org.apache.ratis.util

接口 IOUtils

public interface IOUtils

IO related utility methods.

方法概要

限定符和类型	方法和说明
static IOException	asIOException(Throwable t)
static <T> T	bytes2Object(byte[] bytes, Class<T> clazz)
static void	cleanup(org.slf4j.Logger log, Closeable... closeables) Close the Closeable objects and ignore any Throwable or null pointers.
static <T> T	getFromFuture(CompletableFuture<T> future, Supplier<Object> name)
static <T> T	getFromFuture(CompletableFuture<T> future, Supplier<Object> name, TimeDuration timeout)
static byte[]	object2Bytes(Object obj) Serialize the given object to a byte array using ObjectOutputStream.writeObject(Object).
static long	preallocate(FileChannel fc, long size, ByteBuffer fill)
static void	readFully(InputStream in, byte[] buf, int off, int len) Reads len bytes in a loop.
static void	readFully(InputStream in, int buffSize)
static <T> T	readObject(InputStream in, Class<T> clazz) Read an object from the given input stream.
static boolean	shouldReconnect(Throwable e)
static void	skipFully(InputStream in, long len) Similar to readFully().
static InterruptedIOException	toInterruptedIOException(String message, InterruptedException e)
static IOException	toIOException(ExecutionException e)
static void	writeFully(FileChannel fc, ByteBuffer buf, long offset) Write a ByteBuffer to a FileChannel at a given offset, handling short writes.

方法详细资料

toInterruptedIOException

static InterruptedIOException toInterruptedIOException(String message,
                                                       InterruptedException e)

asIOException

static IOException asIOException(Throwable t)

toIOException

static IOException toIOException(ExecutionException e)

getFromFuture

static <T> T getFromFuture(CompletableFuture<T> future,
                           Supplier<Object> name)
                    throws IOException

抛出:

IOException

getFromFuture

static <T> T getFromFuture(CompletableFuture<T> future,
                           Supplier<Object> name,
                           TimeDuration timeout)
                    throws IOException

抛出:

IOException

shouldReconnect

static boolean shouldReconnect(Throwable e)

readFully

static void readFully(InputStream in,
                      int buffSize)
               throws IOException

抛出:

IOException

readFully

static void readFully(InputStream in,
                      byte[] buf,
                      int off,
                      int len)
               throws IOException

Reads len bytes in a loop.

参数:

in - InputStream to read from

buf - The buffer to fill

off - offset from the buffer

len - the length of bytes to read

抛出:

IOException - if it could not read requested number of bytes for any reason (including EOF)

writeFully

static void writeFully(FileChannel fc,
                       ByteBuffer buf,
                       long offset)
                throws IOException

Write a ByteBuffer to a FileChannel at a given offset, handling short writes.

参数:

fc - The FileChannel to write to

buf - The input buffer

offset - The offset in the file to start writing at

抛出:

IOException - On I/O error

preallocate

static long preallocate(FileChannel fc,
                        long size,
                        ByteBuffer fill)
                 throws IOException

抛出:

IOException

skipFully

static void skipFully(InputStream in,
                      long len)
               throws IOException

Similar to readFully(). Skips bytes in a loop.

参数:

in - The InputStream to skip bytes from

len - number of bytes to skip.

抛出:

IOException - if it could not skip requested number of bytes for any reason (including EOF)

cleanup

static void cleanup(org.slf4j.Logger log,
                    Closeable... closeables)

Close the Closeable objects and ignore any Throwable or null pointers. Must only be used for cleanup in exception handlers.

参数:

log - the log to record problems to at debug level. Can be null.

closeables - the objects to close

object2Bytes

static byte[] object2Bytes(Object obj)

Serialize the given object to a byte array using ObjectOutputStream.writeObject(Object).

bytes2Object

static <T> T bytes2Object(byte[] bytes,
                          Class<T> clazz)

readObject

static <T> T readObject(InputStream in,
                        Class<T> clazz)

Read an object from the given input stream.

类型参数:

T - The class type.

参数:

in - input stream to read from.

clazz - the class of the object.

返回:

the object read from the stream.