Module openj9.dtfjview

Package com.ibm.jvm.dtfjview

Class CombinedContext

java.lang.Object

com.ibm.java.diagnostics.utils.Context

com.ibm.java.diagnostics.utils.DTFJContext

com.ibm.jvm.dtfjview.CombinedContext

All Implemented Interfaces:

IContext, IDTFJContext, PluginLoader, ICombinedContext

public class CombinedContext
extends DTFJContext
implements ICombinedContext

Wrapper class that takes an existing DTFJ context and augments it with a DDR interactive context if one exists.

Field Summary

Fields declared in class com.ibm.java.diagnostics.utils.Context

commands, globalCommands, lastException, lastExecutedCommand, loader

Constructor Summary

Constructors

Constructor	Description
CombinedContext(int major, int minor, Image image, ImageAddressSpace space, ImageProcess proc, JavaRuntime rt, int id)

Method Summary

Modifier and Type	Method	Description
void	displayContext(IOutputManager out, boolean shortFormat)	Display the contexts which are present in the core file currently being analysed.
void	execute(CommandParser command, PrintStream out)	Execute the entered command line with the output sent to the supplied print stream.
void	execute(String cmdline, PrintStream out)	Execute the entered command line with the output sent to the supplied print stream.
void	execute(String cmdline, String[] arguments, PrintStream out)	Execute the entered command line with the output sent to the supplied print stream.
Object	getDDRIObject()	A handle to the underlying DDR interactive session
Throwable	getDDRStartupException()	Get the exception which was thrown when trying to start a DDR interactive session.
int	getID()	Contexts have a unique positive numeric identifier within a session.
boolean	isDDRAvailable()	Flag to indicate if an associated DDR context is available as well as the DTFJ one.
void	setAsCurrent()	Called when this context becomes the current context to allow any initialisation to take place.
void	setID(int id)	Sets the numeric ID for this context.
void	startDDRInteractiveSession(Image image, PrintStream out)	Starts a DDR interactive session using the loaded image.

Methods declared in class com.ibm.java.diagnostics.utils.DTFJContext

getAddressSpace, getImage, getMajorVersion, getMinorVersion, getPluginClassloader, getPluginFailures, getPlugins, getProcess, getProperties, getRuntime, hasPropertyBeenSet, loadPlugins, refresh

Methods declared in class com.ibm.java.diagnostics.utils.Context

addGlobalCommandsToContext, execute, execute, execute, getCommandNames, getCommands, getLastCommandException, getLastExecutedCommand, getPluginManager, isCommandRecognised

Methods declared in class java.lang.Object

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

Methods declared in interface com.ibm.java.diagnostics.utils.IContext

getCommands, getLastCommandException, getLastExecutedCommand, getPluginClassloader, getProperties, isCommandRecognised, refresh

Methods declared in interface com.ibm.java.diagnostics.utils.IDTFJContext

getAddressSpace, getImage, getMajorVersion, getMinorVersion, getProcess, getRuntime, hasPropertyBeenSet

Constructor Details

CombinedContext

public CombinedContext(int major,
 int minor,
 Image image,
 ImageAddressSpace space,
 ImageProcess proc,
 JavaRuntime rt,
 int id)

Method Details

getID

public int getID()

Description copied from interface: ICombinedContext

Contexts have a unique positive numeric identifier within a session. This number always increases if new contexts are created via the open command rather than attempting to re-use any already used IDs.

Specified by:

getID in interface ICombinedContext

Returns:

the ID for this context

setID

public void setID(int id)

Description copied from interface: ICombinedContext

Sets the numeric ID for this context. This setter is provided so as to allow context creation before assigning the ID. However once set it should not be changed. Later implementations may enforce this.

Specified by:

setID in interface ICombinedContext

Parameters:

id - the context ID

execute

public void execute(String cmdline,
 String[] arguments,
 PrintStream out)

Description copied from interface: IContext

Execute the entered command line with the output sent to the supplied print stream.

Specified by:

execute in interface IContext

Parameters:

cmdline - line to execute

out - where to write the output to

execute

public void execute(String cmdline,
 PrintStream out)

Description copied from interface: IContext

Execute the entered command line with the output sent to the supplied print stream.

Specified by:

execute in interface IContext

Parameters:

cmdline - line to execute

out - where to write the output to

execute

public void execute(CommandParser command,
 PrintStream out)

Description copied from interface: IContext

Execute the entered command line with the output sent to the supplied print stream.

Specified by:

execute in interface IContext

startDDRInteractiveSession

public void startDDRInteractiveSession(Image image,
 PrintStream out)

Starts a DDR interactive session using the loaded image. If the core file is not DDR enabled this is recorded and future pling commands will not be available. In order to get access to the DDR classes it uses the Image classloader which, if the core file is DDR enabled, can see the required classes.

Parameters:

image - Image created from the core file

getDDRIObject

public Object getDDRIObject()

Description copied from interface: ICombinedContext

A handle to the underlying DDR interactive session

Specified by:

getDDRIObject in interface ICombinedContext

Returns:

a valid session or null if the core file is not DDR enabled

getDDRStartupException

public Throwable getDDRStartupException()

Description copied from interface: ICombinedContext

Get the exception which was thrown when trying to start a DDR interactive session.

Specified by:

getDDRStartupException in interface ICombinedContext

Returns:

the exception or null if the session started without error.

displayContext

public void displayContext(IOutputManager out,
 boolean shortFormat)

Description copied from interface: ICombinedContext

Display the contexts which are present in the core file currently being analysed.

Specified by:

displayContext in interface ICombinedContext

shortFormat - true for short format which just displays the first line of the java -version string

setAsCurrent

public void setAsCurrent()

Description copied from interface: ICombinedContext

Called when this context becomes the current context to allow any initialisation to take place.

Specified by:

setAsCurrent in interface ICombinedContext

isDDRAvailable

public boolean isDDRAvailable()

Description copied from interface: ICombinedContext

Flag to indicate if an associated DDR context is available as well as the DTFJ one.

Specified by:

isDDRAvailable in interface ICombinedContext

Returns:

true if DDR is available