Example usage for java.util.concurrent ArrayBlockingQueue drainTo

Introduction

In this page you can find the example usage for java.util.concurrent ArrayBlockingQueue drainTo.

Prototype

public int drainTo(Collection<? super E> c, int maxElements) 

Source Link

Usage

From source file:Main.java

public static void main(String[] argv) throws Exception {
    List<Integer> list = new ArrayList<Integer>();

    int capacity = 100;
    ArrayBlockingQueue<Integer> queue = new ArrayBlockingQueue<Integer>(capacity);
    queue.put(0);//w ww.j a v a  2 s.c  o m
    queue.put(1);
    queue.put(2);
    queue.drainTo(list, 3);
    System.out.println(queue);
    System.out.println(list);
}

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From source file:org.codice.ddf.commands.catalog.IngestCommand.java

private void submitToCatalog(ScheduledExecutorService batchScheduler, ExecutorService executorService,
        ArrayBlockingQueue<Metacard> metacardQueue, CatalogFacade catalog, long start) {

    batchScheduler.scheduleWithFixedDelay(() -> {
        int queueSize = metacardQueue.size();
        if (queueSize > 0) {

            ArrayList<Metacard> metacardBatch = new ArrayList<>(batchSize);

            if (queueSize > batchSize || doneBuildingQueue.get()) {
                metacardQueue.drainTo(metacardBatch, batchSize);
                processingThreads.incrementAndGet();
            }//from w  w w  .  jav  a2  s .  c  o m

            if (metacardBatch.size() > 0) {
                executorService.submit(() -> {
                    try {
                        processBatch(catalog, metacardBatch);
                    } catch (SourceUnavailableException e) {
                        if (INGEST_LOGGER.isWarnEnabled()) {
                            INGEST_LOGGER.warn("Error on process batch: {}", e);
                        }
                    }
                });
                printProgressAndFlush(start, fileCount.get(), ingestCount.get() + ignoreCount.get());
            }
        }
    }, 100, 100, TimeUnit.MILLISECONDS);
}

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