Example usage for org.springframework.integration.file.tail FileTailingMessageProducerSupport setFile

Introduction

In this page you can find the example usage for org.springframework.integration.file.tail FileTailingMessageProducerSupport setFile.

Prototype

public void setFile(File file) 

Source Link

Document

The name of the file you wish to tail.

Usage

From source file:org.springframework.integration.file.tail.FileTailingMessageProducerTests.java

private void testGuts(FileTailingMessageProducerSupport adapter, String field) throws Exception {
    this.adapter = adapter;
    final List<FileTailingEvent> events = new ArrayList<FileTailingEvent>();
    adapter.setApplicationEventPublisher(new ApplicationEventPublisher() {
        @Override/*from w w w . j av  a 2  s  .com*/
        public void publishEvent(ApplicationEvent event) {
            FileTailingEvent tailEvent = (FileTailingEvent) event;
            logger.warn(event);
            events.add(tailEvent);
        }
    });
    adapter.setFile(new File(testDir, "foo"));
    QueueChannel outputChannel = new QueueChannel();
    adapter.setOutputChannel(outputChannel);
    adapter.setTailAttemptsDelay(500);
    adapter.afterPropertiesSet();
    File file = new File(testDir, "foo");
    File renamed = new File(testDir, "bar");
    file.delete();
    renamed.delete();
    adapter.start();
    waitForField(adapter, field);
    FileOutputStream foo = new FileOutputStream(file);
    for (int i = 0; i < 50; i++) {
        foo.write(("hello" + i + "\n").getBytes());
    }
    foo.flush();
    foo.close();
    for (int i = 0; i < 50; i++) {
        Message<?> message = outputChannel.receive(5000);
        assertNotNull("expected a non-null message", message);
        assertEquals("hello" + i, message.getPayload());
    }
    file.renameTo(renamed);
    file = new File(testDir, "foo");
    foo = new FileOutputStream(file);
    if (adapter instanceof ApacheCommonsFileTailingMessageProducer) {
        Thread.sleep(1000);
    }
    for (int i = 50; i < 100; i++) {
        foo.write(("hello" + i + "\n").getBytes());
    }
    foo.flush();
    foo.close();
    for (int i = 50; i < 100; i++) {
        Message<?> message = outputChannel.receive(10000);
        assertNotNull("expected a non-null message", message);
        assertEquals("hello" + i, message.getPayload());
    }
}

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