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="532" href="#532">532</a> <em>     *</em>
<a name="533" href="#533">533</a> <em>     * @param targetEnv The target JE environment. May be null if the</em>
<a name="534" href="#534">534</a> <em>     * environment is not open.</em>
<a name="535" href="#535">535</a> <em>     * @param attribute name/value pair</em>
<a name="536" href="#536">536</a> <em>     */</em>
<a name="537" href="#537">537</a>     <strong>public</strong> <strong>void</strong> setAttribute(Environment targetEnv,
<a name="538" href="#538">538</a>                              Attribute attribute) 
<a name="539" href="#539">539</a>         throws AttributeNotFoundException,
<a name="540" href="#540">540</a>                InvalidAttributeValueException {
<a name="541" href="#541">541</a> 
<a name="542" href="#542">542</a>         <strong>if</strong> (attribute == <strong>null</strong>) {
<a name="543" href="#543">543</a>             <strong>throw</strong> <strong>new</strong> AttributeNotFoundException(<span class="string">"Attribute cannot be null"</span>);
<a name="544" href="#544">544</a>         }
<a name="545" href="#545">545</a> 
<a name="546" href="#546">546</a>         <em class="comment">/*<em class="comment"> Sanity check parameters. */</em></em>
<a name="547" href="#547">547</a>         String name = attribute.getName();
<a name="548" href="#548">548</a>         Object value = attribute.getValue();
<a name="549" href="#549">549</a> 
<a name="550" href="#550">550</a> 	<strong>if</strong> (name == <strong>null</strong>) {
<a name="551" href="#551">551</a> 	    <strong>throw</strong> <strong>new</strong> AttributeNotFoundException(
<a name="552" href="#552">552</a>                                      <span class="string">"Attribute name cannot be null"</span>);
<a name="553" href="#553">553</a> 	}
<a name="554" href="#554">554</a> 
<a name="555" href="#555">555</a> 	<strong>if</strong> (value == <strong>null</strong>) {
<a name="556" href="#556">556</a> 	    <strong>throw</strong> <strong>new</strong> InvalidAttributeValueException(
<a name="557" href="#557">557</a>                                       <span class="string">"Attribute value for attribute "</span> +
<a name="558" href="#558">558</a>                                       name + <span class="string">" cannot be null"</span>);
<a name="559" href="#559">559</a> 	}
<a name="560" href="#560">560</a> 
<a name="561" href="#561">561</a>         <strong>try</strong> {
<a name="562" href="#562">562</a>             <strong>if</strong> (name.equals(ATT_SET_READ_ONLY)) {
<a name="563" href="#563">563</a>                 openConfig.setReadOnly(((Boolean) value).booleanValue());
<a name="564" href="#564">564</a>             } <strong>else</strong> <strong>if</strong> (name.equals(ATT_SET_TRANSACTIONAL)) {
<a name="565" href="#565">565</a>                 openConfig.setTransactional(((Boolean) value).booleanValue());
<a name="566" href="#566">566</a>             } <strong>else</strong> <strong>if</strong> (name.equals(ATT_SET_SERIALIZABLE)) {
<a name="567" href="#567">567</a>                 openConfig.setTxnSerializableIsolation(
<a name="568" href="#568">568</a>                                              ((Boolean) value).booleanValue());
<a name="569" href="#569">569</a>             } <strong>else</strong> {
<a name="570" href="#570">570</a>                 <em class="comment">/*<em class="comment"> Set the specified attribute if the environment is open. */</em></em>
<a name="571" href="#571">571</a>                 <strong>if</strong> (targetEnv != <strong>null</strong>) {
<a name="572" href="#572">572</a> 
<a name="573" href="#573">573</a>                     EnvironmentMutableConfig config =
<a name="574" href="#574">574</a>                         targetEnv.getMutableConfig();
<a name="575" href="#575">575</a> 
<a name="576" href="#576">576</a>                     <strong>if</strong> (name.equals(ATT_CACHE_SIZE)) {
<a name="577" href="#577">577</a>                         config.setCacheSize(((Long) value).longValue());
<a name="578" href="#578">578</a>                         targetEnv.setMutableConfig(config);
<a name="579" href="#579">579</a>                     } <strong>else</strong> <strong>if</strong> (name.equals(ATT_CACHE_PERCENT)) {
<a name="580" href="#580">580</a>                         config.setCachePercent(((Integer) value).intValue());
<a name="581" href="#581">581</a>                         targetEnv.setMutableConfig(config);
<a name="582" href="#582">582</a>                     } <strong>else</strong> {
<a name="583" href="#583">583</a>                         <strong>throw</strong> <strong>new</strong> AttributeNotFoundException(<span class="string">"attribute "</span> +
<a name="584" href="#584">584</a>                                                              name +
<a name="585" href="#585">585</a>                                                              <span class="string">" is not valid."</span>);
<a name="586" href="#586">586</a>                     }
<a name="587" href="#587">587</a>                 } <strong>else</strong> {
<a name="588" href="#588">588</a>                     <strong>throw</strong> <strong>new</strong> AttributeNotFoundException(<span class="string">"attribute "</span> +
<a name="589" href="#589">589</a>                                                          name +
<a name="590" href="#590">590</a>                                                          <span class="string">" is not valid."</span>);
<a name="591" href="#591">591</a>                 }
<a name="592" href="#592">592</a>             }
<a name="593" href="#593">593</a>         } <strong>catch</strong> (NumberFormatException e) {
<a name="594" href="#594">594</a>             <strong>throw</strong> <strong>new</strong> InvalidAttributeValueException(<span class="string">"attribute name="</span> + name);
<a name="595" href="#595">595</a>         } <strong>catch</strong> (DatabaseException e) {
<a name="596" href="#596">596</a>             <strong>throw</strong> <strong>new</strong> InvalidAttributeValueException(<span class="string">"attribute name="</span> + name +
<a name="597" href="#597">597</a>                                                      e.getMessage());
<a name="598" href="#598">598</a>         }
<a name="599" href="#599">599</a>     }
<a name="600" href="#600">600</a> 
<a name="601" href="#601">601</a>     <em>/**<em>*******************************************************************/</em></em>
<a name="602" href="#602">602</a>     <em class="comment">/*<em class="comment"> JE Operations                                                    */</em></em>
<a name="603" href="#603">603</a>     <em>/**<em>*******************************************************************/</em></em>
<a name="604" href="#604">604</a> 
<a name="605" href="#605">605</a>     <em>/**<em>*</em></em>
<a name="606" href="#606">606</a> <em>     * Get mbean operation metadata for this environment.</em>
<a name="607" href="#607">607</a> <em>     *</em>
<a name="608" href="#608">608</a> <em>     * @param targetEnv The target JE environment. May be null if the</em>
<a name="609" href="#609">609</a> <em>     * environment is not open.</em>
<a name="610" href="#610">610</a> <em>     * @return List of MBeanOperationInfo describing available operations.</em>
<a name="611" href="#611">611</a> <em>     */</em>
<a name="612" href="#612">612</a>     <strong>public</strong> List getOperationList(Environment targetEnv) {
<a name="613" href="#613">613</a>         setNeedReset(false);
<a name="614" href="#614">614</a> 
<a name="615" href="#615">615</a>         List operationList = <strong>new</strong> ArrayList();
<a name="616" href="#616">616</a> 
<a name="617" href="#617">617</a>         <strong>if</strong> (targetEnv != <strong>null</strong>) {
<a name="618" href="#618">618</a>             <em class="comment">/*<em class="comment"> </em></em>
<a name="619" href="#619">619</a> <em class="comment">             * These operations are only available if the environment is</em>
<a name="620" href="#620">620</a> <em class="comment">             * open.</em>
<a name="621" href="#621">621</a> <em class="comment">             */</em>
<a name="622" href="#622">622</a>             operationList.add(OP_CLEAN_INFO);
<a name="623" href="#623">623</a>             operationList.add(OP_EVICT_INFO);
<a name="624" href="#624">624</a>             operationList.add(OP_ENV_STAT_INFO);
<a name="625" href="#625">625</a>             operationList.add(OP_ENV_STAT_STR_INFO);
<a name="626" href="#626">626</a>             operationList.add(OP_LOCK_STAT_INFO);
<a name="627" href="#627">627</a>             operationList.add(OP_LOCK_STAT_STR_INFO);
<a name="628" href="#628">628</a>             operationList.add(OP_DB_NAMES_INFO);
<a name="629" href="#629">629</a>             operationList.add(OP_DB_STAT_INFO);
<a name="630" href="#630">630</a> 
<a name="631" href="#631">631</a>             <em class="comment">/*<em class="comment"> Add checkpoint only for transactional environments. */</em></em>
<a name="632" href="#632">632</a>             <strong>boolean</strong> isTransactional = false;
<a name="633" href="#633">633</a>             <strong>try</strong> {
<a name="634" href="#634">634</a>                 EnvironmentConfig config = targetEnv.getConfig();
<a name="635" href="#635">635</a>                 isTransactional = config.getTransactional();
<a name="636" href="#636">636</a>             } <strong>catch</strong> (DatabaseException e) {
<a name="637" href="#637">637</a>                 <em class="comment">/*<em class="comment"> Don't make any operations available. */</em></em>
<a name="638" href="#638">638</a>                 <strong>return</strong> <strong>new</strong> ArrayList();
<a name="639" href="#639">639</a>             }
<a name="640" href="#640">640</a>             
<a name="641" href="#641">641</a>             <strong>if</strong> (isTransactional) {
<a name="642" href="#642">642</a>                 operationList.add(OP_CHECKPOINT_INFO);
<a name="643" href="#643">643</a>                 operationList.add(OP_TXN_STAT_INFO);
<a name="644" href="#644">644</a>             } <strong>else</strong> {
<a name="645" href="#645">645</a>                 operationList.add(OP_SYNC_INFO);
<a name="646" href="#646">646</a>             }
<a name="647" href="#647">647</a>         }
<a name="648" href="#648">648</a> 
<a name="649" href="#649">649</a>         <strong>return</strong> operationList;
<a name="650" href="#650">650</a>     }
<a name="651" href="#651">651</a> 
<a name="652" href="#652">652</a>     <em>/**<em>*</em></em>
<a name="653" href="#653">653</a> <em>     * Invoke an operation for the given environment.</em>
<a name="654" href="#654">654</a> <em>     * </em>
<a name="655" href="#655">655</a> <em>     * @param targetEnv The target JE environment. May be null if the</em>
<a name="656" href="#656">656</a> <em>     * environment is not open.</em>
<a name="657" href="#657">657</a> <em>     * @param actionName operation name.</em>
<a name="658" href="#658">658</a> <em>     * @param params operation parameters. May be null.</em>
<a name="659" href="#659">659</a> <em>     * @param signature operation signature. May be null.</em>
<a name="660" href="#660">660</a> <em>     * @return the operation result</em>
<a name="661" href="#661">661</a> <em>     */</em>
<a name="662" href="#662">662</a>     <strong>public</strong> Object invoke(Environment targe