org.apache.tika.pipes.pipesiterator

Class CallablePipesIterator

java.lang.Object

org.apache.tika.pipes.pipesiterator.CallablePipesIterator

All Implemented Interfaces:

Callable<Long>

public class CallablePipesIterator
extends Object
implements Callable<Long>

This is a simple wrapper around PipesIterator that allows it to be called in its own thread.

Constructor Summary

Constructors

Constructor and Description
CallablePipesIterator(PipesIterator pipesIterator, ArrayBlockingQueue<FetchEmitTuple> queue) This sets timeoutMillis to -1, meaning that this will block forever trying to add fetchemittuples to the queue.
CallablePipesIterator(PipesIterator pipesIterator, ArrayBlockingQueue<FetchEmitTuple> queue, long timeoutMillis) This sets the number of PipesIterator.COMPLETED_SEMAPHORE to 1.
CallablePipesIterator(PipesIterator pipesIterator, ArrayBlockingQueue<FetchEmitTuple> queue, long timeoutMillis, int numConsumers)

Method Summary

Modifier and Type	Method and Description
Long	call()

Methods inherited from class java.lang.Object

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

Constructor Detail

CallablePipesIterator

public CallablePipesIterator(PipesIterator pipesIterator,
                             ArrayBlockingQueue<FetchEmitTuple> queue)

This sets timeoutMillis to -1, meaning that this will block forever trying to add fetchemittuples to the queue. This sets the number of PipesIterator.COMPLETED_SEMAPHORE to 1. This means that your consumers must put the semaphore back in the queue after they finish.

Parameters:

pipesIterator -

queue -

CallablePipesIterator

public CallablePipesIterator(PipesIterator pipesIterator,
                             ArrayBlockingQueue<FetchEmitTuple> queue,
                             long timeoutMillis)

This sets the number of PipesIterator.COMPLETED_SEMAPHORE to 1. This means that your consumers must put the semaphore back in the queue after they finish.

Parameters:

pipesIterator - underlying pipes iterator to use

queue - queue to add the fetch emit tuples to

timeoutMillis - how long to try to offer the fetch emit tuples to the queue. If -1, this will block with ArrayBlockingQueue.put(Object) forever.

CallablePipesIterator

public CallablePipesIterator(PipesIterator pipesIterator,
                             ArrayBlockingQueue<FetchEmitTuple> queue,
                             long timeoutMillis,
                             int numConsumers)

Parameters:

pipesIterator - underlying pipes iterator to use

queue - queue to add the fetch emit tuples to

timeoutMillis - how long to try to offer the fetch emit tuples to the queue. If -1, this will block with ArrayBlockingQueue.put(Object) forever.

numConsumers - how many PipesIterator.COMPLETED_SEMAPHORE to add to the queue. If the consumers are adding this back to the queue when they find it, then this should be set to 1, otherwise, for a single semaphore for each consumer, set this to the number of consumers

Method Detail

call

public Long call()
          throws Exception

Specified by:

call in interface Callable<Long>

Throws:

Exception