Example usage for java.io FileInputStream getChannel

Introduction

In this page you can find the example usage for java.io FileInputStream getChannel.

Prototype

public FileChannel getChannel() 

Source Link

Document

Returns the unique java.nio.channels.FileChannel FileChannel object associated with this file input stream.

Usage

From source file:com.taobao.common.tfs.DefaultTfsManager.java

public String saveTfsFile(String localFileName, String tfsFileName, String tfsSuffix) {
    if (localFileName == null) {
        log.error("localfile name is null");
        return null;
    }// ww  w  .  ja  v a 2 s. co  m

    FileInputStream input = null;
    try {
        input = new FileInputStream(localFileName);
        long length = input.getChannel().size();
        return saveFileEx(input, tfsFileName, tfsSuffix, checkFileType(length), localFileName, false);
    } catch (TfsException e) {
        log.error("save fail: " + localFileName + "=>" + tfsFileName + "," + tfsSuffix, e);
    } catch (FileNotFoundException e) {
        log.error("local file: " + localFileName + " not exist,", e);
    } catch (IOException e) {
        log.error("local file: " + localFileName + " IO failed,", e);
    } finally {
        try {
            if (input != null) {
                input.close();
            }
        } catch (IOException e) {
            log.error("close local file fail ", e);
        }
    }
    return null;
}

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From source file:org.opennms.install.Installer.java

/**
 * <p>copyFile</p>/*from ww w .  ja v  a  2  s. c  o m*/
 *
 * @param source a {@link java.lang.String} object.
 * @param destination a {@link java.lang.String} object.
 * @param description a {@link java.lang.String} object.
 * @param recursive a boolean.
 * @throws java.lang.Exception if any.
 */
public void copyFile(String source, String destination, String description, boolean recursive)
        throws Exception {
    File sourceFile = new File(source);
    File destinationFile = new File(destination);

    if (!sourceFile.exists()) {
        throw new Exception("source file (" + source + ") does not exist!");
    }
    if (!sourceFile.isFile()) {
        throw new Exception("source file (" + source + ") is not a file!");
    }
    if (!sourceFile.canRead()) {
        throw new Exception("source file (" + source + ") is not readable!");
    }
    if (destinationFile.exists()) {
        System.out.print("  - " + destination + " exists, removing... ");
        if (destinationFile.delete()) {
            System.out.println("REMOVED");
        } else {
            System.out.println("FAILED");
            throw new Exception("unable to delete existing file: " + sourceFile);
        }
    }

    System.out.print("  - copying " + source + " to " + destination + "... ");
    if (!destinationFile.getParentFile().exists()) {
        if (!destinationFile.getParentFile().mkdirs()) {
            throw new Exception("unable to create directory: " + destinationFile.getParent());
        }
    }
    if (!destinationFile.createNewFile()) {
        throw new Exception("unable to create file: " + destinationFile);
    }
    FileChannel from = null;
    FileInputStream fisFrom = null;
    FileChannel to = null;
    FileOutputStream fisTo = null;
    try {
        fisFrom = new FileInputStream(sourceFile);
        from = fisFrom.getChannel();
        fisTo = new FileOutputStream(destinationFile);
        to = fisTo.getChannel();
        to.transferFrom(from, 0, from.size());
    } catch (FileNotFoundException e) {
        throw new Exception("unable to copy " + sourceFile + " to " + destinationFile, e);
    } finally {
        IOUtils.closeQuietly(fisTo);
        IOUtils.closeQuietly(to);
        IOUtils.closeQuietly(fisFrom);
        IOUtils.closeQuietly(from);
    }
    System.out.println("DONE");
}

---

From source file:org.wso2.esb.integration.common.utils.ESBTestCaseUtils.java

/**
 * Copy the given source file to the given destination
 *
 * @param sourceUri source file location
 * @param destUri   destination file location
 * @throws IOException//from  w w  w  . j a v a2 s .co  m
 */
public static void copyFile(String sourceUri, String destUri) throws IOException {
    File sourceFile = new File(sourceUri);
    File destFile = new File(destUri);

    if (destFile.exists()) {
        destFile.delete();
    }
    destFile.createNewFile();
    FileInputStream fileInputStream = null;
    FileOutputStream fileOutputStream = null;

    try {
        fileInputStream = new FileInputStream(sourceFile);
        fileOutputStream = new FileOutputStream(destFile);

        FileChannel source = fileInputStream.getChannel();
        FileChannel destination = fileOutputStream.getChannel();
        destination.transferFrom(source, 0, source.size());
    } finally {
        IOUtils.closeQuietly(fileInputStream);
        IOUtils.closeQuietly(fileOutputStream);
    }
}

---

From source file:com.taobao.common.tfs.DefaultTfsManager.java

public String saveUniqueFile(String localFileName, String tfsFileName, String tfsSuffix, boolean simpleName) {
    if (localFileName == null) {
        log.error("localfile name is null");
        return null;
    }/*w w w  .  j a va2s. co m*/
    if (!checkUniqueStoreConfig()) {
        log.error(
                "unique server parameter not config error: serverList, groupName, namespace must be configed");
        return null;
    }

    FileInputStream input = null;
    byte[] data = null;
    try {
        input = new FileInputStream(localFileName);
        data = new byte[(int) input.getChannel().size()];

        int ret = input.read(data);

        if (ret != data.length) {
            log.error("read file:" + localFileName + " failed.");
            return null;
        }

        checkUniqueStoreInit();

        TfsFile file = filePool.getFile();
        return file.saveUnique(uniqueStore, tfsFileName, tfsSuffix, data, 0, data.length, simpleName);
    } catch (FileNotFoundException e) {
        log.error("file not found.", e);
    } catch (IOException e) {
        log.error("io error.", e);
    } catch (RuntimeException e) {
        // tair may throw runtimeexception if first init fail.
        // must reinit again
        uniqueStore = null;
        log.warn("saveUniqueFile fail, just saveFile. runtime exception: ", e);
        return saveFile(tfsFileName, tfsSuffix, data, 0, data.length, simpleName);
    } catch (Exception e) {
        log.warn("saveUniqueFile fail, just saveFile.", e);
        return saveFile(tfsFileName, tfsSuffix, data, 0, data.length, simpleName);
    } finally {
        if (input != null) {
            try {
                input.close();
            } catch (IOException e) {
                log.error("close local file fail.");
            }
        }
    }

    return null;
}

---

From source file:org.crs4.entando.innomanager.aps.system.services.layer.LayerManager.java

@Override
public List<String> getShapeFileAttributes(File dbfFile) {
    List<String> attributes = new ArrayList<String>();
    try {/*from   w w w .j  ava 2s . co  m*/
        FileInputStream fis = new FileInputStream(dbfFile);
        DbaseFileReader dbfReader = new DbaseFileReader(fis.getChannel(), false, Charset.forName("UTF8"));
        DbaseFileHeader dbfHeader = dbfReader.getHeader();
        int n = dbfHeader.getNumFields();
        for (int i = 0; i < n; i++)
            attributes.add(dbfHeader.getFieldName(i) + ": " + dbfHeader.getFieldClass(i).getSimpleName());
        return attributes;
    } catch (Exception e) {
        ApsSystemUtils.getLogger().debug(e.getMessage());
    }
    return attributes;
}

---

From source file:adept.io.Reader.java

/**
 * Reads specified file into a string./*  ww  w  .  j  a  va2  s. co m*/
 *
 * @param path the path
 * @return the string
 */
public String readFileIntoString(String path) {
    try {
        String absolutePath = path;
        //         String absolutePath = getAbsolutePathFromClasspathOrFileSystem(path);
        FileInputStream stream = new FileInputStream(new File(absolutePath));
        try {
            FileChannel fc = stream.getChannel();
            MappedByteBuffer bb = fc.map(FileChannel.MapMode.READ_ONLY, 0, fc.size());
            /* Instead of using default, pass in a decoder. */
            return Charset.forName("UTF-8").decode(bb).toString();
        } finally {
            stream.close();
        }
    } catch (IOException e) {
        e.printStackTrace();
    }
    return null;
}

---

From source file:com.datafibers.kafka.connect.SchemaedFileSourceTask.java

private List<SourceRecord> pollFromFile() throws InterruptedException {
    log.trace("pollFromFile");
    CsvSchema bootstrapCsv;//w w  w.  j a v a 2 s  . c  om
    CsvMapper csvMapper = new CsvMapper();
    ObjectMapper jsonMapper = new ObjectMapper();
    MappingIterator<Map<?, ?>> mappingIterator;
    ArrayList<SourceRecord> records = null;
    long currentTime = System.currentTimeMillis();
    long recordsPerPoll;

    // TODO: Improve ExceptionOnEof logic.
    // The code below only works when each pass through
    // poll() reads all available records (not a given).
    if (config.getExceptionOnEof() && streamOffset != null) {
        throw new ConnectException("No more deta available on FileInputStream");
    }

    // Initialize the bootstrapCsv schema if necessary
    if (recordSchema == null || inputType.equalsIgnoreCase("json")) {
        log.trace("Constructing csvSchema from emptySchema");
        bootstrapCsv = config.getCsvHeaders() ? CsvSchema.emptySchema().withHeader()
                : CsvSchema.emptySchema().withoutHeader();
    } else {
        // We've seen a schema, so we'll assume headers from the recordSchema
        log.trace("Constructing csvSchema from recordSchema");
        CsvSchema.Builder builder = new CsvSchema.Builder();
        builder.setUseHeader(false);
        builder.setColumnSeparator(',');
        for (Field f : recordSchema.fields()) {
            log.trace("adding column {}", f.name());
            builder.addColumn(f.name());
        }
        bootstrapCsv = builder.build();
    }
    try {
        if (stream == null)
            openFileStream();
        if (reader == null)
            reader = new BufferedReader(new InputStreamReader(stream));

        if (inputType.equalsIgnoreCase("json")) {
            mappingIterator = jsonMapper.readerFor(Map.class).readValues(reader);
        } else if (inputType.equalsIgnoreCase("csv")) {
            mappingIterator = csvMapper.readerWithSchemaFor(Map.class).with(bootstrapCsv).readValues(reader);
        } else {
            log.error("Unsupported file input type specified ({})", inputType);
            return null;
        }
    } catch (FileNotFoundException fnf) {
        log.warn("Couldn't find file {} for SchemaedFileSourceTask, sleeping to wait for it to be created",
                logFilename());
        synchronized (this) {
            this.wait(1000);
        }
        return null;
    } catch (IOException e) {
        // IOException thrown when no more records in stream
        log.warn("Processed all available data from {}; sleeping to wait additional records", logFilename());
        // Close reader and stream; swallowing exceptions ... we're about to throw a Retry
        try {
            reader.close();
        } catch (Exception nested) {
        } finally {
            reader = null;
        }

        if (stream != System.in) {
            try {
                stream.close();
            } catch (Exception nested) {
            } finally {
                stream = null;
            }
        }

        synchronized (this) {
            this.wait(1000);
        }
        return null;
    }
    log.debug("mappingIterator of type {} created; begin reading data file",
            mappingIterator.getClass().toString());

    // The csvMapper class is really screwy; can't figure out why it
    // won't return a rational Schema ... so we'll extract it from the
    // the first object later.
    if (recordSchema == null && inputType.equalsIgnoreCase("csv") && csvMapper.schema().size() > 0) {
        recordSchema = ConvertMappingSchema(csvMapper.schemaWithHeader());
        log.trace("recordSchema created from csvMapper; type {}", recordSchema.type().toString());
    }
    try {
        FileInputStream fstream = (FileInputStream) stream;
        Long lastElementOffset = streamOffset;
        recordsPerPoll = 3;

        while (mappingIterator.hasNext()) {
            Map<?, ?> element = mappingIterator.next();
            Long elementOffset, iteratorOffset;
            recordCount++;
            recordsPerPoll--;

            iteratorOffset = mappingIterator.getCurrentLocation().getByteOffset(); // never works !!!
            if (iteratorOffset < 0) {
                // The stream channel will CLOSE on the last clean record
                // seen by mapping Iterator, so we have be careful here
                // Additionally, when parsing CSV files, there seems to be a
                // lot of Bad File Descriptor errors; ignore them.
                try {
                    elementOffset = fstream.getChannel().position();
                } catch (java.nio.channels.ClosedChannelException e) {
                    log.trace("getChannel.position threw {}", e.toString());
                    elementOffset = lastElementOffset;
                } catch (IOException e) {
                    log.trace("getChannel.position threw {}", e.toString());
                    elementOffset = lastElementOffset;
                }
            } else {
                log.trace("mappingIterator.getCurrentLocation() returns {}", iteratorOffset.toString());
                elementOffset = iteratorOffset;
            }
            log.trace("Next input record: {} (class {}) from file position {}", element.toString(),
                    element.getClass().toString(), elementOffset.toString());

            if (recordSchema == null) {
                recordSchema = ConvertMappingSchema(element.keySet());
                log.trace("recordSchema created from element; type {}", recordSchema.type().toString());
            }

            if (records == null)
                records = new ArrayList<>();
            records.add(new SourceRecord(offsetKey(filename), offsetValue(elementOffset), topic, recordSchema,
                    ConvertMappingElement(recordSchema, (HashMap<?, ?>) element)));
            streamOffset = lastElementOffset = elementOffset;
        }
    } catch (Exception e) {
        throw new ConnectException(e);
    }

    lastPollTime = currentTime;
    return records;
}

---

From source file:com.eucalyptus.blockstorage.DASManager.java

public void dupFile(String oldFileName, String newFileName) {
    FileOutputStream fileOutputStream = null;
    FileChannel out = null;// w ww.  java  2  s  .com
    FileInputStream fileInputStream = null;
    FileChannel in = null;
    try {
        fileOutputStream = new FileOutputStream(new File(newFileName));
        out = fileOutputStream.getChannel();
        fileInputStream = new FileInputStream(new File(oldFileName));
        in = fileInputStream.getChannel();
        in.transferTo(0, in.size(), out);
    } catch (Exception ex) {
        ex.printStackTrace();
    } finally {
        if (fileOutputStream != null) {
            try {
                out.close();
                fileOutputStream.close();
            } catch (IOException e) {
                LOG.error(e);
            }
        }
        if (fileInputStream != null) {
            try {
                in.close();
                fileInputStream.close();
            } catch (IOException e) {
                LOG.error(e);
            }
        }
    }
}

---

From source file:com.servoy.j2db.util.Utils.java

public static byte[] readFile(File f, long size) {
    if (f != null && f.exists()) {

        FileInputStream fis = null;
        try {/*from w  w w  . j  a  v  a  2 s.c o  m*/
            int length = (int) f.length();
            fis = new FileInputStream(f);
            FileChannel fc = fis.getChannel();
            if (size > length || size < 0)
                size = length;
            ByteBuffer bb = ByteBuffer.allocate((int) size);
            fc.read(bb);
            bb.rewind();
            byte[] bytes = null;
            if (bb.hasArray()) {
                bytes = bb.array();
            } else {
                bytes = new byte[(int) size];
                bb.get(bytes, 0, (int) size);
            }
            return bytes;
        } catch (Exception e) {
            Debug.error("Error reading file: " + f, e); //$NON-NLS-1$
        } finally {
            try {
                if (fis != null)
                    fis.close();
            } catch (Exception ex) {
            }
        }

        //         ByteArrayOutputStream sb = new ByteArrayOutputStream();
        //         try
        //         {
        //            FileInputStream is = new FileInputStream(f);
        //            BufferedInputStream bis = new BufferedInputStream(is);
        //            streamCopy(bis, sb);
        //            closeInputStream(bis);
        //         }
        //         catch (Exception e)
        //         {
        //            Debug.error(e);
        //         }
        //         return sb.toByteArray();
    }
    return null;
}

---

From source file:com.servoy.j2db.util.Utils.java

public static String getTXTFileContent(File f, Charset charset) {
    if (f != null /* && f.exists() */) {
        if (Thread.currentThread().isInterrupted()) {
            Thread.interrupted(); // reset interrupted flag of current thread, FileChannel.read() will throw an exception for it.
        }/*  w  ww. j a  v a 2s. c  om*/
        FileInputStream fis = null;
        try {
            int length = (int) f.length();
            if (f.exists()) {
                fis = new FileInputStream(f);
                FileChannel fc = fis.getChannel();
                ByteBuffer bb = ByteBuffer.allocate(length);
                fc.read(bb);
                bb.rewind();
                CharBuffer cb = charset.decode(bb);
                return cb.toString();
            }
        } catch (Exception e) {
            Debug.error("Error reading txt file: " + f, e); //$NON-NLS-1$
        } finally {
            closeInputStream(fis);
        }
    }
    return null;
}

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