org.apache.catalina.tribes.group.interceptors

Class GzipInterceptor

java.lang.Object

org.apache.catalina.tribes.group.ChannelInterceptorBase

org.apache.catalina.tribes.group.interceptors.GzipInterceptor

All Implemented Interfaces:

ChannelInterceptor, Heartbeat, MembershipListener

public class GzipInterceptor
extends ChannelInterceptorBase

Version:

1.0

Nested Class Summary

Nested classes/interfaces inherited from interface org.apache.catalina.tribes.ChannelInterceptor

ChannelInterceptor.InterceptorEvent

Field Summary

Fields

Modifier and Type	Field and Description
static int	DEFAULT_BUFFER_SIZE
protected static StringManager	sm

Fields inherited from class org.apache.catalina.tribes.group.ChannelInterceptorBase

optionFlag

Constructor Summary

Constructors

Constructor and Description
GzipInterceptor()

Method Summary

Modifier and Type	Method and Description
static byte[]	compress(byte[] data)
static byte[]	decompress(byte[] data)
void	messageReceived(ChannelMessage msg) the messageReceived is invoked when a message is received.
void	sendMessage(Member[] destination, ChannelMessage msg, InterceptorPayload payload) The sendMessage method is called when a message is being sent to one more destinations.

Methods inherited from class org.apache.catalina.tribes.group.ChannelInterceptorBase

fireInterceptorEvent, getChannel, getLocalMember, getMember, getMembers, getNext, getOptionFlag, getPrevious, hasMembers, heartbeat, memberAdded, memberDisappeared, okToProcess, setChannel, setNext, setOptionFlag, setPrevious, start, stop

Methods inherited from class java.lang.Object

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

Field Detail

sm

protected static final StringManager sm

DEFAULT_BUFFER_SIZE

public static final int DEFAULT_BUFFER_SIZE

See Also:

Constant Field Values

Constructor Detail

GzipInterceptor

public GzipInterceptor()

Method Detail

sendMessage

public void sendMessage(Member[] destination,
                        ChannelMessage msg,
                        InterceptorPayload payload)
                 throws ChannelException

Description copied from interface: ChannelInterceptor

The sendMessage method is called when a message is being sent to one more destinations. The interceptor can modify any of the parameters and then pass on the message down the stack by invoking getNext().sendMessage(destination,msg,payload)
Alternatively the interceptor can stop the message from being sent by not invoking getNext().sendMessage(destination,msg,payload)
If the message is to be sent asynchronous the application can be notified of completion and errors by passing in an error handler attached to a payload object.
The ChannelMessage.getAddress contains Channel.getLocalMember, and can be overwritten to simulate a message sent from another node.

Specified by:

sendMessage in interface ChannelInterceptor

Overrides:

sendMessage in class ChannelInterceptorBase

Parameters:

destination - Member[] - the destination for this message

msg - ChannelMessage - the message to be sent

payload - InterceptorPayload - the payload, carrying an error handler and future useful data, can be null

Throws:

ChannelException - if a serialization error happens.

See Also:

ErrorHandler, InterceptorPayload

messageReceived

public void messageReceived(ChannelMessage msg)

Description copied from interface: ChannelInterceptor

the messageReceived is invoked when a message is received. ChannelMessage.getAddress() is the sender, or the reply-to address if it has been overwritten.

Specified by:

messageReceived in interface ChannelInterceptor

Overrides:

messageReceived in class ChannelInterceptorBase

Parameters:

msg - ChannelMessage

compress

public static byte[] compress(byte[] data)
                       throws IOException

Throws:

IOException

decompress

public static byte[] decompress(byte[] data)
                         throws IOException

Parameters:

data - Data to decompress

Returns:

Decompressed data

Throws:

IOException - Compression error