Examples of DeferredFileOutputStream

org.apache.commons.fileupload.DeferredFileOutputStream

An output stream which will retain data in memory until a specified threshold is reached, and only then commit it to disk. If the stream is closed before the threshold is reached, the data will not be written to disk at all.
@author Martin Cooper @version $Id: DeferredFileOutputStream.java,v 1.2 2003/05/31 22:31:08 martinc Exp $
org.apache.commons.io.output.DeferredFileOutputStream

An output stream which will retain data in memory until a specified threshold is reached, and only then commit it to disk. If the stream is closed before the threshold is reached, the data will not be written to disk at all.

This class originated in FileUpload processing. In this use case, you do not know in advance the size of the file being uploaded. If the file is small you want to store it in memory (for speed), but if the file is large you want to store it to file (to avoid memory issues).
@author Martin Cooper @author gaxzerow @version $Id: DeferredFileOutputStream.java 280004 2005-09-10 13:19:17Z scolebourne $
org.apache.tomcat.util.http.fileupload.DeferredFileOutputStream
An output stream which will retain data in memory until a specified threshold is reached, and only then commit it to disk. If the stream is closed before the threshold is reached, the data will not be written to disk at all.
This class originated in FileUpload processing. In this use case, you do not know in advance the size of the file being uploaded. If the file is small you want to store it in memory (for speed), but if the file is large you want to store it to file (to avoid memory issues). @version $Id: DeferredFileOutputStream.java 1456969 2013-03-15 14:37:04Z markt $
org.apache.wicket.util.io.DeferredFileOutputStream

An output stream which will retain data in memory until a specified threshold is reached, and only then commit it to disk. If the stream is closed before the threshold is reached, the data will not be written to disk at all.

This class originated in FileUpload processing. In this use case, you do not know in advance the size of the file being uploaded. If the file is small you want to store it in memory (for speed), but if the file is large you want to store it to file (to avoid memory issues).
@author Martin Cooper
org.subethamail.smtp.io.DeferredFileOutputStream
This works like a ByteArrayOutputStream until a certain size is reached, then creates a temp file and acts like a buffered FileOutputStream. The data can be retreived afterwards by calling getInputStream(). When this object is closed, the temporary file is deleted. You can no longer call getInputStream(). @author Jeff Schnitzer

Examples of org.apache.commons.fileupload.DeferredFileOutputStream

     * Tests the case where the amount of data falls below the threshold, and
     * is therefore confined to memory.
     */
    public void testBelowThreshold()
    {
        DeferredFileOutputStream dfos =
                new DeferredFileOutputStream(testBytes.length + 42, null);
        try
        {
            dfos.write(testBytes, 0, testBytes.length);
            dfos.close();
        }
        catch (IOException e) {
            fail("Unexpected IOException");
        }
        assertTrue(dfos.isInMemory());


        byte[] resultBytes = dfos.getData();
        assertTrue(resultBytes.length == testBytes.length);
        assertTrue(Arrays.equals(resultBytes, testBytes));
    }

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Examples of org.apache.commons.fileupload.DeferredFileOutputStream

     * Tests the case where the amount of data is exactly the same as the
     * threshold. The behavior should be the same as that for the amount of
     * data being below (i.e. not exceeding) the threshold.
     */
    public void testAtThreshold() {
        DeferredFileOutputStream dfos =
                new DeferredFileOutputStream(testBytes.length, null);
        try
        {
            dfos.write(testBytes, 0, testBytes.length);
            dfos.close();
        }
        catch (IOException e) {
            fail("Unexpected IOException");
        }
        assertTrue(dfos.isInMemory());


        byte[] resultBytes = dfos.getData();
        assertTrue(resultBytes.length == testBytes.length);
        assertTrue(Arrays.equals(resultBytes, testBytes));
    }

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Examples of org.apache.commons.fileupload.DeferredFileOutputStream

        File testFile = new File("testAboveThreshold.dat");


        // Ensure that the test starts from a clean base.
        testFile.delete();


        DeferredFileOutputStream dfos =
                new DeferredFileOutputStream(testBytes.length - 5, testFile);
        try
        {
            dfos.write(testBytes, 0, testBytes.length);
            dfos.close();
        }
        catch (IOException e) {
            fail("Unexpected IOException");
        }
        assertFalse(dfos.isInMemory());
        assertNull(dfos.getData());


        verifyResultFile(testFile);


        // Ensure that the test starts from a clean base.
        testFile.delete();

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Examples of org.apache.commons.fileupload.DeferredFileOutputStream

        File testFile = new File("testThresholdReached.dat");


        // Ensure that the test starts from a clean base.
        testFile.delete();


        DeferredFileOutputStream dfos =
                new DeferredFileOutputStream(testBytes.length / 2, testFile);
        int chunkSize = testBytes.length / 3;


        try
        {
            dfos.write(testBytes, 0, chunkSize);
            dfos.write(testBytes, chunkSize, chunkSize);
            dfos.write(testBytes, chunkSize * 2,
                    testBytes.length - chunkSize * 2);
            dfos.close();
        }
        catch (IOException e) {
            fail("Unexpected IOException");
        }
        assertFalse(dfos.isInMemory());
        assertNull(dfos.getData());


        verifyResultFile(testFile);


        // Ensure that the test starts from a clean base.
        testFile.delete();

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Examples of org.apache.commons.io.output.DeferredFileOutputStream


    private static final Charset UTF8 = Charset.forName( "UTF-8" );


    public Utf8RecodingDeferredFileOutputStream( String channel )
    {
        this.deferredFileOutputStream = new DeferredFileOutputStream( 1000000, channel, "deferred", null );
    }

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Examples of org.apache.commons.io.output.DeferredFileOutputStream

     */
    public OutputStream getOutputStream()
        throws IOException {
        if (dfos == null) {
            File outputFile = getTempFile();
            dfos = new DeferredFileOutputStream(sizeThreshold, outputFile);
        }
        return dfos;
    }

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Examples of org.apache.commons.io.output.DeferredFileOutputStream

     */
    public OutputStream getOutputStream()
        throws IOException {
        if (dfos == null) {
            File outputFile = getTempFile();
            dfos = new DeferredFileOutputStream(sizeThreshold, outputFile);
        }
        return dfos;
    }

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Examples of org.apache.commons.io.output.DeferredFileOutputStream

            this.side = os;
        }
    }


    private DeferredFileOutputStream newLog() {
        return new DeferredFileOutputStream(10*1024,"maven-build","log",null);
    }

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Examples of org.apache.commons.io.output.DeferredFileOutputStream

     */
    public OutputStream getOutputStream()
        throws IOException {
        if (dfos == null) {
            File outputFile = getTempFile();
            dfos = new DeferredFileOutputStream(sizeThreshold, outputFile);
        }
        return dfos;
    }

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Examples of org.apache.commons.io.output.DeferredFileOutputStream


    private static final Charset UTF8 = Charset.forName( "UTF-8" );


    public Utf8RecodingDeferredFileOutputStream( String channel )
    {
        this.deferredFileOutputStream = new DeferredFileOutputStream( 1000000, channel, "deferred", null );
    }

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