Package org.jgroups.protocols
Class BSH
- java.lang.Object
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- org.jgroups.stack.Protocol
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- org.jgroups.protocols.BSH
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public class BSH extends Protocol
Beanshell (www.beanshell.org) interpreter class. The eval() method receives Java code, executes it and returns the result of the evaluation (or an exception). User: Bela Date: Mar 8, 2003 Time: 1:57:07 PM- Author:
- Bela Ban
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Nested Class Summary
Nested Classes Modifier and Type Class Description static class
BSH.BshHeader
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Constructor Summary
Constructors Constructor Description BSH()
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Method Summary
All Methods Instance Methods Concrete Methods Modifier and Type Method Description void
destroy()
This method is called on aChannel.close()
.void
destroyInterpreter()
java.lang.String
getName()
void
init()
Called after instance has been created (null constructor) and before protocol is started.void
start()
This method is called on aChannel.connect(String)
.void
stop()
This method is called on aChannel.disconnect()
.java.lang.Object
up(Event evt)
An event was received from the layer below.-
Methods inherited from class org.jgroups.stack.Protocol
down, downThreadEnabled, dumpStats, enableStats, getDownProtocol, getProperties, getProtocolStack, getThreadFactory, getTransport, getUpProtocol, printStats, providedDownServices, providedUpServices, requiredDownServices, requiredUpServices, resetStats, setDownProtocol, setProperties, setPropertiesInternal, setProtocolStack, setUpProtocol, statsEnabled, upThreadEnabled
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Method Detail
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init
public void init() throws java.lang.Exception
Description copied from class:Protocol
Called after instance has been created (null constructor) and before protocol is started. Properties are already set. Other protocols are not yet connected and events cannot yet be sent.
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start
public void start() throws java.lang.Exception
Description copied from class:Protocol
This method is called on aChannel.connect(String)
. Starts work. Protocols are connected and queues are ready to receive events. Will be called from bottom to top. This call will replace the START and START_OK events.- Overrides:
start
in classProtocol
- Throws:
java.lang.Exception
- Thrown if protocol cannot be started successfully. This will cause the ProtocolStack to fail, soChannel.connect(String)
will throw an exception
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stop
public void stop()
Description copied from class:Protocol
This method is called on aChannel.disconnect()
. Stops work (e.g. by closing multicast socket). Will be called from top to bottom. This means that at the time of the method invocation the neighbor protocol below is still working. This method will replace the STOP, STOP_OK, CLEANUP and CLEANUP_OK events. The ProtocolStack guarantees that when this method is called all messages in the down queue will have been flushed
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destroy
public void destroy()
Description copied from class:Protocol
This method is called on aChannel.close()
. Does some cleanup; after the call the VM will terminate
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up
public java.lang.Object up(Event evt)
Description copied from class:Protocol
An event was received from the layer below. Usually the current layer will want to examine the event type and - depending on its type - perform some computation (e.g. removing headers from a MSG event type, or updating the internal membership list when receiving a VIEW_CHANGE event). Finally the event is either a) discarded, or b) an event is sent down the stack usingdown_prot.down()
or c) the event (or another event) is sent up the stack usingup_prot.up()
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destroyInterpreter
public void destroyInterpreter()
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