com.blacklocus.qs

Class MessageQueueReader<T,R>

java.lang.Object

com.blacklocus.misc.ExceptingRunnable

com.blacklocus.qs.QueueReader<Message,T,R>

com.blacklocus.qs.MessageQueueReader<T,R>

Type Parameters:

T - the type of message that this reader can convert

R - the result of processing the converted message

All Implemented Interfaces:

java.lang.Runnable

public class MessageQueueReader<T,R>
extends QueueReader<Message,T,R>

This class provides a general purpose "grab thing off queue and process it with threads" abstraction, decoupling the queue reading thread from the pool of processing threads.

Field Summary

Fields inherited from class com.blacklocus.qs.QueueReader

DEFAULT_SLEEP_MS, executor, handler, queueItemProvider, sleepMs

Constructor Summary

Constructors

Constructor and Description
MessageQueueReader(MessageProvider messageProvider, MessageHandler<T,R> handler, java.util.concurrent.ExecutorService executor) Construct a new MessageQueueReader with the default idle timeout.
MessageQueueReader(MessageProvider messageProvider, MessageHandler<T,R> handler, java.util.concurrent.ExecutorService executor, long sleepMs) Construct a new MessageQueueReader with the given timeout.

Method Summary

Methods inherited from class com.blacklocus.qs.QueueReader

go

Methods inherited from class com.blacklocus.misc.ExceptingRunnable

run

Methods inherited from class java.lang.Object

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

Constructor Detail

MessageQueueReader

public MessageQueueReader(MessageProvider messageProvider,
                  MessageHandler<T,R> handler,
                  java.util.concurrent.ExecutorService executor)

Construct a new MessageQueueReader with the default idle timeout.

Parameters:

messageProvider - provider to endlessly pull messages from

handler - handler implementation to convert and process messages

executor - executor service used for forking message handler processing

MessageQueueReader

public MessageQueueReader(MessageProvider messageProvider,
                  MessageHandler<T,R> handler,
                  java.util.concurrent.ExecutorService executor,
                  long sleepMs)

Construct a new MessageQueueReader with the given timeout.

Parameters:

messageProvider - provider to endlessly pull messages from

handler - handler implementation to convert and process messages

executor - executor service used for forking message handler processing

sleepMs - how long to sleep in ms between reads from the queue where no messages are returned