Examples with WritableByteChannel java.nio.channels.WritableByteChannel used on opensource projects

Example 91 with WritableByteChannel

use of java.nio.channels.WritableByteChannel in project j2objc by google.

the class ChannelsTest method testNewChannelOutputStream.

/*
     * Test method for 'java.nio.channels.Channels.NewChannel(OutputStream)'
     */
public void testNewChannelOutputStream() throws IOException {
    int writeNum = 0;
    ByteBuffer writebuf = ByteBuffer.allocateDirect(this.writebufSize);
    for (int val = 0; val < this.writebufSize / 2; val++) {
        writebuf.putChar((char) (val + 64));
    }
    this.fouts = new FileOutputStream(tmpFile);
    WritableByteChannel testChannel = this.fouts.getChannel();
    WritableByteChannel rbChannel = Channels.newChannel(this.fouts);
    assertTrue(testChannel.isOpen());
    assertTrue(rbChannel.isOpen());
    byte[] bit = new byte[1];
    bit[0] = 80;
    this.fouts.write(bit);
    this.fouts.flush();
    this.fins = new FileInputStream(tmpFile);
    assertEquals(this.fins.available(), 1);
    this.fins.close();
    writeNum = rbChannel.write(writebuf);
    // write success ,but output null
    assertEquals(0, writeNum);
    this.fouts.close();
    try {
        writeNum = testChannel.write(writebuf);
        fail();
    } catch (ClosedChannelException e) {
    // correct
    }
    assertEquals(0, writeNum);
    // close of rbchannel does affect on testchannel(same channel)
    rbChannel.close();
    try {
        writeNum = testChannel.write(writebuf);
        fail();
    } catch (ClosedChannelException e) {
    // correct
    }
}

Example 92 with WritableByteChannel

use of java.nio.channels.WritableByteChannel in project j2objc by google.

the class ChannelsTest method testNewOutputStreamWritableByteChannel_InputNull.

public void testNewOutputStreamWritableByteChannel_InputNull() throws Exception {
    byte[] writebuf = new byte[this.testNum];
    try {
        OutputStream testouts = Channels.newOutputStream(null);
        assertNotNull(testouts);
        testouts.write(writebuf);
        fail();
    } catch (NullPointerException expected) {
    }
    try {
        WritableByteChannel writebc = Channels.newChannel((OutputStream) null);
        assertTrue(writebc.isOpen());
        OutputStream testoutputS = Channels.newOutputStream(writebc);
        testoutputS.write(writebuf);
        fail();
    } catch (NullPointerException expected) {
    }
}

Example 93 with WritableByteChannel

use of java.nio.channels.WritableByteChannel in project j2objc by google.

the class ChannelsTest method testNewChannelOutputStream_BufNull.

// test if write buf is null
public void testNewChannelOutputStream_BufNull() throws IOException {
    int writeres = this.testNum;
    ByteBuffer writebuf = null;
    try {
        this.fouts = new FileOutputStream(tmpFile);
    } catch (FileNotFoundException e) {
        fail();
    }
    WritableByteChannel rbChannel = Channels.newChannel(this.fouts);
    try {
        writeres = rbChannel.write(writebuf);
        fail();
    } catch (NullPointerException e) {
    // correct
    }
    assertEquals(this.testNum, writeres);
}

Example 94 with WritableByteChannel

use of java.nio.channels.WritableByteChannel in project deeplearning4j by deeplearning4j.

the class ByteBufferIO method write.

public static void write(OutputStream output, ByteBuffer buffer) throws IOException {
    DataOutputStream dataOutput = new DataOutputStream(new BufferedOutputStream(output));
    dataOutput.writeInt(buffer.position());
    buffer.flip();
    WritableByteChannel channel = Channels.newChannel(dataOutput);
    channel.write(buffer);
    // TODO: Do we need this?
    dataOutput.flush();
}

Example 95 with WritableByteChannel

use of java.nio.channels.WritableByteChannel in project jstorm by alibaba.

the class Utils method downloadFromMaster.

public static void downloadFromMaster(Map conf, String file, String localFile) throws IOException, TException {
    WritableByteChannel out = null;
    NimbusClient client = null;
    try {
        client = NimbusClient.getConfiguredClient(conf, 10 * 1000);
        String id = client.getClient().beginFileDownload(file);
        out = Channels.newChannel(new FileOutputStream(localFile));
        while (true) {
            ByteBuffer chunk = client.getClient().downloadChunk(id);
            int written = out.write(chunk);
            if (written == 0) {
                client.getClient().finishFileDownload(id);
                break;
            }
        }
    } finally {
        if (out != null)
            out.close();
        if (client != null)
            client.close();
    }
}