public class ProtocolStack extends Protocol
The ProtocolStack makes use of the Configurator to setup and initialize stacks, and to destroy them again when not needed anymore
Modifier and Type | Class and Description |
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static class |
ProtocolStack.RefCounter
Keeps track of the number os times init()/destroy() and start()/stop have been called.
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Constructor and Description |
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ProtocolStack()
Used for programmatic creation of ProtocolStack
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ProtocolStack(JChannel channel) |
Modifier and Type | Method and Description |
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ProtocolStack |
addProtocol(Protocol prot)
Adds a protocol at the tail of the protocol list
|
ProtocolStack |
addProtocols(List<Protocol> prots)
Adds a list of protocols
|
ProtocolStack |
addProtocols(Protocol... prots)
Adds a list of protocols
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List<Protocol> |
copyProtocols(ProtocolStack targetStack) |
protected Protocol |
createProtocol(String classname) |
void |
destroy()
This method is called on a
Channel.close() . |
Object |
down(Event evt)
An event is to be sent down the stack.
|
Map<String,Object> |
dumpStats() |
Map<String,Object> |
dumpStats(String protocol_name) |
Map<String,Object> |
dumpStats(String protocol_name,
List<String> attrs) |
Protocol |
findProtocol(Class<?>... classes)
Finds the first protocol of a list and returns it.
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Protocol |
findProtocol(Class<?> clazz) |
Protocol |
findProtocol(String name)
Returns a given protocol or null if not found
|
Protocol |
getBottomProtocol() |
JChannel |
getChannel() |
String |
getName()
All protocol names have to be unique !
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List<Protocol> |
getProtocols()
Returns all protocols in a list, from top to bottom.
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static ConcurrentMap<String,Tuple<TP,ProtocolStack.RefCounter>> |
getSingletonTransports() |
Protocol |
getTopProtocol() |
TP |
getTransport()
Returns the bottom most protocol
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void |
init()
Called after instance has been created (null constructor) and before protocol is started.
|
void |
initProtocolStack() |
void |
insertProtocol(Protocol prot,
int position,
Class<? extends Protocol>... neighbor_prots) |
void |
insertProtocol(Protocol prot,
int position,
Class<? extends Protocol> neighbor_prot) |
void |
insertProtocol(Protocol prot,
int position,
String neighbor_prot)
Inserts an already created (and initialized) protocol into the protocol list.
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void |
insertProtocolAtTop(Protocol prot) |
void |
insertProtocolInStack(Protocol prot,
Protocol neighbor,
int position) |
String |
printProtocolSpec(boolean include_properties)
Prints the names of the protocols, from the bottom to top.
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String |
printProtocolSpecAsPlainString() |
String |
printProtocolSpecAsXML() |
Object |
receive(long timeout) |
Protocol |
removeProtocol(Class... protocols) |
Protocol |
removeProtocol(Class prot) |
Protocol |
removeProtocol(String prot_name)
Removes a protocol from the stack.
|
void |
replaceProtocol(Protocol existing_prot,
Protocol new_prot)
Replaces one protocol instance with another.
|
void |
send(Message msg) |
void |
setChannel(JChannel ch) |
void |
setup(List<ProtocolConfiguration> configs) |
void |
setup(ProtocolStack stack) |
void |
startStack(String cluster_name,
Address local_addr)
Start all layers.
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void |
stopStack(String cluster_name)
Iterates through all the protocols from top to bottom and does the following:
Waits until all messages in the down queue have been flushed (ie., size is 0)
Calls stop() on the protocol
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Object |
up(Event evt)
An event was received from the layer below.
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enableStats, getConfigurableObjects, getDownProtocol, getId, getLevel, getProtocolStack, getSocketFactory, getThreadFactory, getUpProtocol, getValue, isErgonomics, printStats, providedDownServices, providedUpServices, requiredDownServices, requiredUpServices, resetStatistics, resetStats, setDownProtocol, setErgonomics, setId, setLevel, setProtocolStack, setSocketFactory, setUpProtocol, setValue, setValues, start, statsEnabled, stop
public static final int ABOVE
public static final int BELOW
public ProtocolStack()
public JChannel getChannel()
public void setChannel(JChannel ch)
public List<Protocol> getProtocols()
public List<Protocol> copyProtocols(ProtocolStack targetStack) throws IllegalAccessException, InstantiationException
public TP getTransport()
getTransport
in class Protocol
public static ConcurrentMap<String,Tuple<TP,ProtocolStack.RefCounter>> getSingletonTransports()
public String printProtocolSpec(boolean include_properties)
public String printProtocolSpecAsXML()
public String printProtocolSpecAsPlainString()
public void setup(List<ProtocolConfiguration> configs) throws Exception
Exception
public void setup(ProtocolStack stack) throws Exception
Exception
public ProtocolStack addProtocol(Protocol prot)
prot
- public ProtocolStack addProtocols(Protocol... prots)
prots
- public ProtocolStack addProtocols(List<Protocol> prots)
prots
- public void insertProtocol(Protocol prot, int position, String neighbor_prot) throws Exception
prot
- The protocol to be inserted. Before insertion, a sanity check will ensure that none
of the existing protocols have the same name as the new protocol.position
- Where to place the protocol with respect to the neighbor_prot (ABOVE, BELOW)neighbor_prot
- The name of the neighbor protocol. An exception will be thrown if this name
is not foundException
- Will be thrown when the new protocol cannot be created, or inserted.public void insertProtocolInStack(Protocol prot, Protocol neighbor, int position)
public void insertProtocol(Protocol prot, int position, Class<? extends Protocol> neighbor_prot) throws Exception
Exception
public void insertProtocol(Protocol prot, int position, Class<? extends Protocol>... neighbor_prots) throws Exception
Exception
public void insertProtocolAtTop(Protocol prot)
public Protocol removeProtocol(String prot_name) throws Exception
prot_name
- The name of the protocol. Since all protocol names in a stack have to be unique
(otherwise the stack won't be created), the name refers to just 1 protocol.Exception
- Thrown if the protocol cannot be stopped correctly.public Protocol findProtocol(String name)
public Protocol getBottomProtocol()
public Protocol getTopProtocol()
public Protocol findProtocol(Class<?>... classes)
classes
- A list of protocol classes to findpublic void replaceProtocol(Protocol existing_prot, Protocol new_prot) throws Exception
existing_prot
- new_prot
- Exception
protected Protocol createProtocol(String classname) throws Exception
Exception
public void init() throws Exception
Protocol
public void destroy()
Protocol
Channel.close()
.
Does some cleanup; after the call the VM will terminatepublic void startStack(String cluster_name, Address local_addr) throws Exception
Protocol.start()
method is called in each protocol,
from top to bottom.
Each layer can perform some initialization, e.g. create a multicast socketException
public void stopStack(String cluster_name)
public String getName()
Protocol
public Object up(Event evt)
Protocol
down_prot.down()
or c) the event (or another event) is sent up
the stack using up_prot.up()
.public Object down(Event evt)
Protocol
down_prot.down()
. In case of a GET_ADDRESS event (which tries to
retrieve the stack's address from one of the bottom layers), the layer may need to send
a new response event back up the stack using up_prot.up()
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