepycat.je.DatabaseStats;<a name="30" href="#30">30</a> <strong>import</strong> com.sleepycat.je.DbInternal;<a name="31" href="#31">31</a> <strong>import</strong> com.sleepycat.je.Environment;<a name="32" href="#32">32</a> <strong>import</strong> com.sleepycat.je.EnvironmentConfig;<a name="33" href="#33">33</a> <strong>import</strong> com.sleepycat.je.EnvironmentMutableConfig;<a name="34" href="#34">34</a> <strong>import</strong> com.sleepycat.je.StatsConfig;<a name="35" href="#35">35</a> <a name="36" href="#36">36</a> <em>/**<em>*</em></em><a name="37" href="#37">37</a> <em> * JEMBeanHelper is a utility class for the MBean implementation which wants to</em><a name="38" href="#38">38</a> <em> * add management of a JE environment to its capabilities. MBean</em><a name="39" href="#39">39</a> <em> * implementations can contain a JEMBeanHelper instance to get MBean metadata</em><a name="40" href="#40">40</a> <em> * for JE and to set attributes, get attributes, and invoke operations.</em><a name="41" href="#41">41</a> <em> * <p></em><a name="42" href="#42">42</a> <em> * com.sleepycat.je.jmx.JEMonitor and</em><a name="43" href="#43">43</a> <em> * the example program jmx.JEApplicationMBean are two MBean implementations</em><a name="44" href="#44">44</a> <em> * which provide support different application use cases. See those classes for</em><a name="45" href="#45">45</a> <em> * examples of how to use JEMBeanHelper.</em><a name="46" href="#46">46</a> <em> * <p>This class was copied from the bdb je 2.0 jmx examples.</em><a name="47" href="#47">47</a> <em> */</em><a name="48" href="#48">48</a> <a name="49" href="#49">49</a> <strong>public</strong> <strong>class</strong> <a href="../../../org/archive/util/JEMBeanHelper.html">JEMBeanHelper</a> {<a name="50" href="#50">50</a> <a name="51" href="#51">51</a> <em class="comment">/*</em><a name="52" href="#52">52</a> <em class="comment"> * A note to JE developers: all available JE attributes and operations are</em><a name="53" href="#53">53</a> <em class="comment"> * described in the following static info arrays. New management</em><a name="54" href="#54">54</a> <em class="comment"> * functionality can be added to the helper by adding to the appropriate</em><a name="55" href="#55">55</a> <em class="comment"> * set of static definitions. For example, if we want to add a new JE</em><a name="56" href="#56">56</a> <em class="comment"> * attribute called "foo", which is available for open environments, we</em><a name="57" href="#57">57</a> <em class="comment"> * need to define a new MBeanAttributeInfo in the OPEN_ATTR array. The</em><a name="58" href="#58">58</a> <em class="comment"> * helper then needs to provide an implementation in set/getAttribute.</em><a name="59" href="#59">59</a> <em class="comment"> */</em><a name="60" href="#60">60</a> <a name="61" href="#61">61</a> <em class="comment">/*<em class="comment"> --------------------- Attributes -------------------------- */</em></em><a name="62" href="#62">62</a> <a name="63" href="#63">63</a> <em class="comment">/*<em class="comment"> Attribute names. */</em></em><a name="64" href="#64">64</a> <strong>public</strong> <strong>static</strong> <strong>final</strong> String ATT_ENV_HOME = <span class="string">"environmentHome"</span>;<a name="65" href="#65">65</a> <strong>public</strong> <strong>static</strong> <strong>final</strong> String ATT_OPEN = <span class="string">"isOpen"</span>;<a name="66" href="#66">66</a> <strong>public</strong> <strong>static</strong> <strong>final</strong> String ATT_IS_READ_ONLY = <span class="string">"isReadOnly"</span>;<a name="67" href="#67">67</a> <strong>public</strong> <strong>static</strong> <strong>final</strong> String ATT_IS_TRANSACTIONAL = <span class="string">"isTransactional"</span>;<a name="68" href="#68">68</a> <strong>public</strong> <strong>static</strong> <strong>final</strong> String ATT_CACHE_SIZE = <span class="string">"cacheSize"</span>;<a name="69" href="#69">69</a> <strong>public</strong> <strong>static</strong> <strong>final</strong> String ATT_CACHE_PERCENT = <span class="string">"cachePercent"</span>;<a name="70" href="#70">70</a> <strong>public</strong> <strong>static</strong> <strong>final</strong> String ATT_LOCK_TIMEOUT = <span class="string">"lockTimeout"</span>;<a name="71" href="#71">71</a> <strong>public</strong> <strong>static</strong> <strong>final</strong> String ATT_IS_SERIALIZABLE = <span class="string">"isSerializableIsolation"</span>;<a name="72" href="#72">72</a> <strong>public</strong> <strong>static</strong> <strong>final</strong> String ATT_TXN_TIMEOUT = <span class="string">"transactionTimeout"</span>;<a name="73" href="#73">73</a> <strong>public</strong> <strong>static</strong> <strong>final</strong> String ATT_SET_READ_ONLY = <span class="string">"openReadOnly"</span>;<a name="74" href="#74">74</a> <strong>public</strong> <strong>static</strong> <strong>final</strong> String ATT_SET_TRANSACTIONAL = <span class="string">"openTransactional"</span>;<a name="75" href="#75">75</a> <strong>public</strong> <strong>static</strong> <strong>final</strong> String ATT_SET_SERIALIZABLE =<a name="76" href="#76">76</a> <span class="string">"openSerializableIsolation"</span>;<a name="77" href="#77">77</a> <a name="78" href="#78">78</a> <em class="comment">/*<em class="comment"> COMMON_ATTR attributes are available for any environment. */</em></em><a name="79" href="#79">79</a> <strong>private</strong> <strong>static</strong> <strong>final</strong> MBeanAttributeInfo [] COMMON_ATTR = {<a name="80" href="#80">80</a> <a name="81" href="#81">81</a> <strong>new</strong> MBeanAttributeInfo(ATT_ENV_HOME,<a name="82" href="#82">82</a> <span class="string">"java.lang.String"</span>,<a name="83" href="#83">83</a> <span class="string">"Environment home directory."</span>,<a name="84" href="#84">84</a> <strong>true</strong>, <em class="comment">// readable</em><a name="85" href="#85">85</a> false, <em class="comment">// writable</em><a name="86" href="#86">86</a> false), <em class="comment">// isIs</em><a name="87" href="#87">87</a> <strong>new</strong> MBeanAttributeInfo(ATT_OPEN,<a name="88" href="#88">88</a> <span class="string">"java.lang.Boolean"</span>,<a name="89" href="#89">89</a> <span class="string">"True if this environment is open."</span>,<a name="90" href="#90">90</a> <strong>true</strong>, <em class="comment">// readable</em><a name="91" href="#91">91</a> false, <em class="comment">// writable</em><a name="92" href="#92">92</a> <strong>true</strong>) <em class="comment">// isIs</em><a name="93" href="#93">93</a> };<a name="94" href="#94">94</a> <a name="95" href="#95">95</a> <em class="comment">/*<em class="comment"> OPEN_ATTR attributes are available for all open environments. */</em></em><a name="96" href="#96">96</a> <strong>private</strong> <strong>static</strong> <strong>final</strong> MBeanAttributeInfo [] OPEN_ATTR = {<a name="97" href="#97">97</a> <a name="98" href="#98">98</a> <strong>new</strong> MBeanAttributeInfo(ATT_IS_READ_ONLY,<a name="99" href="#99">99</a> <span class="string">"java.lang.Boolean"</span>,<a name="100" href="#100">100</a> <span class="string">"True if this environment is read only."</span>,<a name="101" href="#101">101</a> <strong>true</strong>, <em class="comment">// readable</em><a name="102" href="#102">102</a> false, <em class="comment">// writable</em><a name="103" href="#103">103</a> <strong>true</strong>), <em class="comment">// isIs</em><a name="104" href="#104">104</a> <strong>new</strong> MBeanAttributeInfo(ATT_IS_TRANSACTIONAL,<a name="105" href="#105">105</a> <span class="string">"java.lang.Boolean"</span>,<a name="106" href="#106">106</a> <span class="string">"True if this environment supports transactions."</span>,<a name="107" href="#107">107</a> <strong>true</strong>, <em class="comment">// readable</em><a name="108" href="#108">108</a> false, <em class="comment">// writable</em><a name="109" href="#109">109</a> <strong>true</strong>), <em class="comment">// isIs</em><a name="110" href="#110">110</a> <strong>new</strong> MBeanAttributeInfo(ATT_CACHE_SIZE,<a name="111" href="#111">111</a> <span class="string">"java.lang.Long"</span>,<a name="112" href="#112">112</a> <span class="string">"Cache size, in bytes."</span>,<a name="113" href="#113">113</a> <strong>true</strong>, <em class="comment">// readable</em><a name="114" href="#114">114</a> <strong>true</strong>, <em class="comment">// writable</em><a name="115" href="#115">115</a> false), <em class="comment">// isIs</em><a name="116" href="#116">116</a> <strong>new</strong> MBeanAttributeInfo(ATT_CACHE_PERCENT,<a name="117" href="#117">117</a> <span class="string">"java.lang.Integer"</span>,<a name="118" href="#118">118</a> <span class="string">"By default, cache size is (cachePercent * "</span> +<a name="119" href="#119">119</a> <span class="string">"JVM maximum memory. To change the cache size "</span>+<a name="120" href="#120">120</a> <span class="string">"using a percentage of the heap size, set "</span> +<a name="121" href="#121">121</a> <span class="string">"the cache size to 0 and cachePercent to the "</span>+<a name="122" href="#122">122</a> <span class="string">"desired percentage value."</span>,<a name="123" href="#123">123</a> <strong>true</strong>, <em class="comment">// readable</em><a name="124" href="#124">124</a> <strong>true</strong>, <em class="comment">// writable</em><a name="125" href="#125">125</a> false), <em class="comment">// isIs</em><a name="126" href="#126">126</a> <strong>new</strong> MBeanAttributeInfo(ATT_LOCK_TIMEOUT,⌨️ 快捷键说明
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