Package org.apache.commons.exec
Class ShutdownHookProcessDestroyer
- java.lang.Object
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- org.apache.commons.exec.ShutdownHookProcessDestroyer
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- All Implemented Interfaces:
java.lang.Runnable
,ProcessDestroyer
public class ShutdownHookProcessDestroyer extends java.lang.Object implements ProcessDestroyer, java.lang.Runnable
Destroys all registeredProcess
es when the VM exits.
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Constructor Summary
Constructors Constructor Description ShutdownHookProcessDestroyer()
Constructs aProcessDestroyer
and obtainsRuntime.addShutdownHook()
andRuntime.removeShutdownHook()
through reflection.
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Method Summary
All Methods Instance Methods Concrete Methods Modifier and Type Method Description boolean
add(java.lang.Process process)
Returnstrue
if the specifiedProcess
was successfully added to the list of processes to destroy upon VM exit.boolean
isAddedAsShutdownHook()
Returns whether or not the ProcessDestroyer is registered as as shutdown hookboolean
remove(java.lang.Process process)
Returnstrue
if the specifiedProcess
was successfully removed from the list of processes to destroy upon VM exit.void
run()
Invoked by the VM when it is exiting.int
size()
Returns the number of registered processes.
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Constructor Detail
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ShutdownHookProcessDestroyer
public ShutdownHookProcessDestroyer()
Constructs aProcessDestroyer
and obtainsRuntime.addShutdownHook()
andRuntime.removeShutdownHook()
through reflection. The ProcessDestroyer manages a list of processes to be destroyed when the VM exits. If a process is added when the list is empty, thisProcessDestroyer
is registered as a shutdown hook. If removing a process results in an empty list, theProcessDestroyer
is removed as a shutdown hook.
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Method Detail
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isAddedAsShutdownHook
public boolean isAddedAsShutdownHook()
Returns whether or not the ProcessDestroyer is registered as as shutdown hook- Returns:
- true if this is currently added as shutdown hook
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add
public boolean add(java.lang.Process process)
Returnstrue
if the specifiedProcess
was successfully added to the list of processes to destroy upon VM exit.- Specified by:
add
in interfaceProcessDestroyer
- Parameters:
process
- the process to add- Returns:
true
if the specifiedProcess
was successfully added
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remove
public boolean remove(java.lang.Process process)
Returnstrue
if the specifiedProcess
was successfully removed from the list of processes to destroy upon VM exit.- Specified by:
remove
in interfaceProcessDestroyer
- Parameters:
process
- the process to remove- Returns:
true
if the specifiedProcess
was successfully removed
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size
public int size()
Returns the number of registered processes.- Specified by:
size
in interfaceProcessDestroyer
- Returns:
- the number of register process
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run
public void run()
Invoked by the VM when it is exiting.- Specified by:
run
in interfacejava.lang.Runnable
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