|
Java Debug Interface | |||||||||
PREV CLASS NEXT CLASS | FRAMES NO FRAMES | |||||||||
SUMMARY: NESTED | FIELD | CONSTR | METHOD | DETAIL: FIELD | CONSTR | METHOD |
A manager of connections to target virtual machines. The
VirtualMachineManager allows one application to debug
multiple target VMs. (Note that the converse is not
supported; a target VM can be debugged by only one
debugger application.) This interface
contains methods to manage connections
to remote target VMs and to obtain the VirtualMachine
mirror for available target VMs.
Connections can be made using one of several different
Connector
objects. Each connector encapsulates
a different way of connecting the debugger with a target VM.
The VirtualMachineManager supports many different scenarios for
connecting a debugger to a virtual machine. Four examples
are presented in the table below. The
examples use the command line syntax in Sun's classic VM.
Some Connector
implementations may require slightly
different handling than presented below.
Scenario | Description |
---|---|
Debugger launches target VM (simplest, most-common scenario) | Debugger calls the
LaunchingConnector.launch(java.util.Map)
method of the default connector, obtained with defaultConnector() . The
target VM is launched, and a connection between that VM and the
debugger is established. A VirtualMachine mirror is returned.
Or, for more control
|
Debugger attaches to previously-running VM |
|
Target VM attaches to previously-running debugger |
listeningConnectors() for one or more
transports.ListeningConnector.startListening(java.util.Map) method for each selected
connector. For each call, a transport-specific address string is
generated and returned. The debugger makes the transport names and
corresponding address strings available to the end user.
ListeningConnector.accept(java.util.Map)
for each selected connector to wait for
a target VM to connect.-Xrunjdwp:transport=xxx,address=yyy -Xdebug -Xnoagent -Djava.compiler=NONE
where "xxx" the transport for one of the connectors selected by the
the debugger and "yyy"
is the address generated by
ListeningConnector.accept(java.util.Map) for that
transport.ListeningConnector.accept(java.util.Map) returns
a VirtualMachine mirror. |
Target VM launches debugger (sometimes called "Just-In-Time" debugging) |
-Xrunjdwp:launch=cmdline,onuncaught=y,transport=xxx,server=y
attachingConnectors() matching the transport with
the name "xxx".
Connector.defaultArguments() ) to specify
the transport specific address at which the VM is listenig. Optionally,
other connector arguments can be presented to the user.
AttachingConnector.attach(java.util.Map) method
of the selected to attach to the target VM. A VirtualMachine
mirror is returned.
|
Method Summary | |
List |
allConnectors()
Returns the list of all known Connector objects. |
List |
attachingConnectors()
Returns the list of known AttachingConnector objects. |
List |
connectedVirtualMachines()
Lists all target VMs which are connected to the debugger. |
LaunchingConnector |
defaultConnector()
Identifies the default connector. |
List |
launchingConnectors()
Returns the list of known LaunchingConnector objects. |
List |
listeningConnectors()
Returns the list of known ListeningConnector objects. |
int |
majorInterfaceVersion()
Returns the major version number of the JDI interface. |
int |
minorInterfaceVersion()
Returns the minor version number of the JDI interface. |
Method Detail |
public LaunchingConnector defaultConnector()
LaunchingConnector
public List launchingConnectors()
LaunchingConnector
objects.
Any of the returned objects can be used to launch a new target
VM and immediately create a VirtualMachine
mirror for it.
Note that a target VM launched by a launching connector is not
guaranteed to be stable until after the VMStartEvent
has been
received.
LaunchingConnector
objects.public List attachingConnectors()
AttachingConnector
objects.
Any of the returned objects can be used to attach to an existing target
VM and create a VirtualMachine
mirror for it.
AttachingConnector
objects.public List listeningConnectors()
ListeningConnector
objects.
Any of the returned objects can be used to listen for a
connection initiated by a target VM
and create a VirtualMachine
mirror for it.
ListeningConnector
objects.public List allConnectors()
public List connectedVirtualMachines()
VirtualMachine
instances for
any target VMs which initiated a connection
and any
target VMs to which this manager has initiated a connection.
A target VM will remain in this list
until the VM is disconnected.
VMDisconnectEvent
is placed in the event queue
after the VM is removed from the list.
VirtualMachine
objects, each mirroring
a target VM.public int majorInterfaceVersion()
VirtualMachine.version()
target VM version and
information and
VirtualMachine.description()
more version information.
public int minorInterfaceVersion()
VirtualMachine.version()
target VM version and
information and
VirtualMachine.description()
more version information.
|
Java Debug Interface | |||||||||
PREV CLASS NEXT CLASS | FRAMES NO FRAMES | |||||||||
SUMMARY: NESTED | FIELD | CONSTR | METHOD | DETAIL: FIELD | CONSTR | METHOD |