com.fr.third.jgroups.tests

类 LargeState

java.lang.Object

com.fr.third.jgroups.ReceiverAdapter

com.fr.third.jgroups.tests.LargeState

所有已实现的接口:

MembershipListener, MessageListener, Receiver

public class LargeState
extends ReceiverAdapter

Tests transfer of large states. Start first instance with -provider flag and -size flag (default = 1MB). The start second instance without these flags: it should acquire the state from the first instance. Possibly tracing should be turned on for FRAG to see the fragmentation taking place, e.g.:

 trace1=FRAG DEBUG STDOUT
 

Note that because fragmentation might generate a lot of small fragments at basically the same time (e.g. size1MB, FRAG.frag-size=4096 generates a lot of fragments), the send buffer of the unicast socket in UDP might be overloaded, causing it to drop some packets (default size is 8096 bytes). Therefore the send (and receive) buffers for the unicast socket have been increased (see ucast_send_buf_size and ucast_recv_buf_size below).

If we didn't do this, we would have some retransmission, slowing the state transfer down.

作者:

Bela Ban Dec 13 2001

构造器概要

构造器

构造器和说明
LargeState()

方法概要

方法

限定符和类型	方法和说明
void	getState(java.io.OutputStream ostream) Allows an application to write a state through a provided OutputStream.
static void	main(java.lang.String[] args)
void	receive(Message msg) Called when a message is received.
void	setState(java.io.InputStream istream) Allows an application to read a state through a provided InputStream.
void	start(boolean provider, int size, java.lang.String props, boolean provider_fails, boolean requester_fails, long delay, java.lang.String name)
void	viewAccepted(View new_view) Called when a change in membership has occurred.

从类继承的方法 com.fr.third.jgroups.ReceiverAdapter

block, suspect, unblock

从类继承的方法 java.lang.Object

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

构造器详细资料

LargeState

public LargeState()

方法详细资料

start

public void start(boolean provider,
         int size,
         java.lang.String props,
         boolean provider_fails,
         boolean requester_fails,
         long delay,
         java.lang.String name)
           throws java.lang.Exception

抛出:

java.lang.Exception

receive

public void receive(Message msg)

从类复制的说明: ReceiverAdapter

Called when a message is received.

指定者:

receive 在接口中 MessageListener

覆盖:

receive 在类中 ReceiverAdapter

viewAccepted

public void viewAccepted(View new_view)

从类复制的说明: ReceiverAdapter

Called when a change in membership has occurred. No long running actions, sending of messages or anything that could block should be done in this callback. If some long running action needs to be performed, it should be done in a separate thread.

Note that on reception of the first view (a new member just joined), the channel will not yet be in the connected state. This only happens when Channel.connect(String) returns.

指定者:

viewAccepted 在接口中 MembershipListener

覆盖:

viewAccepted 在类中 ReceiverAdapter

setState

public void setState(java.io.InputStream istream)
              throws java.lang.Exception

从类复制的说明: ReceiverAdapter

Allows an application to read a state through a provided InputStream. After the state has been read the InputStream doesn't need to be closed as stream closing is automatically done when a calling thread returns from this callback.

指定者:

setState 在接口中 MessageListener

覆盖:

setState 在类中 ReceiverAdapter

参数:

istream - the InputStream

抛出:

java.lang.Exception - if the streaming fails, any exceptions should be thrown so that the state requester can catch them and thus know what happened

另请参阅:

InputStream.close()

getState

public void getState(java.io.OutputStream ostream)
              throws java.lang.Exception

从类复制的说明: ReceiverAdapter

Allows an application to write a state through a provided OutputStream. After the state has been written the OutputStream doesn't need to be closed as stream closing is automatically done when a calling thread returns from this callback.

指定者:

getState 在接口中 MessageListener

覆盖:

getState 在类中 ReceiverAdapter

参数:

ostream - the OutputStream

抛出:

java.lang.Exception - if the streaming fails, any exceptions should be thrown so that the state requester can re-throw them and let the caller know what happened

另请参阅:

OutputStream.close()

main

public static void main(java.lang.String[] args)