Example usage for org.springframework.integration.file.support FileExistsMode APPEND_NO_FLUSH

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In this page you can find the example usage for org.springframework.integration.file.support FileExistsMode APPEND_NO_FLUSH.

Prototype

FileExistsMode APPEND_NO_FLUSH

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Document

Append data to any pre-existing files; do not flush/close after appending.

Usage

From source file:org.springframework.integration.file.FileWritingMessageHandlerTests.java

@Test
public void noFlushAppend() throws Exception {
    File tempFolder = this.temp.newFolder();
    FileWritingMessageHandler handler = new FileWritingMessageHandler(tempFolder);
    handler.setFileExistsMode(FileExistsMode.APPEND_NO_FLUSH);
    handler.setFileNameGenerator(message -> "foo.txt");
    ThreadPoolTaskScheduler taskScheduler = new ThreadPoolTaskScheduler();
    taskScheduler.afterPropertiesSet();// w w w .  j a v a2s .co m
    handler.setTaskScheduler(taskScheduler);
    handler.setOutputChannel(new NullChannel());
    handler.setBeanFactory(mock(BeanFactory.class));
    handler.setFlushInterval(30000);
    handler.afterPropertiesSet();
    handler.start();
    File file = new File(tempFolder, "foo.txt");
    handler.handleMessage(new GenericMessage<String>("foo"));
    handler.handleMessage(new GenericMessage<String>("bar"));
    handler.handleMessage(new GenericMessage<String>("baz"));
    handler.handleMessage(new GenericMessage<byte[]>("qux".getBytes())); // change of payload type forces flush
    assertThat(file.length(), greaterThanOrEqualTo(9L));
    handler.stop(); // forces flush
    assertThat(file.length(), equalTo(12L));
    handler.setFlushInterval(100);
    handler.start();
    handler.handleMessage(new GenericMessage<InputStream>(new ByteArrayInputStream("fiz".getBytes())));
    int n = 0;
    while (n++ < 100 && file.length() < 15) {
        Thread.sleep(100);
    }
    assertThat(file.length(), equalTo(15L));
    handler.handleMessage(new GenericMessage<InputStream>(new ByteArrayInputStream("buz".getBytes())));
    handler.trigger(new GenericMessage<String>(Matcher.quoteReplacement(file.getAbsolutePath())));
    assertThat(file.length(), equalTo(18L));
    assertEquals(0, TestUtils.getPropertyValue(handler, "fileStates", Map.class).size());

    handler.setFlushInterval(30000);
    final AtomicBoolean called = new AtomicBoolean();
    handler.setFlushPredicate((fileAbsolutePath, firstWrite, lastWrite, triggerMessage) -> {
        called.set(true);
        return true;
    });
    handler.handleMessage(new GenericMessage<InputStream>(new ByteArrayInputStream("box".getBytes())));
    handler.trigger(new GenericMessage<String>("foo"));
    assertThat(file.length(), equalTo(21L));
    assertTrue(called.get());

    handler.handleMessage(new GenericMessage<InputStream>(new ByteArrayInputStream("bux".getBytes())));
    called.set(false);
    handler.flushIfNeeded((fileAbsolutePath, firstWrite, lastWrite) -> {
        called.set(true);
        return true;
    });
    assertThat(file.length(), equalTo(24L));
    assertTrue(called.get());

    handler.stop();
    Log logger = spy(TestUtils.getPropertyValue(handler, "logger", Log.class));
    new DirectFieldAccessor(handler).setPropertyValue("logger", logger);
    when(logger.isDebugEnabled()).thenReturn(true);
    final AtomicInteger flushes = new AtomicInteger();
    doAnswer(i -> {
        flushes.incrementAndGet();
        return null;
    }).when(logger).debug(startsWith("Flushed:"));
    handler.setFlushInterval(50);
    handler.setFlushWhenIdle(false);
    handler.start();
    for (int i = 0; i < 40; i++) {
        handler.handleMessage(new GenericMessage<String>("foo"));
        Thread.sleep(5);
    }
    assertThat(flushes.get(), greaterThanOrEqualTo(2));
    handler.stop();
}

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From source file:org.springframework.integration.file.FileWritingMessageHandlerTests.java

@Test
public void lockForFlush() throws Exception {
    File tempFolder = this.temp.newFolder();
    ByteArrayOutputStream baos = new ByteArrayOutputStream();
    final BufferedOutputStream out = spy(new BufferedOutputStream(baos));
    FileWritingMessageHandler handler = new FileWritingMessageHandler(tempFolder) {

        @Override//from  w  ww .j  av  a2s.  c  om
        protected BufferedOutputStream createOutputStream(File fileToWriteTo, boolean append) {
            return out;
        }

    };
    handler.setFileExistsMode(FileExistsMode.APPEND_NO_FLUSH);
    handler.setFileNameGenerator(message -> "foo.txt");
    ThreadPoolTaskScheduler taskScheduler = new ThreadPoolTaskScheduler();
    taskScheduler.afterPropertiesSet();
    handler.setTaskScheduler(taskScheduler);
    handler.setOutputChannel(new NullChannel());
    handler.setBeanFactory(mock(BeanFactory.class));
    handler.setFlushInterval(10);
    handler.setFlushWhenIdle(false);
    handler.afterPropertiesSet();
    handler.start();

    final AtomicBoolean writing = new AtomicBoolean();
    final AtomicBoolean closeWhileWriting = new AtomicBoolean();
    willAnswer(i -> {
        writing.set(true);
        Thread.sleep(500);
        writing.set(false);
        return null;
    }).given(out).write(any(byte[].class), anyInt(), anyInt());
    willAnswer(i -> {
        closeWhileWriting.compareAndSet(false, writing.get());
        return null;
    }).given(out).close();
    handler.handleMessage(new GenericMessage<>("foo".getBytes()));
    verify(out).write(any(byte[].class), anyInt(), anyInt());
    assertFalse(closeWhileWriting.get());
    handler.stop();
}

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