Examples with FileWriter java.io.FileWriter used on opensource projects

Example 6 with FileWriter

use of java.io.FileWriter in project flink by apache.

the class BootstrapTools method writeConfiguration.

/**
	 * Writes a Flink YAML config file from a Flink Configuration object.
	 * @param cfg The Flink config
	 * @param file The File to write to
	 * @throws IOException
	 */
public static void writeConfiguration(Configuration cfg, File file) throws IOException {
    try (FileWriter fwrt = new FileWriter(file);
        PrintWriter out = new PrintWriter(fwrt)) {
        for (String key : cfg.keySet()) {
            String value = cfg.getString(key, null);
            out.print(key);
            out.print(": ");
            out.println(value);
        }
    }
}

Example 7 with FileWriter

use of java.io.FileWriter in project flink by apache.

the class FileChannelStreamsTest method testCloseAndDeleteInputView.

@Test
public void testCloseAndDeleteInputView() {
    final IOManager ioManager = new IOManagerAsync();
    try {
        MemoryManager memMan = new MemoryManager(4 * 16 * 1024, 1, 16 * 1024, MemoryType.HEAP, true);
        List<MemorySegment> memory = new ArrayList<MemorySegment>();
        memMan.allocatePages(new DummyInvokable(), memory, 4);
        FileIOChannel.ID channel = ioManager.createChannel();
        // add some test data
        try (FileWriter wrt = new FileWriter(channel.getPath())) {
            wrt.write("test data");
        }
        BlockChannelReader<MemorySegment> reader = ioManager.createBlockChannelReader(channel);
        FileChannelInputView in = new FileChannelInputView(reader, memMan, memory, 9);
        // read just something
        in.readInt();
        // close for the first time, make sure all memory returns
        in.close();
        assertTrue(memMan.verifyEmpty());
        // close again, should not cause an exception
        in.close();
        // delete, make sure file is removed
        in.closeAndDelete();
        assertFalse(new File(channel.getPath()).exists());
    } catch (Exception e) {
        e.printStackTrace();
        fail(e.getMessage());
    } finally {
        ioManager.shutdown();
    }
}

Example 8 with FileWriter

use of java.io.FileWriter in project hadoop by apache.

the class TestHardLink method makeNonEmptyFile.

private void makeNonEmptyFile(File file, String contents) throws IOException {
    FileWriter fw = new FileWriter(file);
    fw.write(contents);
    fw.close();
}

Example 9 with FileWriter

use of java.io.FileWriter in project flink by apache.

the class CommonTestUtils method printLog4jDebugConfig.

public static void printLog4jDebugConfig(File file) throws IOException {
    try (PrintWriter writer = new PrintWriter(new FileWriter(file))) {
        writer.println("log4j.rootLogger=DEBUG, console");
        writer.println("log4j.appender.console=org.apache.log4j.ConsoleAppender");
        writer.println("log4j.appender.console.target = System.err");
        writer.println("log4j.appender.console.layout=org.apache.log4j.PatternLayout");
        writer.println("log4j.appender.console.layout.ConversionPattern=%-4r [%t] %-5p %c %x - %m%n");
        writer.println("log4j.logger.org.eclipse.jetty.util.log=OFF");
        writer.println("log4j.logger.org.apache.zookeeper=OFF");
        writer.flush();
    }
}

Example 10 with FileWriter

use of java.io.FileWriter in project flink by apache.

the class WriteFormatAsCsv method write.

@Override
protected void write(String path, ArrayList<IN> tupleList) {
    try (PrintWriter outStream = new PrintWriter(new BufferedWriter(new FileWriter(path, true)))) {
        for (IN tupleToWrite : tupleList) {
            String strTuple = tupleToWrite.toString();
            outStream.println(strTuple.substring(1, strTuple.length() - 1));
        }
    } catch (IOException e) {
        throw new RuntimeException("Exception occured while writing file " + path, e);
    }
}