Example usage for java.util.concurrent ExecutorCompletionService poll

Introduction

In this page you can find the example usage for java.util.concurrent ExecutorCompletionService poll.

Prototype

public Future<V> poll() 

Source Link

Usage

From source file:com.streamsets.pipeline.stage.origin.jdbc.AbstractTableJdbcSource.java

/**
 * Checks whether any of the {@link TableJdbcRunnable} workers completed
 * and whether there is any error that needs to be handled from them.
 * @param completionService {@link ExecutorCompletionService} used to detect completion
 * @throws StageException if {@link StageException} is thrown by the workers (if the error handling is stop pipeline)
 *///ww  w.  ja  va  2 s.com
private void checkWorkerStatus(ExecutorCompletionService<Future> completionService) throws StageException {
    Future future = completionService.poll();
    if (future != null) {
        try {
            future.get();
        } catch (InterruptedException e) {
            LOG.error("Thread interrupted", e);
        } catch (ExecutionException e) {
            Throwable cause = Throwables.getRootCause(e);
            if (cause != null && cause instanceof StageException) {
                throw (StageException) cause;
            } else {
                LOG.error("Internal Error", e);
                throw new StageException(JdbcErrors.JDBC_75, e.toString(), e);
            }
        }
    }
}

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