org.apache.nifi.distributed.cache.client

Class DistributedCacheClient

java.lang.Object

org.apache.nifi.distributed.cache.client.DistributedCacheClient

Direct Known Subclasses:

NettyDistributedMapCacheClient, NettyDistributedSetCacheClient

public class DistributedCacheClient
extends Object

Encapsulate operations which may be performed using a DistributedSetCacheClientService or a DistributedMapCacheClientService.

Field Summary

Fields

Modifier and Type	Field and Description
private io.netty.channel.pool.ChannelPool	channelPool The pool of network connections used to service client requests.

Constructor Summary

Constructors

Modifier	Constructor and Description
protected	DistributedCacheClient(String hostname, int port, int timeoutMillis, SSLContextService sslContextService, VersionNegotiatorFactory factory) Constructor.

Method Summary

Modifier and Type	Method and Description
protected void	closeChannelPool() Shutdown ChannelPool cleanly.
protected void	invoke(OutboundAdapter outboundAdapter, InboundAdapter inboundAdapter) Call a service method.

Methods inherited from class java.lang.Object

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

Field Detail

channelPool

private final io.netty.channel.pool.ChannelPool channelPool

The pool of network connections used to service client requests.

Constructor Detail

DistributedCacheClient

protected DistributedCacheClient(String hostname,
                                 int port,
                                 int timeoutMillis,
                                 SSLContextService sslContextService,
                                 VersionNegotiatorFactory factory)

Constructor.

Parameters:

hostname - the network name / IP address of the server running the distributed cache service

port - the port on which the distributed cache service is running

timeoutMillis - the network timeout associated with requests to the service

sslContextService - the SSL context (if any) associated with requests to the service; if not specified, communications will not be encrypted

factory - creator of object used to broker the version of the distributed cache protocol with the service

Method Detail

invoke

protected void invoke(OutboundAdapter outboundAdapter,
                      InboundAdapter inboundAdapter)
               throws IOException

Call a service method.

Parameters:

outboundAdapter - the object used to assemble the service request byte stream

inboundAdapter - the object used to interpret the service response byte stream

Throws:

IOException - on serialization failure; on communication failure

closeChannelPool

protected void closeChannelPool()

Shutdown ChannelPool cleanly.