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package org.javasimon.jdbc4.jmx;

import org.javasimon.jmx.StopwatchSample;

/**
 * Interface of JDBC management bean (MXBean).
 * 

* JDBC MXBean provides management operations for monitoring JDBC driver * and operations to retrieve gathered statistics from special JDBC hierarchy of Simons.
* This JDBC hierarchy of Simon is well known and specified in JDBC javadoc * ({@link org.javasimon.jdbc4}). There is prefix of this hierarchy that is associated with * one instance of monitored JDBC driver. Typically, there is only one driver instance used * in application, because of connection to one type of database. If application is connected * to different types of database (i.e. oracle and mysql), there is possibility to differentiate * each used driver by specifying Simon hierarchy prefix for driver.
* Jdbc mxbean has prefix associated with it. It's is initialized through mxbean implementation * class constructor ({@link JdbcMXBeanImpl#JdbcMXBeanImpl(org.javasimon.Manager, String)}) * or later through setter ({@link #setPrefix(String)}). Then is also possible to register Jdbc mxbean * for each prefix. *

* Monitoring of the JDBC driver is enabled only if Java Simon JDBC proxy driver is used * over original JDBC driver (eg. Oracle, PostgreSQL, MySQL etc.). For more details how to do * that, please look at {@link org.javasimon.jdbc4.Driver} a package {@link org.javasimon.jdbc4} * javadoc. * * @author Radovan Sninsky * @author Richard "Virgo" Richter * @see JdbcMXBeanImpl * @since 2 */ public interface JdbcMXBean { /** * Returns actual prefix associated with mxbean. * * @return actual prefix */ String getPrefix(); /** * Sets custom prefix of JDBC Simon hierarchy, see more {@link JdbcMXBean}. * * @param value new prefix */ void setPrefix(String value); /** * Enables monitoring (gathering statistics) by associated JDBC Simon hierarchy, see * ({@code org.javasimon.jdbc}). Works if SimonManager is enabled, look * {@link org.javasimon.SimonManager#isEnabled()}. */ void enableMonitoring(); /** * Disables monitoring (gathering statistics) by associated JDBC Simon hierarchy, see * ({@code org.javasimon.jdbc}). If SimonManager is already disabled has no effect, * look {@link org.javasimon.SimonManager#disable()}. */ void disableMonitoring(); /** * Returns state of monitoring JDBC driver. * * @return {@code true} if associated prefix is enabled; otherwise {@code false} */ boolean isMonitoringEnabled(); /** * Retrieves summary data about JDBC connection objects. * * @return value object {@link JdbcObjectInfo} */ JdbcObjectInfo connectionsStat(); /** * Retrieves summary data about JDBC statement objects. * * @return value object {@link JdbcObjectInfo} */ JdbcObjectInfo statementsStat(); /** * Retrieves summary data about JDBC result set objects. * * @return value object {@link JdbcObjectInfo} */ JdbcObjectInfo resultsetsStat(); /** * Returns SQL command types ({@code select}, {@code insert}, {@code delete}, etc). * If client application uses DDL commands like {@code create}, {@code alter} and other, * those are included too. Special case are batch-es, they are referenced as {@code batch}. * * @return list of string (references to used SQL command types in monitored (simoned) application) * @see #getSqlCommandStat(String) * @see #getSqls(String) */ String[] getSqlCommands(); /** * Retrieves summary data about all executed SQL commands of eneterd type (for instance * summary data of all executed selects). * * @param cmd SQL command type * @return populated object {@link org.javasimon.jmx.StopwatchSample}, or {@code null} if * entered sql command type has no associated javasimon (it means, no sql of this type was * executed yet, for instance no update was executed yet) * @see #connectionsStat() */ StopwatchSample getSqlCommandStat(String cmd); /** * Returns hashs of different SQL commands of one type ({@code select}, {@code insert}, * {@code delete}, etc). Each hash represent one sql command with (and its many executions). * * @param cmd cmd SQL command type ({@code select}, {@code insert}, {@code delete}, etc) * @return list of string (hash references to used SQL command in monitored (simoned) application) * @see #getSqlCommands() * @see #getSqlStat(String) */ String[] getSqls(String cmd); /** * Retrieves summary data about all same executed SQLs (for instance * summary data of all executed {@code select * from foo where bar => 0}). * * @param sql hash code of sql command * @return populated object {@link org.javasimon.jmx.StopwatchSample}, or {@code null} if * entered sql has no associated javasimon (it means, no sql like this was executed yet, * for instance no update was executed yet) * @see #getSqls(String) */ StopwatchSample getSqlStat(String sql); }





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