org.apache.openjpa.lib.instrumentation

Class AbstractInstrument

java.lang.Object

org.apache.openjpa.lib.instrumentation.AbstractInstrument

All Implemented Interfaces:

Instrument

Direct Known Subclasses:

AbstractDataCacheInstrument, AbstractPreparedQueryCacheInstrument, AbstractQueryCacheInstrument

public abstract class AbstractInstrument
extends Object
implements Instrument

Provides a base for creating instruments. Specialized instruments can extend this class to get base instrument capabilities and then add their own specialized functionality.

Constructor Summary

Constructors

Constructor and Description
AbstractInstrument()

Method Summary

Modifier and Type	Method and Description
Object	getContext() Gets the context of the instrument.
InstrumentationLevel	getLevel() Gets the instrumentation level of this instrument.
abstract String	getName() Returns the name of the instrument.
String	getOptions() Returns the options specified for the instrument in string form.
InstrumentationProvider	getProvider() Gets the instrumentation provider for the instrument.
abstract void	initialize() Initializes the instrument.
boolean	isStarted() Returns true if the instrument is started.
void	restart() Restarts the instrument.
void	setContext(Object context) Sets the context of the instrument.
void	setOptions(String options) Sets options to specify for the instrument in standard string form.
void	setProvider(InstrumentationProvider provider) Sets the instrumentation provider for the instrument.
void	setStarted(boolean started) Sets whether the instrument is an available state.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Methods inherited from interface org.apache.openjpa.lib.instrumentation.Instrument

start, stop

Constructor Detail

AbstractInstrument

public AbstractInstrument()

Method Detail

getContext

public Object getContext()

Description copied from interface: Instrument

Gets the context of the instrument. Typically, a reference to a broker or broker factory.

Specified by:

getContext in interface Instrument

Returns:

the context associated with the instrument.

setContext

public void setContext(Object context)

Description copied from interface: Instrument

Sets the context of the instrument. Typically, a reference to a broker or broker factory.

Specified by:

setContext in interface Instrument

getOptions

public String getOptions()

Description copied from interface: Instrument

Returns the options specified for the instrument in string form.

Specified by:

getOptions in interface Instrument

Returns:

options configuration options for the instrument

setOptions

public void setOptions(String options)

Description copied from interface: Instrument

Sets options to specify for the instrument in standard string form. ex. DataCache(Options='Start=true')

Specified by:

setOptions in interface Instrument

Parameters:

options - options

isStarted

public boolean isStarted()

Description copied from interface: Instrument

Returns true if the instrument is started.

Specified by:

isStarted in interface Instrument

setStarted

public void setStarted(boolean started)

Description copied from interface: Instrument

Sets whether the instrument is an available state.

Specified by:

setStarted in interface Instrument

restart

public void restart()

Description copied from interface: Instrument

Restarts the instrument. Typically this will be performed through the provider, but in some cases an instrument will have its own specialized restart.

Specified by:

restart in interface Instrument

setProvider

public void setProvider(InstrumentationProvider provider)

Description copied from interface: Instrument

Sets the instrumentation provider for the instrument.

Specified by:

setProvider in interface Instrument

Parameters:

provider - instrumentation provider of the instrument

getProvider

public InstrumentationProvider getProvider()

Description copied from interface: Instrument

Gets the instrumentation provider for the instrument.

Specified by:

getProvider in interface Instrument

Returns:

instrumentation provider of the instrument

getLevel

public InstrumentationLevel getLevel()

Description copied from interface: Instrument

Gets the instrumentation level of this instrument. The instrumentation level determines if and when the instrument will automatically start and stop.

Specified by:

getLevel in interface Instrument

Returns:

the instrumentation level of the instrument

getName

public abstract String getName()

Description copied from interface: Instrument

Returns the name of the instrument. Must be unique per-provider.

Specified by:

getName in interface Instrument

initialize

public abstract void initialize()

Description copied from interface: Instrument

Initializes the instrument. Depending on the instrument, the provider, options, and various options may need to be set before calling this method.

Specified by:

initialize in interface Instrument