org.apache.activemq.transport.vm

Class VMTransport

java.lang.Object

org.apache.activemq.transport.vm.VMTransport

All Implemented Interfaces:

Service, Task, Transport

public class VMTransport
extends Object
implements Transport, Task

A Transport implementation that uses direct method invocations.

Field Summary

Fields

Modifier and Type	Field and Description
protected boolean	async
protected int	asyncQueueDepth
protected AtomicBoolean	disposed
protected long	id
protected URI	location
protected static org.slf4j.Logger	LOG
protected boolean	marshal
protected VMTransport	peer
protected AtomicBoolean	started
protected TransportListener	transportListener

Constructor Summary

Constructors

Constructor and Description
VMTransport(URI location)

Method Summary

Modifier and Type	Method and Description
FutureResponse	asyncRequest(Object command, ResponseCallback responseCallback) An asynchronous request response where the Receipt will be returned in the future.
void	dispatch(VMTransport transport, BlockingQueue<Object> pending, Object command)
void	doDispatch(VMTransport transport, TransportListener transportListener, Object command)
int	getAsyncQueueDepth()
LinkedBlockingQueue<Object>	getMessageQueue()
int	getReceiveCounter() Returns a counter which gets incremented as data is read from the transport.
String	getRemoteAddress()
protected TaskRunner	getTaskRunner()
TransportListener	getTransportListener() Returns the current transport listener
boolean	isAsync()
boolean	isConnected()
boolean	isDisposed()
boolean	isFaultTolerant() Indicates if the transport can handle faults
boolean	isMarshal()
boolean	isReconnectSupported()
boolean	isUpdateURIsSupported()
boolean	iterate()
<T> T	narrow(Class<T> target)
void	oneway(Object command) A one way asynchronous send
void	reconnect(URI uri) reconnect to another location
Object	request(Object command) A synchronous request response
Object	request(Object command, int timeout) A synchronous request response
void	setAsync(boolean async)
void	setAsyncQueueDepth(int asyncQueueDepth)
void	setMarshal(boolean marshal)
void	setPeer(VMTransport peer)
void	setTransportListener(TransportListener commandListener) Registers an inbound command listener
void	start()
void	stop()
String	toString()
void	updateURIs(boolean reblance, URI[] uris) Provide a list of available alternative locations
protected void	wakeup()

Methods inherited from class java.lang.Object

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

Field Detail

LOG

protected static final org.slf4j.Logger LOG

peer

protected VMTransport peer

transportListener

protected TransportListener transportListener

marshal

protected boolean marshal

async

protected boolean async

asyncQueueDepth

protected int asyncQueueDepth

location

protected final URI location

id

protected final long id

started

protected final AtomicBoolean started

disposed

protected final AtomicBoolean disposed

Constructor Detail

VMTransport

public VMTransport(URI location)

Method Detail

setPeer

public void setPeer(VMTransport peer)

oneway

public void oneway(Object command)
            throws IOException

Description copied from interface: Transport

A one way asynchronous send

Specified by:

oneway in interface Transport

Throws:

IOException

dispatch

public void dispatch(VMTransport transport,
                     BlockingQueue<Object> pending,
                     Object command)

doDispatch

public void doDispatch(VMTransport transport,
                       TransportListener transportListener,
                       Object command)

start

public void start()
           throws Exception

Specified by:

start in interface Service

Throws:

Exception

stop

public void stop()
          throws Exception

Specified by:

stop in interface Service

Throws:

Exception

wakeup

protected void wakeup()

iterate

public boolean iterate()

Specified by:

iterate in interface Task

See Also:

Task.iterate()

setTransportListener

public void setTransportListener(TransportListener commandListener)

Description copied from interface: Transport

Registers an inbound command listener

Specified by:

setTransportListener in interface Transport

getMessageQueue

public LinkedBlockingQueue<Object> getMessageQueue()
                                            throws TransportDisposedIOException

Throws:

TransportDisposedIOException

getTaskRunner

protected TaskRunner getTaskRunner()
                            throws TransportDisposedIOException

Throws:

TransportDisposedIOException

asyncRequest

public FutureResponse asyncRequest(Object command,
                                   ResponseCallback responseCallback)
                            throws IOException

Description copied from interface: Transport

An asynchronous request response where the Receipt will be returned in the future. If responseCallback is not null, then it will be called when the response has been completed.

Specified by:

asyncRequest in interface Transport

responseCallback - TODO

Returns:

the FutureResponse

Throws:

IOException

request

public Object request(Object command)
               throws IOException

Description copied from interface: Transport

A synchronous request response

Specified by:

request in interface Transport

Returns:

the response

Throws:

IOException

request

public Object request(Object command,
                      int timeout)
               throws IOException

Description copied from interface: Transport

A synchronous request response

Specified by:

request in interface Transport

Returns:

the repsonse or null if timeout

Throws:

IOException

getTransportListener

public TransportListener getTransportListener()

Description copied from interface: Transport

Returns the current transport listener

Specified by:

getTransportListener in interface Transport

Returns:

narrow

public <T> T narrow(Class<T> target)

Specified by:

narrow in interface Transport

Returns:

the target

isMarshal

public boolean isMarshal()

setMarshal

public void setMarshal(boolean marshal)

toString

public String toString()

Overrides:

toString in class Object

getRemoteAddress

public String getRemoteAddress()

Specified by:

getRemoteAddress in interface Transport

Returns:

the remote address for this connection

isAsync

public boolean isAsync()

Returns:

the async

setAsync

public void setAsync(boolean async)

Parameters:

async - the async to set

getAsyncQueueDepth

public int getAsyncQueueDepth()

Returns:

the asyncQueueDepth

setAsyncQueueDepth

public void setAsyncQueueDepth(int asyncQueueDepth)

Parameters:

asyncQueueDepth - the asyncQueueDepth to set

isFaultTolerant

public boolean isFaultTolerant()

Description copied from interface: Transport

Indicates if the transport can handle faults

Specified by:

isFaultTolerant in interface Transport

Returns:

true if fault tolerant

isDisposed

public boolean isDisposed()

Specified by:

isDisposed in interface Transport

Returns:

true if the transport is disposed

isConnected

public boolean isConnected()

Specified by:

isConnected in interface Transport

Returns:

true if the transport is connected

reconnect

public void reconnect(URI uri)
               throws IOException

Description copied from interface: Transport

reconnect to another location

Specified by:

reconnect in interface Transport

Throws:

IOException - on failure of if not supported

isReconnectSupported

public boolean isReconnectSupported()

Specified by:

isReconnectSupported in interface Transport

Returns:

true if reconnect is supported

isUpdateURIsSupported

public boolean isUpdateURIsSupported()

Specified by:

isUpdateURIsSupported in interface Transport

Returns:

true if updating uris is supported

updateURIs

public void updateURIs(boolean reblance,
                       URI[] uris)
                throws IOException

Description copied from interface: Transport

Provide a list of available alternative locations

Specified by:

updateURIs in interface Transport

Throws:

IOException

getReceiveCounter

public int getReceiveCounter()

Description copied from interface: Transport

Returns a counter which gets incremented as data is read from the transport. It should only be used to determine if there is progress being made in reading the next command from the transport. The value may wrap into the negative numbers.

Specified by:

getReceiveCounter in interface Transport

Returns:

a counter which gets incremented as data is read from the transport.