org.glassfish.grizzly.memcached

Class MemcachedClientFilter

java.lang.Object

org.glassfish.grizzly.filterchain.BaseFilter

org.glassfish.grizzly.memcached.MemcachedClientFilter

All Implemented Interfaces:

org.glassfish.grizzly.filterchain.Filter

public class MemcachedClientFilter
extends org.glassfish.grizzly.filterchain.BaseFilter

The Filter implementation for memcached

This filter has an unbounded BlockingQueue per a connection for storing user's request. When the response will be received, the corresponding request will be removed in queue and the filter will pass the complete result to original request and notify the waiting sender.

If the memcached's command is a kind of quiet's, it is possible for the server not to send the response to client. Then the filter skips the quiet request with MemcachedClientFilter.ParsingStatus.NO_REPLY status and processes next request.

This filter has two options. 1) localParsingOptimizing: the input buffer has more than 1 complete memcached message, the filter will parse the input buffer continuously in the same thread and local loop without going through filter chains and spliting up the input buffer if this flag is true.

2) onceAllocationOptimizing: Before multi-command(bulk-command) like getMulti and setMulti will be sent to the server, individual packets should be allocated. If this flag is true, the filter will calculate the total buffer size of individual requests in advance and will allocate only a Buffer once.

Author:

Bongjae Chang

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
static class	MemcachedClientFilter.ParsingStatus

Constructor Summary

Constructors

Constructor and Description
MemcachedClientFilter()
MemcachedClientFilter(boolean localParsingOptimizing, boolean onceAllocationOptimizing)

Method Summary

Methods

Modifier and Type	Method and Description
<V> V	getCorrelatedResponse(org.glassfish.grizzly.Connection connection, MemcachedRequest request, long timeoutInMillis)
<K,V> Map<K,V>	getMultiResponse(org.glassfish.grizzly.Connection connection, MemcachedRequest[] requests, long timeoutInMillis, Map<K,V> result)
org.glassfish.grizzly.filterchain.NextAction	handleClose(org.glassfish.grizzly.filterchain.FilterChainContext ctx)
org.glassfish.grizzly.filterchain.NextAction	handleRead(org.glassfish.grizzly.filterchain.FilterChainContext ctx)
org.glassfish.grizzly.filterchain.NextAction	handleWrite(org.glassfish.grizzly.filterchain.FilterChainContext ctx)

Methods inherited from class org.glassfish.grizzly.filterchain.BaseFilter

createContext, exceptionOccurred, handleAccept, handleConnect, handleEvent, onAdded, onFilterChainChanged, onRemoved

Methods inherited from class java.lang.Object

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

Constructor Detail

MemcachedClientFilter

public MemcachedClientFilter()

MemcachedClientFilter

public MemcachedClientFilter(boolean localParsingOptimizing,
                     boolean onceAllocationOptimizing)

Method Detail

handleRead

public org.glassfish.grizzly.filterchain.NextAction handleRead(org.glassfish.grizzly.filterchain.FilterChainContext ctx)
                                                        throws IOException

Specified by:

handleRead in interface org.glassfish.grizzly.filterchain.Filter

Overrides:

handleRead in class org.glassfish.grizzly.filterchain.BaseFilter

Throws:

IOException

handleWrite

public org.glassfish.grizzly.filterchain.NextAction handleWrite(org.glassfish.grizzly.filterchain.FilterChainContext ctx)
                                                         throws IOException

Specified by:

handleWrite in interface org.glassfish.grizzly.filterchain.Filter

Overrides:

handleWrite in class org.glassfish.grizzly.filterchain.BaseFilter

Throws:

IOException

handleClose

public org.glassfish.grizzly.filterchain.NextAction handleClose(org.glassfish.grizzly.filterchain.FilterChainContext ctx)
                                                         throws IOException

Specified by:

handleClose in interface org.glassfish.grizzly.filterchain.Filter

Overrides:

handleClose in class org.glassfish.grizzly.filterchain.BaseFilter

Throws:

IOException

getMultiResponse

public <K,V> Map<K,V> getMultiResponse(org.glassfish.grizzly.Connection connection,
                              MemcachedRequest[] requests,
                              long timeoutInMillis,
                              Map<K,V> result)
                          throws InterruptedException,
                                 TimeoutException

Throws:

InterruptedException

TimeoutException

getCorrelatedResponse

public <V> V getCorrelatedResponse(org.glassfish.grizzly.Connection connection,
                          MemcachedRequest request,
                          long timeoutInMillis)
                        throws InterruptedException,
                               TimeoutException

Throws:

InterruptedException

TimeoutException